diff --git a/zokrates_book/src/concepts/stdlib.md b/zokrates_book/src/concepts/stdlib.md
index 92f710ac..29c78930 100644
--- a/zokrates_book/src/concepts/stdlib.md
+++ b/zokrates_book/src/concepts/stdlib.md
@@ -12,7 +12,7 @@ The following section highlights a subset of available imports:
 import "hashes/sha256/512Padded.zok"
 ```
 
-A function that takes 2 `field[256]` arrays as inputs and returns their sha256 compression function as an array of 256 field elements.
+A function that takes 2 `bool[256]` arrays as inputs and returns their sha256 compression function as an array of 256 booleans.
 
 #### sha256compression
 
@@ -20,7 +20,7 @@ A function that takes 2 `field[256]` arrays as inputs and returns their sha256 c
 import "hashes/sha256/512bit.zok"
 ```
 
-A function that takes 2 `field[256]` arrays as inputs and returns their sha256 compression function as an array of 256 field elements.
+A function that takes 2 `bool[256]` arrays as inputs and returns their sha256 compression function as an array of 256 booleans.
 The difference with `sha256` is that no padding is added at the end of the message, which makes it more efficient but also less compatible with Solidity.
 
 There also is support for 2-round (1024-bit input) and 3-round (1536-bit input) variants, using  `hashes/1024bit.zok` and `hashes/1536bit.zok` respectively.
@@ -61,7 +61,7 @@ Verifies an EdDSA Signature. Checks the correctness of a given EdDSA Signature `
 import "utils/pack/pack128"
 ```
 
-Packs 128 field elements as one.
+Packs 128 booleans as one field element.
 
 #### unpack128
 
@@ -69,7 +69,7 @@ Packs 128 field elements as one.
 import "utils/pack/unpack128"
 ```
 
-Unpacks a field element to 128 field elements.
+Unpacks a field element to 128 booleans.
 
 #### pack256
 
@@ -77,7 +77,7 @@ Unpacks a field element to 128 field elements.
 import "utils/pack/pack256"
 ```
 
-Packs 256 field elements as one. Overflows can occur.
+Packs 256 booleans as one. Overflows can occur.
 
 #### nonStrictUnpack256
 
@@ -85,5 +85,5 @@ Packs 256 field elements as one. Overflows can occur.
 import "utils/pack/nonStrictUnpack256"
 ```
 
-Unpacks a field element into 256 field elements. Uniqueness of the output is not guaranteed.
+Unpacks a field element into 256 booleans. Uniqueness of the output is not guaranteed.
 
diff --git a/zokrates_cli/examples/merkleTree/pedersenPathProof3.zok b/zokrates_cli/examples/merkleTree/pedersenPathProof3.zok
index 1ac9251f..148ecd7f 100644
--- a/zokrates_cli/examples/merkleTree/pedersenPathProof3.zok
+++ b/zokrates_cli/examples/merkleTree/pedersenPathProof3.zok
@@ -3,17 +3,17 @@ import "ecc/edwardsCompress" as edwardsCompress
 import "ecc/babyjubjubParams" as context
 from "ecc/babyjubjubParams" import BabyJubJubParams
 import "hashes/utils/256bitsDirectionHelper" as multiplex
-import "utils/binary/not" as NOT
+
 // Merke-Tree inclusion proof for tree depth 3 using SNARK efficient pedersen hashes
 // directionSelector=> 1/true if current digest is on the rhs of the hash
-def main(field[256] rootDigest, private field[256] leafDigest, private field[3] directionSelector, field[256] PathDigest0, private field[256] PathDigest1, private field[256] PathDigest2) -> (field):
+def main(bool[256] rootDigest, private bool[256] leafDigest, private bool[3] directionSelector, bool[256] PathDigest0, private bool[256] PathDigest1, private bool[256] PathDigest2) -> (field):
 	BabyJubJubParams context = context()
 
 	//Setup
-	field[256] currentDigest = leafDigest
+	bool[256] currentDigest = leafDigest
 	
 	//Loop up the tree
-	field[512] preimage = multiplex(directionSelector[0], currentDigest, PathDigest0)
+	bool[512] preimage = multiplex(directionSelector[0], currentDigest, PathDigest0)
 	currentDigest = hash(preimage)
 
 	preimage = multiplex(directionSelector[1], currentDigest, PathDigest1)
diff --git a/zokrates_cli/examples/merkleTree/sha256PathProof3.zok b/zokrates_cli/examples/merkleTree/sha256PathProof3.zok
index 8d9bd0f3..666d84fb 100644
--- a/zokrates_cli/examples/merkleTree/sha256PathProof3.zok
+++ b/zokrates_cli/examples/merkleTree/sha256PathProof3.zok
@@ -1,26 +1,25 @@
 import "hashes/sha256/512bit" as sha256
 import "utils/multiplexer/256bit" as multiplex
-import "utils/binary/not" as NOT
 
 // Merkle-Tree inclusion proof for tree depth 3
 
-def main(field treeDepth, field[256] rootDigest, private field[256] leafDigest, private field[2] directionSelector, field[256] PathDigest0, private field[256] PathDigest1) -> (field):
+def main(field treeDepth, bool[256] rootDigest, private bool[256] leafDigest, private bool[2] directionSelector, bool[256] PathDigest0, private bool[256] PathDigest1) -> (field):
 
 	//Setup
-	field[256] currentDigest = leafDigest
+	bool[256] currentDigest = leafDigest
 	field counter = 1
-	field currentDirection = 0
+	bool currentDirection = false
 	
 	//Loop up the tree
 	currentDirection = directionSelector[0]
-	field[256] lhs = multiplex(currentDirection, currentDigest, PathDigest0)
-	field[256] rhs = multiplex(NOT(currentDirection), currentDigest, PathDigest0)
+	bool[256] lhs = multiplex(currentDirection, currentDigest, PathDigest0)
+	bool[256] rhs = multiplex(!currentDirection, currentDigest, PathDigest0)
 	currentDigest = sha256(lhs, rhs)
 	counter = counter + 1
 
 	currentDirection = directionSelector[1]
 	lhs = multiplex(currentDirection, currentDigest, PathDigest1)
-	rhs = multiplex(NOT(currentDirection), currentDigest, PathDigest1)
+	rhs = multiplex(!currentDirection, currentDigest, PathDigest1)
 	currentDigest = sha256(lhs, rhs)
 	counter = counter + 1
 
diff --git a/zokrates_cli/examples/merkleTree/testpedersenPathProof3.zok b/zokrates_cli/examples/merkleTree/testpedersenPathProof3.zok
deleted file mode 100644
index 29b2c4c2..00000000
--- a/zokrates_cli/examples/merkleTree/testpedersenPathProof3.zok
+++ /dev/null
@@ -1,20 +0,0 @@
-import "./pedersenPathProof3"
-// Merke-Tree inclusion proof for tree depth 3
-// def main(field treeDepth, field[256] rootDigest, private field[256] leafDigest, private field[2] directionSelector, field[256] PathDigest0, private field[256] PathDigest1) -> (field):
-def main() -> (field):
-
-	//Setup
-	field[256] leafDigest = [0,1,1,0,1,1,1,1,1,0,0,1,1,0,1,0,0,1,0,1,0,1,0,1,0,0,0,0,0,1,0,0,1,0,0,1,0,0,0,1,1,1,1,0,1,1,1,0,1,1,0,1,0,0,1,1,0,0,1,1,1,1,0,1,1,1,0,0,1,1,1,1,1,0,0,0,1,1,0,1,0,1,0,1,0,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,0,1,0,0,0,0,1,0,0,1,1,0,0,0,0,1,0,0,0,1,1,0,1,1,0,0,1,0,0,0,1,1,1,1,0,0,0,0,1,0,1,1,0,1,1,0,0,1,1,0,1,1,0,1,0,1,1,1,0,0,0,1,1,0,1,1,1,0,0,1,0,1,1,1,1,0,0,0,1,0,0,1,1,1,1,1,0,1,0,1,1,1,0,0,0,1,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,0,1,0,1,0,0,0,0,1,0,1,1,0,1,1,1,0,0,1,1,0,0,0,1,0,1,0,1,0,1]
-	
-	//Loop up the tree
-	field[256] PathDigest0 = [0,1,0,0,0,0,0,1,0,0,0,0,1,0,1,0,0,1,0,1,1,0,1,0,1,0,0,1,1,1,0,1,1,1,0,0,1,1,0,1,1,1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,1,1,1,1,1,0,1,0,0,1,1,1,1,1,0,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1,0,0,1,1,1,0,0,0,0,1,0,1,1,1,1,1,0,1,0,0,1,0,1,1,0,0,1,1,1,0,1,1,0,0,1,1,0,0,0,1,1,0,1,1,0,0,0,1,1,1,0,0,1,1,0,1,1,1,1,0,1,0,1,1,1,0,0,1,1,0,1,0,0,0,1,0,0,0,1,1,1,0,0,1,1,1,1,0,1,0,0,0,1,0,0,0,1,1,1,1,0,1,1,1,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,1,1,0,1,0,0,1,1,1,1,1,1,0,0,1,0,0,0,0,1,0,1,1,1,1,0,0,1,0,0,1,0,0,0,1,0,0,0,1,0,0,1,1,0,0,0,0,1,1,1,1]
-	field[256] PathDigest1 = [0,1,1,1,1,1,0,1,0,1,0,1,0,0,0,0,0,1,0,1,1,0,0,1,0,1,1,0,0,1,1,0,0,1,1,0,0,1,0,1,1,0,0,1,0,1,1,0,1,0,1,0,0,0,0,0,0,0,1,1,0,0,0,1,1,0,1,1,1,1,1,0,1,0,0,1,0,0,0,0,1,1,0,0,0,1,1,1,1,1,0,0,0,1,0,0,0,0,1,0,1,0,1,0,0,0,1,0,1,1,0,1,1,1,1,1,0,1,0,0,1,0,1,0,1,1,0,1,0,1,0,0,0,0,0,1,0,1,1,1,0,1,1,1,1,0,1,1,0,0,1,1,0,1,0,1,1,0,1,1,1,1,0,0,0,0,1,0,1,0,1,0,0,0,1,0,0,0,0,1,0,0,1,0,1,0,1,1,1,0,1,0,1,0,0,1,1,1,1,1,0,1,0,1,1,0,0,0,1,1,0,0,0,1,1,1,0,0,1,1,1,1,1,0,0,1,0,1,0,0,0,1,1,0,0,0,0,1,0,1,1,1,0,1,0,0,1,1,0,0,0,1,0,1,0,0]
-	field[256] PathDigest2 = [1,1,0,0,1,1,1,0,0,0,0,1,1,1,0,0,1,1,1,0,1,0,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,0,1,1,1,0,1,1,1,0,1,0,0,0,1,0,0,1,0,0,1,0,1,1,0,0,0,1,1,1,0,0,0,0,1,1,0,0,1,1,1,0,0,0,1,0,0,1,0,0,1,1,0,0,0,1,1,0,0,0,0,0,0,0,1,1,0,1,1,1,1,1,1,0,1,0,0,1,0,1,1,1,1,0,0,1,0,0,1,1,0,0,1,0,0,1,1,0,0,0,0,1,0,1,0,0,0,0,0,1,0,0,1,0,1,0,0,0,1,1,0,1,1,0,0,0,1,0,0,1,0,0,0,0,0,1,0,0,1,1,0,0,0,1,1,0,1,1,1,1,1,1,1,0,1,0,1,1,0,0,1,1,1,1,1,1,1,1,1,1,0,0,1,0,1,1,1,0,1,0,1,1,0,0,0,0,1,0,1,0,1,1,1,1,1,0,0,0,0,1,1,0,0,1,1,0,0,0,1,0,0,0,0,1,0,0,1,0,0,1]
-
-	// 	//Asserts
-	field[256] rootDigest = [0,0,1,0,1,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,1,0,1,0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,1,1,1,1,0,0,1,0,0,1,1,0,0,1,1,1,1,1,0,0,1,1,1,0,1,1,0,1,1,1,1,0,0,1,1,0,1,1,0,1,0,1,0,1,0,0,1,1,0,0,0,1,0,1,1,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,1,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,1,0,0,1,1,1,0,1,1,0,0,0,1,0,1,1,1,0,0,1,0,1,0,1,1,0,1,0,1,0,1,0,1,0,0,1,1,1,1,0,0,0,0,0,1,1,1,1,1,1,1,0,1,0,1,0,1,1,0,1,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,1,0,0,0,1,1,0,0,1,0,0,0,1,1,0,0,1,1,1,0,0,1,1,0,1,0,1,0,1,0,0,0,0,1,1,1,0,0,0,1,0,0,1,0,1,1,1,0,0]
-
-	field success = pedersenPathProof3(rootDigest, leafDigest, [0, 0, 0], PathDigest0, PathDigest1, PathDigest2)
-
-	return 1 //return true in success
-
diff --git a/zokrates_cli/examples/merkleTree/testsha256PathProof3.zok b/zokrates_cli/examples/merkleTree/testsha256PathProof3.zok
deleted file mode 100644
index bd12492b..00000000
--- a/zokrates_cli/examples/merkleTree/testsha256PathProof3.zok
+++ /dev/null
@@ -1,13 +0,0 @@
-import "./sha256PathProof3" as merkleTreeProof
-def main() -> (field):
-
-    field treeDepth = 3
-	field[256] rootDigest = [1 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,0 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,0 ,0 ,1 ,1 ,1 ,1 ,0 ,0 ,1 ,0 ,1 ,0 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,0 ,1 ,1 ,0 ,1 ,0 ,1 ,1 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,0 ,0 ,1 ,0 ,1 ,1 ,1 ,0 ,1 ,0 ,1 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,1 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,0 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,1 ,0]
-    field[256]  leafDigest = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
-    field[2] directionSelector = [0, 0]
-    field[256] PathDigest0 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
-    field[256] PathDigest1	= [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
-
-    field out = merkleTreeProof(treeDepth,rootDigest,leafDigest,directionSelector,PathDigest0,PathDigest1)
-
-    return 1
\ No newline at end of file
diff --git a/zokrates_cli/tests/code/sha_round.arguments.json b/zokrates_cli/tests/code/sha_round.arguments.json
index b0eb4bb3..ef766341 100644
--- a/zokrates_cli/tests/code/sha_round.arguments.json
+++ b/zokrates_cli/tests/code/sha_round.arguments.json
@@ -1,260 +1,260 @@
 [
     [
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "1",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "1",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "0",
-        "1",
-        "0",
-        "1",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "0",
-        "1",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "0",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "1",
-        "0",
-        "1",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "1",
-        "1",
-        "0",
-        "0",
-        "0",
-        "0",
-        "1",
-        "1",
-        "1",
-        "1",
-        "0",
-        "1",
-        "0",
-        "0",
-        "1",
-        "0",
-        "1",
-        "1",
-        "0",
-        "1"
+        false,
+        false,
+        false,
+        true,
+        true,
+        true,
+        true,
+        true,
+        false,
+        false,
+        true,
+        true,
+        true,
+        false,
+        true,
+        true,
+        true,
+        false,
+        false,
+        false,
+        true,
+        false,
+        true,
+        true,
+        true,
+        false,
+        false,
+        true,
+        true,
+        false,
+        false,
+        false,
+        true,
+        true,
+        false,
+        false,
+        false,
+        false,
+        true,
+        false,
+        false,
+        false,
+        false,
+        true,
+        true,
+        true,
+        true,
+        false,
+        true,
+        false,
+        true,
+        true,
+        true,
+        false,
+        false,
+        false,
+        true,
+        false,
+        false,
+        true,
+        false,
+        true,
+        false,
+        false,
+        false,
+        false,
+        true,
+        true,
+        true,
+        true,
+        false,
+        false,
+        true,
+        false,
+        false,
+        false,
+        true,
+        true,
+        true,
+        false,
+        true,
+        true,
+        true,
+        false,
+        false,
+        false,
+        true,
+        true,
+        false,
+        false,
+        true,
+        true,
+        false,
+        false,
+        true,
+        false,
+        false,
+        false,
+        true,
+        false,
+        true,
+        true,
+        false,
+        false,
+        false,
+        false,
+        false,
+        true,
+        false,
+        true,
+        false,
+        false,
+        false,
+        false,
+        false,
+        true,
+        false,
+        true,
+        false,
+        false,
+        true,
+        false,
+        true,
+        true,
+        false,
+        true,
+        true,
+        false,
+        false,
+        false,
+        false,
+        true,
+        false,
+        false,
+        false,
+        false,
+        false,
+        true,
+        false,
+        true,
+        false,
+        true,
+        false,
+        true,
+        false,
+        true,
+        true,
+        false,
+        false,
+        false,
+        true,
+        false,
+        false,
+        true,
+        true,
+        false,
+        false,
+        false,
+        false,
+        true,
+        false,
+        true,
+        false,
+        false,
+        true,
+        true,
+        true,
+        false,
+        false,
+        true,
+        true,
+        true,
+        false,
+        false,
+        true,
+        true,
+        true,
+        false,
+        false,
+        false,
+        true,
+        true,
+        true,
+        true,
+        false,
+        false,
+        true,
+        true,
+        false,
+        true,
+        false,
+        true,
+        true,
+        true,
+        true,
+        false,
+        true,
+        true,
+        true,
+        true,
+        false,
+        false,
+        false,
+        true,
+        false,
+        false,
+        true,
+        true,
+        true,
+        false,
+        true,
+        false,
+        false,
+        false,
+        false,
+        false,
+        false,
+        true,
+        true,
+        true,
+        true,
+        false,
+        true,
+        true,
+        true,
+        true,
+        true,
+        false,
+        true,
+        false,
+        true,
+        false,
+        true,
+        true,
+        false,
+        false,
+        true,
+        true,
+        false,
+        false,
+        false,
+        false,
+        true,
+        true,
+        true,
+        true,
+        false,
+        true,
+        false,
+        false,
+        true,
+        false,
+        true,
+        true,
+        false,
+        true
     ]
 ]
\ No newline at end of file
diff --git a/zokrates_cli/tests/code/sha_round.zok b/zokrates_cli/tests/code/sha_round.zok
index eba97306..a2222a40 100644
--- a/zokrates_cli/tests/code/sha_round.zok
+++ b/zokrates_cli/tests/code/sha_round.zok
@@ -1,11 +1,14 @@
 import "EMBED/sha256round" as sha256
 
