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#14 in #event

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101,942 downloads per month
Used in 9 crates (via polkadot-sdk)

GPL-3.0-only

2MB
35K SLoC

Release

Polkadot SDK stable2409


lib.rs:

Skip Feeless Payment Pallet

This pallet allows runtimes that include it to skip payment of transaction fees for dispatchables marked by #[pallet::feeless_if].

Overview

It does this by wrapping an existing SignedExtension implementation (e.g. pallet-transaction-payment) and checking if the dispatchable is feeless before applying the wrapped extension. If the dispatchable is indeed feeless, the extension is skipped and a custom event is emitted instead. Otherwise, the extension is applied as usual.

Integration

This pallet wraps an existing transaction payment pallet. This means you should both pallets in your construct_runtime macro and include this pallet's SignedExtension (SkipCheckIfFeeless) that would accept the existing one as an argument.

Dependencies

~18–31MB
~520K SLoC