> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sqd.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Track Token Transfers

> Monitor Solana SPL token transfers through the SQD Portal — sample queries for tracking mint and burn events, holder activity, and balance changes.

export const QueryInterfaceSolanaTokenTransfers = () => {
  const useCasesConfig = [{
    id: "usdc-token-transfers",
    name: "Track USDC token transfers",
    network: "solana-mainnet",
    payload: {
      type: "solana",
      fromBlock: 280000000,
      toBlock: 280000003,
      fields: {
        block: {
          number: true,
          timestamp: true
        },
        tokenBalance: {
          account: true,
          preMint: true,
          postMint: true,
          preAmount: true,
          postAmount: true,
          preOwner: true,
          postOwner: true
        }
      },
      tokenBalances: [{
        preMint: ["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"]
      }]
    }
  }];
  const [queryFormat, setQueryFormat] = useState("curl");
  const [useCase, setUseCase] = useState("usdc-token-transfers");
  const [response, setResponse] = useState("");
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState(null);
  const [viewMode, setViewMode] = useState("code");
  const [copied, setCopied] = useState(false);
  const generateCurlCommand = config => {
    const url = `https://portal.sqd.dev/datasets/${config.network}/stream`;
    const payload = JSON.stringify(config.payload, null, 2);
    return `curl --compressed -X POST '${url}' \\\n  -H 'Content-Type: application/json' \\\n  -d '${payload}'`;
  };
  useEffect(() => {
    setViewMode("code");
    setResponse("");
    setError(null);
  }, [useCase]);
  const handleRun = async () => {
    const selectedUseCase = useCasesConfig.find(uc => uc.id === useCase);
    if (!selectedUseCase) return;
    setViewMode("output");
    setLoading(true);
    setError(null);
    setResponse('');
    try {
      const url = `https://portal.sqd.dev/datasets/${selectedUseCase.network}/stream`;
      const response = await fetch(url, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json'
        },
        body: JSON.stringify(selectedUseCase.payload)
      });
      if (!response.ok) {
        throw new Error(`API request failed: ${response.status} ${response.statusText}`);
      }
      const text = await response.text();
      if (text.trim()) {
        const lines = text.trim().split('\n');
        const parsedData = lines.map((line, index) => {
          try {
            return JSON.parse(line);
          } catch (e) {
            return {
              error: `Failed to parse line ${index + 1}`,
              raw: line
            };
          }
        });
        const formattedOutput = parsedData.map(obj => JSON.stringify(obj, null, 2)).join('\n\n');
        setResponse(formattedOutput);
      } else {
        setResponse('No data returned from API');
      }
    } catch (err) {
      setError(err.message || 'An error occurred while fetching data');
      setResponse('');
    } finally {
      setLoading(false);
    }
  };
  return <div className="not-prose w-full my-6 sm:my-8">

      <div className="bg-white dark:bg-gray-950 rounded-xl p-4 sm:p-6 border border-gray-200 dark:border-gray-800 shadow-sm">
        <div className="flex flex-col sm:flex-row items-start sm:items-center gap-3 sm:gap-4 mb-4">
          <label className="text-sm font-semibold text-gray-700 dark:text-gray-300 whitespace-nowrap">
            Response
          </label>

          <div className="flex flex-wrap items-center gap-3 flex-1 w-full">
            <div className="relative flex-shrink-0">
              <select value={queryFormat} onChange={e => setQueryFormat(e.target.value)} className="appearance-none bg-gray-50 dark:bg-gray-900 border border-gray-300 dark:border-gray-700 rounded-xl px-4 py-2.5 pr-10 text-sm font-medium text-gray-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-[#2563eb] dark:focus:ring-[#2563eb] cursor-pointer transition-all">
                <option value="curl">curl</option>
              </select>
              <div className="absolute inset-y-0 right-0 flex items-center pr-3 pointer-events-none">
                <svg className="w-4 h-4 text-gray-500 dark:text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
                </svg>
              </div>
            </div>

            <div className="relative flex-shrink-0 flex-1 min-w-[200px]">
              <select value={useCase} onChange={e => setUseCase(e.target.value)} className="appearance-none w-full bg-gray-50 dark:bg-gray-900 border border-gray-300 dark:border-gray-700 rounded-xl px-4 py-2.5 pr-10 text-sm font-medium text-gray-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-[#2563eb] dark:focus:ring-[#2563eb] cursor-pointer transition-all">
                {useCasesConfig.map(uc => <option key={uc.id} value={uc.id}>
                    {uc.name}
                  </option>)}
              </select>
              <div className="absolute inset-y-0 right-0 flex items-center pr-3 pointer-events-none">
                <svg className="w-4 h-4 text-gray-500 dark:text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
                </svg>
              </div>
            </div>

