hashbro
34 lines
889 B
PHP
34 lines
889 B
PHP
<?php
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namespace App\Services\Chain;
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use Elliptic\EC;
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use RuntimeException;
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final class TronSigner
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{
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/**
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* Sign a Tron txID (sha256 hex of raw_data) → 65-byte hex signature (r||s||v).
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*/
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public static function signTxId(string $privateKeyHex, string $txIdHex): string
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{
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$txIdHex = strtolower(ltrim($txIdHex, '0x'));
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if (strlen($txIdHex) !== 64) {
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throw new RuntimeException('Invalid txID');
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}
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$ec = new EC('secp256k1');
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$key = $ec->keyFromPrivate($privateKeyHex);
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$sig = $key->sign($txIdHex, ['canonical' => true]);
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$r = str_pad($sig->r->toString(16), 64, '0', STR_PAD_LEFT);
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$s = str_pad($sig->s->toString(16), 64, '0', STR_PAD_LEFT);
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$v = dechex($sig->recoveryParam & 0xff);
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if (strlen($v) === 1) {
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$v = '0'.$v;
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}
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return $r.$s.$v;
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}
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}
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