sigop
A CLI tool to optimize your Solidity function signatures. I wanted to create this after seeing transmissions11's comment about this optimization.
Inspired by the great work of emn178.
🧪
How does it work ?
The optimizer takes a function signature such as myFunction(address) and tries to combine it with a suffix generated from a dictionary.
For each combination, the 4-bytes function selector is computed and verified : if it contains a specified number of zeros at the beginning, the optimization has been found.
🚀
Getting started !
⚙️
Installation
Installing from cargo:
cargo install sigop
Or building locally from source:
make build-release
🏁
Quickstart
./target/release/sigop -s "myFunction(address)"
Which should print:
[2022-09-23T04:06:03Z INFO sigop::optimizer] Found this optimization: myFunction_6mI(address)
Using cast, we can see the optimized function selector:
$ cast sig "myFunction_6mI(address)"
0x00001926
✏️
Custom parameters
You can specify custom parameters used by the optimizer:
length: The maximum size of the suffix following the original function name.target: The number of zero-bytes you want to have at the beginning of the optimized function selector.
Example:
$ sigop -s "myFunction(address)" --length=4 --target=3
[2022-09-23T04:06:26Z INFO sigop::optimizer] Found this optimization: myFunction_LYq3(address)
$ cast sig "myFunction_LYq3(address)"
0x0000006d
Results
Using Remix, we can track the gas cost of calling these functions:
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.14;
contract Test {
// Execution cost : 22132
function myFunction(address a) public pure returns (address) {
return a;
}
// Execution cost : 22074
function myFunction_LYq3(address a) public pure returns (address) {
return a;
}
}
🤖
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