hashbro
104 lines
3.2 KiB
PHP
104 lines
3.2 KiB
PHP
<?php
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namespace App\Services\Chain;
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use kornrunner\Keccak;
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use RuntimeException;
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final class TronAddress
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{
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public static function fromUncompressedPublicKey(string $publicKeyHex): string
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{
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$hex = strtolower($publicKeyHex);
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if (str_starts_with($hex, '0x')) {
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$hex = substr($hex, 2);
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}
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if (str_starts_with($hex, '04')) {
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$hex = substr($hex, 2);
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}
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if (strlen($hex) !== 128) {
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throw new RuntimeException('Expected uncompressed secp256k1 public key');
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}
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$hash = Keccak::hash(hex2bin($hex), 256);
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$addrHex = '41'.substr($hash, -40);
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return self::hexToBase58Check($addrHex);
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}
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public static function isValid(string $address): bool
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{
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if (! preg_match('/^T[1-9A-HJ-NP-Za-km-z]{33}$/', $address)) {
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return false;
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}
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try {
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$hex = self::base58CheckToHex($address);
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} catch (\Throwable) {
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return false;
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}
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return str_starts_with(strtolower($hex), '41') && strlen($hex) === 42;
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}
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public static function toHex(string $base58): string
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{
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return self::base58CheckToHex($base58);
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}
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public static function hexToBase58Check(string $hex): string
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{
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$alphabet = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
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$bin = hex2bin($hex);
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if ($bin === false) {
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throw new RuntimeException('Invalid hex');
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}
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$checksum = substr(hash('sha256', hash('sha256', $bin, true), true), 0, 4);
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$bytes = $bin.$checksum;
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$num = gmp_init(bin2hex($bytes), 16);
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$encoded = '';
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while (gmp_cmp($num, 0) > 0) {
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[$num, $rem] = [gmp_div_q($num, 58), gmp_intval(gmp_mod($num, 58))];
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$encoded = $alphabet[$rem].$encoded;
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}
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for ($i = 0, $len = strlen($bytes); $i < $len && $bytes[$i] === "\x00"; $i++) {
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$encoded = '1'.$encoded;
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}
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return $encoded;
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}
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public static function base58CheckToHex(string $address): string
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{
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$alphabet = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
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$num = gmp_init(0);
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for ($i = 0, $len = strlen($address); $i < $len; $i++) {
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$pos = strpos($alphabet, $address[$i]);
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if ($pos === false) {
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throw new RuntimeException('Invalid base58 character');
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}
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$num = gmp_add(gmp_mul($num, 58), $pos);
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}
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$hex = gmp_strval($num, 16);
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if (strlen($hex) % 2 !== 0) {
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$hex = '0'.$hex;
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}
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// leading ones => leading zero bytes
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for ($i = 0, $len = strlen($address); $i < $len && $address[$i] === '1'; $i++) {
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$hex = '00'.$hex;
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}
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$bin = hex2bin($hex);
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if ($bin === false || strlen($bin) < 5) {
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throw new RuntimeException('Invalid address payload');
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}
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$payload = substr($bin, 0, -4);
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$checksum = substr($bin, -4);
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$expected = substr(hash('sha256', hash('sha256', $payload, true), true), 0, 4);
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if (! hash_equals($expected, $checksum)) {
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throw new RuntimeException('Invalid address checksum');
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}
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return bin2hex($payload);
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}
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}
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