# eth_getChainConfig

> For the complete documentation index, see [llms.txt](/docs/llms.txt).

POST https://avax-mainnet.g.alchemy.com/v2/{apiKey}

Returns the chain config of the blockchain.

Reference: https://www.alchemy.com/docs/chains/avalanche/avalanche-api-endpoints/eth-get-chain-config

## Result

**Chain config** (object): The chain config of the blockchain.

## Code Examples

### cURL

```bash
curl --request POST \
  --url https://avax-mainnet.g.alchemy.com/v2/docs-demo \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_getChainConfig"
}'
```

### JavaScript

```javascript
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({jsonrpc: '2.0', id: 1, method: 'eth_getChainConfig'})
};

fetch('https://avax-mainnet.g.alchemy.com/v2/docs-demo', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
```

### Python

```python
import requests

url = "https://avax-mainnet.g.alchemy.com/v2/docs-demo"

payload = {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_getChainConfig"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)
```

### Go

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://avax-mainnet.g.alchemy.com/v2/docs-demo"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"eth_getChainConfig\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}
```

### Java

```java
HttpResponse<String> response = Unirest.post("https://avax-mainnet.g.alchemy.com/v2/docs-demo")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"eth_getChainConfig\"\n}")
  .asString();
```

### C#

```csharp
using RestSharp;


var options = new RestClientOptions("https://avax-mainnet.g.alchemy.com/v2/docs-demo");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddJsonBody("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"eth_getChainConfig\"\n}", false);
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

```


## OpenRPC Method Specification

```yaml
name: eth_getChainConfig
description: Returns the chain config of the blockchain.
params: []
result:
  name: Chain config
  description: The chain config of the blockchain.
  schema:
    type: object
    properties:
      chainId:
        type: integer
        description: The chain ID of the blockchain
      feeConfig:
        type: object
        properties:
          gasLimit:
            type: integer
            description: The gas limit per block
          targetBlockRate:
            type: integer
            description: The target block rate
          minBlockGasCost:
            type: integer
            description: The minimum block gas cost
          maxBlockGasCost:
            type: integer
            description: The maximum block gas cost
      feeManagerConfig:
        type: object
        properties:
          adminAddresses:
            type: array
            items:
              type: string
              description: The admin addresses
          blockTimestamp:
            type: integer
            description: The block timestamp for the fee manager config
      upgrades:
        type: object
        properties:
          precompileUpgrades:
            type: array
            items:
              type: object
              properties:
                feeManagerConfig:
                  type: object
                  properties:
                    adminAddresses:
                      type: array
                      items:
                        type: string
                        description: The admin addresses
                    blockTimestamp:
                      type: integer
                      description: The block timestamp for the fee manager config
                    disable:
                      type: boolean
                      description: Whether to disable the upgrade
```