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].

Requests fee and rent sponsorship for a Solana transaction and returns the **fully-signed** `serializedTransaction` (now containing the fee-payer signature). <Note> 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]](mailto:[email protected]). </Note>

Path Parameters

apiKeystringRequiredDefaults to docs-demo

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://eth-mainnet.g.alchemy.com/v2/:apiKey"
4
5	payload = [
6	{
7	"policyId": "69d524a7-e932-4214-8673-dcdcba31bb42",
8	"serializedTransaction": "AgICAQMEBQYHCAkKCwwNDg8BCg=="
9	}
10	]
11	headers = {"Content-Type": "application/json"}
12
13	response = requests.post(url, json=payload, headers=headers)
14
15	print(response.json())

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