HEVM Helpers
This library is intended for use with HEVM from dapphub. It enables writing to arbitrary contract's storage, targeted by a specific function.
Effectively: this allows you to set an arbitrary value like balanceOf of any contract, without knowing storage layout. i.e.:
function write_balanceOf(address who, address acct, uint256 value) public {
write_map(who, "balanceOf(address)", acct, value);
}
function write_balanceOfUnderlying(address who, address acct, uint256 value) public {
write_map(who, "balanceOfUnderlying(address)", acct, value);
}
function write_totalSupply(address who, uint256 value) public {
write_flat(who, "totalSupply()", value);
}
It supports multi-key mapping via: write_deep_map(address who, string memory sig, bytes32[] memory keys, address value). It has some limitations around structs.