first commit

utils/rpc-client.ts

@@ -0,0 +1,76 @@
+import net from 'net'
+
+interface JsonRpcRequest {
+  jsonrpc: '2.0'
+  method: string
+  params?: any
+  id: number
+}
+
+interface JsonRpcResponse {
+  jsonrpc: '2.0'
+  id: number
+  result?: any
+  error?: { code: number; message: string; data?: any }
+  context?: any
+}
+
+export class JsonRpcClient {
+  private host: string
+  private port: number
+  private timeout: number
+
+  constructor(host: string = '127.0.0.1', port: number = 9504, timeout = 1000) {
+    this.host = host
+    this.port = port
+    this.timeout = timeout
+  }
+
+  async call(method: string, params?: any): Promise<any> {
+    const req: JsonRpcRequest = {
+      jsonrpc: '2.0',
+      method,
+      params,
+      id: Date.now(),
+    }
+
+
+    const message = JSON.stringify(req) + '\n'
+
+    return new Promise((resolve, reject) => {
+      const client = new net.Socket()
+      let response = ''
+
+      client.setEncoding('utf-8')
+      const timer = setTimeout(() => {
+        client.destroy()
+        reject(new Error('RPC call timed out'))
+      }, this.timeout)
+
+      client.connect(this.port, this.host, () => {
+        client.write(message)
+      })
+
+      client.on('data', (data) => {
+        response += data.toString()
+        try {
+          const res: JsonRpcResponse = JSON.parse(response)
+          clearTimeout(timer)
+          client.end()
+          if (res.error) {
+            reject(new Error(res.error.message))
+          } else {
+            resolve(res.result)
+          }
+        } catch (e) {
+          // wait for more data
+        }
+      })
+
+      client.on('error', (err) => {
+        clearTimeout(timer)
+        reject(err)
+      })
+    })
+  }
+}