fix(client): spotCloseDataStream removal and other fixes

src/node-binance-api.ts

@@ -60,6 +60,7 @@ export default class Binance {
     combineStreamDemo = `wss://demo-stream.binance.com/stream?streams=`;
     wsApi = `wss://ws-api.binance.${this.domain}:443/ws-api/v3`;
     wsApiTest = `wss://ws-api.testnet.binance.vision/ws-api/v3`;
+    wsApiDemo = `wss://demo-ws-api.binance.com/ws-api/v3`;
 
     verbose = false;
 
@@ -285,6 +286,7 @@ export default class Binance {
     }
 
     getWsApiUrl() {
+        if (this.Options.demo) return this.wsApiDemo;
         if (this.Options.test) return this.wsApiTest;
         return this.wsApi;
     }
@@ -741,12 +743,10 @@ export default class Binance {
      */
     async signedRequest(url: string, data: Dict = {}, method: HttpMethod = 'GET', noDataInSignature = false) {
         this.requireApiSecret('signedRequest');
-        const isListenKeyEndpoint = url.includes('v3/userDataStream');
-
         let query = method === 'POST' && noDataInSignature ? '' : this.makeQueryString(data);
 
         let signature = undefined;
-        if (!noDataInSignature && !isListenKeyEndpoint) {
+        if (!noDataInSignature) {
             data.timestamp = new Date().getTime();
 
             if (this.timeOffset) data.timestamp += this.timeOffset;
@@ -1873,6 +1873,11 @@ export default class Binance {
             throw new Error(`futuresSubscribe: cannot combine '${category}' stream "${streams[0]}" with '${mismatchCategory}' stream "${mismatch}" on one connection. Binance routes futures streams to separate /public, /market and /private endpoints; subscribe to each category separately.`);
         }
         const baseUrl = this.getFStreamUrl(category);
+        // Private combined streams use ?listenKey=<k1>&listenKey=<k2> query params
+        // instead of ?streams=<a>/<b>
+        const wsUrl = category === 'private'
+            ? baseUrl.replace(/\?streams=$/, '?') + streams.map(k => 'listenKey=' + k).join('&')
+            : baseUrl + queryParams;
         let ws: any = undefined;
         if (socksproxy) {
             socksproxy = this.proxyReplacewithIp(socksproxy);
@@ -1882,14 +1887,14 @@ export default class Binance {
                 host: this.parseProxy(socksproxy)[1],
                 port: this.parseProxy(socksproxy)[2]
             });
-            ws = new WebSocket(baseUrl + queryParams, { agent });
+            ws = new WebSocket(wsUrl, { agent });
         } else if (httpsproxy) {
             if (this.Options.verbose) this.Options.log(`futuresSubscribe: using proxy server ${httpsproxy}`);
             const config = url.parse(httpsproxy);
             const agent = new HttpsProxyAgent(config);
-            ws = new WebSocket(baseUrl + queryParams, { agent });
+            ws = new WebSocket(wsUrl, { agent });
         } else {
-            ws = new WebSocket(baseUrl + queryParams);
+            ws = new WebSocket(wsUrl);
         }
 
         ws.reconnect = this.Options.reconnect;
@@ -3942,9 +3947,10 @@ export default class Binance {
     /**
     * Ensures a WebSocket API connection is open for the given connectionId
     * @param {string} connectionId - connection identifier
+    * @param {function} messageHandler - handler for event messages when a new connection is created
     * @return {promise} - resolves when the connection is open
     */
-    private ensureWsApiConnection(connectionId: string): Promise<void> {
+    private ensureWsApiConnection(connectionId: string, messageHandler: Callback = () => {}): Promise<void> {
         return new Promise((resolve, reject) => {
             const existing = this.wsApiConnections[connectionId];
             if (existing) {
@@ -3958,7 +3964,7 @@ export default class Binance {
                     return;
                 }
             }
-            const ws = this.connectWsApi(connectionId, () => {}, () => {});
+            const ws = this.connectWsApi(connectionId, messageHandler, () => {});
             ws.once('open', () => resolve());
             ws.once('error', (err: Error) => reject(err));
         });
@@ -4378,20 +4384,68 @@ export default class Binance {
         return res;
     }
 