            <button onClick={handleRun} type="button" disabled={loading} className="flex items-center gap-2 bg-[#2563eb] hover:bg-[#1e40af] dark:bg-[#2563eb] dark:hover:bg-[#1e40af] disabled:bg-gray-400 disabled:cursor-not-allowed text-white font-semibold px-6 py-2.5 rounded-xl transition-all duration-200 focus:outline-none focus:ring-2 focus:ring-[#2563eb] focus:ring-offset-2 dark:focus:ring-offset-gray-950 whitespace-nowrap shadow-sm hover:shadow-md">
              {loading ? <>
                  <svg className="animate-spin h-4 w-4" fill="none" viewBox="0 0 24 24">
                    <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4"></circle>
                    <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                  </svg>
                  Loading...
                </> : <>
                  <svg className="w-4 h-4" fill="currentColor" viewBox="0 0 20 20">
                    <path d="M6.3 2.841A1.5 1.5 0 004 4.11V15.89a1.5 1.5 0 002.3 1.269l9.344-5.89a1.5 1.5 0 000-2.538L6.3 2.84z" />
                  </svg>
                  RUN
                </>}
            </button>
          </div>
        </div>

        {error && <div className="mt-4 p-4 bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 rounded-xl">
            <p className="text-sm text-red-800 dark:text-red-200 font-medium">Error: {error}</p>
          </div>}

        <div className="mt-4 bg-gray-50 dark:bg-gray-950 border border-gray-200 dark:border-gray-800 rounded-xl overflow-hidden h-[450px] flex flex-col">
          <div className="bg-gray-100 dark:bg-gray-900 border-b border-gray-200 dark:border-gray-800 px-4 py-2.5 flex items-center justify-between">
            <span className="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase tracking-wide">
              {viewMode === "code" ? "Request" : "Response"}
            </span>
            <button onClick={() => {
    const textToCopy = viewMode === "code" ? generateCurlCommand(useCasesConfig.find(uc => uc.id === useCase)) : response;
    navigator.clipboard.writeText(textToCopy);
    setCopied(true);
    setTimeout(() => setCopied(false), 2000);
  }} className={`flex items-center gap-1.5 transition-colors ${copied ? "text-[#2563eb] dark:text-[#60a5fa]" : "text-gray-500 hover:text-[#2563eb] dark:text-gray-400 dark:hover:text-[#60a5fa]"}`} title={copied ? "Copied!" : "Copy to clipboard"}>
              {copied ? <>
                  <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 13l4 4L19 7" />
                  </svg>
                  <span className="text-xs font-medium">Copied!</span>
                </> : <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                </svg>}
            </button>
          </div>
          <div className="flex-1 overflow-auto p-3 bg-gray-50 dark:bg-gray-950">
            {loading ? <div className="flex items-center justify-center h-full">
                <div className="text-sm text-gray-500 dark:text-gray-400">Fetching data from Portal API...</div>
              </div> : viewMode === "code" ? <div key={`code-${useCase}`} style={{
    position: 'relative'
  }}>
                <pre style={{
    margin: 0,
    padding: '1rem',
    background: 'var(--hl-bg)',
    borderRadius: '0.75rem',
    overflow: 'auto',
    fontSize: '0.875rem',
    lineHeight: '1.5',
    fontFamily: 'ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace',
    color: 'var(--hl-cmd)'
  }}>
                  <code key={`curl-code-${useCase}`} style={{
    counterReset: 'line'
  }}>
                    {generateCurlCommand(useCasesConfig.find(uc => uc.id === useCase)).trim().split('\n').map((line, i) => <div key={`curl-line-${i}`} style={{
    display: 'flex',
    position: 'relative',
