Function generateDataToBeSigned

js/sign/src/utils/utils.ts:185–217

(
  webBundleHash: Uint8Array,
  integrityBlockCborBytes: Uint8Array,
  newAttributesCborBytes: Uint8Array
)

}

export function generateDataToBeSigned(
  webBundleHash: Uint8Array,
  integrityBlockCborBytes: Uint8Array,
  newAttributesCborBytes: Uint8Array
): Uint8Array {
  // The order is critical and must be the following:
  // (0) hash of the bundle,
  // (1) integrity block, and
  // (2) attributes.
  const dataParts = [
    webBundleHash,
    integrityBlockCborBytes,
    newAttributesCborBytes,
  ];

  const bigEndianNumLength = 8;

  const totalLength = dataParts.reduce((previous, current) => {
    return previous + current.length;
  }, /*one big endian num per part*/ dataParts.length * bigEndianNumLength);
  const buffer = Buffer.alloc(totalLength);

  let offset = 0;
  dataParts.forEach((d) => {
    buffer.writeBigInt64BE(BigInt(d.length), offset);
    offset += bigEndianNumLength;

    Buffer.from(d).copy(buffer, offset);
    offset += d.length;
  });

  return new Uint8Array(buffer);
}