Open k06a opened 6 years ago
Recently Vitalik Buterin proposed to abuse ecrecover to compute hashed result of ecmul: https://ethresear.ch/t/you-can-kinda-abuse-ecrecover-to-do-ecmul-in-secp256k1-today/2384
ecrecover
ecmul
I had implemented his idea: https://github.com/1Address/ecsol/blob/master/contracts/EC.sol
It uses about 32K gas to call ecmulVerify.
ecmulVerify
Recently Vitalik Buterin proposed to abuse
ecrecoverto compute hashed result ofecmul: https://ethresear.ch/t/you-can-kinda-abuse-ecrecover-to-do-ecmul-in-secp256k1-today/2384I had implemented his idea: https://github.com/1Address/ecsol/blob/master/contracts/EC.sol
It uses about 32K gas to call
ecmulVerify.