Starknet Estimate Fee

POST

https://starknet.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Estimates the fee for one or more transactions without submitting them.

Body

application/json

jsonrpcstring2.0required

idinteger | stringrequired

methodstringstarknet_estimateFeerequired

paramsArray<Array<object>>required

Response

200OK

Successful JSON-RPC response

400Bad Request

Invalid JSON-RPC request or parameters

401Unauthorized

Missing or invalid API key

429Too Many Requests

Rate limit exceeded

500Internal Server Error

Node or upstream server error

Starknet Estimate Fee

curl -X POST 'https://starknet.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "starknet_estimateFee",
    "params": [
      [
        {
          "type": "INVOKE",
          "version": "0x3",
          "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
          "calldata": [
            "0x1"
          ],
          "signature": [
            "0x1",
            "0x2"
          ],
          "nonce": "0x1",
          "resource_bounds": {
            "l1_gas": {
              "max_amount": "0x0",
              "max_price_per_unit": "0x0"
            },
            "l2_gas": {
              "max_amount": "0x0",
              "max_price_per_unit": "0x0"
            },
            "l1_data_gas": {
              "max_amount": "0x0",
              "max_price_per_unit": "0x0"
            }
          },
          "tip": "0x0",
          "paymaster_data": [],
          "account_deployment_data": [],
          "nonce_data_availability_mode": "L1",
          "fee_data_availability_mode": "L1"
        }
      ],
      [
        "SKIP_VALIDATE"
      ],
      {
        "block_tag": "latest"
      }
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://starknet.nownodes.io/");
const result = await provider.send("starknet_estimateFee", [
  [
    {
      "type": "INVOKE",
      "version": "0x3",
      "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
      "calldata": [
        "0x1"
      ],
      "signature": [
        "0x1",
        "0x2"
      ],
      "nonce": "0x1",
      "resource_bounds": {
        "l1_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        },
        "l2_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        },
        "l1_data_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        }
      },
      "tip": "0x0",
      "paymaster_data": [],
      "account_deployment_data": [],
      "nonce_data_availability_mode": "L1",
      "fee_data_availability_mode": "L1"
    }
  ],
  [
    "SKIP_VALIDATE"
  ],
  {
    "block_tag": "latest"
  }
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://starknet.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "starknet_estimateFee",
  "params": [
    [
      {
        "type": "INVOKE",
        "version": "0x3",
        "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
        "calldata": [
          "0x1"
        ],
        "signature": [
          "0x1",
          "0x2"
        ],
        "nonce": "0x1",
        "resource_bounds": {
          "l1_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          },
          "l2_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          },
          "l1_data_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          }
        },
        "tip": "0x0",
        "paymaster_data": [],
        "account_deployment_data": [],
        "nonce_data_availability_mode": "L1",
        "fee_data_availability_mode": "L1"
      }
    ],
    [
      "SKIP_VALIDATE"
    ],
    {
      "block_tag": "latest"
    }
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://starknet.nownodes.io/"))
response = w3.provider.make_request("starknet_estimateFee", [
  [
    {
      "type": "INVOKE",
      "version": "0x3",
      "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
      "calldata": [
        "0x1"
      ],
      "signature": [
        "0x1",
        "0x2"
      ],
      "nonce": "0x1",
      "resource_bounds": {
        "l1_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        },
        "l2_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        },
        "l1_data_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        }
      },
      "tip": "0x0",
      "paymaster_data": [],
      "account_deployment_data": [],
      "nonce_data_availability_mode": "L1",
      "fee_data_availability_mode": "L1"
    }
  ],
  [
    "SKIP_VALIDATE"
  ],
  {
    "block_tag": "latest"
  }
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://starknet.nownodes.io/"),
});

const result = await client.request({
  method: "starknet_estimateFee",
  params: [
  [
    {
      "type": "INVOKE",
      "version": "0x3",
      "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
      "calldata": [
        "0x1"
      ],
      "signature": [
        "0x1",
        "0x2"
      ],
      "nonce": "0x1",
      "resource_bounds": {
        "l1_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        },
        "l2_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        },
        "l1_data_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        }
      },
      "tip": "0x0",
      "paymaster_data": [],
      "account_deployment_data": [],
      "nonce_data_availability_mode": "L1",
      "fee_data_availability_mode": "L1"
    }
  ],
  [
    "SKIP_VALIDATE"
  ],
  {
    "block_tag": "latest"
  }
],
});

console.log(result);

