const crypto = require('crypto')
const b4a = require('b4a')
const base58 = require('bs58')
// @ts-ignore
const stringify = require('json-canon')

/**
 * @typedef {Buffer | Uint8Array} B4A
 */

/**
 * @param {any} data
 * @returns {[string, number]}
 */
function representData(data) {
  const dataBuf = b4a.from(stringify(data), 'utf8')
  const fullHash = crypto.createHash('sha512').update(dataBuf).digest()
  const dataHash = base58.encode(fullHash.subarray(0, 32))
  const dataSize = dataBuf.length
  return [dataHash, dataSize]
}

module.exports = representData