# accountSubscribe – Solana

{% hint style="success" %}
The **accountSubscribe** RPC Solana method is often used in dApps to track account balance changes and state modifications.
{% endhint %}

It provides a subscription ID that can be used to unsubscribe later. The notification format is similar to the getAccountInfo method's response.

### Supported Networks

* Mainnet

### Parameters

#### Required Parameters

* **`string`** (required): The account Pubkey as a base-58 encoded string.

#### Optional Parameters

* **`object`** (optional): A configuration object containing:
  * **commitment** (`string`): Commitment level to observe.
  * **encoding** (`string`): The encoding format for the account data.
    * Supported: `base58`, `base64`, `base64+zstd`, `jsonParsed`.

### Result

The response returns a subscription ID required to unsubscribe from the account notifications.

#### Result Format

* `number`: The subscription ID.

### Request Example

#### API Endpoints

```json
wss://go.getblock.io/<ACCESS-TOKEN>/
```

#### JSON-RPC Request

{% tabs %}
{% tab title="curl" %}

```json
wscat -c "wss://go.getblock.io/<ACCESS-TOKEN>/" -x '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "accountSubscribe",
    "params": [
      "CM78CPUeXjn8o3yroDHxUtKsZZgoy4GPkPPXfouKNH12",
      {
        "encoding": "jsonParsed",
        "commitment": "finalized"
      }
    ]
}'

```

{% endtab %}
{% endtabs %}

### Response

A successful request returns a subscription ID.

#### Example Response

```json
{
  "jsonrpc": "2.0",
  "result": 23784,
  "id": 1
}
```

In this response:

* `result`: The subscription ID assigned to this account.

### Notification Formats

#### Base58 Encoding

```json
{
  "jsonrpc": "2.0",
  "method": "accountNotification",
  "params": {
    "result": {
      "context": {
        "slot": 5199307
      },
      "value": {
        "data": [
          "11116bv5nS2h3y12kD1yUKeMZvGcKLSjQgX6BeV7u1FrjeJcKfsHPXHRDEHrBesJhZyqnnq9qJeUuF7WHxiuLuL5twc38w2TXNLxnDbjmuR",
          "base58"
        ],
        "executable": false,
        "lamports": 33594,
        "owner": "11111111111111111111111111111111",
        "rentEpoch": 635,
        "space": 80
      }
    },
    "subscription": 23784
  }
}
```

#### Parsed JSON Encoding

```json
{
  "jsonrpc": "2.0",
  "method": "accountNotification",
  "params": {
    "result": {
      "context": {
        "slot": 5199307
      },
      "value": {
        "data": {
          "program": "nonce",
          "parsed": {
            "type": "initialized",
            "info": {
              "authority": "Bbqg1M4YVVfbhEzwA9SpC9FhsaG83YMTYoR4a8oTDLX",
              "blockhash": "LUaQTmM7WbMRiATdMMHaRGakPtCkc2GHtH57STKXs6k",
              "feeCalculator": {
                "lamportsPerSignature": 5000
              }
            }
          }
        },
        "executable": false,
        "lamports": 33594,
        "owner": "11111111111111111111111111111111",
        "rentEpoch": 635,
        "space": 80
      }
    }
  }
}
```

### Error Handling

Common accountSubscribe error scenarios:

* Invalid Pubkey: Incorrect account Pubkey.
* Unsupported encoding: Invalid encoding format.
* Network issues: Connectivity problems with Solana JSON-RPC API endpoints.

#### Example Error Response

```json
{
  "jsonrpc": "2.0",
  "error": {
    "code": -32602,
    "message": "Invalid Pubkey"
  },
  "id": 1
}
```

### Use Cases

The Solana accountSubscribe method is essential for:

* Real-time account balance monitoring;
* Tracking smart contract state changes;
* Enabling event-driven dApp functionality;

### Code accountSubscribe Example – Web3 Integration

{% tabs %}
{% tab title="JavaScript" %}

```javascript
const WebSocket = require('ws');

const ws = new WebSocket("wss://go.getblock.io/<ACCESS-TOKEN>/");

ws.on('open', () => {
  const payload = {
    jsonrpc: "2.0",
    id: 1,
    method: "accountSubscribe",
    params: [
      "CM78CPUeXjn8o3yroDHxUtKsZZgoy4GPkPPXfouKNH12",
      {
        encoding: "jsonParsed",
        commitment: "finalized"
      }
    ]
  };
  ws.send(JSON.stringify(payload));
});

ws.on('message', (data) => {
  console.log("Subscription Update:", JSON.parse(data));
});

ws.on('error', (error) => {
  console.error("WebSocket error:", error.message);
});

ws.on('close', () => {
  console.log("WebSocket connection closed");
});
```

{% endtab %}
{% endtabs %}

### Integration with Web3

By integrating Web3 **accountSubscribe** into Solana's Core API, developers can monitor account changes, optimize dApp performance, and enable responsive features. This method is vital for Web3 applications that depend on real-time data updates.


---

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