# Chain Data & State

## Overview

Everything a node returns — blocks, receipts, logs, proofs — arrives as hex-encoded RPC objects.
Ox's chain-data modules ([`Block`](/api/Block), [`TransactionReceipt`](/api/TransactionReceipt),
[`Log`](/api/Log), [`Filter`](/api/Filter), [`AccountProof`](/api/AccountProof), and friends)
convert between that wire format and typed JavaScript objects with a consistent `fromRpc`/`toRpc`
pattern. Alongside them sit [`Ens`](/api/Ens) for name hashing, [`Bloom`](/api/Bloom) for log
pre-checks, and [`StateOverrides`](/api/StateOverrides) /
[`BlockOverrides`](/api/BlockOverrides) for simulation.

```ts twoslash
import { Block, RpcTransport } from 'ox'

const transport = RpcTransport.fromHttp('https://1.rpc.thirdweb.com')

const block = await transport
  .request({ method: 'eth_getBlockByNumber', params: ['latest', false] })
  .then(Block.fromRpc) // [!code hl]
// @log: { number: 19868020n, timestamp: 1662222222n, ... }
```

<Cards>
  <Card icon="lucide:filter" title="Query Logs, Filters & Bloom" description="Build log filters, convert results, and pre-check bloom membership." to="/guides/chain-data/logs-filters" />

  <Card icon="lucide:at-sign" title="Resolve ENS Names" description="Normalize names and compute namehashes, labelhashes, and coin types." to="/guides/chain-data/ens" />

  <Card icon="lucide:layers" title="Simulate with State Overrides" description="Override account state and block context for eth_call simulations." to="/guides/chain-data/overrides" />

  <Card icon="lucide:shield-check" title="Verify State & Account Proofs" description="Convert eth_getProof results and build binary state trees." to="/guides/chain-data/proofs" />

  <Card icon="lucide:box" title="Work with Blocks & Receipts" description="Convert RPC blocks, withdrawals, and receipts into typed objects." to="/guides/chain-data/blocks" />
</Cards>