async function validateMetaCompanyManifest()

in src/js/background.js [200:232]

• 27 lines of code
• 3 McCabe index (conditional complexity)

async function validateMetaCompanyManifest(rootHash, otherHashes, leaves) {
  // merge all the hashes into one
  const megaHash = JSON.stringify(leaves);
  // hash it
  const encoder = new TextEncoder();
  const encodedMegaHash = encoder.encode(megaHash);
  const jsHashArray = Array.from(
    new Uint8Array(await crypto.subtle.digest('SHA-256', encodedMegaHash))
  );
  const jsHash = jsHashArray.map(b => b.toString(16).padStart(2, '0')).join('');
  // compare to main and long tail, it should match one
  // then hash it with the other
  let combinedHash = '';
  if (jsHash === otherHashes.main || jsHash === otherHashes.longtail) {
    const combinedHashArray = Array.from(
      new Uint8Array(
        await crypto.subtle.digest(
          'SHA-256',
          encoder.encode(otherHashes.longtail + otherHashes.main)
        )
      )
    );
    combinedHash = combinedHashArray
      .map(b => b.toString(16).padStart(2, '0'))
      .join('');
  } else {
    return false;
  }

  // ensure result matches root, return.
  console.log('combined hash is ', combinedHash, rootHash);
  return combinedHash === rootHash;
}