Modern AMM routers (eg UniswapV3, Trident) feature an abstract contract selfPermit.sol that allow users to submit their own ERC712 permit signature and call another contract function in a single transaction.
As per Uniswap documentation, "These functions are expected to be embedded in multicalls to allow EOAs to approve a contract and call a function that requires an approval in a single transaction.".
I cannot find any web3 reference implementation of how this work though. How to use Multicall to selfPermit + do action (eg swap) in a single transaction?
note: ERC712 signature process is clear, the question is focused on selfPermit w/ Multicall
Looking for a web3.js illustrative implementation.
