> For the complete documentation index, see [llms.txt](https://docs.getblock.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.getblock.io/api-reference/optimistic-bnb-smart-chain-opbnb/eth_getproof-opbnb.md).

# eth\_getProof - opBNB

This method returns the Merkle-Patricia proof for an account, along with optional storage keys. Use it to prove the account state to a light client or another chain.

## Parameters

| Parameter      | Type            | Required | Description                                                                            |
| -------------- | --------------- | -------- | -------------------------------------------------------------------------------------- |
| address        | string          | Yes      | 20-byte address of the account                                                         |
| storageKeys    | array of string | Yes      | Array of 32-byte storage slot keys to include in the proof (may be empty)              |
| blockParameter | string          | Yes      | Block number in hex, or `"latest"`, `"earliest"`, `"pending"`, `"safe"`, `"finalized"` |

## Request Example

{% tabs %}
{% tab title="cURL" %}

```bash
curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_getProof",
    "params": [
        "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
        [
            "0x0000000000000000000000000000000000000000000000000000000000000000"
        ],
        "latest"
    ],
    "id": "getblock.io"
}'
```

{% endtab %}

{% tab title="JavaScript (Axios)" %}

```javascript
import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "eth_getProof",
    "params": [
        "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
        [
            "0x0000000000000000000000000000000000000000000000000000000000000000"
        ],
        "latest"
    ],
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data, null, 2)))
    .catch(error => console.log(error));
```

{% endtab %}

{% tab title="Python (Requests)" %}

```python
import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "eth_getProof",
    "params": [
        "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
        [
            "0x0000000000000000000000000000000000000000000000000000000000000000"
        ],
        "latest"
    ],
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)
```

{% endtab %}

{% tab title="Rust (Reqwest)" %}

```rust
use reqwest::Client;
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let payload = json!({
        "jsonrpc": "2.0",
        "method": "eth_getProof",
        "params": [
                "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
                [
                        "0x0000000000000000000000000000000000000000000000000000000000000000"
                ],
                "latest"
        ],
        "id": "getblock.io"
});

    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&payload)
        .send()
        .await?;

    let result: serde_json::Value = response.json().await?;
    println!("{:#?}", result);

    Ok(())
}
```

{% endtab %}
{% endtabs %}

## Response Example

{% code overflow="wrap" %}

```json
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "address": "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
        "accountProof": [
            "0xf90211a0\u2026",
            "0xf8d180a0\u2026"
        ],
        "balance": "0x1bc16d674ec80000",
        "codeHash": "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
        "nonce": "0x42",
        "storageHash": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "storageProof": [
            {
                "key": "0x0000000000000000000000000000000000000000000000000000000000000000",
                "value": "0x539",
                "proof": [
                    "0xf8a180\u2026"
                ]
            }
        ]
    }
}
```

{% endcode %}

## Response Parameters

| Field               | Type   | Description                                    |
| ------------------- | ------ | ---------------------------------------------- |
| result.balance      | string | Account balance (hex)                          |
| result.nonce        | string | Account nonce (hex)                            |
| result.codeHash     | string | Keccak-256 hash of the account's code          |
| result.storageHash  | string | Root of the storage trie for this account      |
| result.accountProof | array  | Merkle proof for the account in the state trie |
| result.storageProof | array  | Merkle proofs for the requested storage keys   |

## Use Cases

* Light client verification of account state
* Cross-chain bridges that prove state on opBNB to other chains
* Generating zero-knowledge proofs of state

## Error Handling

| Status Code | Error Message     | Cause                                       |
| ----------- | ----------------- | ------------------------------------------- |
| 403         | Forbidden         | Missing or invalid `<ACCESS-TOKEN>`         |
| -32602      | Invalid params    | Request parameters are missing or malformed |
| -32601      | Method not found  | The method is not supported by this node    |
| 429         | Too Many Requests | Rate limit exceeded for your plan           |

## SDK Integration

{% tabs %}
{% tab title="Ethers.js" %}
{% code overflow="wrap" %}

```javascript
import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

// Most methods are exposed directly on the provider.
// For raw access, use provider.send(method, params).
const result = await provider.send('eth_getProof', ["0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2", ["0x0000000000000000000000000000000000000000000000000000000000000000"], "latest"]);
console.log(result);
```

{% endcode %}
{% endtab %}

{% tab title="Viem" %}
{% code overflow="wrap" %}

```javascript
import { createPublicClient, http } from 'viem';
import { opBNB } from 'viem/chains';

const client = createPublicClient({
    chain: opBNB,
    transport: http('https://go.getblock.io/<ACCESS-TOKEN>/')
});

const result = await client.request({ method: 'eth_getProof', params: ["0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2", ["0x0000000000000000000000000000000000000000000000000000000000000000"], "latest"] });
console.log(result);
```

{% endcode %}
{% endtab %}
{% endtabs %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.getblock.io/api-reference/optimistic-bnb-smart-chain-opbnb/eth_getproof-opbnb.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.