The goal of this grant is to build out a Webb mixer using Harmony's EVM and bulletproof precompiles.
- A Webb EVM Mixer repo to be delivered and usable in Harmony ecosystem.
- Merkle trees using Poseidon hash function
- Bulletproof precompiles for verifying bulletproof R1CS proofs on-chain.
- Poseidon hash precompiles for hashing elements using Poseidon over Curve25519.
- Webb Mixer UI support for Harmony where users can use the mixer with a Harmony RPC.
Webb EVM Mixer (1-2 months)
- Cryptocurrency mixer contracts with Poseidon hash precompile support over
- Hashes will be computed over scalar field of Curve25519
- Extend verifier contracts with Bulletproofs verification precompile support.
dalek-cryptography bulletproofs R1CS.
- Incremental construction of merkle trees on-chain using Poseidon hash.
- Support for relay-able transactions.
Precompiles (1 month)
- Bulletproof proof verification precompile written in Rust w/ Golang bindings.
- Poseidon hash precompile using Curve25519 written in Rust w/ Golang bindings.