go-mev-geth
go mev-geth example. signTx,send transaction to relay.
sample smart contract
/eth/contract/mevtransfer/mevtransfer.sol
pragma solidity 0.6.6;
interface IChiToken {
function freeFromUpTo(address from, uint256 value) external;
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
}
contract MevTransfer{
IChiToken constant public chi = IChiToken(0x0000000000004946c0e9F43F4Dee607b0eF1fA1c);
modifier discountCHI {
uint gasStart = gasleft();
_;
uint gasSpent = 21000 + gasStart - gasleft() + 16 * msg.data.length;
uint chiToUse = (gasSpent + 14154) / 41947;
if (chiToUse > 0 && chi.balanceOf(msg.sender) >= chiToUse && chi.allowance(msg.sender,address(this)) >= chiToUse){
chi.freeFromUpTo(msg.sender, (gasSpent + 14154) / 41947);
}
}
function transfer(uint bribe) external payable discountCHI {
block.coinbase.transfer(bribe);
msg.sender.transfer(address(this).balance);
}
}
a sample contract to 1. give bribe 2. use chi token 3. do a sample transfer.
use abigen to get go binding code.
sign & send tx
/bundle/bundle.go
build tx
/bundle/bundle_test.go
how to use
change sender & contract var in TestBundle_Simulate and run test.
the sender is the EOA to send the tx.
the contract is the mevTransfer.sol address after deploy.
