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<?php
declare(strict_types=1);
const NODE_RPC = 'http://node.monzero.org:6175';
const MAX_RANGE = 25;
header('Content-Type: application/json; charset=utf-8');
header('Cache-Control: no-store');
header('X-Content-Type-Options: nosniff');
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
respond(['error' => 'POST required'], 405);
}
$input = json_decode(file_get_contents('php://input'), true);
if (!is_array($input)) respond(['error' => 'Invalid JSON'], 400);
$action = $input['action'] ?? '';
try {
switch ($action) {
case 'info':
respond(rpc('/get_info', []));
case 'blocks':
$info = rpc('/get_info', []);
$height = max(1, (int)($info['height'] ?? 1));
$limit = min(MAX_RANGE, max(1, (int)($input['limit'] ?? 15)));
$end = max(0, $height - 1);
$start = max(0, $end - $limit + 1);
$range = jsonRpc('get_block_headers_range', [
'start_height' => $start,
'end_height' => $end,
'fill_pow_hash' => false,
]);
respond(['info' => $info, 'headers' => array_reverse($range['headers'] ?? [])]);
case 'block':
$params = ['fill_pow_hash' => true];
if (isset($input['height']) && is_numeric($input['height'])) {
$params['height'] = max(0, (int)$input['height']);
} elseif (validHash($input['hash'] ?? '')) {
$params['hash'] = strtolower($input['hash']);
} else {
respond(['error' => 'Valid height or block hash required'], 400);
}
respond(jsonRpc('get_block', $params));
case 'transaction':
$hash = strtolower((string)($input['hash'] ?? ''));
if (!validHash($hash)) respond(['error' => 'Valid transaction hash required'], 400);
$result = rpc('/get_transactions', [
'txs_hashes' => [$hash],
'decode_as_json' => true,
'prune' => false,
'split' => true,
]);
if (empty($result['txs']) && empty($result['txs_as_json'])) respond(['error' => 'Transaction not found'], 404);
respond($result);
case 'pool':
respond(rpc('/get_transaction_pool', []));
default:
respond(['error' => 'Unknown action'], 400);
}
} catch (Throwable $error) {
error_log('Monzero explorer API: ' . $error->getMessage());
respond(['error' => 'Node request failed'], 502);
}
function validHash(mixed $value): bool {
return is_string($value) && preg_match('/^[0-9a-fA-F]{64}$/', $value) === 1;
}
function jsonRpc(string $method, array $params): array {
$response = rpc('/json_rpc', [
'jsonrpc' => '2.0',
'id' => '0',
'method' => $method,
'params' => $params,
]);
if (isset($response['error'])) throw new RuntimeException($response['error']['message'] ?? 'RPC error');
return $response['result'] ?? [];
}
function rpc(string $path, array $payload): array {
// Daemon endpoints expect an empty JSON object, not an empty JSON array.
$json = $payload === [] ? '{}' : json_encode($payload, JSON_THROW_ON_ERROR);
if (function_exists('curl_init')) {
$curl = curl_init(NODE_RPC . $path);
curl_setopt_array($curl, [
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => $json,
CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
CURLOPT_RETURNTRANSFER => true,
CURLOPT_CONNECTTIMEOUT => 3,
CURLOPT_TIMEOUT => 12,
]);
$body = curl_exec($curl);
$status = curl_getinfo($curl, CURLINFO_RESPONSE_CODE);
$message = curl_error($curl);
curl_close($curl);
if ($body === false || $status !== 200) throw new RuntimeException($message ?: 'HTTP ' . $status);
} else {
$context = stream_context_create(['http' => [
'method' => 'POST',
'header' => "Content-Type: application/json\r\nConnection: close\r\n",
'content' => $json,
'timeout' => 12,
'ignore_errors' => true,
]]);
$body = @file_get_contents(NODE_RPC . $path, false, $context);
$statusLine = $http_response_header[0] ?? '';
preg_match('/\s(\d{3})\s/', $statusLine, $match);
$status = isset($match[1]) ? (int)$match[1] : 0;
if ($body === false || $status !== 200) throw new RuntimeException('HTTP ' . $status);
}
$decoded = json_decode($body, true, 512, JSON_THROW_ON_ERROR);
return is_array($decoded) ? $decoded : [];
}
function respond(array $data, int $status = 200): never {
http_response_code($status);
echo json_encode($data, JSON_UNESCAPED_SLASHES | JSON_INVALID_UTF8_SUBSTITUTE);
exit;
}
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