Subscriptions overview#

The Subscriptions Delegation Program lets users authorize future SPL Token or Token-2022 transfers with explicit limits. In Dart, use solana_kit_subscriptions for generated PDAs, account decoders, and instruction builders.

Each (user, token mint) pair gets a program-controlled Subscription Authority. The user's token account approves that authority once. The program then checks every requested pull against an active authorization record.

Model	Use
Fixed delegation	Let a delegatee spend up to one total allowance, optionally with an expiry.
Recurring delegation	Let a delegatee spend up to a limit that resets each period.
Subscription plan	Let a merchant publish terms that subscribers accept and approved collectors charge.

import 'package:solana_kit/solana_kit.dart';
import 'package:solana_kit_subscriptions/solana_kit_subscriptions.dart';

Future<void> main() async {
  const user = Address('11111111111111111111111111111112');
  const tokenMint = Address('So11111111111111111111111111111111111111112');

  final (authority, bump) = await findSubscriptionAuthorityPda(
    programAddress: subscriptionsProgramAddress,
    seeds: SubscriptionAuthoritySeeds(user: user, tokenMint: tokenMint),
  );

  print('authority=$authority bump=$bump');
}

Amounts are token base units. For a 6-decimal token, 1_000_000 means 1 token.