-def main(private field[256] expected) -> (field):
+def main(private bool[256] expected) -> (field):
 
-	field[256] a = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
- 	field[256] b = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
- 	field[256] IV  = [0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1]
+	bool[256] a = [false; 256]
+ 	bool[256] b = [false; 256]
+ 	b[253] = true
+ 	b[255] = true
+ 	
+ 	bool[256] IV  = [false, true, true, false, true, false, true, false, false, false, false, false, true, false, false, true, true, true, true, false, false, true, true, false, false, true, true, false, false, true, true, true, true, false, true, true, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, true, true, true, false, true, false, false, false, false, true, false, true, false, false, true, true, true, true, false, false, false, true, true, false, true, true, true, false, true, true, true, true, false, false, true, true, false, true, true, true, false, false, true, false, true, false, true, false, false, true, false, true, false, true, false, false, true, true, true, true, true, true, true, true, false, true, false, true, false, false, true, true, true, false, true, false, false, true, false, true, false, false, false, true, false, false, false, false, true, true, true, false, false, true, false, true, false, false, true, false, false, true, true, true, true, true, true, true, true, false, false, true, true, false, true, true, false, false, false, false, false, true, false, true, false, true, true, false, true, false, false, false, true, false, false, false, true, true, false, false, false, false, false, true, true, true, true, true, true, false, false, false, false, false, true, true, true, true, false, true, true, false, false, true, true, false, true, false, true, false, true, true, false, true, false, true, true, false, true, true, true, true, true, false, false, false, false, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, false, true]
 
-	expected == sha256([a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], a[11], a[12], a[13], a[14], a[15], a[16], a[17], a[18], a[19], a[20], a[21], a[22], a[23], a[24], a[25], a[26], a[27], a[28], a[29], a[30], a[31], a[32], a[33], a[34], a[35], a[36], a[37], a[38], a[39], a[40], a[41], a[42], a[43], a[44], a[45], a[46], a[47], a[48], a[49], a[50], a[51], a[52], a[53], a[54], a[55], a[56], a[57], a[58], a[59], a[60], a[61], a[62], a[63], a[64], a[65], a[66], a[67], a[68], a[69], a[70], a[71], a[72], a[73], a[74], a[75], a[76], a[77], a[78], a[79], a[80], a[81], a[82], a[83], a[84], a[85], a[86], a[87], a[88], a[89], a[90], a[91], a[92], a[93], a[94], a[95], a[96], a[97], a[98], a[99], a[100], a[101], a[102], a[103], a[104], a[105], a[106], a[107], a[108], a[109], a[110], a[111], a[112], a[113], a[114], a[115], a[116], a[117], a[118], a[119], a[120], a[121], a[122], a[123], a[124], a[125], a[126], a[127], a[128], a[129], a[130], a[131], a[132], a[133], a[134], a[135], a[136], a[137], a[138], a[139], a[140], a[141], a[142], a[143], a[144], a[145], a[146], a[147], a[148], a[149], a[150], a[151], a[152], a[153], a[154], a[155], a[156], a[157], a[158], a[159], a[160], a[161], a[162], a[163], a[164], a[165], a[166], a[167], a[168], a[169], a[170], a[171], a[172], a[173], a[174], a[175], a[176], a[177], a[178], a[179], a[180], a[181], a[182], a[183], a[184], a[185], a[186], a[187], a[188], a[189], a[190], a[191], a[192], a[193], a[194], a[195], a[196], a[197], a[198], a[199], a[200], a[201], a[202], a[203], a[204], a[205], a[206], a[207], a[208], a[209], a[210], a[211], a[212], a[213], a[214], a[215], a[216], a[217], a[218], a[219], a[220], a[221], a[222], a[223], a[224], a[225], a[226], a[227], a[228], a[229], a[230], a[231], a[232], a[233], a[234], a[235], a[236], a[237], a[238], a[239], a[240], a[241], a[242], a[243], a[244], a[245], a[246], a[247], a[248], a[249], a[250], a[251], a[252], a[253], a[254], a[255], b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15], b[16], b[17], b[18], b[19], b[20], b[21], b[22], b[23], b[24], b[25], b[26], b[27], b[28], b[29], b[30], b[31], b[32], b[33], b[34], b[35], b[36], b[37], b[38], b[39], b[40], b[41], b[42], b[43], b[44], b[45], b[46], b[47], b[48], b[49], b[50], b[51], b[52], b[53], b[54], b[55], b[56], b[57], b[58], b[59], b[60], b[61], b[62], b[63], b[64], b[65], b[66], b[67], b[68], b[69], b[70], b[71], b[72], b[73], b[74], b[75], b[76], b[77], b[78], b[79], b[80], b[81], b[82], b[83], b[84], b[85], b[86], b[87], b[88], b[89], b[90], b[91], b[92], b[93], b[94], b[95], b[96], b[97], b[98], b[99], b[100], b[101], b[102], b[103], b[104], b[105], b[106], b[107], b[108], b[109], b[110], b[111], b[112], b[113], b[114], b[115], b[116], b[117], b[118], b[119], b[120], b[121], b[122], b[123], b[124], b[125], b[126], b[127], b[128], b[129], b[130], b[131], b[132], b[133], b[134], b[135], b[136], b[137], b[138], b[139], b[140], b[141], b[142], b[143], b[144], b[145], b[146], b[147], b[148], b[149], b[150], b[151], b[152], b[153], b[154], b[155], b[156], b[157], b[158], b[159], b[160], b[161], b[162], b[163], b[164], b[165], b[166], b[167], b[168], b[169], b[170], b[171], b[172], b[173], b[174], b[175], b[176], b[177], b[178], b[179], b[180], b[181], b[182], b[183], b[184], b[185], b[186], b[187], b[188], b[189], b[190], b[191], b[192], b[193], b[194], b[195], b[196], b[197], b[198], b[199], b[200], b[201], b[202], b[203], b[204], b[205], b[206], b[207], b[208], b[209], b[210], b[211], b[212], b[213], b[214], b[215], b[216], b[217], b[218], b[219], b[220], b[221], b[222], b[223], b[224], b[225], b[226], b[227], b[228], b[229], b[230], b[231], b[232], b[233], b[234], b[235], b[236], b[237], b[238], b[239], b[240], b[241], b[242], b[243], b[244], b[245], b[246], b[247], b[248], b[249], b[250], b[251], b[252], b[253], b[254], b[255]], IV)
+	expected == sha256([...a, ...b], IV)
 
 	return 1
\ No newline at end of file
diff --git a/zokrates_core/src/embed.rs b/zokrates_core/src/embed.rs
index 6511d656..ad45f53f 100644
--- a/zokrates_core/src/embed.rs
+++ b/zokrates_core/src/embed.rs
@@ -28,13 +28,13 @@ impl FlatEmbed {
         match self {
             FlatEmbed::Sha256Round => Signature::new()
                 .inputs(vec![
-                    Type::array(Type::FieldElement, 512),
-                    Type::array(Type::FieldElement, 256),
+                    Type::array(Type::Boolean, 512),
+                    Type::array(Type::Boolean, 256),
                 ])
-                .outputs(vec![Type::array(Type::FieldElement, 256)]),
+                .outputs(vec![Type::array(Type::Boolean, 256)]),
             FlatEmbed::Unpack(bitwidth) => Signature::new()
                 .inputs(vec![Type::FieldElement])
-                .outputs(vec![Type::array(Type::FieldElement, *bitwidth)]),
+                .outputs(vec![Type::array(Type::Boolean, *bitwidth)]),
             FlatEmbed::U8ToBits => Signature::new()
                 .inputs(vec![Type::Uint(8)])
                 .outputs(vec![Type::array(Type::Boolean, 8)]),
diff --git a/zokrates_core/src/static_analysis/propagation.rs b/zokrates_core/src/static_analysis/propagation.rs
index 5f11d48a..8837d124 100644
--- a/zokrates_core/src/static_analysis/propagation.rs
+++ b/zokrates_core/src/static_analysis/propagation.rs
@@ -267,9 +267,9 @@ impl<'ast, T: Field> Folder<'ast, T> for Propagator<'ast, T> {
                                                 for i in (0..T::get_required_bits()).rev() {
                                                     if T::from(2).pow(i) <= num {
                                                         num = num - T::from(2).pow(i);
-                                                        res.push(T::from(1));
+                                                        res.push(true);
                                                     } else {
-                                                        res.push(T::from(0));
+                                                        res.push(false);
                                                     }
                                                 }
                                                 assert_eq!(num, T::zero());
@@ -278,15 +278,11 @@ impl<'ast, T: Field> Folder<'ast, T> for Propagator<'ast, T> {
                                                     ArrayExpressionInner::Value(
                                                         res.into_iter()
                                                             .map(|v| {
-                                                                FieldElementExpression::Number(v)
-                                                                    .into()
+                                                                BooleanExpression::Value(v).into()
                                                             })
                                                             .collect(),
                                                     )
-                                                    .annotate(
-                                                        Type::FieldElement,
-                                                        T::get_required_bits(),
-                                                    )
+                                                    .annotate(Type::Boolean, T::get_required_bits())
                                                     .into(),
                                                 )
                                             }
diff --git a/zokrates_core_test/tests/tests/arrays/fun_spread.zok b/zokrates_core_test/tests/tests/arrays/fun_spread.zok
index a62a95e0..0567ed73 100644
--- a/zokrates_core_test/tests/tests/arrays/fun_spread.zok
+++ b/zokrates_core_test/tests/tests/arrays/fun_spread.zok
@@ -1,7 +1,7 @@
 import "utils/pack/nonStrictUnpack256.zok" as unpack256
 
