starknet_estimateFee | Alchemy Docs

Estimates the resources required by a given sequence of transactions when applied on a given state. If one of the transactions reverts or fails due to any reason (e.g., validation failure or an internal error), a TRANSACTION_EXECUTION_ERROR is returned. For v0-2 transactions the estimate is given in wei, and for v3 transactions it is given in fri.

Path parameters

apiKeystringRequiredDefaults to docs-demo

Request

This endpoint expects an object.

requestlist of objectsRequired

The transaction to estimate

simulation_flagslist of enumsRequired

Describes what parts of the transaction should be executed

Allowed values:

block_idobject or enumRequired

The hash of the requested block, or number (height) of the requested block, or a block tag, for the block referencing the state or call the transaction on.

Response

The fee estimations

gas_consumedstringformat: "^0x(0|[a-fA-F1-9]{1}[a-fA-F0-9]{0,62})$"

The Ethereum gas consumption of the transaction

gas_pricestringformat: "^0x(0|[a-fA-F1-9]{1}[a-fA-F0-9]{0,62})$"

The gas price (in wei or fri, depending on the tx version) that was used in the cost estimation

data_gas_consumedstringformat: "^0x(0|[a-fA-F1-9]{1}[a-fA-F0-9]{0,62})$"

The Ethereum data gas consumption of the transaction

data_gas_pricestringformat: "^0x(0|[a-fA-F1-9]{1}[a-fA-F0-9]{0,62})$"

The data gas price (in wei or fri, depending on the tx version) that was used in the cost estimation

overall_feestringformat: "^0x(0|[a-fA-F1-9]{1}[a-fA-F0-9]{0,62})$"

The estimated fee for the transaction (in wei or fri, depending on the tx version), equals to gas_consumed * gas_price + data_gas_consumed * data_gas_price

unitenum

Units in which the fee is given

Allowed values:

1	import requests
2
3	url = "https://starknet-mainnet.g.alchemy.com/v2/docs-demo"
4
5	headers = {"Content-Type": "application/json"}
6
7	response = requests.post(url, headers=headers)
8
9	print(response.json())

1	{
2	"id": 1,
3	"jsonrpc": "2.0",
4	"result": [
5	{
6	"gas_consumed": "foo",
7	"gas_price": "foo",
8	"data_gas_consumed": "foo",
9	"data_gas_price": "foo",
10	"overall_fee": "foo",
11	"unit": "WEI"
12	}
13	]
14	}