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use serde::{Deserialize, Serialize};

/// Specifies the topic which to be added as active subscription.
#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Hash)]
#[serde(rename_all = "snake_case")]
pub enum Topic {
    /// Subscribe new tip headers.
    NewTipHeader,
    /// Subscribe new tip blocks.
    NewTipBlock,
    /// Subscribe new transactions which are submitted to the pool.
    NewTransaction,
    /// Subscribe in-pool transactions which proposed on chain.
    ProposedTransaction,
    /// Subscribe transactions which are abandoned by tx-pool.
    RejectedTransaction,
}