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// Copyright (c) The Diem Core Contributors
// SPDX-License-Identifier: Apache-2.0

// Copyright 2021 Conflux Foundation. All rights reserved.
// Conflux is free software and distributed under GNU General Public License.
// See http://www.gnu.org/licenses/

use diem_crypto::HashValue;
use diem_types::{
    account_address::AccountAddress,
    transaction::{GovernanceRole, SignedTransaction},
};
use serde::{Deserialize, Serialize};
use std::time::Duration;

#[derive(Clone)]
pub struct MempoolTransaction {
    pub txn: SignedTransaction,
    // System expiration time of the transaction. It should be removed from
    // mempool by that time.
    pub expiration_time: Duration,
    pub ranking_score: u64,
    pub timeline_state: TimelineState,
    pub governance_role: GovernanceRole,
}

impl MempoolTransaction {
    pub(crate) fn new(
        txn: SignedTransaction, expiration_time: Duration, ranking_score: u64,
        timeline_state: TimelineState, governance_role: GovernanceRole,
    ) -> Self {
        Self {
            txn,
            ranking_score,
            expiration_time,
            timeline_state,
            governance_role,
        }
    }

    pub(crate) fn get_hash(&self) -> HashValue { self.txn.hash() }

    pub(crate) fn get_sender(&self) -> AccountAddress { self.txn.sender() }
}

#[derive(Clone, Copy, PartialEq, Eq, Debug, Deserialize, Hash, Serialize)]
pub enum TimelineState {
    // The transaction is ready for broadcast.
    // Associated integer represents it's position in the log of such
    // transactions.
    Ready(u64),
    // Transaction is not yet ready for broadcast, but it might change in a
    // future.
    NotReady,
    // Transaction will never be qualified for broadcasting.
    // Currently we don't broadcast transactions originated on other peers.
    NonQualified,
}