fuel_tx

Trait Chargeable

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pub trait Chargeable:
    Inputs
    + Witnesses
    + Policies {
    // Required methods
    fn metered_bytes_size(&self) -> usize;
    fn gas_used_by_metadata(&self, gas_costs: &GasCosts) -> Word;

    // Provided methods
    fn min_gas(&self, gas_costs: &GasCosts, fee: &FeeParameters) -> Word { ... }
    fn max_gas(&self, gas_costs: &GasCosts, fee: &FeeParameters) -> Word { ... }
    fn min_fee(
        &self,
        gas_costs: &GasCosts,
        fee: &FeeParameters,
        gas_price: Word,
    ) -> u128 { ... }
    fn max_fee(
        &self,
        gas_costs: &GasCosts,
        fee: &FeeParameters,
        gas_price: Word,
    ) -> u128 { ... }
    fn refund_fee(
        &self,
        gas_costs: &GasCosts,
        fee: &FeeParameters,
        used_gas: Word,
        gas_price: Word,
    ) -> Option<Word> { ... }
    fn gas_used_by_inputs(&self, gas_costs: &GasCosts) -> Word { ... }
}
Expand description

Means that the blockchain charges fee for the transaction.

Required Methods§

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fn metered_bytes_size(&self) -> usize

Used for accounting purposes when charging byte based fees.

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fn gas_used_by_metadata(&self, gas_costs: &GasCosts) -> Word

Used for accounting purposes when charging for metadata creation.

Provided Methods§

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fn min_gas(&self, gas_costs: &GasCosts, fee: &FeeParameters) -> Word

Returns the minimum gas required to start transaction execution.

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fn max_gas(&self, gas_costs: &GasCosts, fee: &FeeParameters) -> Word

Returns the maximum possible gas after the end of transaction execution.

The function guarantees that the value is not less than Self::min_gas.

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fn min_fee( &self, gas_costs: &GasCosts, fee: &FeeParameters, gas_price: Word, ) -> u128

Returns the minimum fee required to start transaction execution.

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fn max_fee( &self, gas_costs: &GasCosts, fee: &FeeParameters, gas_price: Word, ) -> u128

Returns the maximum possible fee after the end of transaction execution.

The function guarantees that the value is not less than Self::min_fee.

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fn refund_fee( &self, gas_costs: &GasCosts, fee: &FeeParameters, used_gas: Word, gas_price: Word, ) -> Option<Word>

Returns the fee amount that can be refunded back based on the used_gas and current state of the transaction.

Return None if overflow occurs.

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fn gas_used_by_inputs(&self, gas_costs: &GasCosts) -> Word

Returns the gas used by the inputs.

Implementors§