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nym21
30 lines
1.4 KiB
Rust
30 lines
1.4 KiB
Rust
use brk_error::{OptionData, Result};
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use brk_types::{Height, TimePeriod};
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use vecdb::ReadableVec;
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use crate::Query;
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impl Query {
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/// First block height inside `period` looking back from the tip;
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/// genesis (`Height(0)`) for `All`. Errors `Internal` if the chosen
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/// lookback vec is stamped short of the tip - separating the
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/// "all-time" case from a transient stamp-lag dropout that would
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/// otherwise silently widen a windowed query to the full chain.
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pub(super) fn start_height(&self, period: TimePeriod) -> Result<Height> {
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let lookback = &self.computer().blocks.lookback;
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let tip = self.height();
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Ok(match period {
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TimePeriod::Day => lookback._24h.collect_one(tip).data()?,
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TimePeriod::ThreeDays => lookback._3d.collect_one(tip).data()?,
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TimePeriod::Week => lookback._1w.collect_one(tip).data()?,
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TimePeriod::Month => lookback._1m.collect_one(tip).data()?,
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TimePeriod::ThreeMonths => lookback._3m.collect_one(tip).data()?,
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TimePeriod::SixMonths => lookback._6m.collect_one(tip).data()?,
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TimePeriod::Year => lookback._1y.collect_one(tip).data()?,
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TimePeriod::TwoYears => lookback._2y.collect_one(tip).data()?,
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TimePeriod::ThreeYears => lookback._3y.collect_one(tip).data()?,
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TimePeriod::All => Height::from(0_usize),
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})
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}
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}
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