> ## 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.

# Streams Overview

> Index of BlockDB WebSocket (WSS) streams for real-time EVM data.

## Overview

WebSocket streams mirror Historic REST datasets. Subscribe with `action`, `chain_id`, `dataset_id`, and `params` as in [Introduction](/wss-reference/overview/introduction). Dataset IDs match [Dataset ID](/api-reference/enumerations/dataset-id).

## Stream matrix

| Dataset | Stream                                                                       |
| :------ | :--------------------------------------------------------------------------- |
| `0101`  | [Blocks](/wss-reference/evm/primitives/blocks)                               |
| `0102`  | [Transactions](/wss-reference/evm/primitives/transactions)                   |
| `0103`  | [Logs](/wss-reference/evm/primitives/logs)                                   |
| `0111`  | [Internal transactions](/wss-reference/evm/primitives/internal-transactions) |
| `0121`  | [Contracts](/wss-reference/evm/primitives/contracts)                         |
| `0122`  | [Function results](/wss-reference/evm/primitives/function-results)           |
| `0201`  | [ERC-20](/wss-reference/evm/entities/tokens-erc20)                           |
| `0202`  | [ERC-721](/wss-reference/evm/entities/tokens-erc721)                         |
| `0203`  | [ERC-1155](/wss-reference/evm/entities/tokens-erc1155)                       |
| `0211`  | [Pools](/wss-reference/evm/entities/pools)                                   |
| `0212`  | [Fee terms](/wss-reference/evm/entities/fee-terms)                           |
| `0301`  | [Reserves](/wss-reference/evm/reserves/reserves)                             |
| `0302`  | [Swap prints](/wss-reference/evm/prices/crypto/prices-spot-prints)           |
| `0303`  | [Swap fees](/wss-reference/evm/swaps/swap-fees)                              |
| `0304`  | [Token transfers](/wss-reference/evm/transfers/token-transfers)              |
| `0305`  | [Flash loan prints](/wss-reference/evm/flash-loans/flash-loan-prints)        |
| `0404`  | [OHLC](/wss-reference/evm/prices/crypto/prices-spot-ohlc)                    |
| `0405`  | [VWAP](/wss-reference/evm/prices/crypto/prices-spot-vwap)                    |
| `0501`  | [Fiat VWAP (USD)](/wss-reference/evm/prices/fiat/prices-spot-vwap-fiat)      |
| `0601`  | [TVL USD](/wss-reference/evm/tvl/tvl-usd)                                    |
| `0701`  | [Arb paths](/wss-reference/evm/arbitrage/arb-paths)                          |
| `0702`  | [Arb path status](/wss-reference/evm/arbitrage/arb-path-status)              |
| `0801`  | [Arb opportunities](/wss-reference/evm/arbitrage/arb-opportunities)          |
| `0411`  | [Yields](/wss-reference/evm/yields/yields)                                   |