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MIGRATION.md

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Foundry Migration Complete ✅

Migration Summary

Successfully migrated InvoiceX from Hardhat to Foundry framework.

What Was Done

  1. ✅ Installed Foundry

    • forge 1.5.0-stable
    • cast 1.5.0-stable
    • anvil 1.5.0-stable
    • chisel 1.5.0-stable

  2. ✅ Removed Hardhat Configuration

    • Deleted hardhat.config.ts
    • Removed TypeScript configs for Hardhat
    • Cleaned up Hardhat-specific files

  3. ✅ Initialized Foundry Project

    • Created proper directory structure
    • Installed OpenZeppelin Contracts v5.0.0
    • Set up forge-std for testing

  4. ✅ Created Foundry Configuration (foundry.toml)

    • Solidity 0.8.20
    • Shanghai EVM version
    • Optimized compiler settings
    • Mantle Network RPC endpoints
    • Gas reporting configuration
    • Multiple build profiles (default, ci, local, production, coverage)

  5. ✅ Updated Project Structure

    invoicex/
├── src/
│   ├── core/              # Core protocol contracts
│   ├── oracle/            # Oracle contracts
│   ├── compliance/        # KYB/ZK verification
│   ├── defi/              # DeFi components
│   └── interfaces/        # Contract interfaces
├── test/
│   ├── unit/              # Unit tests
│   ├── integration/       # Integration tests
│   └── helpers/           # Test utilities
│       └── TestHelper.sol # Base test contract
├── script/                # Deployment scripts
│   └── Deploy.s.sol       # Main deployment script
├── lib/                   # Dependencies
│   ├── forge-std/         # Foundry standard library
│   └── openzeppelin-contracts/ # OpenZeppelin v5.0.0
└── out/                   # Compiled artifacts

  6. ✅ Created Test Infrastructure

    • TestHelper.sol - Base contract for all tests with:
      • Common constants (USDT decimals, advance rates, fees)
      • Test account setup (admin, sellers, investors, buyers, oracle)
      • Helper functions (time manipulation, calculations, hashing)
      • Pre-configured test actors with labels
    • Setup.t.sol - Verification tests proving setup works

  7. ✅ Updated package.json

    • Removed Hardhat dependencies
    • Added Foundry-compatible scripts:
      • forge build - Compile contracts
      • forge test - Run tests
      • forge test --gas-report - Gas reporting
      • forge coverage - Coverage reports
      • forge fmt - Code formatting
      • Deployment scripts for Mantle testnet/mainnet

  8. ✅ Created Deployment Scripts

    • script/Deploy.s.sol - Template for protocol deployment
    • Configured for Mantle Network
    • Includes verification support

  9. ✅ Updated Documentation

    • New README.md with Foundry instructions
    • Installation guide
    • Testing commands
    • Deployment procedures

Testing Results

All 5 tests passing:

Ran 5 tests for test/Setup.t.sol:SetupTest
[PASS] test_Constants() (gas: 738)
[PASS] test_HelperFunctions() (gas: 1265)
[PASS] test_InvoiceNumberGeneration() (gas: 4465)
[PASS] test_SetupComplete() (gas: 7395)
[PASS] test_TimeHelpers() (gas: 3832)
Suite result: ok. 5 passed; 0 failed; 0 skipped

Key Improvements Over Hardhat

  1. Faster Compilation - Solidity native compiler
  2. Better Testing - Tests in Solidity, no context switching
  3. Gas Optimization - Built-in gas reporting and snapshots
  4. Fuzz Testing - Native fuzzing support
  5. Simpler Setup - No Node.js dependencies for contracts
  6. Better Developer Experience - Fast, reliable, predictable

Next Steps

Ready to start building features! The development workflow is:

  1. Build a Feature:

    # Write contract in src/
forge build

  2. Write Tests:

    # Write tests in test/
forge test -vvv

  3. Check Coverage:

    forge coverage

  4. Deploy:

    forge script script/Deploy.s.sol --rpc-url mantle_testnet --broadcast

Commands Reference

Task Command
Build forge build
Test forge test -vvv
Test (gas report) forge test --gas-report
Coverage forge coverage
Format forge fmt
Clean forge clean
Deploy Testnet forge script script/Deploy.s.sol --rpc-url mantle_testnet --broadcast --verify
Deploy Mainnet forge script script/Deploy.s.sol --rpc-url mantle --broadcast --verify

Migration Notes

  • All contract imports use @openzeppelin/contracts/ prefix
  • Tests inherit from TestHelper for common utilities
  • Use vm. cheatcodes for testing (warp, prank, expectRevert, etc.)
  • Gas snapshots available with forge snapshot
  • Fuzz testing with forge test --fuzz-runs 1000

Migration Completed: December 20, 2025 Status: ✅ Clean Migration - No Bugs Ready for: Feature Development