check_bootnodes_enrs.yml

name: Check Bootnodes ENRs

on:
  pull_request:
    branches:
      - main

jobs:
  check_enrs:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Install yq
        uses: mikefarah/yq@master

      - name: Install protobuf-compiler
        run: |
          sudo apt-get update
          sudo apt-get install -y protobuf-compiler

      - name: Install enr-cli
        run: cargo install enr-cli

      - name: Check bootnodes ENRs for padding
        run: |
          files_with_padding=""
          for FILE in $(find . -type f \( -name 'bootnodes.yaml' -o -name 'bootstrap_nodes.txt' \)); do
            echo "Checking paddings in file: $FILE"
            while read -r LINE; do
              if [[ "$LINE" =~ enr: ]]; then
                BASE64_STRING=${LINE#enr:}
                if [[ "$BASE64_STRING" =~ = ]]; then
                  if [[ "$files_with_padding" != *"$FILE"* ]]; then
                    echo "Error: ENR in $FILE contains padding: $LINE"
                    files_with_padding="$files_with_padding $FILE"
                  fi
                fi
              fi
            done < "$FILE"
          done
          if [ -n "$files_with_padding" ]; then
            echo "Error: Bootnodes ENR strings contain padding in the following files:"
            echo "$files_with_padding"
            exit 1
          fi

      - name: Check ENR Strings with enr-cli
        run: |
          for FILE in $(find . -type f \( -name 'bootnodes.yaml' -o -name 'bootstrap_nodes.txt' \)); do
            echo "Processing file: $FILE"

            # Parse non empty and non comment lines
            if [[ "$FILE" == *".yaml" ]]; then
              LINES=$(yq eval '.[]' "$FILE" | grep -v -E '^[[:space:]]*(#|$)')
            elif [[ "$FILE" == *".txt" ]]; then
              LINES=$(grep -v -E '^[[:space:]]*(#|$)' "$FILE")
            else
              echo "Unsupported file type: $FILE"
              exit 1
            fi

            # Process lines
            while IFS= read -r LINE; do
              # Check if the line contains the "enr" prefix
              if [[ -z "$LINE" ]]; then
                continue
              elif [[ "$LINE" != *enr:* ]]; then
                echo "Error: Line is not proper enr string: in file: $FILE\nLine: $LINE"
                exit 1
              fi

              # Parse actual "enr" strings after the "enr:" prefix
              ENR_STRING=$(echo "$LINE" | grep -o 'enr:[^[:space:]]*' | cut -d ':' -f2- | sed 's/^ *//')
              echo "Processing line: $ENR_STRING"

              # Use enr-cli read to validate the actual "enr" strings
              enr-cli read "$ENR_STRING" 1>/dev/null || {
                echo "Error: enr-cli read failed for line: $ENR_STRING in file: $FILE"
                exit 1
              }
            done <<< "$LINES"
          done