🔌Enhanced Websockets

Stream real-time data directly to your applications with our websocket integration.

What are Websockets?

Websockets allow for two-way communication between a client and a server. Unlike traditional request-response models, Websockets keep a persistent connection open, enabling real-time data exchange. This is perfect for applications that require instant updates like chat apps, online games, trading bots, and marketplaces.

Why Use Helius Websockets?

Direct Streaming: No more polling or periodic checks. Get data directly when changes happen.
Seamless Integration: Easily integrate our websockets into your application at any layer. Websockets can be used directly in your frontend!
Cost-Effective: Reduce the overhead and expenses that come with frequently polling data.
Built on top of Geyser: Instantly react to live on-chain data changes by getting a direct feed into Geyser data. Read more about Geyser here.
Infinite Implementations: Create wallet trackers, program monitoring tools or anything else that requires or benefits from live on-chain data. View some examples here.

Standard Websockets

Helius supports all stable Solana Websockets. You can find a list of all these Websockets in the Solana documentation. You can use these with your Helius WSS URL:. Mainnet: wss://mainnet.helius-rpc.com/?api-key=<YOUR_API_KEY> Devnet: wss://devnet.helius-rpc.com/?api-key=<YOUR_API_KEY>

Helius' Geyser Enhanced Websockets (beta)

In addition to supporting Solana's standard Websocket methods, Helius provides access to Geyser-enhanced Websockets. These Websockets boast faster response speeds when compared to the standard RPC Websocket methods.

These Websockets are currently in beta. We would love your feedback on Discord!

Subscription Endpoints

Helius geyser-enhanced websockets are currently available in mainnet and devnet with the following URL's

Mainnet: wss://atlas-mainnet.helius-rpc.com?api-key=<API_KEY>

Devnet: wss://atlas-devnet.helius-rpc.com?api-key=<API_KEY>

This feature is only available for Business and Professional plans while still in beta.

While Solana offers several websocket methods for various functionalities, it notably lacks a dedicated method for subscribing to transaction updates. To bridge this gap, Helius introduces the transactionSubscribe websocket method. This allows developers to tune in to real-time transaction events. In order to subscribe to transactions, you need to provide a TransactionSubscribeFilter and can optionally provide TransactionSubscribeOptions

Example Payload:

{
  "jsonrpc": "2.0",
  "id": 420,
  "method": "transactionSubscribe",
  "params": [
      {
        "vote": false,
        "failed": false,
        "signature": "2dd5zTLrSs2udfNsegFRCnzSyQcPrM9svX6m1UbEM5bSdXXFj3XpqaodtKarLYFP2mTVUsV27sRDdZCgcKhjeD9S",
        "accountInclude": ["pqx3fvvh6b2eZBfLhTtQ5KxzU3CginmgGTmDCjk8TPP"],
        "accountExclude": ["FbfwE8ZmVdwUbbEXdq4ofhuUEiAxeSk5kaoYrJJekpnZ"],
        "accountRequired": ["As1XYY9RdGkjs62isDhLKG3yxMCMatnbanXrqU85XvXW"]
      },
      {
	"commitment": "processed",
    	"encoding": "base64",
    	"transaction_details": "full",
    	"showRewards": true,
    	"maxSupportedTransactionVersion": 0
      }
  ]
}

Example Notification:

{
    "jsonrpc": "2.0",
    "method": "transactionNotification",
    "params": {
        "subscription": 4743323479349712,
        "result": {
            "transaction": {
                "transaction": [
                    "Ae6zfSExLsJ/E1+q0jI+3ueAtSoW+6HnuDohmuFwagUo2BU4OpkSdUKYNI1dJfMOonWvjaumf4Vv1ghn9f3Avg0BAAEDGycH0OcYRpfnPNuu0DBQxTYPWpmwHdXPjb8y2P200JgK3hGiC2JyC9qjTd2lrug7O4cvSRUVWgwohbbefNgKQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA0HcpwKokfYDDAJTaF/TWRFWm0Gz5/me17PRnnywHurMBAgIAAQwCAAAAoIYBAAAAAAA=",
                    "base64"
                ],
                "meta": {
                    "err": null,
                    "status": {
                        "Ok": null
                    },
                    "fee": 5000,
                    "preBalances": [
                        28279852264,
                        158122684,
                        1
                    ],
                    "postBalances": [
                        28279747264,
                        158222684,
                        1
                    ],
                    "innerInstructions": [],
                    "logMessages": [
                        "Program 11111111111111111111111111111111 invoke [1]",
                        "Program 11111111111111111111111111111111 success"
                    ],
                    "preTokenBalances": [],
                    "postTokenBalances": [],
                    "rewards": null,
                    "loadedAddresses": {
                        "writable": [],
                        "readonly": []
                    },
                    "computeUnitsConsumed": 0
                }
            },
            "signature": "5moMXe6VW7L7aQZskcAkKGQ1y19qqUT1teQKBNAAmipzdxdqVLAdG47WrsByFYNJSAGa9TByv15oygnqYvP6Hn2p",
            "slot": 224341380
        }
    }
}

