24 lines
553 B
Rust
24 lines
553 B
Rust
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//! Chain tip interfaces.
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use crate::block;
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/// An interface for querying the chain tip.
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///
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/// This trait helps avoid dependencies between:
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/// * zebra-chain and tokio
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/// * zebra-network and zebra-state
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pub trait ChainTip {
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/// Return the height of the best chain tip.
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fn best_tip_height(&self) -> Option<block::Height>;
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}
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/// A chain tip that is always empty.
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#[derive(Copy, Clone, Debug, PartialEq, Eq)]
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pub struct NoChainTip;
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impl ChainTip for NoChainTip {
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fn best_tip_height(&self) -> Option<block::Height> {
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None
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}
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}
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