+    /**
+     * Opens the spot user data stream by subscribing over the WebSocket API.
+     * POST /api/v3/userDataStream was removed by Binance on 2026-02-20; user data
+     * streams are now started with the userDataStream.subscribe.signature WS-API method.
+     * Events are routed to the callbacks configured via userData()/Options.
+     * @return {promise} - resolves with { subscriptionId }
+     */
     async spotGetDataStream(params: Dict = {}) {
-        return await this.privateSpotRequest('v3/userDataStream', params, 'POST', true);
+        const connectionId = 'userData';
+        await this.ensureWsApiConnection(connectionId, this.userDataHandler.bind(this));
+        const timestamp = Date.now();
+        const query = `apiKey=${this.APIKEY}&timestamp=${timestamp}`;
+        const signature = this.generateSignature(query);
+        const result = await this.sendWsApiRequest(connectionId, 'userDataStream.subscribe.signature', {
+            apiKey: this.APIKEY,
+            timestamp: timestamp,
+            signature: signature,
+            ...params
+        });
+        this.Options.userDataSubscriptionId = result.subscriptionId;
+        return result;
     }
 
-    async spotKeepDataStream(listenKey: string | undefined = undefined, params: Dict = {}) {
-        listenKey = listenKey || this.Options.listenKey;
-        if (!listenKey) throw new Error('A listenKey is required, either as an argument or in this.Options.listenKey');
-        return await this.privateSpotRequest('v3/userDataStream', { listenKey, ...params }, 'PUT');
+    /**
+     * Kept for backwards compatibility: PUT /api/v3/userDataStream was removed by
+     * Binance on 2026-02-20 and WS-API subscriptions need no keepalive — they live as
+     * long as the connection. This only verifies the connection is still open.
+     */
+    async spotKeepDataStream() {
+        const ws = this.wsApiConnections['userData'];
+        if (!ws || ws.readyState !== WebSocket.OPEN) {
+            throw new Error('spotKeepDataStream: no open user data stream connection, start one with userData() or spotGetDataStream()');
+        }
+        if (this.Options.verbose) this.Options.log('spotKeepDataStream: keepalive is no longer required, WS-API subscriptions live as long as the connection');
+        return {};
     }
 
-    async spotCloseDataStream(listenKey: string | undefined = undefined, params: Dict = {}) {
-        listenKey = listenKey || this.Options.listenKey;
-        if (!listenKey) throw new Error('A listenKey is required, either as an argument or in this.Options.listenKey');
-        return await this.privateSpotRequest('v3/userDataStream', { listenKey, ...params }, 'DELETE');
+    /**
+     * Closes the spot user data stream by unsubscribing over the WebSocket API.
+     * DELETE /api/v3/userDataStream was removed by Binance on 2026-02-20; user data
+     * streams are now closed with the userDataStream.unsubscribe WS-API method.
+     * @param {number} subscriptionId - optional subscription to close; defaults to the
+     * subscription created by userData(). When neither is available, all subscriptions
+     * on the connection are closed. The WebSocket connection itself is terminated once
+     * the tracked subscription (or all subscriptions) has been closed.
+     */
+    async spotCloseDataStream(subscriptionId: number | undefined = undefined, params: Dict = {}) {
+        const connectionId = 'userData';
+        const ws = this.wsApiConnections[connectionId];
+        if (!ws || ws.readyState !== WebSocket.OPEN) {
+            throw new Error('spotCloseDataStream: no open user data stream connection, start one with userData()');
+        }
+        const tracked = this.Options.userDataSubscriptionId;
+        subscriptionId = subscriptionId ?? tracked;
+        const requestParams: Dict = { ...params };
+        if (subscriptionId !== undefined) requestParams.subscriptionId = subscriptionId;
+        const result = await this.sendWsApiRequest(connectionId, 'userDataStream.unsubscribe', requestParams);
+        if (subscriptionId === undefined || subscriptionId === tracked) {
+            this.Options.userDataSubscriptionId = undefined;
+            this.terminateWsApi(connectionId, false);
+        }
+        return result;
     }
 