    paddingLeft: '3.5em',
    minHeight: '1.5em',
    lineHeight: '1.5'
  }}>
                        <span style={{
    position: 'absolute',
    left: 0,
    width: '2.5em',
    textAlign: 'right',
    color: 'var(--hl-line-num)',
    userSelect: 'none',
    paddingRight: '1em',
    lineHeight: '1.5'
  }}>{i + 1}</span>
                        <span style={{
    whiteSpace: 'pre-wrap',
    wordBreak: 'break-word',
    color: 'var(--hl-cmd)',
    lineHeight: '1.5'
  }}>
                          {line.includes('curl') && <span style={{
    color: 'var(--hl-key)'
  }}>{line}</span>}
                          {!line.includes('curl') && line.match(/^\s*-[XHd]/) && <>
                              <span style={{
    color: 'var(--hl-flag)'
  }}>{line.match(/^\s*-[XHd]/)[0]}</span>
                              <span style={{
    color: 'var(--hl-cmd)'
  }}>{line.substring(line.match(/^\s*-[XHd]/)[0].length)}</span>
                            </>}
                          {!line.includes('curl') && !line.match(/^\s*-[XHd]/) && line.match(/'[^']*'/) && <>
                              {line.split(/'([^']*)'/).map((part, j) => j % 2 === 1 ? <span key={`curl-part-${i}-${j}`} style={{
    color: 'var(--hl-str)'
  }}>'{part}'</span> : <span key={`curl-part-${i}-${j}`} style={{
    color: 'var(--hl-cmd)'
  }}>{part}</span>)}
                            </>}
                          {!line.includes('curl') && !line.match(/^\s*-[XHd]/) && !line.match(/'[^']*'/) && <span style={{
    color: 'var(--hl-cmd)'
  }}>{line}</span>}
                        </span>
                      </div>)}
                  </code>
                </pre>
              </div> : response ? <div key={`response-${useCase}-${response.length}`} style={{
    position: 'relative'
  }}>
                <pre style={{
    margin: 0,
    padding: '1rem',
    background: 'var(--hl-bg)',
    borderRadius: '0.75rem',
    overflow: 'auto',
    fontSize: '0.875rem',
    lineHeight: '1.5',
    fontFamily: 'ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace',
    color: 'var(--hl-cmd)'
  }}>
                  <code key={`response-code-${useCase}-${response.length}`}>
                    {response.trim().split('\n').map((line, i) => <div key={`response-line-${i}`} style={{
    display: 'flex',
    position: 'relative',
    paddingLeft: '3.5em',
    minHeight: '1.5em',
    lineHeight: '1.5'
  }}>
                        <span style={{
    position: 'absolute',
    left: 0,
    width: '2.5em',
    textAlign: 'right',
    color: 'var(--hl-line-num)',
    userSelect: 'none',
    paddingRight: '1em',
    lineHeight: '1.5'
  }}>{i + 1}</span>
                        <span style={{
    whiteSpace: 'pre-wrap',
    wordBreak: 'break-word',
    color: 'var(--hl-cmd)',
    lineHeight: '1.5'
  }}>
                          {line.match(/"[^"]+":/) ? <>
                              {line.split(/("[^"]+":)/).map((part, j) => part.match(/^"[^"]+":$/) ? <span key={`resp-part-${i}-${j}`} style={{
    color: 'var(--hl-flag)'
  }}>{part}</span> : part.match(/^"[^"]+"$/) ? <span key={`resp-part-${i}-${j}`} style={{
    color: 'var(--hl-str)'
  }}>{part}</span> : <span key={`resp-part-${i}-${j}`} style={{
    color: 'var(--hl-cmd)'
  }}>{part}</span>)}
                            </> : <span style={{
    color: 'var(--hl-cmd)'
  }}>{line}</span>}
                        </span>
                      </div>)}
                  </code>
                </pre>
              </div> : <div className="text-sm text-gray-500 dark:text-gray-400 text-center h-full flex items-center justify-center">
                No data returned from API
              </div>}
          </div>
        </div>
      </div>
    </div>;
};

