contract_diff.yml

name: contract_diff

on:
  workflow_dispatch:
    inputs:
      ref:
        description: 'Branch, tag or commit SHA1 to fetch contract from'
        type: string
        default: master
      chain:
        description: 'Chain name, where contracts are located'
        type: choice
        options:
          - mainnet
          - polygon
          - optimism
          - bsc
          - arbitrum
          - gnosis-chain
        default: polygon
      target_contract_address:
        description: 'Target contract address'
        type: string
        required: true
      source:
        description: 'Type of source contract'
        type: choice
        options:
          - deployed_contract
          - source_code
        default: deployed_contract
      source_contract_address:
        description: 'Source contract address'
        type: string
        required: false
      etherscan_api_key:
        description: 'Etherscan API key'
        type: string
        required: false
env:
  FOUNDRY_PROFILE: ci

jobs:
  diff:
    name: Contract Diff
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        if: inputs.source == 'source_code'
        with:
          submodules: recursive
          ref: ${{ inputs.ref }}

      - name: Install Foundry
        uses: foundry-rs/foundry-toolchain@v1
        with:
          version: nightly
        id: init

      - name: Fetch target contract source code from Etherscan
        run: |
          mkdir -p tmp/
          cast etherscan-source -c ${{ inputs.chain }} ${{ inputs.target_contract_address }} --etherscan-api-key ${{ inputs.etherscan_api_key }} -d tmp/target

      - name: Fetch source contract from local sources
        if: inputs.source == 'source_code'
        run: |
          mkdir -p tmp/source/Local
          find . -path "./tmp" -prune -o -name "*.sol" -type f -exec cp --parents {} tmp/source/Local \;

      - name: Fetch source contract source code from Etherscan
        if: inputs.source == 'deployed_contract'
        run: |
          mkdir -p tmp/
          cast etherscan-source -c ${{ inputs.chain }} ${{ inputs.source_contract_address }} --etherscan-api-key ${{ inputs.etherscan_api_key }} -d tmp/source

      - name: Eval diff between two deployed verified contracts
        if: inputs.source == 'deployed_contract'
        run: |
          tree ./tmp
          git diff --no-index -- tmp/source/* tmp/target/* > diff.txt || true
          cat diff.txt

      - name: Eval diff between local source code and deployed verified contract
        if: inputs.source == 'source_code'
        run: |
          tree ./tmp
          git diff --no-index --diff-filter=ACM -- tmp/source/* tmp/target/* > diff.txt || true
          cat diff.txt

      - uses: actions/upload-artifact@v3
        with:
          name: contract.diff
          path: diff.txt

      - name: Publish diff
        run: |
          DIFF=$(jq --null-input --arg diff "$(cat diff.txt)" '{"diff": $diff}')
          RESPONSE=$(curl -X PUT https://diffy.org/api/diff/ -H "content-type: application/json" -d "$DIFF")
          ID=$(echo $RESPONSE | grep -o '"id":"[^,}]*"' | sed 's/.*://' | sed 's/"//g')
          echo "https://diffy.org/diff/$ID"