     // /**

tests/binance-ws-api-userdata.test.ts

@@ -460,6 +460,17 @@ describe('WebSocket API JSON-RPC', function () {
             }
         }).timeout(35000);
     });
+
+    describe('spotCloseDataStream', function () {
+        it('should reject when no user data stream connection is open', async function () {
+            try {
+                await binance.spotCloseDataStream();
+                assert.fail('Should have thrown an error');
+            } catch (error: any) {
+                assert(error.message.includes('no open user data stream connection'), 'Should indicate the connection is missing');
+            }
+        });
+    });
 });
 
 describe('WebSocket API Live Tests', function () {
@@ -504,6 +515,56 @@ describe('WebSocket API Live Tests', function () {
             );
         });
 
+        it('should close the user data stream with spotCloseDataStream', function (done) {
+            this.timeout(TIMEOUT);
+
+            binance.websockets.userData(
+                (data) => {
+                    console.log('User data event:', data);
+                },
+                undefined,
+                undefined,
+                async (endpoint) => {
+                    try {
+                        assert((binance as any).Options.userDataSubscriptionId !== undefined, 'Should have subscription ID');
+
+                        const result = await binance.spotCloseDataStream();
+                        console.log('Unsubscribed:', result);
+
+                        assert((binance as any).Options.userDataSubscriptionId === undefined, 'Subscription ID should be cleared');
+                        assert((binance as any).wsApiConnections['userData'] === undefined, 'Connection should be removed');
+                        done();
+                    } catch (error: any) {
+                        stopWsApiConnections();
+                        done(error);
+                    }
+                }
+            );
+        });
+
+        it('should manage the stream lifecycle with spotGetDataStream/spotKeepDataStream/spotCloseDataStream', async function () {
+            this.timeout(TIMEOUT);
+
+            try {
+                const subscription = await binance.spotGetDataStream();
+                console.log('Subscribed:', subscription);
+                assert(subscription !== null, WARN_SHOULD_BE_NOT_NULL);
+                assert(subscription.subscriptionId !== undefined, WARN_SHOULD_HAVE_KEY + 'subscriptionId');
+                assert((binance as any).Options.userDataSubscriptionId === subscription.subscriptionId, 'Subscription ID should be tracked');
+
+                const keepAlive = await binance.spotKeepDataStream();
+                assert(keepAlive !== null, WARN_SHOULD_BE_NOT_NULL);
+
+                const result = await binance.spotCloseDataStream();
+                console.log('Unsubscribed:', result);
+                assert((binance as any).Options.userDataSubscriptionId === undefined, 'Subscription ID should be cleared');
+                assert((binance as any).wsApiConnections['userData'] === undefined, 'Connection should be removed');
+            } catch (error) {
+                stopWsApiConnections();
+                throw error;
+            }
+        });
+
         it('should receive execution and balance events when creating a market order', function (done) {
             this.timeout(TIMEOUT);
 

tests/ws-endpoints-migration.test.ts

@@ -180,6 +180,19 @@ describe('futuresSubscribe rejects mixed-category combined streams', function ()
     });
 });
 
+describe('futuresSubscribe combined private streams', function () {
+    it('uses listenKey query params for multiple listenKeys', function () {
+        const k1 = 'pqia91ma19a5s61cv6a81va65sdf19v8a65a1a5s61cv6a81va65sdf19v8a1a65a1a5s61cv6a81va65sd';
+        const k2 = k1.split('').reverse().join('');
+        const ws: any = binance.futuresSubscribe([k1, k2], () => { });
+        try {
+            assert.equal(ws.url, `wss://fstream.binance.com/private/stream?listenKey=${k1}&listenKey=${k2}`);
+        } finally {
+            ws.terminate();
+        }
+    });
+});
+
 describe('Live: production market stream (aggTrade via /market/)', function () {
     let trade;
     let cnt = 0;