TransactionSubscribeFilter:

vote: Option<bool>: A flag to include/exclude vote-related transactions.

failed: Option<bool>: A flag to include/exclude transactions that failed.

signature: Option<String>: Filters updates to a specific transaction based on its signature.

accountInclude: Option<Vec<String>>: A list of accounts for which you want to receive transaction updates. This means that only one of the accounts must be included in the transaction updates (e.g., Account 1 OR Account 2).

accountExclude: Option<Vec<String>>: A list of accounts you want to exclude from transaction updates.

accountRequired: Option<Vec<String>>: Transactions must involve these specified accounts to be included in updates. This means that all of the accounts must be included in the transaction updates (e.g., Account 1 AND Account 2).

You can include up to 50 000 addresses in the accountsInclude, accountExclude and accountRequired arrays.

Optional - TransactionSubscribeOptions:

commitment: Option<Commitment>: Specifies the commitment level for fetching data, dictating at what stage of the transactions lifecycle updates are sent. The possible values are

processed
confirmed
finalized

encoding: Option<UiTransactionEncoding>: Sets the encoding format of the returned transaction data. The possible values are

base58
base64
jsonParsed

transactionDetails: Option<TransactionDetails> : Determines the level of detail for the returned transaction data. The possible values are

full
signatures
accounts
none

showRewards: Option<bool>: A boolean flag indicating if reward data should be included in the transaction updates.

maxSupportedTransactionVersion: Option<u8>: Specifies the highest version of transactions you want to receive updates for.

maxSupportedTransactionVersion is required for returning the accounts and full level details of a given transaction (i.e., transactionDetails: "accounts" | "full").

In this example we are subscribing to transactions that contain the Raydium account 675kPX9MHTjS2zt1qfr1NYHuzeLXfQM9H24wFSUt1Mp8. Whenever a transaction occurs that contains 675kPX9MHTjS2zt1qfr1NYHuzeLXfQM9H24wFSUt1Mp8in the accountKeys of the transaction, we will receive a websocket notification. Based on the subscription options, the transaction notification will be sent at the processed commitment level,jsonParsedencoding, full transaction details, and will show rewards.

Websockets have a 10-minute inactivity timer; It is heavily recommended to implement health checks and send pings every minute to keep the websocket connection alive.

const WebSocket = require('ws');

// Create a WebSocket connection
const ws = new WebSocket('wss://atlas-mainnet.helius-rpc.com/?api-key=<API_KEY>');

// Function to send a request to the WebSocket server
function sendRequest(ws) {
    const request = {
        jsonrpc: "2.0",
        id: 420,
        method: "transactionSubscribe",
        params: [
            {
                accountInclude: ["675kPX9MHTjS2zt1qfr1NYHuzeLXfQM9H24wFSUt1Mp8"]
            },
            {
                commitment: "processed",
                encoding: "jsonParsed",
                transactionDetails: "full",
                showRewards: true,
                maxSupportedTransactionVersion: 0
            }
        ]
    };
    ws.send(JSON.stringify(request));
}

// Function to send a ping to the WebSocket server
function startPing(ws) {
    setInterval(() => {
        if (ws.readyState === WebSocket.OPEN) {
            ws.ping();
            console.log('Ping sent');
        }
    }, 30000); // Ping every 30 seconds
}

