Function unpad

src/utils/nip44.ts:84–91

(padded: Buffer)

}

function unpad(padded: Buffer): string {
  const unpaddedLen = padded.readUInt16BE(0)
  const unpadded = padded.subarray(2, 2 + unpaddedLen)
  if (unpaddedLen === 0 || unpadded.length !== unpaddedLen || padded.length !== 2 + calcPaddedLen(unpaddedLen)) {
    throw new Error('invalid padding')
  }
  return unpadded.toString('utf8')
}

/**
 * Encrypt plaintext using NIP-44 v2.