Trait darwinia_evm::OnChargeEVMTransaction

pub trait OnChargeEVMTransaction<T: Config> {
    type LiquidityInfo: Default;

    fn withdraw_fee(
        who: &H160, 
        fee: U256
    ) -> Result<Self::LiquidityInfo, Error<T>>;
    fn correct_and_deposit_fee(
        who: &H160, 
        corrected_fee: U256, 
        already_withdrawn: Self::LiquidityInfo
    );
    fn pay_priority_fee(tip: U256);
}

Handle withdrawing, refunding and depositing of transaction fees. Similar to OnChargeTransaction of pallet_transaction_payment

Required Associated Types

type LiquidityInfo: Default

Required Methods

fn withdraw_fee(who: &H160, fee: U256) -> Result<Self::LiquidityInfo, Error<T>>

Before the transaction is executed the payment of the transaction fees need to be secured.

fn correct_and_deposit_fee(
    who: &H160,
    corrected_fee: U256,
    already_withdrawn: Self::LiquidityInfo
)

After the transaction was executed the actual fee can be calculated. This function should refund any overpaid fees and optionally deposit the corrected amount.

fn pay_priority_fee(tip: U256)

Introduced in EIP1559 to handle the priority tip payment to the block Author.

Implementors

impl<T, F> OnChargeEVMTransaction<T> for EVMCurrencyAdapter<F> where
    T: Config,
    F: FindAuthor<T::AccountId>, 

type LiquidityInfo = U256