-def main(field[2] inputs) -> (field[512]):
+def main(field[2] inputs) -> (bool[512]):
 
-    field[512] preimage512 = [...unpack256(inputs[0]), ...unpack256(inputs[1])]
+    bool[512] preimage512 = [...unpack256(inputs[0]), ...unpack256(inputs[1])]
 
     return preimage512
\ No newline at end of file
diff --git a/zokrates_core_test/tests/tests/split_bls.zok b/zokrates_core_test/tests/tests/split_bls.zok
index 981da33a..924c5c6c 100644
--- a/zokrates_core_test/tests/tests/split_bls.zok
+++ b/zokrates_core_test/tests/tests/split_bls.zok
@@ -1,7 +1,7 @@
 import "EMBED/unpack"
 
-def main(field a) -> (field[255]):
+def main(field a) -> (bool[255]):
 	
-	field[255] b = unpack(a)
+	bool[255] b = unpack(a)
 
 	return b
diff --git a/zokrates_core_test/tests/tests/split_bn.zok b/zokrates_core_test/tests/tests/split_bn.zok
index 110ff5f1..253bdf09 100644
--- a/zokrates_core_test/tests/tests/split_bn.zok
+++ b/zokrates_core_test/tests/tests/split_bn.zok
@@ -1,7 +1,7 @@
 import "EMBED/unpack"
 
-def main(field a) -> (field[254]):
+def main(field a) -> (bool[254]):
 	
-	field[254] b = unpack(a)
+	bool[254] b = unpack(a)
 
 	return b
diff --git a/zokrates_stdlib/stdlib/ecc/edwardsCompress.zok b/zokrates_stdlib/stdlib/ecc/edwardsCompress.zok
index 15109f03..7cdf87df 100644
--- a/zokrates_stdlib/stdlib/ecc/edwardsCompress.zok
+++ b/zokrates_stdlib/stdlib/ecc/edwardsCompress.zok
@@ -7,14 +7,14 @@ import "utils/pack/nonStrictUnpack256" as unpack256
 // 	y = self.y.n
 // 	return int.to_bytes(y | ((x & 1) << 255), 32, "big")
 
-def main(field[2] pt)  -> (field[256]):
+def main(field[2] pt)  -> (bool[256]):
 	field x = pt[0]
 	field y = pt[1]
 
-	field[256] xBits = unpack256(x)
-	field[256] yBits = unpack256(y)
+	bool[256] xBits = unpack256(x)
+	bool[256] yBits = unpack256(y)
 
-	field sign = if xBits[255] == 1 then 1 else 0 fi
+	bool sign = xBits[255]
 	yBits[0] = sign
 
 	return yBits
diff --git a/zokrates_stdlib/stdlib/ecc/edwardsOrderCheck.zok b/zokrates_stdlib/stdlib/ecc/edwardsOrderCheck.zok
index fc1d342c..e85391bf 100644
--- a/zokrates_stdlib/stdlib/ecc/edwardsOrderCheck.zok
+++ b/zokrates_stdlib/stdlib/ecc/edwardsOrderCheck.zok
@@ -18,7 +18,7 @@ def main(field[2] pt, BabyJubJubParams context) -> (field):
     // Co-factor currently hard-coded to 8 for efficiency reasons
     // See discussion here: https://github.com/Zokrates/ZoKrates/pull/301#discussion_r267203391
     // Generic code:
-    // field[256] cofactorExponent = unpack256(cofactor)
+    // bool[256] cofactorExponent = unpack256(cofactor)
     // field[2] ptExp = multiply(cofactorExponent, pt, context)
     field[2] ptExp = add(pt, pt, context) // 2*pt
     ptExp = add(ptExp, ptExp, context)    // 4*pt
diff --git a/zokrates_stdlib/stdlib/ecc/edwardsScalarMult.zok b/zokrates_stdlib/stdlib/ecc/edwardsScalarMult.zok
index 1f47d8b8..413a7e69 100644
--- a/zokrates_stdlib/stdlib/ecc/edwardsScalarMult.zok
+++ b/zokrates_stdlib/stdlib/ecc/edwardsScalarMult.zok
@@ -8,7 +8,7 @@ from "ecc/babyjubjubParams" import BabyJubJubParams
 // curve parameters.
 // Note that the exponent array is not check to be boolean in this gadget
 // Reference: https://github.com/zcash-hackworks/sapling-crypto/blob/master/src/jubjub/fs.rs#L555
-def main(field[256] exponent, field[2] pt, BabyJubJubParams context) -> (field[2]):
+def main(bool[256] exponent, field[2] pt, BabyJubJubParams context) -> (field[2]):
 
     field[2] infinity = context.INFINITY
 
@@ -18,7 +18,7 @@ def main(field[256] exponent, field[2] pt, BabyJubJubParams context) -> (field[2
     for field i in 0..256 do
         field j = 255 - i
         field[2] candidateP = add(accumulatedP, doubledP, context)
-        accumulatedP = if exponent[j] == 1 then candidateP else accumulatedP fi
+        accumulatedP = if exponent[j] then candidateP else accumulatedP fi
         doubledP = add(doubledP, doubledP, context)
     endfor
 
diff --git a/zokrates_stdlib/stdlib/ecc/proofOfOwnership.zok b/zokrates_stdlib/stdlib/ecc/proofOfOwnership.zok
index a959ad55..730f2c5e 100644
--- a/zokrates_stdlib/stdlib/ecc/proofOfOwnership.zok
+++ b/zokrates_stdlib/stdlib/ecc/proofOfOwnership.zok
@@ -16,14 +16,14 @@ from "ecc/babyjubjubParams" import BabyJubJubParams
 ///    context: Curve parameters (including generator G) used to create keypair.
 ///
 /// Returns:
-///     Return 1 for pk/sk being a valid keypair, 0 otherwise.
-def main(field[2] pk, field sk, BabyJubJubParams context) -> (field):
+///     Return true for pk/sk being a valid keypair, false otherwise.
+def main(field[2] pk, field sk, BabyJubJubParams context) -> (bool):
 
     field[2] G = [context.Gu, context.Gv]
 
-    field[256] skBits = unpack256(sk)
+    bool[256] skBits = unpack256(sk)
     field[2] ptExp = multiply(skBits, G, context)
 
-    field out =	if ptExp[0] == pk[0] && ptExp[1] == pk[1] then 1 else 0 fi
+    bool out =	ptExp[0] == pk[0] && ptExp[1] == pk[1]
 
     return out
diff --git a/zokrates_stdlib/stdlib/hashes/pedersen/512bit.zok b/zokrates_stdlib/stdlib/hashes/pedersen/512bit.zok
index a1d18a85..148fa031 100644
--- a/zokrates_stdlib/stdlib/hashes/pedersen/512bit.zok
+++ b/zokrates_stdlib/stdlib/hashes/pedersen/512bit.zok
@@ -16,7 +16,7 @@ from "ecc/babyjubjubParams" import BabyJubJubParams
 // print(hasher.dsl_code)
 
 // 512bit to 256bit Pedersen hash using compression of the field elements
-def main(field[512] e) -> (field[256]):
+def main(bool[512] e) -> (bool[256]):
 	BabyJubJubParams context = context()
 	field[2] a = context.INFINITY //Infinity
 	//Round 0
@@ -700,9 +700,9 @@ def main(field[512] e) -> (field[256]):
 	cy = sel2([e[507], e[508]], [18191174947339798787646910619446409943766046946921136035021645191602921923040 , 16559060177998758852323304784771936179434931576336411584121379336820727372618, 13858115732979799183025726471151602712224733686530960054365665740611187232029, 9933192519609817862698304326029579651414877338671776883175639003837130283966])
 	a = add(a, [cx, cy], context)
 	//Round 170
-	cx = sel3s([e[510], e[511], 0], [3342564788366736273905106071612128667477972061160313630133110787799686301495 , 13766193863701503939885263345152684798552605679140222504700163745347162493183, 18523279471468319520962369406962457727155204375043681943707151819380964978377, 8094164074569624021939357073285075790695279643883973800173037824312344195506])
+	cx = sel3s([e[510], e[511], false], [3342564788366736273905106071612128667477972061160313630133110787799686301495 , 13766193863701503939885263345152684798552605679140222504700163745347162493183, 18523279471468319520962369406962457727155204375043681943707151819380964978377, 8094164074569624021939357073285075790695279643883973800173037824312344195506])
 	cy = sel2([e[510], e[511]], [2329094643034533408459502544740928833981119919633412709248656884170940780093 , 3216329736050668550647765981020076413548845117352735257893224753954595290363, 18710403072495673647060422294369054840513840567808020912157404388689648711093, 9785201456176703812798077455183487364035650707229293534561747881523562553649])
 	a = add(a, [cx, cy], context)
 
-	field[256] aC = edwardsCompress(a)
+	bool[256] aC = edwardsCompress(a)
 	return aC
diff --git a/zokrates_stdlib/stdlib/hashes/pedersen/6bit.zok b/zokrates_stdlib/stdlib/hashes/pedersen/6bit.zok
index 491b34c8..74d9e138 100644
--- a/zokrates_stdlib/stdlib/hashes/pedersen/6bit.zok
+++ b/zokrates_stdlib/stdlib/hashes/pedersen/6bit.zok
@@ -4,7 +4,7 @@ import "ecc/babyjubjubParams" as context
 from "ecc/babyjubjubParams" import BabyJubJubParams
 import "ecc/edwardsAdd" as add
 
-def main(field[6] e) -> (field[2]):
+def main(bool[6] e) -> (field[2]):
 	BabyJubJubParams context = context()
 
 	field[2] a = context.INFINITY //Infinity
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/1024bit.zok b/zokrates_stdlib/stdlib/hashes/sha256/1024bit.zok
index 949dba4c..1b729da4 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/1024bit.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/1024bit.zok
@@ -1,13 +1,13 @@
 import "./IVconstants" as IVconstants
 import "./shaRoundNoBoolCheck" as sha256
 
-// A function that takes 4 field[256] arrays as inputs
+// A function that takes 4 bool[256] arrays as inputs
 // and applies 2 rounds of sha256 compression.
-// It returns an array of 256 field elements.
-def main(field[256] a, field[256] b, field[256] c, field[256] d) -> (field[256]):
+// It returns an array of 256 bool.
+def main(bool[256] a, bool[256] b, bool[256] c, bool[256] d) -> (bool[256]):
 
-    field[256] IV =  IVconstants()
-    field[256] digest1 =  sha256(a, b, IV)
-    field[256] digest2 =  sha256(c, d, digest1)
+    bool[256] IV =  IVconstants()
+    bool[256] digest1 =  sha256(a, b, IV)
+    bool[256] digest2 =  sha256(c, d, digest1)
 
 	return digest2
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/1024bitPadded.zok b/zokrates_stdlib/stdlib/hashes/sha256/1024bitPadded.zok
index bc7e8192..0ad57333 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/1024bitPadded.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/1024bitPadded.zok
@@ -1,15 +1,15 @@
 import "./1536bit" as sha256
-// Take two field[256] arrays as input
-// and returns their sha256 full round output as an array of 256 field elements.
-def main(field[256] a, field[256] b, field[256] c, field[256] d) -> (field[256]):
+// Take two bool[256] arrays as input
+// and returns their sha256 full round output as an array of 256 bool.
+def main(bool[256] a, bool[256] b, bool[256] c, bool[256] d) -> (bool[256]):
 
     // Hash is computed on the full 1024bit block size
     // padding does not fit in the first two blocks
     // add dummy block (single "1" followed by "0" + total length)
-    field[256] dummyblock1 = [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    bool[256] dummyblock1 = [true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
     // total length of message is 1024 bits: 0b10000000000
-    field[256] dummyblock2 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    bool[256] dummyblock2 = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false, false]
 
-    field[256] digest = sha256(a, b, c, d, dummyblock1, dummyblock2)
+    bool[256] digest = sha256(a, b, c, d, dummyblock1, dummyblock2)
 
     return digest
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/1536bit.zok b/zokrates_stdlib/stdlib/hashes/sha256/1536bit.zok
index ce679f33..b037f967 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/1536bit.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/1536bit.zok
@@ -1,14 +1,14 @@
 import "./IVconstants" as IVconstants
 import "./shaRoundNoBoolCheck" as sha256
 
-// A function that takes 6 field[256] arrays as inputs
+// A function that takes 6 bool[256] arrays as inputs
 // and applies 3 rounds of sha256 compression.
-// It returns an array of 256 field elements.
-def main(field[256] a, field[256] b, field[256] c, field[256] d, field[256] e, field[256] f) -> (field[256]):
+// It returns an array of 256 bool.
+def main(bool[256] a, bool[256] b, bool[256] c, bool[256] d, bool[256] e, bool[256] f) -> (bool[256]):
 
-    field[256] IV =  IVconstants()
-    field[256] digest1 =  sha256(a, b, IV)
-    field[256] digest2 =  sha256(c, d, digest1)
-    field[256] digest3 =  sha256(e, f, digest2)
+    bool[256] IV =  IVconstants()
+    bool[256] digest1 =  sha256(a, b, IV)
+    bool[256] digest2 =  sha256(c, d, digest1)
+    bool[256] digest3 =  sha256(e, f, digest2)
 
 	return digest3
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/256bitPadded.zok b/zokrates_stdlib/stdlib/hashes/sha256/256bitPadded.zok
index 7a143dd7..fcbb97c6 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/256bitPadded.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/256bitPadded.zok
@@ -1,13 +1,13 @@
 import "./512bit" as sha256
 
-// A function that takes 1 field[256] array as input
-// and returns the sha256 full round output as an array of 256 field elements.
-def main(field[256] a) -> (field[256]):
+// A function that takes 1 bool[256] array as input
+// and returns the sha256 full round output as an array of 256 bool.
+def main(bool[256] a) -> (bool[256]):
 
