Optimize Gas Estimation #537
Description
Currently, our binary search estimation in EstimateGas runs the same transaction at least 20 times. Refer to https://github.com/ethereum/go-ethereum/blob/v1.16.2/eth/gasestimator/gasestimator.go for optimizations made to shorten the amount of times we estimate.
In particular, short-circuit on plain sends to non-contracts, and calculate an optimisticGasLimit.