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

# Data Types

> Explore the blockchain payloads feeds can process.

# Data Types

Each feed subscribes to one blockchain payload type. The selected data type determines the shape passed to `main(stream)` in your filter.

## `BlockWithTransactions`

Use this for native token transfers and transaction-level monitoring.

```json theme={null}
{
  "metadata": { "networkId": "ethereum-mainnet", "blockNumber": "123", "isReorg": false },
  "block": {
    "number": "0x7b",
    "hash": "0x...",
    "timestamp": "0x...",
    "transactions": [
      { "hash": "0x...", "from": "0x...", "to": "0x...", "value": "0x..." }
    ]
  }
}
```

## `BlockWithLogs`

Use this for contract events, including ERC-20 `Transfer` logs.

```json theme={null}
{
  "metadata": { "networkId": "ethereum-mainnet", "blockNumber": "123", "isReorg": false },
  "logs": [
    { "address": "0x...", "transactionHash": "0x...", "data": "0x...", "topics": ["0x..."] }
  ]
}
```

## `BlockWithTraces`

Use this for debug trace workflows.

```json theme={null}
{
  "metadata": { "networkId": "ethereum-mainnet", "blockNumber": "123", "isReorg": false },
  "traces": []
}
```

## Choosing a Type

* Use transactions for native transfers.
* Use logs for emitted smart contract events.
* Use traces for internal calls and execution-level analysis.