EVM Smart Contract Development Random Tips

Testing

1. Pattern for testing lens against mutative version function

1. Heuristic Invariant/Property in finance apps

1. Compiling contracts faster with forge-std::deployCode or forge-std::deployCodeTo

Gas Optimization

1. Storing callback data on transient storage might be chapter than passing data to callback function

   Example: metapool-router #246

2. Replace JUMPI with opcode for failure pattern
   Imagine if-else branch like if condition, then revert, the JUMPI can be replaced with mload(condition - 0x01). The similar optimization can be seen in mega-dropper.

Deployment

1. Crunch CREATE2 salt on terminal

1. Library to deploy contracts built by Hardhat with Foundry

1. Recording git commiet on-chain will make it easier to find version of upgradable contract