     // Hash is computed on 256 bits of input
     // padding fits in the remaining 256 bits of the first block
     // add dummy block (single "1" followed by "0" + total length)
-    field[256] dummyblock1 = [ \
+    bool[256] dummyblock1 = [ \
         1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/512bit.zok b/zokrates_stdlib/stdlib/hashes/sha256/512bit.zok
index a353f43b..422dd047 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/512bit.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/512bit.zok
@@ -1,15 +1,15 @@
 import "./IVconstants" as IVconstants
 import "./shaRoundNoBoolCheck" as sha256
 
-// A function that takes 2 field[256] arrays as inputs
-// and returns their sha256 compression function as an array of 256 field elements.
+// A function that takes 2 bool[256] arrays as inputs
+// and returns their sha256 compression function as an array of 256 bool.
 // In contrast to full_round.zok no padding is being applied
-def main(field[256] a, field[256] b) -> (field[256]):
+def main(bool[256] a, bool[256] b) -> (bool[256]):
 
     // a and b is NOT checked to be of type bool
 
-    field[256] IV = IVconstants()
-    field[256] digest =  sha256(a, b, IV)
+    bool[256] IV = IVconstants()
+    bool[256] digest =  sha256(a, b, IV)
     //digest is constraint to be of type bool
 
     return digest
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/512bitPacked.zok b/zokrates_stdlib/stdlib/hashes/sha256/512bitPacked.zok
index 00bc9894..3eb82203 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/512bitPacked.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/512bitPacked.zok
@@ -6,15 +6,15 @@ import "./512bitPadded" as sha256
 // It then returns an array of two field elements, each representing 128 bits of the result.
 def main(field[4] preimage) -> (field[2]):
 
-    field[128] a = unpack128(preimage[0])
-    field[128] b = unpack128(preimage[1])
-    field[128] c = unpack128(preimage[2])
-    field[128] d = unpack128(preimage[3])
+    bool[128] a = unpack128(preimage[0])
+    bool[128] b = unpack128(preimage[1])
+    bool[128] c = unpack128(preimage[2])
+    bool[128] d = unpack128(preimage[3])
 
-    field[256] lhs = [...a, ...b]
-    field[256] rhs = [...c, ...d]
+    bool[256] lhs = [...a, ...b]
+    bool[256] rhs = [...c, ...d]
 
-    field[256] r = sha256(lhs, rhs)
+    bool[256] r = sha256(lhs, rhs)
 
     field res0 = pack128(r[..128])
     field res1 = pack128(r[128..])
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/512bitPadded.zok b/zokrates_stdlib/stdlib/hashes/sha256/512bitPadded.zok
index 17a7353a..7c195915 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/512bitPadded.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/512bitPadded.zok
@@ -1,16 +1,17 @@
 import "./1024bit" as sha256
 
-// A function that takes 2 field[256] arrays as inputs
-// and returns their sha256 full round output as an array of 256 field elements.
-def main(field[256] a, field[256] b) -> (field[256]):
+// A function that takes 2 bool[256] arrays as inputs
+// and returns their sha256 full round output as an array of 256 bool.
+def main(bool[256] a, bool[256] b) -> (bool[256]):
 
     // Hash is computed on the full 512bit block size
     // padding does not fit in the primary block
     // add dummy block (single "1" followed by "0" + total length)
-    field[256] dummyblock1 = [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-    // total length of message is 512 bits: 0b1000000000
-    field[256] dummyblock2 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    bool[256] dummyblock1 = [true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
 
-    field[256] digest = sha256(a, b, dummyblock1, dummyblock2)
+    // total length of message is 512 bits: 0b1000000000
+    bool[256] dummyblock2 = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false]
+
+    bool[256] digest = sha256(a, b, dummyblock1, dummyblock2)
 
     return digest
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/IVconstants.zok b/zokrates_stdlib/stdlib/hashes/sha256/IVconstants.zok
index 680b4da5..20340d8d 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/IVconstants.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/IVconstants.zok
@@ -1,15 +1,15 @@
 // SHA-256 is specified in FIPS 180-3 and initial values are listed in section 5.3.3
 // https://csrc.nist.gov/csrc/media/publications/fips/180/3/archive/2008-10-31/documents/fips180-3_final.pdf
-def main() -> (field[256]):
-	field[32] h0 = [0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1]
-	field[32] h1 = [1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1]
-	field[32] h2 = [0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 0]
-	field[32] h3 = [1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0]
-	field[32] h4 = [0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1]
-	field[32] h5 = [1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0]
-	field[32] h6 = [0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1]
-	field[32] h7 = [0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1]
+def main() -> (bool[256]):
+	bool[32] h0 = [false, true, true, false, true, false, true, false, false, false, false, false, true, false, false, true, true, true, true, false, false, true, true, false, false, true, true, false, false, true, true, true]
+	bool[32] h1 = [true, false, true, true, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, true, true, true, false, true, false, false, false, false, true, false, true]
+	bool[32] h2 = [false, false, true, true, true, true, false, false, false, true, true, false, true, true, true, false, true, true, true, true, false, false, true, true, false, true, true, true, false, false, true, false]
+	bool[32] h3 = [true, false, true, false, false, true, false, true, false, true, false, false, true, true, true, true, true, true, true, true, false, true, false, true, false, false, true, true, true, false, true, false]
+	bool[32] h4 = [false, true, false, true, false, false, false, true, false, false, false, false, true, true, true, false, false, true, false, true, false, false, true, false, false, true, true, true, true, true, true, true]
+	bool[32] h5 = [true, false, false, true, true, false, true, true, false, false, false, false, false, true, false, true, false, true, true, false, true, false, false, false, true, false, false, false, true, true, false, false]
+	bool[32] h6 = [false, false, false, true, true, true, true, true, true, false, false, false, false, false, true, true, true, true, false, true, true, false, false, true, true, false, true, false, true, false, true, true]
+	bool[32] h7 = [false, true, false, true, true, false, true, true, true, true, true, false, false, false, false, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, false, true]
 
-	field[256] IV = [...h0, ...h1, ...h2, ...h3, ...h4, ...h5, ...h6, ...h7]
+	bool[256] IV = [...h0, ...h1, ...h2, ...h3, ...h4, ...h5, ...h6, ...h7]
 	
 	return IV
diff --git a/zokrates_stdlib/stdlib/hashes/sha256/shaRoundNoBoolCheck.zok b/zokrates_stdlib/stdlib/hashes/sha256/shaRoundNoBoolCheck.zok
index c89f7dd4..b5a85663 100644
--- a/zokrates_stdlib/stdlib/hashes/sha256/shaRoundNoBoolCheck.zok
+++ b/zokrates_stdlib/stdlib/hashes/sha256/shaRoundNoBoolCheck.zok
@@ -2,5 +2,5 @@ import "EMBED/sha256round" as sha256round
 // a and b is NOT checked to be 0 or 1
 // the return value is checked to be 0 or 1
 // IV vector is checked to be of type bool
-def main(field[256] a, field[256] b, field[256] IV) -> (field[256]):
+def main(bool[256] a, bool[256] b, bool[256] IV) -> (bool[256]):
 	return sha256round([...a, ...b], IV)
diff --git a/zokrates_stdlib/stdlib/hashes/utils/256bitsDirectionHelper.zok b/zokrates_stdlib/stdlib/hashes/utils/256bitsDirectionHelper.zok
index 4e61b5db..2d4ba181 100644
--- a/zokrates_stdlib/stdlib/hashes/utils/256bitsDirectionHelper.zok
+++ b/zokrates_stdlib/stdlib/hashes/utils/256bitsDirectionHelper.zok
@@ -1,2 +1,2 @@
-def main(field selector, field[256] lhs, field[256] rhs) -> (field[512]):
-	return if selector == 0 then [...lhs, ...rhs] else [...rhs, ...lhs] fi
\ No newline at end of file
+def main(bool selector, bool[256] lhs, bool[256] rhs) -> (bool[512]):
+	return if selector then [...rhs, ...lhs] else [...lhs, ...rhs] fi
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/signatures/verifyEddsa.zok b/zokrates_stdlib/stdlib/signatures/verifyEddsa.zok
index 6c553ad4..ec0e6f6d 100644
--- a/zokrates_stdlib/stdlib/signatures/verifyEddsa.zok
+++ b/zokrates_stdlib/stdlib/signatures/verifyEddsa.zok
@@ -26,8 +26,8 @@ from "ecc/babyjubjubParams" import BabyJubJubParams
 ///    context: Curve parameters used to create S.
 ///
 /// Returns:
-///     Return 1 for S being a valid EdDSA Signature, 0 otherwise.
-def main(private field[2] R, private field S, field[2] A, field[256] M0, field[256] M1, BabyJubJubParams context) -> (field):
+///     Return true for S being a valid EdDSA Signature, false otherwise.
+def main(private field[2] R, private field S, field[2] A, bool[256] M0, bool[256] M1, BabyJubJubParams context) -> (bool):
 
     field[2] G = [context.Gu, context.Gv]
 
@@ -36,16 +36,16 @@ def main(private field[2] R, private field S, field[2] A, field[256] M0, field[2
     field isPrimeOrder = orderCheck(R, context)
     1 == isPrimeOrder	
 
-    field[256] Rx = unpack256(R[0])
-    field[256] Ax = unpack256(A[0])
-    field[256] hRAM = sha256(Rx, Ax, M0, M1)
+    bool[256] Rx = unpack256(R[0])
+    bool[256] Ax = unpack256(A[0])
+    bool[256] hRAM = sha256(Rx, Ax, M0, M1)
 
-    field[256] sBits = unpack256(S)
+    bool[256] sBits = unpack256(S)
     field[2] lhs = scalarMult(sBits, G, context)
 
     field[2] AhRAM = scalarMult(hRAM, A, context)
     field[2] rhs = add(R, AhRAM, context)
 
-    field out = if rhs[0] == lhs[0] && rhs[1] == lhs[1] then 1 else 0 fi
+    bool out = rhs[0] == lhs[0] && rhs[1] == lhs[1]
 
     return out
diff --git a/zokrates_stdlib/stdlib/utils/binary/and.zok b/zokrates_stdlib/stdlib/utils/binary/and.zok
deleted file mode 100644
index abb504fa..00000000
--- a/zokrates_stdlib/stdlib/utils/binary/and.zok
+++ /dev/null
@@ -1,3 +0,0 @@
-// AND
-def main(field x, field y) -> (field):
-	return x * y
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/binary/isbool.zok b/zokrates_stdlib/stdlib/utils/binary/isbool.zok
deleted file mode 100644
index 36839018..00000000
--- a/zokrates_stdlib/stdlib/utils/binary/isbool.zok
+++ /dev/null
@@ -1,3 +0,0 @@
-def main(field a) -> (field):
-	0 == (a-1)*a
-	return 1
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/binary/not.zok b/zokrates_stdlib/stdlib/utils/binary/not.zok
deleted file mode 100644
index d34397fa..00000000
--- a/zokrates_stdlib/stdlib/utils/binary/not.zok
+++ /dev/null
@@ -1,3 +0,0 @@
-// NOT
-def main(field x) -> (field):
-	return 1 - x
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/binary/or.zok b/zokrates_stdlib/stdlib/utils/binary/or.zok
deleted file mode 100644
index a06088ac..00000000
--- a/zokrates_stdlib/stdlib/utils/binary/or.zok
+++ /dev/null
@@ -1,7 +0,0 @@
-// OR
-
-import "./and" as AND
-import "./not" as NOT
-
-def main(field x, field y) -> (field):
-	return NOT(AND(NOT(x), NOT(y)))
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/binary/xor.zok b/zokrates_stdlib/stdlib/utils/binary/xor.zok
deleted file mode 100644
index 05fd8f08..00000000
--- a/zokrates_stdlib/stdlib/utils/binary/xor.zok
+++ /dev/null
@@ -1,4 +0,0 @@
-// XOR
-
-def main(field x, field y) -> (field):
-	return x + y - 2 * x * y
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/casts/1024to256array.zok b/zokrates_stdlib/stdlib/utils/casts/1024to256array.zok
index 8663a5ed..8f6d40c1 100644
--- a/zokrates_stdlib/stdlib/utils/casts/1024to256array.zok
+++ b/zokrates_stdlib/stdlib/utils/casts/1024to256array.zok
@@ -1,3 +1,3 @@
-def main(field[1024] input) -> (field[256], field[256], field[256], field[256]):
+def main(bool[1024] input) -> (bool[256], bool[256], bool[256], bool[256]):
 
   return input[0..256], input[256..512], input[512..768], input[768..1024]
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/multiplexer/256bit.zok b/zokrates_stdlib/stdlib/utils/multiplexer/256bit.zok
index 6265cd20..30fa993c 100644
--- a/zokrates_stdlib/stdlib/utils/multiplexer/256bit.zok
+++ b/zokrates_stdlib/stdlib/utils/multiplexer/256bit.zok
@@ -1,2 +1,2 @@
-def main(field selector, field[256] lhs, field[256] rhs) -> (field[256]):
-	return if selector == 0 then lhs else rhs fi
\ No newline at end of file
+def main(bool selector, bool[256] lhs, bool[256] rhs) -> (bool[256]):
+	return if selector then rhs else lhs fi
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/multiplexer/2bit.zok b/zokrates_stdlib/stdlib/utils/multiplexer/2bit.zok
index 9dc17277..3b910b6b 100644
--- a/zokrates_stdlib/stdlib/utils/multiplexer/2bit.zok
+++ b/zokrates_stdlib/stdlib/utils/multiplexer/2bit.zok
@@ -1,2 +1,2 @@
-def main(field selector, field[2] lhs, field[2] rhs) -> (field[2]):
-	return if selector == 0 then lhs else rhs fi
\ No newline at end of file
+def main(bool selector, bool[2] lhs, bool[2] rhs) -> (bool[2]):
+	return if selector then rhs else lhs fi
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/multiplexer/lookup1bit.zok b/zokrates_stdlib/stdlib/utils/multiplexer/lookup1bit.zok
index 716aa767..00abfc69 100644
--- a/zokrates_stdlib/stdlib/utils/multiplexer/lookup1bit.zok
+++ b/zokrates_stdlib/stdlib/utils/multiplexer/lookup1bit.zok
@@ -1,8 +1,8 @@
 // /**
 // * One-bit window lookup table using one constraint
 // */
-def main(field selector, field[2] target) -> (field):
+def main(bool selector, field[2] target) -> (field):
 
