alchemy_requestFeePayer

Requests fee and rent sponsorship for a Solana transaction and returns the fully-signed serializedTransaction (now containing the fee-payer signature).

We support rent sponsorship for createAccount and createAssociatedTokenAccount programs. If you need support for sponsoring rent in custom programs, please contact us at [email protected].

Path parameters

apiKeystringRequired

Request

This endpoint expects an object.

policyIdstring or list of stringsRequired

The Gas Manager Policy ID or list of Gas Manager Policy IDs.

serializedTransactionstringRequiredformat: "^[A-Za-z0-9+/]+={0,2}$"

The unsigned transaction produced by tx.serialize(). It may already contain a feePayer; the service will overwrite it with the sponsoring account and add the fee-payer signature.

Response

Object containing the fully-signed transaction ready for sendRawTransaction.

serializedTransactionstring

The transaction after the service sets the feePayer field and adds the fee-payer signature.

1	import requests
2
3	url = "https://solana-mainnet.g.alchemy.com/v2/:apiKey"
4
5	payload = { "0": {
6	"policyId": "69d524a7-e932-4214-8673-dcdcba31bb42",
7	"serializedTransaction": "AgICAQMEBQYHCAkKCwwNDg8BCg=="
8	} }
9	headers = {"Content-Type": "application/json"}
10
11	response = requests.post(url, json=payload, headers=headers)
12
13	print(response.json())

1	{
2	"jsonrpc": "2.0",
3	"id": "1",
4	"result": {
5	"serializedTransaction": "AQIDBAUGBwgJCgsMDQ4PEA=="
6	}
7	}