> ## 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.

# Monitor Contract Deployments

> Track new EVM smart contract deployments through the SQD Portal — sample queries to detect contract creation transactions across any supported chain.

export const QueryInterfaceContractDeployments = () => {
  const useCasesConfig = [{
    id: "contract-deployments",
    name: "Track contract deployments",
    network: "ethereum-mainnet",
    payload: {
      type: "evm",
      fromBlock: 20000000,
      toBlock: 20000003,
      fields: {
        block: {
          number: true,
          timestamp: true
        },
        trace: {
          type: true,
          createFrom: true,
          createResultAddress: true
        }
      },
      traces: [{
        type: ["create", "create2"]
      }]
    }
  }];
  const [queryFormat, setQueryFormat] = useState("curl");
  const [useCase, setUseCase] = useState("contract-deployments");
  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>;
};

Find all new smart contract deployments in a block range to track protocol launches, analyze deployment patterns, or monitor for security research.

## Use Case

Contract deployment monitoring helps you:

* Track new protocol and dApp launches
* Analyze deployment patterns and trends
* Monitor for security research and auditing
* Build contract discovery tools

## Code Example

<CodeGroup>
  ```bash curl theme={"system"}
  curl --compress -X POST "https://portal.sqd.dev/datasets/ethereum-mainnet/stream" \
    -H 'Content-Type: application/json' \
    -d '{
      "type": "evm",
      "fromBlock": 20000000,
      "toBlock": 20000003,
      "fields": {
        "block": {
          "number": true,
          "timestamp": true
        },
        "trace": {
          "type": true,
          "createFrom": true,
          "createResultAddress": true
        }
      },
      "traces": [{
        "type": ["create"]
      }]
    }'
  ```

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

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

  const blocks = await dataSource.getBlocks({
    from: 20000000,
    to: 20000003,
    fields: {
      block: { number: true, timestamp: true },
      trace: {
        type: true,
        createFrom: true,
        createResultAddress: true,
      },
    },
    traces: [
      {
        type: ["create"],
      },
    ],
  });

  // Process deployments from traces
  // Traces with type "create" indicate contract deployments
  for (const block of blocks) {
    for (const trace of block.traces) {
      if (trace.type === "create") {
        console.log({
          blockNumber: block.header.number,
          timestamp: block.header.timestamp,
          deployer: trace.createFrom,
          contractAddress: trace.result?.address || trace.createResultAddress,
          type: trace.type,
        });
      }
    }
  }
  ```

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

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

  payload = {
      "type": "evm",
      "fromBlock": 20000000,
      "toBlock": 20000003,
      "fields": {
          "block": {
              "number": True,
              "timestamp": True
          },
          "trace": {
              "type": True,
              "createFrom": True,
              "createResultAddress": True
          }
      },
      "traces": [{
          "type": ["create"]
      }]
  }

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

  # Process deployments from traces
  # Traces with type "create" indicate contract deployments
  for line in response.text.strip().split('\n'):
      block = json.loads(line)
      for trace in block.get('traces', []):
          if trace.get('type') == 'create':
              print({
                  "blockNumber": block['header']['number'],
                  "timestamp": block['header']['timestamp'],
                  "deployer": trace.get('createFrom'),
                  "contractAddress": (trace.get('result') or {}).get('address') or trace.get('createResultAddress'),
                  "type": trace.get('type')
              })
  ```
</CodeGroup>

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

<QueryInterfaceContractDeployments />

## Key Parameters

| Parameter             | Description                                          |
| --------------------- | ---------------------------------------------------- |
| `type`                | Trace type: `"create"` for contract deployments      |
| `createResultAddress` | Address of the newly deployed contract               |
| `createFrom`          | Deployer address (caller of CREATE)                  |
| `trace`               | Internal transaction trace showing contract creation |

<Note>
  Use traces with `type: ["create"]` to filter for contract deployments. The `createResultAddress` field contains the newly deployed contract address.
</Note>

## Expected Output

```json theme={"system"}
{
  "header": {
    "number": 20000001,
    "timestamp": 1705173443
  },
  "traces": [
    {
      "type": "create",
      "createFrom": "0xa9d1e08c7793af67e9d92fe308d5697fb81d3e43",
      "result": {
        "address": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb7"
      }
    }
  ]
}
```

## Filter by Deployer

Track deployments from a specific address:

<CodeGroup>
  ```bash curl theme={"system"}
  curl --compress -X POST "https://portal.sqd.dev/datasets/ethereum-mainnet/stream" \
    -H 'Content-Type: application/json' \
    -d '{
      "type": "evm",
      "fromBlock": 20000000,
      "toBlock": 20000003,
      "fields": {
        "transaction": {
          "hash": true,
          "from": true,
          "contractAddress": true
        }
      },
      "transactions": [{
        "from": ["0x1234567890123456789012345678901234567890"]
      }]
    }'
  ```

  ```typescript TypeScript theme={"system"}
  const DEPLOYER = "0x1234567890123456789012345678901234567890";

  const blocks = await dataSource.getBlocks({
    from: 20000000,
    to: 20000003,
    fields: {
      transaction: { hash: true, from: true, contractAddress: true },
    },
    transactions: [
      {
        from: [DEPLOYER],
      },
    ],
  });

  // Filter for deployments (contractAddress is populated)
  for (const block of blocks) {
    for (const tx of block.transactions) {
      if (tx.contractAddress) {
        console.log({
          deployer: tx.from,
          contractAddress: tx.contractAddress,
          txHash: tx.hash,
        });
      }
    }
  }
  ```

  ```python Python theme={"system"}
  deployer = "0x1234567890123456789012345678901234567890"

  payload = {
      "type": "evm",
      "fromBlock": 20000000,
      "toBlock": 20000003,
      "fields": {
          "transaction": {
              "hash": True,
              "from": True,
              "contractAddress": True
          }
      },
      "transactions": [{
          "from": [deployer]
      }]
  }

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

  # Filter for deployments (contractAddress is populated)
  for line in response.text.strip().split('\n'):
      block = json.loads(line)
      for tx in block.get('transactions', []):
          if tx.get('contractAddress'):
              print({
                  "deployer": tx['from'],
                  "contractAddress": tx['contractAddress'],
                  "txHash": tx['hash']
              })
  ```
</CodeGroup>

## Analyze Bytecode Size

Group deployments by bytecode size to find patterns:

<CodeGroup>
  ```typescript TypeScript theme={"system"}
  const deployments = [];

  for (const block of blocks) {
    for (const tx of block.transactions) {
      if (tx.contractAddress) {
        const bytecodeSize = tx.input.length / 2 - 1; // Convert hex to bytes
        
        deployments.push({
          address: tx.contractAddress,
          deployer: tx.from,
          bytecodeSize,
          block: block.header.number,
        });
      }
    }
  }

  // Find large contracts (>24KB, near the limit)
  const largeContracts = deployments.filter(d => d.bytecodeSize > 24000);
  console.log(`Found ${largeContracts.length} contracts near the 24KB limit`);
  ```
</CodeGroup>

<Tip>
  Ethereum has a 24KB contract size limit. Contracts approaching this limit may use proxy patterns or optimizations.
</Tip>

## Detect Proxy Patterns

Identify potential proxy deployments by bytecode patterns:

<CodeGroup>
  ```typescript TypeScript theme={"system"}
  // Simple heuristic: small bytecode often indicates a proxy
  const MIN_PROXY_SIZE = 50;   // Minimal proxy is ~45 bytes
  const MAX_PROXY_SIZE = 500;  // Most proxies are under 500 bytes

  for (const block of blocks) {
    for (const tx of block.transactions) {
      if (tx.contractAddress) {
        const bytecodeSize = tx.input.length / 2 - 1;
        
        if (bytecodeSize >= MIN_PROXY_SIZE && bytecodeSize <= MAX_PROXY_SIZE) {
          console.log({
            possibleProxy: tx.contractAddress,
            bytecodeSize,
            deployer: tx.from,
          });
        }
      }
    }
  }
  ```
</CodeGroup>

## Track Factory Deployments

Monitor contracts deployed by factory contracts:

<CodeGroup>
  ```typescript TypeScript theme={"system"}
  // Track contracts created via factory patterns
  // Factory deployments appear as internal transactions (traces)

  const blocks = await dataSource.getBlocks({
    from: 20000000,
    to: 20000003,
    fields: {
      trace: {
        type: true,
        from: true,
        createResultAddress: true,
        createResultCode: true,
      },
    },
    traces: [
      {
        type: ["create"],
        callFrom: ["0xYourFactoryAddress"],
      },
    ],
  });

  for (const block of blocks) {
    for (const trace of block.traces) {
      if (trace.createResultAddress) {
        console.log({
          factory: trace.callFrom || trace.createFrom,
          deployed: trace.createResultAddress,
          type: trace.type,
        });
      }
    }
  }
  ```
</CodeGroup>

<Warning>
  Factory-deployed contracts don't appear as regular transactions. Use trace queries with `type: ["create"]` instead.
</Warning>

## Performance Tips

1. **Request minimal fields**: Omit `input` if you don't need bytecode
2. **Use block ranges**: Process 10k-50k blocks at a time
3. **Filter by deployer**: When tracking specific addresses
4. **Post-process bytecode**: Analyze bytecode in your application

## Related Examples

<CardGroup cols={2}>
  <Card title="Query Transactions" icon="arrow-right-arrow-left" href="/en/portal/evm/examples/query-transactions">
    Monitor transaction activity
  </Card>

  <Card title="Query Traces" icon="diagram-project" href="/en/portal/evm/examples/query-traces">
    Track factory deployments with traces
  </Card>

  <Card title="Query Event Logs" icon="file-lines" href="/en/portal/evm/examples/query-logs">
    Monitor contract events
  </Card>

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