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

# Raw Data Streams Overview

> Subscribe to canonical blockchain primitives in real-time: blocks, transactions, logs, and more.

## Overview

The Raw Data streams provide push-based access to on-chain execution artifacts as they are finalized. These streams deliver the foundational blockchain primitives that power all derived datasets.

## Stream Matrix

| Stream | Summary | Dataset ID |
| :- | :- | :- |
| [Blocks](/wss-reference/evm/primitives/blocks) | Real-time canonical EVM block headers | `0101` |
| [Transactions](/wss-reference/evm/primitives/transactions) | Executed transactions with gas accounting | `0102` |
| [Logs](/wss-reference/evm/primitives/logs) | Decoded event logs with topic filters | `0103` |
| [Internal transactions](/wss-reference/evm/primitives/internal-transactions) | Call traces | `0111` |
| [Contracts](/wss-reference/evm/primitives/contracts) | Contract deployment metadata | `0121` |
| [Function results](/wss-reference/evm/primitives/function-results) | Deterministic contract call outputs | `0122` |

## Parameter Conventions

All primitive streams support the following parameters in the `subscribe` message:

<ParamField body="chain_id" type="number" required>
  Chain identifier for the target EVM network. See [Chain enumeration](/api-reference/enumerations/chain) for supported values.
</ParamField>

### Filters

* **Blocks**: No additional filters.
* **Transactions**: `from_addresses`, `to_addresses`, `status_success`.
* **Logs**: `contract_addresses`, `topic_zeros`.
* **Internal transactions**: `from_addresses`, `to_addresses`, `call_types`.
* **Contracts**: `contract_addresses`.
* **Function results**: `contract_addresses`, `signature_hashes`.

## Usage Guidance

* **Reorg Awareness** — Streams handle reorgs by emitting update or delete events when the canonical chain changes.
* **Lineage** — Each record includes a `_tracing_id` to correlate with archive data.
* **Filtering** — Use topic filters for logs to reduce bandwidth for high-volume contracts.

## See Also

* [Introduction](/wss-reference/overview/introduction) — Protocol and authentication details.
* [WSS Error Codes](/troubleshooting/error-codes/wss/home) — Connection troubleshooting.


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