Track SPL token transfers to build token analytics, monitor wallet activity, or analyze token flow patterns.

## Use Case

Token transfer tracking enables you to:

* Build token transfer analytics and volume trackers
* Monitor wallet token activity
* Analyze transfer patterns
* Track token mints and burns

## Code Example

<CodeGroup>
  ```bash curl theme={"system"}
  curl --compressed -X POST "https://portal.sqd.dev/datasets/solana-mainnet/stream" \
    -H 'Content-Type: application/json' \
    -d '{
      "type": "solana",
      "fromBlock": 280000000,
      "toBlock": 280000003,
      "fields": {
        "block": {
          "number": true,
          "timestamp": true
        },
        "tokenBalance": {
          "account": true,
          "preMint": true,
          "postMint": true,
          "preAmount": true,
          "postAmount": true,
          "preOwner": true,
          "postOwner": true
        }
      },
      "tokenBalances": [{
        "preMint": ["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"]
      }]
    }'
  ```

  ```typescript TypeScript theme={"system"}
  import { DataSource } from "@subsquid/portal-client";

  const dataSource = new DataSource({
    network: "solana-mainnet",
  });

  // USDC mint address
  const USDC_MINT = "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v";

  const blocks = await dataSource.getBlocks({
    from: 280000000,
    to: 280000003,
    fields: {
      block: { number: true, timestamp: true },
      tokenBalance: {
        account: true,
        preMint: true,
        postMint: true,
        preAmount: true,
        postAmount: true,
        preOwner: true,
        postOwner: true,
      },
    },
    tokenBalances: [
      {
        preMint: [USDC_MINT],
      },
    ],
  });

  // Process token transfers
  for (const block of blocks) {
    for (const balance of block.tokenBalances) {
      if (balance.preAmount !== balance.postAmount) {
        const amount = BigInt(balance.postAmount) - BigInt(balance.preAmount);
        console.log({
          slot: block.header.number,
          timestamp: block.header.timestamp,
          account: balance.account,
          mint: balance.postMint,
          from: balance.preOwner,
          to: balance.postOwner,
          amount: amount.toString(),
        });
      }
    }
  }
  ```

  ```python Python theme={"system"}
  import requests
  import json

  url = "https://portal.sqd.dev/datasets/solana-mainnet/stream"
  headers = {"Content-Type": "application/json"}

  # USDC mint address
  usdc_mint = "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"

  payload = {
      "type": "solana",
      "fromBlock": 280000000,
      "toBlock": 280000003,
      "fields": {
          "block": {
              "number": True,
              "timestamp": True
          },
          "tokenBalance": {
              "account": True,
              "preMint": True,
              "postMint": True,
              "preAmount": True,
              "postAmount": True,
              "preOwner": True,
              "postOwner": True
          }
      },
      "tokenBalances": [{
          "preMint": [usdc_mint]
      }]
  }

  response = requests.post(url, headers=headers, json=payload)

  for line in response.text.strip().split('\n'):
      block = json.loads(line)
      for balance in block.get('tokenBalances', []):
          if balance['preAmount'] != balance['postAmount']:
              amount = int(balance['postAmount']) - int(balance['preAmount'])
              print({
                  "slot": block['header']['number'],
                  "timestamp": block['header']['timestamp'],
                  "account": balance['account'],
                  "mint": balance['postMint'],
                  "from": balance['preOwner'],
                  "to": balance['postOwner'],
                  "amount": amount
              })
  ```
</CodeGroup>

<Info>Try it yourself with the interactive query interface below:</Info>

<QueryInterfaceSolanaTokenTransfers />

## Key Parameters

| Parameter    | Description                                |
| ------------ | ------------------------------------------ |
| `preMint`    | Token mint address before the transaction  |
| `postMint`   | Token mint address after the transaction   |
| `preAmount`  | Token balance before the transaction       |
| `postAmount` | Token balance after the transaction        |
| `preOwner`   | Token account owner before the transaction |
| `postOwner`  | Token account owner after the transaction  |
| `account`    | Token account address                      |

## Expected Output

```json theme={"system"}
{
  "header": {
    "number": 259985000,
    "timestamp": 1697544779
  },
  "tokenBalances": [
    {
      "account": "TokenAccountAddress...",
      "preMint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "postMint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "preAmount": "1000000",
      "postAmount": "2000000",
      "preOwner": "SenderAddress...",
      "postOwner": "RecipientAddress..."
    }
  ]
}
```

## Track Specific Token Account

Monitor transfers for a specific token account:

<CodeGroup>
  ```bash curl theme={"system"}
  curl --compressed -X POST "https://portal.sqd.dev/datasets/solana-mainnet/stream" \
    -H 'Content-Type: application/json' \
    -d '{
      "type": "solana",
      "fromBlock": 280000000,
      "toBlock": 280000003,
      "fields": {
        "tokenBalance": {
          "account": true,
          "preAmount": true,
          "postAmount": true
        }
      },
      "tokenBalances": [{
        "account": ["SpecificTokenAccountAddress"]
      }]
    }'
  ```

  ```typescript TypeScript theme={"system"}
  const blocks = await dataSource.getBlocks({
    from: 280000000,
    to: 280000003,
    fields: {
      tokenBalance: { account: true, preAmount: true, postAmount: true },
    },
    tokenBalances: [
      {
        account: ["SpecificTokenAccountAddress"],
      },
    ],
  });
  ```

  ```python Python theme={"system"}
  payload = {
      "type": "solana",
      "fromBlock": 280000000,
      "toBlock": 280000003,
      "fields": {
          "tokenBalance": {
              "account": True,
              "preAmount": True,
              "postAmount": True
          }
      },
      "tokenBalances": [{
          "account": ["SpecificTokenAccountAddress"]
      }]
  }
  ```
</CodeGroup>

## Performance Tips

1. **Filter by mint**: Query specific tokens instead of all transfers
2. **Use slot ranges**: Process data in 10k-50k slot batches
3. **Request minimal fields**: Only request fields you need
4. **Filter by account**: Monitor specific token accounts

## Related Examples

<CardGroup cols={2}>
  <Card title="Query Instructions" icon="code" href="/en/portal/solana/examples/query-instructions">
    Track program instructions
  </Card>

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    Track DEX trading activity
  </Card>

  <Card title="Query Transactions" icon="arrow-right-arrow-left" href="/en/portal/solana/examples/query-transactions">
    Monitor wallet activity
  </Card>

  <Card title="API Reference" icon="book" href="/en/portal/solana/api">
    View complete API docs
  </Card>
</CardGroup>