Decred - Vanity Generator

decred-vanity.php

<?php
/**
 * Decred vanity generator
 * Inspired by RiCK: https://gist.github.com/Retord/4cffeae3516e2c99fa0d
 * 
 * @author Walker de Alencar <@walkeralencar>
 */
$config = [
    'type'  => 'noseed',     // can use: 'seed' or 'noseed' or 'regtest' or 'simnet' or 'testnet'
    'prefix' => 'DsVanity',  // overwrite Vanity by your name, use less than 5 chars. should take lesser time
    'output' => 'vanity.dcr'
    'storage' => 'storage.txt'
];

/**
 * @param $output
 * @param string $type can use: 'seed'|'noseed'|'regtest'|'simnet'|'testnet'
 * @return array
 * @throws Exception
 */
function generate($output, $type = 'noseed')
{
    if (!in_array($type,['seed','noseed','regtest','simnet','testnet'])){
        throw new Exception('Invalid Type!');
    }

    if (exec( 'dcraddrgen' . ($type === 'seed'? '': ' -'. $type) . ' ' . $output)) {
        return array_map(function ($address) {
            return explode(': ', $address)[1];
        }, file($output,FILE_IGNORE_NEW_LINES));
    } else {
        throw new Exception('dcraddrgen Not Working!');
    }
}
$got = false;
$cnt = 0;
$time_start = microtime(true);
while ($got == false) {
    $address = generate($config['output'], $config['type']);
    $got = (strtolower(substr($address[0],0,15)) == strtolower($config['prefix']));
    if (!$got){
        file_put_contents($config['storage'],"('" . implode("', '",$address) . "')," . PHP_EOL, FILE_APPEND);
        unlink($config['output']);
    }
    echo $cnt++ . ': ' . $address[0] .   PHP_EOL;
}
echo (microtime(true) - $time_start) . 's and ' . $cnt . 'generated addresses;';