# Implementation Plan: Ethers.js v5 to v6 Migration

## Phase 1: Core Math & Utilities Migration

- [x] Task: Create feature branch from current branch (feature/test-uniswap-position-quoter) (branch: feature/ethers-v6-migration)

  - [x] Create branch: `feature/ethers-v6-migration`
  - [x] Switch to new branch
  - [x] Verify branch setup is correct

- [x] Task: Set up ethers v6 dependency and verify installation [d36546b]

  - [x] Update package.json to include ethers v6
  - [x] Install dependencies
  - [x] Verify ethers v6 is properly imported

- [x] Task: Audit codebase for BigNumber usage [9f704d2]

  - [x] Search for all BigNumber imports across the codebase
  - [x] Document all BigNumber usage patterns and locations
  - [x] Identify calculation-critical BigNumber operations

- [x] Task: Create migration test harness (v5 vs v6 comparison) [486ada9]

  - [x] Set up test utilities to compare BigNumber vs BigInt outputs
  - [x] Create test fixtures with known input/output pairs
  - [x] Write tests that verify calculation parity

  - [~] Verify code coverage >80%

- [x] Task: Migrate core calculation engines to BigInt [8afce71]

- [x] Task: Update TypeScript types for BigInt compatibility

  - [~] Write failing type definitions
  - [x] Implement proper BigInt type annotations
  - [x] Run TypeScript compiler and fix any type errors

- [ ] Task: Conductor - User Manual Verification 'Phase 1: Core Math & Utilities Migration' (Protocol in workflow.md)

## Phase 2: Provider Layer Migration [checkpoint: 8d35585]

- [x] Task: Audit provider and signer usage

  - [x] Document all provider instantiation patterns
  - [x] Identify signer creation and usage locations
  - [x] Map network detection and chain ID handling

- [x] Task: Write provider migration tests

  - [x] Create tests for provider connection and configuration
  - [x] Write tests for signer operations
  - [x] Test network detection functionality

- [x] Task: Migrate provider instantiation

  - [ ] Write failing tests for ethers v6 provider patterns
  - [x] Implement updated provider creation logic
  - [x] Run tests and verify all pass

- [x] Task: Migrate signer interfaces

  - [ ] Write failing tests for signer operations
  - [x] Implement updated signer logic
  - [x] Run tests and verify all pass

- [x] Task: Update network detection logic

  - [x] Write failing tests for network detection
  - [x] Implement updated network handling
  - [x] Run tests and verify all pass

- [ ] Task: Conductor - User Manual Verification 'Phase 2: Provider Layer Migration' (Protocol in workflow.md)

## Phase 3: Contract Interaction Migration [checkpoint: 24c691d]

- [x] Task: Audit contract interaction patterns

  - [x] Document all contract factory usage
  - [x] Identify ABI encoding/decoding locations
  - [x] Map contract method calls and event handling

- [x] Task: Write contract migration tests

  - [x] Create tests for contract factory patterns
  - [x] Write tests for ABI encoding/decoding
  - [x] Test contract method calls

- [x] Task: Migrate contract factory patterns

  - [ ] Write failing tests for ethers v6 contract factories
  - [x] Implement updated contract factory logic
  - [x] Run tests and verify all pass

- [x] Task: Migrate ABI encoding/decoding

  - [x] Write failing tests for ABI operations
  - [x] Implement updated ABI encoding/decoding
  - [x] Run tests and verify all pass

- [x] Task: Update contract method calls

  - [x] Write failing tests for contract interactions
  - [x] Implement updated method call patterns
  - [x] Run tests and verify all pass

- [x] Task: Migrate event handling

  - [x] Write failing tests for event listening
  - [x] Implement updated event handling
  - [x] Run tests and verify all pass

- [ ] Task: Conductor - User Manual Verification 'Phase 3: Contract Interaction Migration' (Protocol in workflow.md)

## Phase 4: Integration & Final Verification

- [x] Task: Run full test suite and verify all pass

  - [x] Execute complete test suite
  - [x] Verify no regressions
  - [x] Document any test failures and resolutions

- [x] Task: Verify calculation accuracy with comparison tests

  - [x] Run v5 vs v6 comparison tests
  - [x] Verify all calculations produce identical results
  - [x] Document any discrepancies

- [~] Task: Verify code coverage >80%

  - [ ] Generate coverage report
  - [ ] Identify any uncovered code paths
  - [ ] Add tests to achieve >80% coverage

- [~] Task: Update documentation and examples

  - [ ] Update README with v6 API changes
  - [ ] Update code examples to use v6 syntax
  - [ ] Document breaking changes for users

- [ ] Task: Final integration testing

  - [ ] Test with live providers
  - [ ] Verify end-to-end functionality
  - [ ] Test with real contract interactions

- [ ] Task: Conductor - User Manual Verification 'Phase 4: Integration & Final Verification' (Protocol in workflow.md)