# getGenesisHash – Solana

{% hint style="success" %}
The getGenesisHash RPC Solana method returns the base-58 encoded hash of the genesis block, which is the first block of the blockchain.
{% endhint %}

The getGenesisHash method returns the genesis hash of the Solana blockchain. This unique identifier helps verify network consistency, distinguish between different Solana clusters (such as Mainnet, Testnet, and Devnet), and ensure clients are connected to the correct network.

### Supported Networks

This method is accessible through Solana API endpoints:

* Mainnet

### Parameters

{% hint style="info" %}
This method does not require any parameters.
{% endhint %}

### Request Example

#### API Endpoints

```json
https://go.getblock.io/<ACCESS-TOKEN>/
```

#### cURL Example

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

```json
curl --location "https://go.getblock.io/<ACCESS-TOKEN>/" -XPOST \
--header "Content-Type: application/json" \
--data '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getGenesisHash"
}'
```

{% endtab %}
{% endtabs %}

### Response

A successful getGenesisHash example response returns the base-58 encoded hash of the genesis block.

#### Example Response

```json
{
  "jsonrpc": "2.0",
  "result": "GH7ome3EiwEr7tu9JuTh2dpYWBJK3z69Xm1ZE3MEE6JC",
  "id": 1
}
```

### Error Handling

Common getGenesisHash error scenarios:

* Network connectivity issues: The request fails due to Solana API unavailability.
* Node synchronization issues: If the node is not fully synced, it may not return a valid genesis hash.

#### Example Error Response

```json
{
  "jsonrpc": "2.0",
  "error": {
    "code": -32000,
    "message": "Genesis hash unavailable"
  },
  "id": 1
}
```

### Use Cases

The Solana getGenesisHash method is essential for:

* Blockchain explorers: Identifying the network by its unique genesis hash.
* Web3 applications: Ensuring connection to the correct chain.
* Validators and nodes: Verifying blockchain integrity before syncing.
* Analytics platforms: Tracking blockchain instances and differentiating between environments.

### Code Example – Web3 getGenesisHash Integration

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

```javascript
const axios = require('axios');

const url = "https://go.getblock.io/<ACCESS-TOKEN>/"; 
const headers = { "Content-Type": "application/json" };

const payload = {
  jsonrpc: "2.0",
  id: 1,
  method: "getGenesisHash"
};

const fetchGenesisHash = async () => {
  try {
    const response = await axios.post(url, payload, { headers });

    if (response.status === 200 && response.data.result) {
      console.log("Genesis Hash:", response.data.result);
    } else {
      console.error("Unexpected response:", response.data);
    }
  } catch (error) {
    console.error("getGenesisHash error:", error.response?.data || error.message);
  }
};

fetchGenesisHash();

```

{% endtab %}
{% endtabs %}

### Integration with Web3

Integrate the getGenesisHash API with Solana’s Core API to retrieve blockchain identity information dynamically. By leveraging JSON-RPC parameters and endpoints, developers can ensure correct network selection and chain validation, improving blockchain security and reliability.


---

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

```
GET https://docs.getblock.io/api-reference/solana-sol/getgenesishash-solana.md?ask=<question>
```

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