> ## Documentation Index > Fetch the complete documentation index at: https://docs.solanatracker.io/llms.txt > Use this file to discover all available pages before exploring further. # Wallet token balance > Recibe el cambio de balance de un token concreto para una wallet de Solana vía Datastream WebSocket para alertas granulares por token. ## SDK Example ```typescript theme={null} import { Datastream } from '@solana-tracker/data-api'; const dataStream = new Datastream({ wsUrl: 'wss://datastream.solanatracker.io/YOUR_API_KEY', }); dataStream.on('error', console.error); await dataStream.connect(); const sub = dataStream.subscribe.wallet('FbMxP3GVq8TQ36nbYgx4NP9iygMpwAwFWJwW81ioCiSF').tokenBalance('6p6xgHyF7AeE6TZkSmFsko444wqoP15icUSqi2jfGiPN').on((data) => { console.log(data); }); // sub.unsubscribe(); ``` ## AsyncAPI ````yaml es/datastream/wallet.json walletTokenBalance id: walletTokenBalance title: Wallet token balance description: Saldo de un token concreto servers: - id: production protocol: wss host: datastream.solanatracker.io bindings: [] variables: - id: apiKey description: Su clave API única de la suscripción a Data API defaultValue: YOUR_DATASTREAM_KEY allowedValues: [] examples: [] address: / parameters: [] bindings: [] operations: - &ref_2 id: subscribeToTokenBalance title: Subscribe to token balance description: Subscribe to token balance type: receive messages: - &ref_5 id: joinTokenBalance payload: - name: joinTokenBalance description: Subscribe to specific token balance type: object properties: - name: type type: string description: join required: true - name: room type: string description: Wallet token balance room required: true headers: [] jsonPayloadSchema: type: object required: - type - room properties: type: type: string const: join default: join x-parser-schema-id: room: type: string pattern: ^wallet:[A-Za-z0-9]{32,44}:[A-Za-z0-9]{32,44}:balance$ description: Wallet token balance room default: >- wallet:FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1:Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB:balance x-parser-schema-id: examples: - type: join room: >- wallet:FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1:Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB:balance x-parser-schema-id: title: Join token balance description: Subscribe to specific token balance example: |- { "type": "join", "room": "wallet:FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1:Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB:balance" } bindings: [] extensions: - id: x-parser-unique-object-id value: joinTokenBalance - id: x-parser-message-name value: joinTokenBalance bindings: [] extensions: &ref_1 - id: x-codeSamples value: &ref_8 - lang: typescript label: SDK source: > import { Datastream } from '@solana-tracker/data-api'; const dataStream = new Datastream({ wsUrl: 'wss://datastream.solanatracker.io/YOUR_API_KEY', }); dataStream.on('error', console.error); await dataStream.connect(); const sub = dataStream.subscribe.wallet('FbMxP3GVq8TQ36nbYgx4NP9iygMpwAwFWJwW81ioCiSF').tokenBalance('6p6xgHyF7AeE6TZkSmFsko444wqoP15icUSqi2jfGiPN').on((data) => { console.log(data); }); // sub.unsubscribe(); - id: x-parser-unique-object-id value: walletTokenBalance - &ref_4 id: receiveTokenBalanceData title: Receive token balance data description: Receive balance updates type: send messages: - &ref_7 id: tokenBalanceMessage payload: - name: tokenBalanceMessage description: Token balance change notification type: object properties: - name: type type: string description: message required: false - name: room type: string required: false - name: data type: object examples: &ref_0 - wallet: FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1 token: Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB amount: 78816.844996 - wallet: FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1 token: So11111111111111111111111111111111111111112 amount: 1.2345 required: false properties: - name: wallet type: string description: Wallet public key that received the balance update required: true - name: token type: string description: >- Token mint address. Native SOL uses the wrapped SOL mint `So11111111111111111111111111111111111111112` (same identifier for SOL balance updates on these rooms). required: true - name: amount type: number description: >- UI token amount after the update (decimal human units, not raw integer base units / lamports). Example: `78816.844996` for a fractional SPL balance. Use this value for display and reconciliation against UI balances; convert with mint decimals if you need raw integer amounts. required: true headers: [] jsonPayloadSchema: type: object properties: type: type: string const: message x-parser-schema-id: room: type: string x-parser-schema-id: data: type: object required: - wallet - token - amount properties: wallet: type: string description: Wallet public key that received the balance update x-parser-schema-id: token: type: string description: >- Token mint address. Native SOL uses the wrapped SOL mint `So11111111111111111111111111111111111111112` (same identifier for SOL balance updates on these rooms). x-parser-schema-id: amount: type: number description: >- UI token amount after the update (decimal human units, not raw integer base units / lamports). Example: `78816.844996` for a fractional SPL balance. Use this value for display and reconciliation against UI balances; convert with mint decimals if you need raw integer amounts. x-parser-schema-id: examples: *ref_0 x-parser-schema-id: BalanceUpdate examples: - type: message data: wallet: FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1 token: Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB amount: 76989.158861 room: >- wallet:FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1:Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB:balance x-parser-schema-id: title: Token balance message description: Token balance change notification example: |- { "type": "message", "data": { "wallet": "FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1", "token": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB", "amount": 76989.158861 }, "room": "wallet:FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1:Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB:balance" } bindings: [] extensions: - id: x-parser-unique-object-id value: tokenBalanceMessage - id: x-parser-message-name value: tokenBalanceMessage bindings: [] extensions: *ref_1 - &ref_3 id: unsubscribeFromTokenBalance title: Unsubscribe from token balance description: Unsubscribe type: receive messages: - &ref_6 id: leaveTokenBalance payload: - name: leaveTokenBalance description: Unsubscribe from token balance type: object properties: - name: type type: string description: leave required: true - name: room type: string required: true headers: [] jsonPayloadSchema: type: object required: - type - room properties: type: type: string const: leave default: leave x-parser-schema-id: room: type: string default: >- wallet:FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1:Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB:balance x-parser-schema-id: examples: - type: leave room: >- wallet:FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1:Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB:balance x-parser-schema-id: title: Leave token balance description: Unsubscribe from token balance example: |- { "type": "leave", "room": "wallet:FV1r15rbNKkJanXLheoJA7fXEq6NDuMJ3bukXuhJWyV1:Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB:balance" } bindings: [] extensions: - id: x-parser-unique-object-id value: leaveTokenBalance - id: x-parser-message-name value: leaveTokenBalance bindings: [] extensions: *ref_1 sendOperations: - *ref_2 - *ref_3 receiveOperations: - *ref_4 sendMessages: - *ref_5 - *ref_6 receiveMessages: - *ref_7 extensions: - id: x-codeSamples value: *ref_8 - id: x-parser-unique-object-id value: walletTokenBalance securitySchemes: - id: apiKeyAuth name: apiKey type: httpApiKey description: >- API key for authentication. Include your Datastream key in the connection URL: wss://datastream.solanatracker.io/{DATASTREAM_KEY} in: header extensions: [] ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.