57 lines
1.8 KiB
Rust
57 lines
1.8 KiB
Rust
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
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// This file is part of OpenEthereum.
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// OpenEthereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// OpenEthereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
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//! Ethereum transaction
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use evm::Schedule;
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use types::transaction::{self, Action};
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/// Extends transaction with gas verification method.
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pub trait Transaction {
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/// Get the transaction cost in gas for this transaction.
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fn gas_required(&self, schedule: &Schedule) -> u64;
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}
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impl Transaction for transaction::Transaction {
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fn gas_required(&self, schedule: &Schedule) -> u64 {
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gas_required_for(
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match self.action {
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Action::Create => true,
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Action::Call(_) => false,
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},
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&self.data,
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schedule,
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)
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}
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}
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/// Get the transaction cost in gas for the given params.
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fn gas_required_for(is_create: bool, data: &[u8], schedule: &Schedule) -> u64 {
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data.iter().fold(
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(if is_create {
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schedule.tx_create_gas
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} else {
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schedule.tx_gas
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}) as u64,
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|g, b| {
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g + (match *b {
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0 => schedule.tx_data_zero_gas,
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_ => schedule.tx_data_non_zero_gas,
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}) as u64
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},
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)
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}
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