hardhat-tracer/src/utils/compare-bytecode.ts

Hardhat Tracer plugin

export function compareBytecode(
  artifactBytecode: string,
  contractBytecode: string
): number {
  if (artifactBytecode.length <= 2 || contractBytecode.length <= 2) {
    return 0;
  }

  if (typeof artifactBytecode === "string") {
    artifactBytecode = artifactBytecode
      .replace(/\_\_\$/g, "000")
      .replace(/\$\_\_/g, "000");
  }

  let matchedBytes = 0;
  for (let i = 0; i < artifactBytecode.length; i++) {
    if (artifactBytecode[i] === contractBytecode[i]) {
      matchedBytes++;
    }
  }
  if (isNaN(matchedBytes / artifactBytecode.length)) {
    console.log(matchedBytes, artifactBytecode.length);
  }

  return matchedBytes / artifactBytecode.length;
}