network/options - Cardano

Example code for the network/options JSON-RPC method. Complete guide on how to use network/options JSON-RPC in GetBlock Web3 documentation.

This endpoint returns the version information and the allowed network-specific types, such as operation types, statuses, and errors, for a network.

Parameters

The request body is a JSON object with the following fields.

Field	Type	Required	Description
network_identifier	object	Yes	The network to query
metadata	object	No	Optional metadata object

Request

cURL

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/network/options' \
--header 'Content-Type: application/json' \
--data-raw '{
    "network_identifier": {
        "blockchain": "cardano",
        "network": "mainnet"
    },
    "metadata": {}
}'

JavaScript

example.js

const response = await fetch(
    'https://go.getblock.io/<ACCESS-TOKEN>/network/options',
    {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({"network_identifier": {"blockchain": "cardano", "network": "mainnet"}, "metadata": {}})
    }
);
console.log(await response.json());

Python

example.py

import requests

response = requests.post(
    'https://go.getblock.io/<ACCESS-TOKEN>/network/options',
    headers={'Content-Type': 'application/json'},
    json={"network_identifier": {"blockchain": "cardano", "network": "mainnet"}, "metadata": {}}
)

print(response.json())

Response

{
    "version": {
        "rosetta_version": "1.4.10",
        "node_version": "8.9.0",
        "middleware_version": "1.2.0"
    },
    "allow": {
        "operation_statuses": [
            {
                "status": "success",
                "successful": true
            }
        ],
        "operation_types": [
            "input",
            "output",
            "stakeKeyRegistration",
            "stakeDelegation",
            "withdrawal"
        ],
        "errors": [
            {
                "code": 1,
                "message": "Invalid request",
                "retriable": false
            }
        ],
        "historical_balance_lookup": true
    }
}

Response Parameters

Field	Type	Description
version	object	Rosetta, node, and middleware versions
allow.operation_types	array	Operation types the network uses
allow.operation_statuses	array	Possible operation statuses
allow.errors	array	Errors the server can return
allow.historical_balance_lookup	boolean	Whether historical balances are supported

Use Cases

• Capability Discovery: Learn which operation types the network supports

• Version Checks: Confirm the node and Rosetta versions

• Error Handling: Read the full error catalog for the network

• Historical Support: Detect whether historical balance lookups are allowed

Error Handling

Error Code	Message	Description
1	Invalid request	The request body is malformed or missing required fields
4	Block not found	The requested block does not exist on this node
5	Internal error	The node failed to answer the request