pps-php/examples/09-trust-code-verification.php at master · pps-protocol/pps-php · GitHub

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<?php

/**
 * PPS-PHP Example 09: Trust Code Verification
 *
 * Demonstrates Trust Code generation and verification:
 * 1. Generate Trust Code from signature
 * 2. Verify Trust Code matches
 * 3. AmountMark embedding
 *
 * Usage:
 *   php examples/09-trust-code-verification.php
 */

declare(strict_types=1);

require_once __DIR__ . '/../vendor/autoload.php';

use Pps\Crypto\Base64Url;
use Pps\Crypto\Ed25519;
use Pps\Key\KeyManager;
use Pps\Trust\AmountMark;
use Pps\Trust\TrustCodeGenerator;
use Pps\Trust\TrustPhraseGenerator;

echo "=== PPS-PHP Example 09: Trust Code Verification ===\n\n";

$rpId = 'example.com';
$nonce = random_bytes(16);
$epoch = intdiv(time(), 30);

// Generate a test signature
$key = KeyManager::generateKeyPair();
$message = 'test-message';
$signature = Ed25519::sign($message, $key->secretKey);

// ---------------------------------------------------------------
// Step 1: Generate Trust Code
// ---------------------------------------------------------------

echo "Step 1: Generate Trust Code\n";

$trustCode = TrustCodeGenerator::generate(
    $signature,
    $rpId,
    $nonce,
    $epoch,
    8
);

echo "  Trust Code: $trustCode\n";

// ---------------------------------------------------------------
// Step 2: Verify Trust Code
// ---------------------------------------------------------------

echo "\nStep 2: Verify Trust Code\n";

$valid = TrustCodeGenerator::verify(
    $trustCode,
    $signature,
    $rpId,
    $nonce,
    $epoch
);

echo "  Valid: " . ($valid ? 'YES' : 'NO') . "\n";

// ---------------------------------------------------------------
// Step 3: AmountMark embedding
// ---------------------------------------------------------------

echo "\nStep 3: AmountMark embedding\n";

$amountMinor = 2500067;
$amountMark = AmountMark::generate($amountMinor);

$trustCodeWithAmount = TrustCodeGenerator::generate(
    $signature,
    $rpId,
    $nonce,
    $epoch,
    8,
    $amountMinor
);

echo "  Amount: " . number_format($amountMinor) . "\n";
echo "  AmountMark: $amountMark\n";
echo "  Trust Code: $trustCodeWithAmount\n";
echo "  Last 2 digits: " . substr($trustCodeWithAmount, -2) . "\n";

// ---------------------------------------------------------------
// Step 4: Trust Phrase
// ---------------------------------------------------------------

echo "\nStep 4: Trust Phrase\n";

$trustPhrase = TrustPhraseGenerator::generate(
    $signature,
    $rpId,
    $nonce,
    $epoch
);

echo "  Trust Phrase: $trustPhrase\n";

echo "\n=== Example 09 Complete ===\n";