1 files changed, 126 insertions, 0 deletions
diff --git a/explorer/api.php b/explorer/api.php
new file mode 100644
index 000000000..109485dab
--- /dev/null
+++ b/explorer/api.php
@@ -0,0 +1,126 @@
+<?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;
+}