// Define WebSocket event handlers

ws.on('open', function open() {
    console.log('WebSocket is open');
    sendRequest(ws);  // Send a request once the WebSocket is open
    startPing(ws);    // Start sending pings
});

ws.on('message', function incoming(data) {
    const messageStr = data.toString('utf8');
    try {
        const messageObj = JSON.parse(messageStr);
        console.log('Received:', messageObj);
    } catch (e) {
        console.error('Failed to parse JSON:', e);
    }
});

ws.on('error', function error(err) {
    console.error('WebSocket error:', err);
});

ws.on('close', function close() {
    console.log('WebSocket is closed');
});

Helius Websockets supports a method to subscribe to an account and receive notifications over the websocket connection when the lamports or data for a matching account public key changes. This method matches the Solana Websocket API accountSubscribe spec exactly. See the Solana docs for more: https://docs.solana.com/api/websocket#accountsubscribe

Example Payload:

{
  "jsonrpc": "2.0",
  "id": 420,
  "method": "accountSubscribe",
   "params": [
    "SysvarC1ock11111111111111111111111111111111",
    {
      "encoding": "jsonParsed",
      "commitment": "finalized"
    }
  ]
}

Example Notification:

{
    'jsonrpc': '2.0', 
    'method': 'accountNotification', 
    'params': 
        {
          'subscription': 237508762798666, 
          'result': 
           {
            'context': {'slot': 235781083}, 
            'value': 
             {
             'lamports': 1169280, 
             'data': 'BvEhEb6hixL3QPn41gHcyi2CDGKt381jbNKFFCQr6XDTzCTXCuSUG9D', 
             'owner': 'Sysvar1111111111111111111111111111111111111', 
             'executable': False, 
             'rentEpoch': 361, 
             'space': 40
             }
           }
        }
}

Parameters:

String: Account public key, sent in base58 format, required

object: Option<RpcAccountInfoConfig>: Optional object used to pass in encoding for the data returned in the AccountNotification and commitment

If nothing is passed into the object, the response will default to base58 encoding and a finalizedcommitment level.

pub struct RpcAccountInfoConfig {
    pub encoding: Option<UiAccountEncoding>, // supported values: base58, base64, base64+zstd, jsonParsed
    pub commitment: Option<CommitmentConfig>, // supported values: finalized, confirmed, processed - defaults to finalized
}

In this example we are subscribing to account changes for the account SysvarC1ock11111111111111111111111111111111 . Whenever a change occurs to the account data or the lamports for this account, we will see an update. This happens at a frequent interval for this specific account as the slot and unixTimestamp are both a part of the returned account data.

// Create a WebSocket connection
const ws = new WebSocket('wss://atlas-mainnet.helius-rpc.com?api-key=<API_KEY>');

// Function to send a request to the WebSocket server
function sendRequest(ws) {
    const request = {
        jsonrpc: "2.0",
        id: 420,
        method: "accountSubscribe",
        params: [
            "SysvarC1ock11111111111111111111111111111111", // pubkey of account we want to subscribe to
            {
                encoding: "jsonParsed", // base58, base64, base65+zstd, jsonParsed
                commitment: "confirmed", // defaults to finalized if unset
            }
        ]
    };
    ws.send(JSON.stringify(request));
}

// Function to send a ping to the WebSocket server
function startPing(ws) {
    setInterval(() => {
        if (ws.readyState === WebSocket.OPEN) {
            ws.ping();
            console.log('Ping sent');
        }
    }, 30000); // Ping every 30 seconds
}

// Define WebSocket event handlers

ws.on('open', function open() {
    console.log('WebSocket is open');
    sendRequest(ws);  // Send a request once the WebSocket is open
    startPing(ws);    // Start sending pings
});

ws.on('message', function incoming(data) {
    const messageStr = data.toString('utf8');
    try {
        const messageObj = JSON.parse(messageStr);
        console.log('Received:', messageObj);
    } catch (e) {
        console.error('Failed to parse JSON:', e);
    }
});

ws.on('error', function error(err) {
    console.error('WebSocket error:', err);
});

ws.on('close', function close() {
    console.log('WebSocket is closed');
});

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Last updated 14 days ago

What are Websockets?

Why Use Helius Websockets?

Standard Websockets

Helius' Geyser Enhanced Websockets (beta)

Subscription Endpoints

Transaction Subscribe

TransactionSubscribeFilter:

Optional - TransactionSubscribeOptions:

Transaction Subscribe code example:

Account Subscribe

Parameters:

Account Subscribe code example: