ваше сообщение коммита

backend/services/rpcProviderService.js

@@ -0,0 +1,31 @@
+const db = require('../db');
+
+async function getAllRpcProviders() {
+  const { rows } = await db.query('SELECT * FROM rpc_providers ORDER BY id');
+  return rows;
+}
+
+async function saveAllRpcProviders(rpcConfigs) {
+  await db.query('DELETE FROM rpc_providers');
+  for (const cfg of rpcConfigs) {
+    await db.query(
+      'INSERT INTO rpc_providers (network_id, rpc_url, chain_id) VALUES ($1, $2, $3)',
+      [cfg.networkId, cfg.rpcUrl, cfg.chainId || null]
+    );
+  }
+}
+
+async function upsertRpcProvider(cfg) {
+  await db.query(
+    `INSERT INTO rpc_providers (network_id, rpc_url, chain_id)
+     VALUES ($1, $2, $3)
+     ON CONFLICT (network_id) DO UPDATE SET rpc_url=EXCLUDED.rpc_url, chain_id=EXCLUDED.chain_id`,
+    [cfg.networkId, cfg.rpcUrl, cfg.chainId || null]
+  );
+}
+
+async function deleteRpcProvider(networkId) {
+  await db.query('DELETE FROM rpc_providers WHERE network_id = $1', [networkId]);
+}
+
+module.exports = { getAllRpcProviders, saveAllRpcProviders, upsertRpcProvider, deleteRpcProvider };