-	field out = target[0] + selector*target[1] - selector*target[0]
+	field out = if selector then target[1] else target[0] fi
 
   return out
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/multiplexer/lookup2bit.zok b/zokrates_stdlib/stdlib/utils/multiplexer/lookup2bit.zok
index 8e833865..fcfc2b16 100644
--- a/zokrates_stdlib/stdlib/utils/multiplexer/lookup2bit.zok
+++ b/zokrates_stdlib/stdlib/utils/multiplexer/lookup2bit.zok
@@ -2,9 +2,9 @@
 // * Two-bit window lookup table using one constraint
 // * Maps the bits `b` to a list of constant `c`
 // */
-def main(field[2] b, field[4] c) -> (field):
+def main(bool[2] b, field[4] c) -> (field):
 
-	field alpha = c[1] - c[0] + (b[1] * (c[3] - c[2] - c[1] + c[0]))
-	field out = alpha*b[0] + c[0] - (b[1] * (0 - c[2] + c[0]))
+	field alpha = c[1] - c[0] + if b[1] then (c[3] - c[2] - c[1] + c[0]) else 0 fi
+	field out = if b[0] then alpha else 0 fi + c[0] - (if b[1] then (0 - c[2] + c[0]) else 0 fi)
 
 	return out
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/multiplexer/lookup3bitSigned.zok b/zokrates_stdlib/stdlib/utils/multiplexer/lookup3bitSigned.zok
index 355e70a9..db4c3bd6 100644
--- a/zokrates_stdlib/stdlib/utils/multiplexer/lookup3bitSigned.zok
+++ b/zokrates_stdlib/stdlib/utils/multiplexer/lookup3bitSigned.zok
@@ -3,9 +3,9 @@ import "./lookup2bit" as lookup
 // * Three-bit window lookup (2bits + signature bit) in 2bit table
 // * using two constraints. Maps the bits `b` to a list of constants `c`
 // */
-def main(field[3] b, field[4] c) -> (field):
+def main(bool[3] b, field[4] c) -> (field):
 
 	field alpha = lookup([b[0], b[1]], c)
-	field out = alpha - 2*b[2]*alpha
+	field out = alpha - 2 * if b[2] then alpha else 0 fi
 	
 	return out
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/pack/nonStrictUnpack256.zok b/zokrates_stdlib/stdlib/utils/pack/nonStrictUnpack256.zok
index d62aef44..95a64d10 100644
--- a/zokrates_stdlib/stdlib/utils/pack/nonStrictUnpack256.zok
+++ b/zokrates_stdlib/stdlib/utils/pack/nonStrictUnpack256.zok
@@ -6,8 +6,8 @@
 
 import "EMBED/unpack" as unpack
 
-def main(field i) -> (field[256]):
+def main(field i) -> (bool[256]):
 
-    field[254] b = unpack(i)
+    bool[254] b = unpack(i)
 
-	return [0, 0, ...b]
+	return [false, false, ...b]
diff --git a/zokrates_stdlib/stdlib/utils/pack/pack128.zok b/zokrates_stdlib/stdlib/utils/pack/pack128.zok
index d17066be..4c6f0adb 100644
--- a/zokrates_stdlib/stdlib/utils/pack/pack128.zok
+++ b/zokrates_stdlib/stdlib/utils/pack/pack128.zok
@@ -1,10 +1,10 @@
-def main(field[128] bits) -> (field):
+def main(bool[128] bits) -> (field):
 
 	field out = 0
 
 	for field j in 0..128 do
 		field i = 128 - (j + 1)
-		out = out + bits[i] * (2 ** j)
+		out = out + if bits[i] then (2 ** j) else 0 fi
 	endfor
 
     return out
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/pack/pack256.zok b/zokrates_stdlib/stdlib/utils/pack/pack256.zok
index bb0aee52..7c5e3129 100644
--- a/zokrates_stdlib/stdlib/utils/pack/pack256.zok
+++ b/zokrates_stdlib/stdlib/utils/pack/pack256.zok
@@ -1,10 +1,10 @@
-def main(field[256] bits) -> (field):
+def main(bool[256] bits) -> (field):
 
 	field out = 0
 
 	for field j in 0..256 do
 		field i = 256 - (j + 1)
-		out = out + bits[i] * (2 ** j)
+		out = out + if bits[i] then (2 ** j) else 0 fi
 	endfor
 
     return out
\ No newline at end of file
diff --git a/zokrates_stdlib/stdlib/utils/pack/unpack128.zok b/zokrates_stdlib/stdlib/utils/pack/unpack128.zok
index d299d389..7d3a3ce2 100644
--- a/zokrates_stdlib/stdlib/utils/pack/unpack128.zok
+++ b/zokrates_stdlib/stdlib/utils/pack/unpack128.zok
@@ -2,10 +2,10 @@
 
 import "EMBED/unpack" as unpack
 
-def main(field i) -> (field[128]):
+def main(field i) -> (bool[128]):
 
-    field[254] b = unpack(i)
+    bool[254] b = unpack(i)
 
-    b[0..126] == [0; 126]
+    b[0..126] == [false; 126]
 
     return b[126..254]
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/and.json b/zokrates_stdlib/tests/tests/and.json
deleted file mode 100644
index bfa30320..00000000
--- a/zokrates_stdlib/tests/tests/and.json
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-	"entry_point": "./stdlib/utils/binary/and.zok",
-	"curves": ["Bn128"],
-	"tests": [
-		{
-			"input": {
-				"values": ["0", "0"]
-			},
-			"output": {
-				"Ok": {
-					"values": ["0"]
-				}
-			}
-		}
-	]
-}
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/ecc/edwardsCompress.zok b/zokrates_stdlib/tests/tests/ecc/edwardsCompress.zok
index b5161097..c13e36d5 100644
--- a/zokrates_stdlib/tests/tests/ecc/edwardsCompress.zok
+++ b/zokrates_stdlib/tests/tests/ecc/edwardsCompress.zok
@@ -10,9 +10,9 @@ def testCompress() -> (field):
 	field Gu = context.Gu
 	field Gv = context.Gv
 
-	field[256] Gcompressed = edwardsCompress([Gu, Gv])
+	bool[256] Gcompressed = edwardsCompress([Gu, Gv])
 
-	Gcompressed == [1,0,1,0,1,1,1,0,0,0,0,0,0,1,1,1,0,0,1,0,1,0,0,1,0,1,1,1,1,1,1,1,1,0,0,0,1,1,0,1,0,0,1,1,1,1,0,0,0,0,1,1,1,1,0,1,0,1,1,1,1,0,0,0,0,0,0,1,1,0,0,0,1,1,0,1,1,0,1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,0,1,1,0,0,0,0,1,1,0,1,0,1,0,1,0,1,1,0,0,0,0,0,1,1,1,1,1,1,1,0,0,1,1,0,1,0,1,0,0,1,1,1,0,1,0,1,0,0,1,1,1,0,1,1,0,1,0,0,0,0,1,1,0,0,1,0,1,1,0,0,0,0,1,1,0,0,0,0,0,1,1,1,0,1,0,0,0,1,0,0,1,1,0,1,0,0,1,0,0,0,1,1,0,1,1,1,0,1,1,0,0,0,1,1,1,1,0,1,1,1,1,1,1,1,1,0,0,1,1,0,0,1,0,0,0,1,0,1,0,1,0,0,1,0,1,1,0,1,0,1,1,1]
+	Gcompressed == [true, false, true, false, true, true, true, false, false, false, false, false, false, true, true, true, false, false, true, false, true, false, false, true, false, true, true, true, true, true, true, true, true, false, false, false, true, true, false, true, false, false, true, true, true, true, false, false, false, false, true, true, true, true, false, true, false, true, true, true, true, false, false, false, false, false, false, true, true, false, false, false, true, true, false, true, true, false, true, true, true, true, false, true, true, true, false, true, true, true, true, true, true, true, false, true, false, false, true, false, false, true, false, false, true, true, false, false, false, false, true, true, false, true, false, true, false, true, false, true, true, false, false, false, false, false, true, true, true, true, true, true, true, false, false, true, true, false, true, false, true, false, false, true, true, true, false, true, false, true, false, false, true, true, true, false, true, true, false, true, false, false, false, false, true, true, false, false, true, false, true, true, false, false, false, false, true, true, false, false, false, false, false, true, true, true, false, true, false, false, false, true, false, false, true, true, false, true, false, false, true, false, false, false, true, true, false, true, true, true, false, true, true, false, false, false, true, true, true, true, false, true, true, true, true, true, true, true, true, false, false, true, true, false, false, true, false, false, false, true, false, true, false, true, false, false, true, false, true, true, false, true, false, true, true, true]
 
 	return 1
 
diff --git a/zokrates_stdlib/tests/tests/ecc/edwardsScalarMult.zok b/zokrates_stdlib/tests/tests/ecc/edwardsScalarMult.zok
index 12598615..8fa9415b 100644
--- a/zokrates_stdlib/tests/tests/ecc/edwardsScalarMult.zok
+++ b/zokrates_stdlib/tests/tests/ecc/edwardsScalarMult.zok
@@ -9,7 +9,8 @@ def testCyclic() -> (field):
 	field[2] G = [context.Gu, context.Gv]
 
 	// exp = JUBJUB_E + 1
-	field[256] exp = [0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1]
+	bool[256] exp = [false, false, true, true, false, false, false, false, false, true, true, false, false, true, false, false, false, true, false, false, true, true, true, false, false, true, true, true, false, false, true, false, true, true, true, false, false, false, false, true, false, false, true, true, false, false, false, true, true, false, true, false, false, false, false, false, false, false, true, false, true, false, false, true, true, false, true, true, true, false, false, false, false, true, false, true, false, false, false, false, false, true, false, false, false, true, false, true, true, false, true, true, false, true, true, false, true, false, false, false, false, false, false, true, true, false, false, false, false, false, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, false, true, false, true, false, true, true, false, false, true, true, true, true, true, false, true, true, true, false, true, true, false, true, true, false, true, true, true, false, false, false, false, false, true, true, true, false, false, true, false, false, true, false, false, false, false, false, true, true, true, false, true, true, true, false, false, false, false, false, true, false, true, false, false, true, true, false, false, true, true, true, false, true, true, true, false, false, true, false, true, false, false, true, false, true, true, true, true, true, false, true, true, true, false, false, false, false, true, true, true, false, false, true, false, false, true, false, false, false, false, true, false, false, true, false, false, true, true, false, true, true, true, true, false, false, false, true, false, false, true]
+
 	field[2] out = mul(exp, G, context)
 	
 	G == out
@@ -21,7 +22,7 @@ def testMul2() -> (field):
 	field[2] G = [context.Gu, context.Gv]
 	
 	// exp == 2
-	field[256] exp = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0]
+	bool[256] exp = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false]
 	field[2] out = mul(exp, G, context)
 	
 	out[0] == 17324563846726889236817837922625232543153115346355010501047597319863650987830
@@ -34,11 +35,13 @@ def testAssociativity() -> (field):
 	field[2] G = [context.Gu, context.Gv]
 
 	// a = 1234
-	field[256] a = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0]
+	bool[256] a = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, true, true, false, true, false, false, true, false]
+
 	// b = 5678
-	field[256] b = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0]
+	bool[256] b = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true, true, false, false, false, true, false, true, true, true, false]
 	// c = 7890
-	field[256] c = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0]
+	bool[256] c = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, true, true, true, false, true, true, false, true, false, false, true, false]
+
 
 	field[2] Ga = mul(a, G, context)
 	field[2] Gab = mul(b, Ga, context)
@@ -63,11 +66,12 @@ def testMultiplicative() -> (field):
 	field[2] G = [context.Gu, context.Gv]
 
 	// a = 1234
-	field[256] a = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0]
+	bool[256] a = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, true, true, false, true, false, false, true, false]
 	// b = 5678
-	field[256] b = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0]
+	bool[256] b = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true, true, false, false, false, true, false, true, true, true, false]
+
 	// ab = a*b = 7006652
-	field[256] ab = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0]
+	bool[256] ab = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, true, false, true, false, true, false, true, true, true, false, true, false, false, true, true, false, true, true, true, true, false, false]
 
 	field[2] Ga = mul(a, G, context)
 	field[2] Gb = mul(b, G, context)
diff --git a/zokrates_stdlib/tests/tests/ecc/proofOfOwnership.zok b/zokrates_stdlib/tests/tests/ecc/proofOfOwnership.zok
index 9c0e7654..3be541c1 100644
--- a/zokrates_stdlib/tests/tests/ecc/proofOfOwnership.zok
+++ b/zokrates_stdlib/tests/tests/ecc/proofOfOwnership.zok
@@ -13,9 +13,9 @@ def testOwnershipTrue() -> (field):
 	field[2] Pk = [14897476871502190904409029696666322856887678969656209656241038339251270171395, 16668832459046858928951622951481252834155254151733002984053501254009901876174]
 	field sk =  1997011358982923168928344992199991480689546837621580239342656433234255379025
 
-	field out = proofOfOwnership(Pk, sk, context)
+	bool out = proofOfOwnership(Pk, sk, context)
 
