crawler-api-node/library/base58check.php

<?php

class Base58Check {

  public static function encode(string $string, int $prefix = 128, bool $compressed = true) {

    $string = hex2bin($string);

    if ($prefix) {
      $string = chr($prefix) . $string;
    }

    if ($compressed) {
      $string .= chr(0x01);
    }

    $string = $string . substr(Hash::SHA256(Hash::SHA256($string)), 0, 4);

    $base58 = Base58::encode(Crypto::bin2bc($string));

    for ($i = 0; $i < strlen($string); $i++) {

      if ($string[$i] != '\x00') {
        break;
      }

      $base58 = '1' . $base58;
    }

    return $base58;
  }

  public static function decode(string $string, int $removeLeadingBytes = 1, int $removeTrailingBytes = 4, bool $removeCompression = true) {

    $string = bin2hex(Crypto::bc2bin(Base58::decode($string)));

    if ($removeLeadingBytes) {
      $string = substr($string, $removeLeadingBytes * 2);
    }

    if ($removeTrailingBytes) {
      $string = substr($string, 0, -($removeTrailingBytes * 2));
    }

    if ($removeCompression) {
      $string = substr($string, 0, -2);
    }

    return $string;
  }
}