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refactor: move all deal with fees logic into common crate
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| use frame_support::__private::Get; | ||
| use frame_support::pallet_prelude::TypedGet; | ||
| use frame_support::traits::fungible::Credit; | ||
| use frame_support::traits::tokens::imbalance::ResolveTo; | ||
| use frame_support::traits::Imbalance; | ||
| use frame_support::traits::OnUnbalanced; | ||
| use pallet_treasury::TreasuryAccountId; | ||
| use sp_runtime::Perbill; | ||
|
|
||
| /// Deal with substrate based fees and tip. This should be used with pallet_transaction_payment. | ||
| pub struct DealWithSubstrateFeesAndTip<R, FeesTreasuryProportion>( | ||
| sp_std::marker::PhantomData<(R, FeesTreasuryProportion)>, | ||
| ); | ||
| impl<R, FeesTreasuryProportion> DealWithSubstrateFeesAndTip<R, FeesTreasuryProportion> | ||
| where | ||
| R: pallet_balances::Config + pallet_treasury::Config + pallet_author_inherent::Config, | ||
| pallet_author_inherent::Pallet<R>: Get<R::AccountId>, | ||
| FeesTreasuryProportion: Get<Perbill>, | ||
| { | ||
| fn deal_with_fees(amount: Credit<R::AccountId, pallet_balances::Pallet<R>>) { | ||
| // Balances pallet automatically burns dropped Credits by decreasing | ||
| // total_supply accordingly | ||
| let treasury_proportion = FeesTreasuryProportion::get(); | ||
| let treasury_part = treasury_proportion.deconstruct(); | ||
| let burn_part = Perbill::one().deconstruct() - treasury_part; | ||
| let (_, to_treasury) = amount.ration(burn_part, treasury_part); | ||
| ResolveTo::<TreasuryAccountId<R>, pallet_balances::Pallet<R>>::on_unbalanced(to_treasury); | ||
| } | ||
|
|
||
| fn deal_with_tip(amount: Credit<R::AccountId, pallet_balances::Pallet<R>>) { | ||
| ResolveTo::<BlockAuthorAccountId<R>, pallet_balances::Pallet<R>>::on_unbalanced(amount); | ||
| } | ||
| } | ||
|
|
||
| impl<R, FeesTreasuryProportion> OnUnbalanced<Credit<R::AccountId, pallet_balances::Pallet<R>>> | ||
| for DealWithSubstrateFeesAndTip<R, FeesTreasuryProportion> | ||
| where | ||
| R: pallet_balances::Config + pallet_treasury::Config + pallet_author_inherent::Config, | ||
| pallet_author_inherent::Pallet<R>: Get<R::AccountId>, | ||
| FeesTreasuryProportion: Get<Perbill>, | ||
| { | ||
| fn on_unbalanceds( | ||
| mut fees_then_tips: impl Iterator<Item = Credit<R::AccountId, pallet_balances::Pallet<R>>>, | ||
| ) { | ||
| if let Some(fees) = fees_then_tips.next() { | ||
| Self::deal_with_fees(fees); | ||
| if let Some(tip) = fees_then_tips.next() { | ||
| Self::deal_with_tip(tip); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Deal with ethereum based fees. To handle tips/priority fees, use DealWithEthereumPriorityFees. | ||
| pub struct DealWithEthereumBaseFees<R, FeesTreasuryProportion>( | ||
| sp_std::marker::PhantomData<(R, FeesTreasuryProportion)>, | ||
| ); | ||
| impl<R, FeesTreasuryProportion> OnUnbalanced<Credit<R::AccountId, pallet_balances::Pallet<R>>> | ||
| for DealWithEthereumBaseFees<R, FeesTreasuryProportion> | ||
| where | ||
| R: pallet_balances::Config + pallet_treasury::Config, | ||
| FeesTreasuryProportion: Get<Perbill>, | ||
| { | ||
| fn on_nonzero_unbalanced(amount: Credit<R::AccountId, pallet_balances::Pallet<R>>) { | ||
| // Balances pallet automatically burns dropped Credits by decreasing | ||
| // total_supply accordingly | ||
| let treasury_proportion = FeesTreasuryProportion::get(); | ||
| let treasury_part = treasury_proportion.deconstruct(); | ||
| let burn_part = Perbill::one().deconstruct() - treasury_part; | ||
| let (_, to_treasury) = amount.ration(burn_part, treasury_part); | ||
| ResolveTo::<TreasuryAccountId<R>, pallet_balances::Pallet<R>>::on_unbalanced(to_treasury); | ||
| } | ||
| } | ||
|
|
||
| pub struct BlockAuthorAccountId<R>(sp_std::marker::PhantomData<R>); | ||
| impl<R> TypedGet for BlockAuthorAccountId<R> | ||
| where | ||
| R: frame_system::Config + pallet_author_inherent::Config, | ||
| pallet_author_inherent::Pallet<R>: Get<R::AccountId>, | ||
| { | ||
| type Type = R::AccountId; | ||
| fn get() -> Self::Type { | ||
| <pallet_author_inherent::Pallet<R> as Get<R::AccountId>>::get() | ||
| } | ||
| } | ||
|
|
||
| /// Deal with ethereum based priority fees/tips. See DealWithEthereumBaseFees for base fees. | ||
| pub struct DealWithEthereumPriorityFees<R>(sp_std::marker::PhantomData<R>); | ||
| impl<R> OnUnbalanced<Credit<R::AccountId, pallet_balances::Pallet<R>>> | ||
| for DealWithEthereumPriorityFees<R> | ||
| where | ||
| R: pallet_balances::Config + pallet_author_inherent::Config, | ||
| pallet_author_inherent::Pallet<R>: Get<R::AccountId>, | ||
| { | ||
| fn on_nonzero_unbalanced(amount: Credit<R::AccountId, pallet_balances::Pallet<R>>) { | ||
| ResolveTo::<BlockAuthorAccountId<R>, pallet_balances::Pallet<R>>::on_unbalanced(amount); | ||
| } | ||
| } |
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