-	out == 1
+	out == true
 	return 1
 
 def testtOwnershipFalse() -> (field):
@@ -23,9 +23,9 @@ def testtOwnershipFalse() -> (field):
 
 	field[2] Pk = [16328093915569409528980874702678312730273137210288183490878184636452430630129, 9377227749598842756429258362864743065769435972445705966557343775367597326529]
 	field sk = 1997011358982923168928344992199991480689546837621580239342656433234255379025
-	field out = proofOfOwnership(Pk, sk, context)
+	bool out = proofOfOwnership(Pk, sk, context)
 
-	out == 0
+	out == false
 	return 1
 
 def main() -> (field):
diff --git a/zokrates_stdlib/tests/tests/hashes/pedersen/512bit.zok b/zokrates_stdlib/tests/tests/hashes/pedersen/512bit.zok
index f79800b5..9e281330 100644
--- a/zokrates_stdlib/tests/tests/hashes/pedersen/512bit.zok
+++ b/zokrates_stdlib/tests/tests/hashes/pedersen/512bit.zok
@@ -16,8 +16,10 @@ import "hashes/pedersen/512bit" as pedersen
 
 def main() -> (field):
 	
-	field[512] e = [0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1]
-	field[256] d = pedersen(e)
+	bool[512] e = [false, false, false, true, false, true, true, true, true, true, false, true, false, false, true, false, true, true, true, false, false, true, true, false, true, true, false, true, true, false, false, true, false, true, false, true, true, true, false, false, false, true, true, true, false, true, false, false, true, true, true, false, true, false, false, true, false, true, true, true, true, true, false, false, false, true, false, false, true, false, true, true, true, true, true, true, false, true, true, false, false, false, false, false, true, true, false, false, true, true, false, false, false, false, false, false, true, true, false, false, false, true, true, false, true, false, true, false, false, true, true, false, true, false, true, true, false, true, false, false, false, false, false, true, false, true, true, true, true, false, true, true, true, false, true, false, true, true, true, true, true, true, false, false, false, true, false, true, false, true, false, false, true, true, true, false, true, false, false, true, false, false, true, false, false, false, false, false, false, true, false, true, true, true, false, false, true, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false, true, false, false, true, true, false, false, false, false, true, true, true, true, true, false, true, false, false, false, false, true, false, false, true, false, false, false, true, false, false, true, false, false, true, false, true, true, false, false, false, true, true, false, true, false, false, true, true, false, true, false, true, true, false, true, true, false, true, true, true, true, true, true, false, false, false, true, true, true, false, false, true, true, true, true, true, true, true, false, true, false, true, true, true, true, false, false, false, false, false, false, true, true, false, false, true, true, false, true, false, true, false, false, false, true, false, true, false, false, true, false, true, true, false, true, true, true, false, true, true, false, false, true, true, true, true, false, false, false, true, true, true, false, true, true, true, false, false, false, false, false, true, true, false, false, false, false, false, true, true, true, false, false, false, true, true, false, false, false, true, true, true, true, false, false, true, false, false, false, true, true, true, false, false, true, false, false, false, true, true, true, true, false, true, false, true, true, false, true, false, true, true, true, false, true, true, true, false, true, false, false, true, true, true, true, false, true, true, false, false, true, false, true, false, false, false, true, true, false, false, true, true, false, false, true, false, false, false, false, true, false, false, false, false, false, false, false, false, true, true, true, true, false, false, false, true, true, false, false, false, true, false, false, true, true, true, false, false, true, false, false, true, false, true, true, false, true, false, true, true, false, false, false, false, false, false, true, false, true, false, false, false, true, false, false, false, true, true, false, false, false, true, true, false, true, false, true, true, false, false, false, true, false, true, false, true, false, false, false, false, false, false, false, true, true, true, true, true]
 
-	d == [0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1]
+	bool[256] d = pedersen(e)
+
+	d == [false, false, false, false, false, true, true, false, true, true, false, true, true, true, true, true, true, false, true, false, true, true, false, false, true, false, true, false, false, false, false, false, true, true, false, true, true, false, false, false, false, false, true, false, true, true, false, false, false, false, false, false, false, true, true, true, true, false, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, true, true, true, true, false, false, false, false, true, true, true, true, false, true, true, false, false, true, false, true, true, true, true, false, true, true, false, false, true, true, false, false, true, false, true, false, false, true, true, false, false, false, true, true, false, false, false, false, false, false, false, false, false, true, false, true, false, false, true, true, true, true, true, false, true, true, true, true, false, false, false, true, false, false, true, true, true, true, true, false, false, false, true, false, true, true, false, true, false, false, false, true, false, false, true, false, false, true, false, false, false, false, true, true, false, false, false, true, false, false, true, false, false, true, false, false, true, true, false, false, false, true, false, true, false, false, true, true, true, true, true, false, false, false, true, false, true, false, false, true, true, false, true, false, true, true, true, false, false, false, false, false, false, true, false, true, false, true, false, false, false, true, false, true, false, false, false, false, false, true, false, true, false, false, false, false, false, false, false, true, false, true, true]
+	
 	return 1
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/hashes/pedersen/6bit.zok b/zokrates_stdlib/tests/tests/hashes/pedersen/6bit.zok
index 0a12a61e..d81c875e 100644
--- a/zokrates_stdlib/tests/tests/hashes/pedersen/6bit.zok
+++ b/zokrates_stdlib/tests/tests/hashes/pedersen/6bit.zok
@@ -10,7 +10,7 @@ import "hashes/pedersen/6bit" as pedersen
 
 def main() -> (field):
 	
-	field[6] e = [1, 1, 0, 0, 0, 0]
+	bool[6] e = [true, true, false, false, false, false]
 	field[2] d = pedersen(e)
 
 	5483803361072598088157572477433311028290255512997784196805059543720485966024 == d[0]
diff --git a/zokrates_stdlib/tests/tests/hashes/sha256/1024bitPadded.zok b/zokrates_stdlib/tests/tests/hashes/sha256/1024bitPadded.zok
index a4748e75..0a8066ee 100644
--- a/zokrates_stdlib/tests/tests/hashes/sha256/1024bitPadded.zok
+++ b/zokrates_stdlib/tests/tests/hashes/sha256/1024bitPadded.zok
@@ -17,13 +17,13 @@
 import "hashes/sha256/1024bitPadded" as sha256
 def main() -> (field):
 
-	field[256] a = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-	field[256] b = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-	field[256] c = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-	field[256] d = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
+	bool[256] a = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
+	bool[256] b = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
+	bool[256] c = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
+	bool[256] d = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true]
 
-	field[256] digest = sha256(a, b, c, d)
+	bool[256] digest = sha256(a, b, c, d)
 
-	digest == [1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1]
+	digest == [true, true, true, false, true, true, true, true, true, false, true, false, false, true, false, false, false, false, false, true, true, true, false, false, true, false, true, false, false, true, false, false, true, false, true, false, false, true, false, true, true, true, false, false, false, true, true, true, false, true, true, false, true, false, true, true, false, true, false, false, true, false, false, true, false, true, false, true, true, true, false, true, false, true, false, true, false, true, false, true, true, true, false, true, true, true, true, true, true, true, false, true, true, false, true, true, true, true, true, true, true, false, false, true, false, false, false, true, false, true, true, true, false, true, false, true, false, false, true, true, false, false, true, false, false, false, false, false, false, true, false, false, false, false, false, false, false, true, false, false, true, false, true, true, false, false, true, true, true, true, false, false, true, false, false, false, false, false, false, false, false, true, false, false, true, false, false, false, true, false, true, true, false, false, true, true, true, false, false, false, true, true, true, false, true, false, true, true, false, false, false, true, true, false, false, false, false, true, true, true, false, false, true, true, true, false, true, false, true, false, true, false, false, true, true, false, false, true, true, false, false, false, true, true, false, false, true, true, true, false, true, false, false, false, true, true, false, true, true, false, false, false, true, true, true, false, false, false, true, false, false, false, false, false, true, true]
 
 	return 1
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/hashes/sha256/512bit.zok b/zokrates_stdlib/tests/tests/hashes/sha256/512bit.zok
index 4c943001..f87a6d33 100644
--- a/zokrates_stdlib/tests/tests/hashes/sha256/512bit.zok
+++ b/zokrates_stdlib/tests/tests/hashes/sha256/512bit.zok
@@ -1,11 +1,11 @@
 import "hashes/sha256/512bit" as sha256
 def main() -> (field):
 
-field[256] a = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-field[256] b = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
+bool[256] a = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
+bool[256] b = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true]
 
-field[256] digest = sha256(a, b)
+bool[256] digest = sha256(a, b)
 
-digest == [0 ,0 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,0 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,1 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,0 ,1 ,0 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,0 ,1 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,0 ,0 ,1 ,0 ,0 ,0 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,1 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,0 ,0 ,1 ,0 ,1 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,0 ,1 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,0 ,0 ,1 ,1 ,1 ,0 ,0 ,1 ,1 ,1 ,0 ,0 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,0 ,0 ,1 ,1 ,0 ,1 ,0 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,1 ,1 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,0 ,1 ,0 ,0 ,1 ,0 ,1 ,1 ,0 ,1]
+digest == [false, false, false, true, true, true, true, true, false, false, true, true, true, false, true, true, true, false, false, false, true, false, true, true, true, false, false, true, true, false, false, false, true, true, false, false, false, false, true, false, false, false, false, true, true, true, true, false, true, false, true, true, true, false, false, false, true, false, false, true, false, true, false, false, false, false, true, true, true, true, false, false, true, false, false, false, true, true, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, false, true, false, false, false, true, false, true, true, false, false, false, false, false, true, false, true, false, false, false, false, false, true, false, true, false, false, true, false, true, true, false, true, true, false, false, false, false, true, false, false, false, false, false, true, false, true, false, true, false, true, false, true, true, false, false, false, true, false, false, true, true, false, false, false, false, true, false, true, false, false, true, true, true, false, false, true, true, true, false, false, true, true, true, false, false, false, true, true, true, true, false, false, true, true, false, true, false, true, true, true, true, false, true, true, true, true, false, false, false, true, false, false, true, true, true, false, true, false, false, false, false, false, false, true, true, true, true, false, true, true, true, true, true, false, true, false, true, false, true, true, false, false, true, true, false, false, false, false, true, true, true, true, false, true, false, false, true, false, true, true, false, true]
 
 return 1
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/hashes/sha256/512bitPadded.zok b/zokrates_stdlib/tests/tests/hashes/sha256/512bitPadded.zok
index 483325f4..16872273 100644
--- a/zokrates_stdlib/tests/tests/hashes/sha256/512bitPadded.zok
+++ b/zokrates_stdlib/tests/tests/hashes/sha256/512bitPadded.zok
@@ -15,11 +15,12 @@
 import "hashes/sha256/512bitPadded" as sha256
 def main() -> (field):
 
-	field[256] a = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-	field[256] b = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
+bool[256] a = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
+bool[256] b = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true]
 
-	field[256] digest = sha256(a, b)
+	bool[256] digest = sha256(a, b)
+
+	digest == [true, true, false, false, false, true, true, false, false, true, false, false, true, false, false, false, false, false, false, true, true, true, true, false, false, false, true, false, false, false, true, false, true, true, false, false, false, true, false, true, true, true, true, true, true, true, true, true, false, true, false, false, false, false, false, true, false, true, true, false, false, true, false, false, true, false, true, false, true, true, true, true, false, true, true, false, true, false, false, false, false, false, false, false, true, false, true, true, true, false, false, false, true, true, false, false, true, true, true, true, true, false, true, false, true, false, true, false, false, true, false, true, true, true, true, false, true, false, false, false, true, true, true, false, true, true, false, true, false, false, true, true, false, false, false, true, false, false, true, false, false, false, false, false, true, true, true, false, true, true, true, false, true, true, true, true, true, true, true, true, true, false, false, false, true, false, false, true, true, true, false, false, false, true, false, false, true, true, true, true, false, false, true, true, false, false, false, false, false, true, true, true, true, true, false, false, false, true, false, false, true, false, true, false, false, true, true, false, true, true, true, true, true, false, true, false, true, false, true, false, true, false, true, false, true, true, true, false, false, false, false, false, false, true, false, true, true, false, false, true, true, true, false, false, true, true, true, false, false, false, false, true, false, false, false, false]
 
-	digest == [1 ,1 ,0 ,0 ,0 ,1 ,1 ,0 ,0 ,1 ,0 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,1 ,0 ,0 ,1 ,0 ,1 ,0 ,1 ,1 ,1 ,1 ,0 ,1 ,1 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,1 ,0 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,0 ,1 ,0 ,1 ,0 ,0 ,1 ,0 ,1 ,1 ,1 ,1 ,0 ,1 ,0 ,0 ,0 ,1 ,1 ,1 ,0 ,1 ,1 ,0 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,1 ,1 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1 ,0 ,1 ,0 ,0 ,1 ,1 ,0 ,1 ,1 ,1 ,1 ,1 ,0 ,1 ,0 ,1 ,0 ,1 ,0 ,1 ,0 ,1 ,0 ,1 ,1 ,1 ,0 ,0 ,0 ,0 ,0 ,0 ,1 ,0 ,1 ,1 ,0 ,0 ,1 ,1 ,1 ,0 ,0 ,1 ,1 ,1 ,0 ,0 ,0 ,0 ,1 ,0 ,0 ,0 ,0]
 
 	return 1
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/hashes/utils/256bitsDirectionHelper.zok b/zokrates_stdlib/tests/tests/hashes/utils/256bitsDirectionHelper.zok
index 2f21d468..7ba74bc0 100644
--- a/zokrates_stdlib/tests/tests/hashes/utils/256bitsDirectionHelper.zok
+++ b/zokrates_stdlib/tests/tests/hashes/utils/256bitsDirectionHelper.zok
@@ -16,18 +16,20 @@ import "hashes/utils/256bitsDirectionHelper" as direction
 
 def left() -> (field):
 
