import "./IVconstants.code" as IVconstants 
import "./shaRoundNoBoolCheck.code" as sha256 

// A function that takes 4 field[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]):

    IV =  IVconstants()
    digest1 =  sha256(a, b, IV)
    digest2 =  sha256(c, d, digest1)

	return digest2