const endpoint = "https://starknet.nownodes.io/";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "starknet_estimateFee", params: [
  [
    {
      "type": "INVOKE",
      "version": "0x3",
      "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
      "calldata": [
        "0x1"
      ],
      "signature": [
        "0x1",
        "0x2"
      ],
      "nonce": "0x1",
      "resource_bounds": {
        "l1_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        },
        "l2_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        },
        "l1_data_gas": {
          "max_amount": "0x0",
          "max_price_per_unit": "0x0"
        }
      },
      "tip": "0x0",
      "paymaster_data": [],
      "account_deployment_data": [],
      "nonce_data_availability_mode": "L1",
      "fee_data_availability_mode": "L1"
    }
  ],
  [
    "SKIP_VALIDATE"
  ],
  {
    "block_tag": "latest"
  }
], id: 1 });
console.log(result);

const response = await fetch('https://starknet.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": 1,
      "method": "starknet_estimateFee",
      "params": [
        [
          {
            "type": "INVOKE",
            "version": "0x3",
            "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
            "calldata": [
              "0x1"
            ],
            "signature": [
              "0x1",
              "0x2"
            ],
            "nonce": "0x1",
            "resource_bounds": {
              "l1_gas": {
                "max_amount": "0x0",
                "max_price_per_unit": "0x0"
              },
              "l2_gas": {
                "max_amount": "0x0",
                "max_price_per_unit": "0x0"
              },
              "l1_data_gas": {
                "max_amount": "0x0",
                "max_price_per_unit": "0x0"
              }
            },
            "tip": "0x0",
            "paymaster_data": [],
            "account_deployment_data": [],
            "nonce_data_availability_mode": "L1",
            "fee_data_availability_mode": "L1"
          }
        ],
        [
          "SKIP_VALIDATE"
        ],
        {
          "block_tag": "latest"
        }
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "starknet_estimateFee",
  "params": [
    [
      {
        "type": "INVOKE",
        "version": "0x3",
        "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
        "calldata": [
          "0x1"
        ],
        "signature": [
          "0x1",
          "0x2"
        ],
        "nonce": "0x1",
        "resource_bounds": {
          "l1_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          },
          "l2_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          },
          "l1_data_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          }
        },
        "tip": "0x0",
        "paymaster_data": [],
        "account_deployment_data": [],
        "nonce_data_availability_mode": "L1",
        "fee_data_availability_mode": "L1"
      }
    ],
    [
      "SKIP_VALIDATE"
    ],
    {
      "block_tag": "latest"
    }
  ]
}

response = requests.post('https://starknet.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://starknet.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "starknet_estimateFee",
    "params": [
      [
        {
          "type": "INVOKE",
          "version": "0x3",
          "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
          "calldata": [
            "0x1"
          ],
          "signature": [
            "0x1",
            "0x2"
          ],
          "nonce": "0x1",
          "resource_bounds": {
            "l1_gas": {
              "max_amount": "0x0",
              "max_price_per_unit": "0x0"
            },
            "l2_gas": {
              "max_amount": "0x0",
              "max_price_per_unit": "0x0"
            },
            "l1_data_gas": {
              "max_amount": "0x0",
              "max_price_per_unit": "0x0"
            }
          },
          "tip": "0x0",
          "paymaster_data": [],
          "account_deployment_data": [],
          "nonce_data_availability_mode": "L1",
          "fee_data_availability_mode": "L1"
        }
      ],
      [
        "SKIP_VALIDATE"
      ],
      {
        "block_tag": "latest"
      }
    ]
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "starknet_estimateFee",
  "params": [
    [
      {
        "type": "INVOKE",
        "version": "0x3",
        "sender_address": "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733",
        "calldata": [
          "0x1"
        ],
        "signature": [
          "0x1",
          "0x2"
        ],
        "nonce": "0x1",
        "resource_bounds": {
          "l1_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          },
          "l2_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          },
          "l1_data_gas": {
            "max_amount": "0x0",
            "max_price_per_unit": "0x0"
          }
        },
        "tip": "0x0",
        "paymaster_data": [],
        "account_deployment_data": [],
        "nonce_data_availability_mode": "L1",
        "fee_data_availability_mode": "L1"
      }
    ],
    [
      "SKIP_VALIDATE"
    ],
    {
      "block_tag": "latest"
    }
  ]
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": [
    {
      "l1_gas_consumed": "0x0",
      "l1_gas_price": "0x21f956748",
      "l2_gas_consumed": "0x16e360",
      "l2_gas_price": "0x1dcd65000",
      "l1_data_gas_consumed": "0x5dc",
      "l1_data_gas_price": "0x5f6eb0b3f",
      "overall_fee": "0x123456",
      "unit": "FRI"
    }
  ]
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}

Documentation

How to migrate to NOWNodes

Starknet Estimate Fee

Authorizations

Body

Response