---
title: "eth_getCode"
description: "Returns the deployed bytecode at an address on Base; use pending on Flashblocks to detect newly deployed contracts before block finalization."
source: https://basehub.org/api-reference/eth/eth_getcode/
---
import { Aside, Tabs, TabItem } from '@astrojs/starlight/components';

Returns the compiled bytecode at a given address. Returns `"0x"` for externally owned accounts (EOAs).

<Aside type="tip">
**Flashblocks:** call `https://mainnet-preconf.base.org` with `"pending"` to detect contract deployments before the block seals.
</Aside>

## Parameters

| Position | Name | Type | Description |
| --- | --- | --- | --- |
| 1 | `address` | string | The 20-byte address to query. Required. |
| 2 | `block` | string | Block number in hex, or `"latest"`, `"pending"`, `"safe"`, `"finalized"`, `"earliest"`. Required. |

## Returns

| Field | Type | Description |
| --- | --- | --- |
| `result` | string | The bytecode at the address as a hex string. `"0x"` if there is no code. |

## Example

### Request

<Tabs>
  <TabItem label="Standard (latest)">

```bash
curl https://mainnet.base.org \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "latest"],
    "id": 1
  }'
```

  </TabItem>
  <TabItem label="Flashblocks (pending, ~200ms)">

```bash
curl https://mainnet-preconf.base.org \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "pending"],
    "id": 1
  }'
```

  </TabItem>
</Tabs>

### Response

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x608060405234801561001057600080fd5b50..."
}
```