mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Bastian Köcher
66 lines
2.6 KiB
Rust
66 lines
2.6 KiB
Rust
// Copyright 2017-2019 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate 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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// Substrate 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 Substrate. If not, see <http://www.gnu.org/licenses/>.
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//! Transaction validity interface.
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use rstd::prelude::*;
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use crate::codec::{Encode, Decode};
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/// Priority for a transaction. Additive. Higher is better.
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pub type TransactionPriority = u64;
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/// Minimum number of blocks a transaction will remain valid for.
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/// `TransactionLongevity::max_value()` means "forever".
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pub type TransactionLongevity = u64;
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/// Tag for a transaction. No two transactions with the same tag should be placed on-chain.
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pub type TransactionTag = Vec<u8>;
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/// Information on a transaction's validity and, if valid, on how it relates to other transactions.
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#[derive(Clone, PartialEq, Eq, Encode, Decode)]
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#[cfg_attr(feature = "std", derive(Debug))]
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pub enum TransactionValidity {
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/// Transaction is invalid. Details are described by the error code.
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Invalid(i8),
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/// Transaction is valid.
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Valid {
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/// Priority of the transaction.
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///
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/// Priority determines the ordering of two transactions that have all
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/// their dependencies (required tags) satisfied.
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priority: TransactionPriority,
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/// Transaction dependencies
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///
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/// A non-empty list signifies that some other transactions which provide
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/// given tags are required to be included before that one.
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requires: Vec<TransactionTag>,
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/// Provided tags
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///
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/// A list of tags this transaction provides. Successfuly importing the transaction
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/// will enable other transactions that depend on (require) those tags to be included as well.
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/// Provided and requried tags allow Substrate to build a dependency graph of transactions
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/// and import them in the right (linear) order.
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provides: Vec<TransactionTag>,
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/// Transaction longevity
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///
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/// Longevity describes minimum number of blocks the validity is correct.
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/// After this period transaction should be removed from the pool or revalidated.
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longevity: TransactionLongevity,
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},
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/// Transaction validity can't be determined.
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Unknown(i8),
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}
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