-	field[256] a = [0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0]
-	field[256] b = [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1]
-	field[512] out = direction(0, a, b)
-	out == [0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1]
+	bool[256] a = [false, false, false, true, true, false, true, true, false, false, false, true, true, false, false, true, true, true, false, true, true, true, true, false, true, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false, false, true, false, false, true, true, true, false, false, false, true, true, true, true, false, false, false, false, false, true, false, true, true, false, false, true, false, false, false, false, true, true, true, true, true, false, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, false, true, false, false, false, false, true, false, false, true, true, false, false, true, true, false, false, true, true, true, true, true, true, true, true, true, false, true, false, false, true, true, true, true, false, false, true, true, false, false, false, true, false, true, false, false, false, false, true, false, true, false, false, false, false, true, true, false, false, false, true, false, false, true, true, true, true, true, false, true, false, true, false, true, false, false, true, false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, false, false, true, false, true, true, true, true, true, false, false, false, true, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, true, true, false, true, true, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, false, true, false, true, false, true, true, false, false, true, false, true, false, true, false, false, false, true, true, true, false, false, false]
+	bool[256] b = [false, false, false, false, false, false, true, true, true, true, true, true, false, false, true, true, true, true, true, true, false, true, true, false, false, false, true, false, true, false, false, false, true, true, true, false, false, false, false, false, false, true, true, false, false, true, true, true, false, true, false, true, false, false, true, false, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, true, true, false, true, true, true, true, false, true, true, true, false, false, false, true, false, true, false, false, true, false, true, false, false, true, false, true, true, false, true, true, true, false, true, false, true, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, true, false, true, true, false, true, true, false, true, true, true, true, false, false, true, false, true, false, true, true, true, false, false, false, false, true, true, true, false, true, false, false, true, true, false, true, true, true, true, true, true, false, false, false, false, false, false, false, true, true, false, true, false, false, true, false, true, true, false, false, true, true, true, false, false, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true, true, false, true, true, false, true, true, true, true, false, false, false, true, true, true, true, true, false, true, true, false, true, true, false, true, true, true, false, false, false, true, false, true, true, false, true, false, true, false, true, false, true, false, true, true, true]
+
+	bool[512] out = direction(false, a, b)
+	out == [false, false, false, true, true, false, true, true, false, false, false, true, true, false, false, true, true, true, false, true, true, true, true, false, true, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false, false, true, false, false, true, true, true, false, false, false, true, true, true, true, false, false, false, false, false, true, false, true, true, false, false, true, false, false, false, false, true, true, true, true, true, false, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, false, true, false, false, false, false, true, false, false, true, true, false, false, true, true, false, false, true, true, true, true, true, true, true, true, true, false, true, false, false, true, true, true, true, false, false, true, true, false, false, false, true, false, true, false, false, false, false, true, false, true, false, false, false, false, true, true, false, false, false, true, false, false, true, true, true, true, true, false, true, false, true, false, true, false, false, true, false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, false, false, true, false, true, true, true, true, true, false, false, false, true, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, true, true, false, true, true, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, false, true, false, true, false, true, true, false, false, true, false, true, false, true, false, false, false, true, true, true, false, false, false, false, false, false, false, false, false, true, true, true, true, true, true, false, false, true, true, true, true, true, true, false, true, true, false, false, false, true, false, true, false, false, false, true, true, true, false, false, false, false, false, false, true, true, false, false, true, true, true, false, true, false, true, false, false, true, false, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, true, true, false, true, true, true, true, false, true, true, true, false, false, false, true, false, true, false, false, true, false, true, false, false, true, false, true, true, false, true, true, true, false, true, false, true, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, true, false, true, true, false, true, true, false, true, true, true, true, false, false, true, false, true, false, true, true, true, false, false, false, false, true, true, true, false, true, false, false, true, true, false, true, true, true, true, true, true, false, false, false, false, false, false, false, true, true, false, true, false, false, true, false, true, true, false, false, true, true, true, false, false, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true, true, false, true, true, false, true, true, true, true, false, false, false, true, true, true, true, true, false, true, true, false, true, true, false, true, true, true, false, false, false, true, false, true, true, false, true, false, true, false, true, false, true, false, true, true, true]
 	return 1
 
 def right() -> (field):
 
-	field[256] a = [0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0]
-	field[256] b = [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1]
-	field[512] out = direction(1, a, b)
-	out == [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0]
+	bool[256] a = [false, false, false, true, true, false, true, true, false, false, false, true, true, false, false, true, true, true, false, true, true, true, true, false, true, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false, false, true, false, false, true, true, true, false, false, false, true, true, true, true, false, false, false, false, false, true, false, true, true, false, false, true, false, false, false, false, true, true, true, true, true, false, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, false, true, false, false, false, false, true, false, false, true, true, false, false, true, true, false, false, true, true, true, true, true, true, true, true, true, false, true, false, false, true, true, true, true, false, false, true, true, false, false, false, true, false, true, false, false, false, false, true, false, true, false, false, false, false, true, true, false, false, false, true, false, false, true, true, true, true, true, false, true, false, true, false, true, false, false, true, false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, false, false, true, false, true, true, true, true, true, false, false, false, true, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, true, true, false, true, true, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, false, true, false, true, false, true, true, false, false, true, false, true, false, true, false, false, false, true, true, true, false, false, false]
+	bool[256] b = [false, false, false, false, false, false, true, true, true, true, true, true, false, false, true, true, true, true, true, true, false, true, true, false, false, false, true, false, true, false, false, false, true, true, true, false, false, false, false, false, false, true, true, false, false, true, true, true, false, true, false, true, false, false, true, false, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, true, true, false, true, true, true, true, false, true, true, true, false, false, false, true, false, true, false, false, true, false, true, false, false, true, false, true, true, false, true, true, true, false, true, false, true, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, true, false, true, true, false, true, true, false, true, true, true, true, false, false, true, false, true, false, true, true, true, false, false, false, false, true, true, true, false, true, false, false, true, true, false, true, true, true, true, true, true, false, false, false, false, false, false, false, true, true, false, true, false, false, true, false, true, true, false, false, true, true, true, false, false, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true, true, false, true, true, false, true, true, true, true, false, false, false, true, true, true, true, true, false, true, true, false, true, true, false, true, true, true, false, false, false, true, false, true, true, false, true, false, true, false, true, false, true, false, true, true, true]
+
+	bool[512] out = direction(true, a, b)
+	out == [false, false, false, false, false, false, true, true, true, true, true, true, false, false, true, true, true, true, true, true, false, true, true, false, false, false, true, false, true, false, false, false, true, true, true, false, false, false, false, false, false, true, true, false, false, true, true, true, false, true, false, true, false, false, true, false, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, true, true, false, true, true, true, true, false, true, true, true, false, false, false, true, false, true, false, false, true, false, true, false, false, true, false, true, true, false, true, true, true, false, true, false, true, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, true, false, true, true, false, true, true, false, true, true, true, true, false, false, true, false, true, false, true, true, true, false, false, false, false, true, true, true, false, true, false, false, true, true, false, true, true, true, true, true, true, false, false, false, false, false, false, false, true, true, false, true, false, false, true, false, true, true, false, false, true, true, true, false, false, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true, true, false, true, true, false, true, true, true, true, false, false, false, true, true, true, true, true, false, true, true, false, true, true, false, true, true, true, false, false, false, true, false, true, true, false, true, false, true, false, true, false, true, false, true, true, true, false, false, false, true, true, false, true, true, false, false, false, true, true, false, false, true, true, true, false, true, true, true, true, false, true, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false, false, true, false, false, true, true, true, false, false, false, true, true, true, true, false, false, false, false, false, true, false, true, true, false, false, true, false, false, false, false, true, true, true, true, true, false, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, false, true, false, false, false, false, true, false, false, true, true, false, false, true, true, false, false, true, true, true, true, true, true, true, true, true, false, true, false, false, true, true, true, true, false, false, true, true, false, false, false, true, false, true, false, false, false, false, true, false, true, false, false, false, false, true, true, false, false, false, true, false, false, true, true, true, true, true, false, true, false, true, false, true, false, false, true, false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, false, false, true, false, true, true, true, true, true, false, false, false, true, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, true, true, false, true, true, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, false, true, false, true, false, true, true, false, false, true, false, true, false, true, false, false, false, true, true, true, false, false, false]
 	return 1
 
 def main() -> (field):
diff --git a/zokrates_stdlib/tests/tests/or.json b/zokrates_stdlib/tests/tests/or.json
deleted file mode 100644
index fff98f2c..00000000
--- a/zokrates_stdlib/tests/tests/or.json
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-	"entry_point": "./stdlib/utils/binary/or.zok",
-	"curves": ["Bn128"],
-	"tests": [
-		{
-			"input": {
-				"values": ["0", "0"]
-			},
-			"output": {
-				"Ok": {
-					"values": ["0"]
-				}
-			}
-		}
-	]
-}
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/signatures/verifyEddsa.zok b/zokrates_stdlib/tests/tests/signatures/verifyEddsa.zok
index a863548d..09dfe7a5 100644
--- a/zokrates_stdlib/tests/tests/signatures/verifyEddsa.zok
+++ b/zokrates_stdlib/tests/tests/signatures/verifyEddsa.zok
@@ -14,10 +14,10 @@ def main() -> (field):
     // Private Key
     field[2] A = [14897476871502190904409029696666322856887678969656209656241038339251270171395, 16668832459046858928951622951481252834155254151733002984053501254009901876174]
 
-    field[256] M0 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-    field[256] M1 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
+    bool[256] M0 = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
+    bool[256] M1 = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true]
 
-    field isVerified = verifyEddsa(R, S, A, M0, M1, context)
-    isVerified == 1
+    bool isVerified = verifyEddsa(R, S, A, M0, M1, context)
+    isVerified == true
 
     return 1
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/utils/multiplexer/256bit.zok b/zokrates_stdlib/tests/tests/utils/multiplexer/256bit.zok
index 9e184580..08eae996 100644
--- a/zokrates_stdlib/tests/tests/utils/multiplexer/256bit.zok
+++ b/zokrates_stdlib/tests/tests/utils/multiplexer/256bit.zok
@@ -1,22 +1,25 @@
 import "utils/multiplexer/256bit" as multiplex
 
 def left() -> (field):
-	field bit = 0  //left
-	field[256] a = [0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0]
-	field[256] b = [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1]
+	bool bit = false  //left
 
-	field[256] output = [0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0]
+	bool[256] a = [false, false, false, true, true, false, true, true, false, false, false, true, true, false, false, true, true, true, false, true, true, true, true, false, true, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false, false, true, false, false, true, true, true, false, false, false, true, true, true, true, false, false, false, false, false, true, false, true, true, false, false, true, false, false, false, false, true, true, true, true, true, false, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, false, true, false, false, false, false, true, false, false, true, true, false, false, true, true, false, false, true, true, true, true, true, true, true, true, true, false, true, false, false, true, true, true, true, false, false, true, true, false, false, false, true, false, true, false, false, false, false, true, false, true, false, false, false, false, true, true, false, false, false, true, false, false, true, true, true, true, true, false, true, false, true, false, true, false, false, true, false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, false, false, true, false, true, true, true, true, true, false, false, false, true, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, true, true, false, true, true, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, false, true, false, true, false, true, true, false, false, true, false, true, false, true, false, false, false, true, true, true, false, false, false]
+
+	bool[256] b = [false, false, false, false, false, false, true, true, true, true, true, true, false, false, true, true, true, true, true, true, false, true, true, false, false, false, true, false, true, false, false, false, true, true, true, false, false, false, false, false, false, true, true, false, false, true, true, true, false, true, false, true, false, false, true, false, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, true, true, false, true, true, true, true, false, true, true, true, false, false, false, true, false, true, false, false, true, false, true, false, false, true, false, true, true, false, true, true, true, false, true, false, true, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, true, false, true, true, false, true, true, false, true, true, true, true, false, false, true, false, true, false, true, true, true, false, false, false, false, true, true, true, false, true, false, false, true, true, false, true, true, true, true, true, true, false, false, false, false, false, false, false, true, true, false, true, false, false, true, false, true, true, false, false, true, true, true, false, false, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true, true, false, true, true, false, true, true, true, true, false, false, false, true, true, true, true, true, false, true, true, false, true, true, false, true, true, true, false, false, false, true, false, true, true, false, true, false, true, false, true, false, true, false, true, true, true]
+
+	bool[256] output = [false, false, false, true, true, false, true, true, false, false, false, true, true, false, false, true, true, true, false, true, true, true, true, false, true, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false, false, true, false, false, true, true, true, false, false, false, true, true, true, true, false, false, false, false, false, true, false, true, true, false, false, true, false, false, false, false, true, true, true, true, true, false, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, false, true, false, false, false, false, true, false, false, true, true, false, false, true, true, false, false, true, true, true, true, true, true, true, true, true, false, true, false, false, true, true, true, true, false, false, true, true, false, false, false, true, false, true, false, false, false, false, true, false, true, false, false, false, false, true, true, false, false, false, true, false, false, true, true, true, true, true, false, true, false, true, false, true, false, false, true, false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, false, false, true, false, true, true, true, true, true, false, false, false, true, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, true, true, false, true, true, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, false, true, false, true, false, true, true, false, false, true, false, true, false, true, false, false, false, true, true, true, false, false, false]
 	output == multiplex(bit, a, b)
 	
 	return 1
 	
 def right() -> (field):
-	field bit = 1  //right
+	bool bit = true  //right
 
-	field[256] a = [0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0]
-	field[256] b = [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1]
+	bool[256] a = [false, false, false, true, true, false, true, true, false, false, false, true, true, false, false, true, true, true, false, true, true, true, true, false, true, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false, false, true, false, false, true, true, true, false, false, false, true, true, true, true, false, false, false, false, false, true, false, true, true, false, false, true, false, false, false, false, true, true, true, true, true, false, true, false, true, true, false, true, true, false, false, true, true, true, true, false, true, false, false, true, false, false, false, false, true, false, false, true, true, false, false, true, true, false, false, true, true, true, true, true, true, true, true, true, false, true, false, false, true, true, true, true, false, false, true, true, false, false, false, true, false, true, false, false, false, false, true, false, true, false, false, false, false, true, true, false, false, false, true, false, false, true, true, true, true, true, false, true, false, true, false, true, false, false, true, false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, false, false, true, false, true, true, true, true, true, false, false, false, true, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, true, true, false, true, true, true, false, true, true, true, false, false, false, true, true, false, false, true, true, false, false, true, false, true, false, true, true, false, false, true, false, true, false, true, false, false, false, true, true, true, false, false, false]
+
+	bool[256] b = [false, false, false, false, false, false, true, true, true, true, true, true, false, false, true, true, true, true, true, true, false, true, true, false, false, false, true, false, true, false, false, false, true, true, true, false, false, false, false, false, false, true, true, false, false, true, true, true, false, true, false, true, false, false, true, false, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, true, true, false, true, true, true, true, false, true, true, true, false, false, false, true, false, true, false, false, true, false, true, false, false, true, false, true, true, false, true, true, true, false, true, false, true, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, true, false, true, true, false, true, true, false, true, true, true, true, false, false, true, false, true, false, true, true, true, false, false, false, false, true, true, true, false, true, false, false, true, true, false, true, true, true, true, true, true, false, false, false, false, false, false, false, true, true, false, true, false, false, true, false, true, true, false, false, true, true, true, false, false, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true, true, false, true, true, false, true, true, true, true, false, false, false, true, true, true, true, true, false, true, true, false, true, true, false, true, true, true, false, false, false, true, false, true, true, false, true, false, true, false, true, false, true, false, true, true, true]
 	
