VotingEscrow doesn't properly store history values thus balanceOfAtNFT() and totalSupplyAt() always return 0

Lines of code Vulnerability details Impact VotingEscrow of Velodrome is a port from vyper but it had a crucial bug due to the difference of how vyper and solidity deals with memory struct assignment. In short, balanceOfAtNFTuint tokenId, uint block and totalSupplyAtuint block that should've...