fix: add fullnodeExit()

web3.js/module.flow.js

@@ -98,6 +98,7 @@ declare module '@solana/web3.js' {
       callback: ProgramAccountChangeCallback,
     ): number;
     removeProgramAccountChangeListener(id: number): Promise<void>;
+    fullnodeExit(): Promise<boolean>;
   }
 
   // === src/system-program.js ===

web3.js/src/connection.js

@@ -521,6 +521,19 @@ export class Connection {
     return await this.sendRawTransaction(wireTransaction);
   }
 
+  /**
+   * @private
+   */
+  async fullnodeExit(): Promise<boolean> {
+    const unsafeRes = await this._rpcRequest('fullnodeExit', []);
+    const res = jsonRpcResult('boolean')(unsafeRes);
+    if (res.error) {
+      throw new Error(res.error.message);
+    }
+    assert(typeof res.result !== 'undefined');
+    return res.result;
+  }
+
   /**
    * Send a transaction that has already been signed and serialized into the
    * wire format

web3.js/test/connection.test.js

@@ -44,6 +44,28 @@ test('get account info - error', () => {
   );
 });
 
+test('fullnodeExit', async () => {
+  if (!mockRpcEnabled) {
+    console.log('fullnodeExit skipped on live node');
+    return;
+  }
+  const connection = new Connection(url);
+
+  mockRpc.push([
+    url,
+    {
+      method: 'fullnodeExit',
+    },
+    {
+      error: null,
+      result: false,
+    },
+  ]);
+
+  const result = await connection.fullnodeExit();
+  expect(result).toBe(false);
+});
+
 test('get balance', async () => {
   const account = new Account();
   const connection = new Connection(url);