Epic: Usable Foreign / UltraPlonk Keccak256

[Savio-Sou]

Tracking issue for exposing the foreign Keccak256 implementation within proving backend (UltraPlonk barretenberg as first target) in Nargo.

Tasklist

Preview Give feedback

1. Add Keccak256 Opcode acvm#90
   enhancement +1
2. Epic: Upgrade to the UltraPlonk Version of Aztec Backend #991
   6 of 6
   enhancement +1
   
3. Create Foreign Keccak256 Function #1189
   enhancement +1
   

[TomAFrench]

We already have a keccak256 opcode in ACIR.

One thing we're missing however afaict is a stdlib function to call keccak256 in order to use this opcode

[kevaundray]

We already have a keccak256 opcode in ACIR.

One thing we're missing however afaict is a stdlib function to call keccak256 in order to use this opcode

That's correct -- the compiler won't process the keccak opcode so that also needs to be fixed