-	field[256] output = [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1]
+	bool[256] output = [false, false, false, false, false, false, true, true, true, true, true, true, false, false, true, true, true, true, true, true, false, true, true, false, false, false, true, false, true, false, false, false, true, true, true, false, false, false, false, false, false, true, true, false, false, true, true, true, false, true, false, true, false, false, true, false, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, false, true, true, false, true, true, false, true, true, true, true, false, true, true, true, false, false, false, true, false, true, false, false, true, false, true, false, false, true, false, true, true, false, true, true, true, false, true, false, true, false, false, false, false, true, true, false, true, true, false, false, true, true, false, true, false, false, true, false, true, true, false, true, true, false, true, true, true, true, false, false, true, false, true, false, true, true, true, false, false, false, false, true, true, true, false, true, false, false, true, true, false, true, true, true, true, true, true, false, false, false, false, false, false, false, true, true, false, true, false, false, true, false, true, true, false, false, true, true, true, false, false, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true, true, false, true, true, false, true, true, true, true, false, false, false, true, true, true, true, true, false, true, true, false, true, true, false, true, true, true, false, false, false, true, false, true, true, false, true, false, true, false, true, false, true, false, true, true, true]
 	output == multiplex(bit, a, b)
 	
 	return 1
diff --git a/zokrates_stdlib/tests/tests/utils/multiplexer/2bit.zok b/zokrates_stdlib/tests/tests/utils/multiplexer/2bit.zok
index dc5bea9e..e7a2748f 100644
--- a/zokrates_stdlib/tests/tests/utils/multiplexer/2bit.zok
+++ b/zokrates_stdlib/tests/tests/utils/multiplexer/2bit.zok
@@ -1,21 +1,21 @@
 import "utils/multiplexer/2bit" as multiplex
 
 def left() -> (field):
-	field bit = 0  //left
-	field[2] a  = [0, 1]
-	field[2] b = [1, 0]
+	bool bit = false  //left
+	bool[2] a  = [false, true]
+	bool[2] b = [true, false]
 	
-	field[2] output = [0, 1]
+	bool[2] output = [false, true]
 	output == multiplex(bit, a, b)
 	
 	return 1
 	
 def right() -> (field):
-	field bit = 1  //right
-	field[2] a  = [0, 1]
-	field[2] b = [1, 0]
+	bool bit = true  //right
+	bool[2] a  = [false, true]
+	bool[2] b = [true, false]
 	
-	field[2] output = [1, 0]
+	bool[2] output = [true, false]
 	output == multiplex(bit, a, b)
 	
 	return 1
diff --git a/zokrates_stdlib/tests/tests/utils/multiplexer/lookup1bit.zok b/zokrates_stdlib/tests/tests/utils/multiplexer/lookup1bit.zok
index 022d07d3..b98b0c52 100644
--- a/zokrates_stdlib/tests/tests/utils/multiplexer/lookup1bit.zok
+++ b/zokrates_stdlib/tests/tests/utils/multiplexer/lookup1bit.zok
@@ -1,7 +1,7 @@
 import "utils/multiplexer/lookup1bit" as lookup
 
 def left() -> (field):
-	field sel = 0  //left
+	bool sel = false  //left
 	field[2] t  = [0, 1]
 	
 	0 == lookup(sel, t)
@@ -9,7 +9,7 @@ def left() -> (field):
 	return 1
 	
 def right() -> (field):
-	field sel = 1  //right
+	bool sel = true  //right
 	field[2] t = [0, 1]
 	
 	1 == lookup(sel, t)
diff --git a/zokrates_stdlib/tests/tests/utils/multiplexer/lookup2bit.zok b/zokrates_stdlib/tests/tests/utils/multiplexer/lookup2bit.zok
index 052c477a..1022578c 100644
--- a/zokrates_stdlib/tests/tests/utils/multiplexer/lookup2bit.zok
+++ b/zokrates_stdlib/tests/tests/utils/multiplexer/lookup2bit.zok
@@ -1,23 +1,23 @@
 import "utils/multiplexer/lookup2bit" as lookup
 
 def first() -> (field):
-	field[2] sel = [0,0]
-	field[4] t  = [0, 1, 2 , 3]
+	bool[2] sel = [false, false]
+	field[4] t  = [0, 1, 2, 3]
 	
 	0 == lookup(sel, t)
 	
 	return 1
 	
 def second() -> (field):
-	field[2] sel = [1,0]
-	field[4] t  = [0, 1, 2 , 3]
+	bool[2] sel = [true, false]
+	field[4] t  = [0, 1, 2, 3]
 	
 	1 == lookup(sel, t)
 	
 	return 1
 	
-def thrid() -> (field):
-	field[2] sel = [0,1]
+def third() -> (field):
+	bool[2] sel = [false, true]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	2 == lookup(sel, t)
@@ -25,7 +25,7 @@ def thrid() -> (field):
 	return 1
 
 def fourth() -> (field):
-	field[2] sel = [1,1]
+	bool[2] sel = [true, true]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	3 == lookup(sel, t)
@@ -36,7 +36,7 @@ def main() -> (field):
 
 	1 == first()
 	1 == second()
-	1 == thrid()
+	1 == third()
 	1 == fourth()
 	
 	return 1
\ No newline at end of file
diff --git a/zokrates_stdlib/tests/tests/utils/multiplexer/lookup3bitSigned.zok b/zokrates_stdlib/tests/tests/utils/multiplexer/lookup3bitSigned.zok
index c85ba2eb..14c58019 100644
--- a/zokrates_stdlib/tests/tests/utils/multiplexer/lookup3bitSigned.zok
+++ b/zokrates_stdlib/tests/tests/utils/multiplexer/lookup3bitSigned.zok
@@ -1,7 +1,7 @@
 import "utils/multiplexer/lookup3bitSigned" as lookup
 
 def first() -> (field):
-	field[3] sel = [0,0,0]
+	bool[3] sel = [false,false,false]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	0 == lookup(sel, t)
@@ -9,7 +9,7 @@ def first() -> (field):
 	return 1
 
 def firstNeg() -> (field):
-	field[3] sel = [0,0,1]
+	bool[3] sel = [false,false,true]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	0 == lookup(sel, t)
@@ -17,7 +17,7 @@ def firstNeg() -> (field):
 	return 1
 
 def second() -> (field):
-	field[3] sel = [1,0,0]
+	bool[3] sel = [true,false,false]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	1 == lookup(sel, t)
@@ -25,7 +25,7 @@ def second() -> (field):
 	return 1
 
 def secondNeg() -> (field):
-	field[3] sel = [1,0,1]
+	bool[3] sel = [true,false,true]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	field out = 0 - 1
@@ -34,7 +34,7 @@ def secondNeg() -> (field):
 	return 1
 
 def thrid() -> (field):
-	field[3] sel = [0,1,0]
+	bool[3] sel = [false,true,false]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	2 == lookup(sel, t)
@@ -42,7 +42,7 @@ def thrid() -> (field):
 	return 1
 
 def thridNeg() -> (field):
-	field[3] sel = [0,1,1]
+	bool[3] sel = [false,true,true]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	field out = 0 - 2
@@ -51,7 +51,7 @@ def thridNeg() -> (field):
 	return 1
 
 def fourth() -> (field):
-	field[3] sel = [1,1,0]
+	bool[3] sel = [true,true,false]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	3 == lookup(sel, t)
@@ -59,7 +59,7 @@ def fourth() -> (field):
 	return 1
 
 def fourthNeg() -> (field):
-	field[3] sel = [1,1,1]
+	bool[3] sel = [true,true,true]
 	field[4] t  = [0, 1, 2 , 3]
 	
 	field out = 0 - 3
diff --git a/zokrates_stdlib/tests/tests/utils/pack/nonStrictUnpack256.zok b/zokrates_stdlib/tests/tests/utils/pack/nonStrictUnpack256.zok
index 44a32919..acdf18e1 100644
--- a/zokrates_stdlib/tests/tests/utils/pack/nonStrictUnpack256.zok
+++ b/zokrates_stdlib/tests/tests/utils/pack/nonStrictUnpack256.zok
@@ -2,33 +2,33 @@ import "utils/pack/nonStrictUnpack256" as unpack256
 
 def testFive() -> (field):
 
-	field[256] b = unpack256(5)
+	bool[256] b = unpack256(5)
 
-	b == [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1 ]
+	b == [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true ]
 
 	return 1
 
 def testZero() -> (field):
 
-	field[256] b = unpack256(0)
+	bool[256] b = unpack256(0)
 
-	b == [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
+	b == [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false ]
 
 	return 1
 
 def testLarge() -> (field):
 
-	field[256] b = unpack256(14474011154664524427946373126085988481658748083205070504932198000989141204991)
+	bool[256] b = unpack256(14474011154664524427946373126085988481658748083205070504932198000989141204991)
 
-	b == [0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ]
+	b == [false, false, false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true ]
 
 	return 1
 
 def testMax() -> (field):
 
-	field[256] b = unpack256(21888242871839275222246405745257275088548364400416034343698204186575808495616)
+	bool[256] b = unpack256(21888242871839275222246405745257275088548364400416034343698204186575808495616)
 
-	b == [0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
+	b == [false, false, true, true, false, false, false, false, false, true, true, false, false, true, false, false, false, true, false, false, true, true, true, false, false, true, true, true, false, false, true, false, true, true, true, false, false, false, false, true, false, false, true, true, false, false, false, true, true, false, true, false, false, false, false, false, false, false, true, false, true, false, false, true, true, false, true, true, true, false, false, false, false, true, false, true, false, false, false, false, false, true, false, false, false, true, false, true, true, false, true, true, false, true, true, false, true, false, false, false, false, false, false, true, true, false, false, false, false, false, false, true, false, true, false, true, true, false, false, false, false, true, false, true, true, true, false, true, false, false, true, false, true, false, false, false, false, false, true, true, false, false, true, true, true, true, true, false, true, false, false, false, false, true, false, false, true, false, false, false, false, true, true, true, true, false, false, true, true, false, true, true, true, false, false, true, false, true, true, true, false, false, false, false, true, false, false, true, false, false, false, true, false, true, false, false, false, false, true, true, true, true, true, false, false, false, false, true, true, true, true, true, false, true, false, true, true, false, false, true, false, false, true, true, true, true, true, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false ]
 
 	return 1
 
diff --git a/zokrates_stdlib/tests/tests/utils/pack/pack128.zok b/zokrates_stdlib/tests/tests/utils/pack/pack128.zok
index 7a5ed594..11ff1ff4 100644
--- a/zokrates_stdlib/tests/tests/utils/pack/pack128.zok
+++ b/zokrates_stdlib/tests/tests/utils/pack/pack128.zok
@@ -2,7 +2,7 @@ import "utils/pack/pack128" as pack128
 
 def testFive() -> (field):
 
-	field[128] b = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
+	bool[128] b = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true]
 	field n = pack128(b)
 
 	5 == n
@@ -11,7 +11,7 @@ def testFive() -> (field):
 
 def testZero() -> (field):
 
-	field[128] b = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+	bool[128] b = [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
 	field n = pack128(b)
 
 	0 == n
@@ -20,7 +20,7 @@ def testZero() -> (field):
 
 def testMax() -> (field):
 
-	field[128] b = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
+	bool[128] b = [true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true]
 	field n = pack128(b)
 
 	340282366920938463463374607431768211455 == n
diff --git a/zokrates_stdlib/tests/tests/utils/pack/unpack128.zok b/zokrates_stdlib/tests/tests/utils/pack/unpack128.zok
index 6d86709e..2b81cd34 100644
--- a/zokrates_stdlib/tests/tests/utils/pack/unpack128.zok
+++ b/zokrates_stdlib/tests/tests/utils/pack/unpack128.zok
@@ -2,25 +2,25 @@ import "utils/pack/unpack128" as unpack128
 
 def testFive() -> (field):
 
-	field[128] b = unpack128(5)
+	bool[128] b = unpack128(5)
 
-	b == [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1]
+	b == [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, true]
 
 	return 1
 
 def testZero() -> (field):
 
-	field[128] b = unpack128(0)
+	bool[128] b = unpack128(0)
 
-	b == [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+	b == [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]
 
 	return 1
 
 def testMax() -> (field):
 
-	field[128] b = unpack128(340282366920938463463374607431768211455)
+	bool[128] b = unpack128(340282366920938463463374607431768211455)
 
-	b == [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
+	b == [true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true]
 
 	return 1