server: snapshot

crates/brk_query/src/impl/mining/block_rewards.rs

@@ -0,0 +1,35 @@
+use brk_error::Result;
+use brk_types::{BlockRewardsEntry, TimePeriod};
+use vecdb::{IterableVec, VecIndex};
+
+use super::dateindex_iter::DateIndexIter;
+use crate::Query;
+
+impl Query {
+    pub fn block_rewards(&self, time_period: TimePeriod) -> Result<Vec<BlockRewardsEntry>> {
+        let computer = self.computer();
+        let current_height = self.height();
+        let start = current_height
+            .to_usize()
+            .saturating_sub(time_period.block_count());
+
+        let iter = DateIndexIter::new(computer, start, current_height.to_usize());
+
+        // coinbase = subsidy + fees
+        let mut rewards = computer
+            .chain
+            .indexes_to_coinbase
+            .sats
+            .dateindex
+            .unwrap_average()
+            .iter();
+
+        Ok(iter.collect(|di, ts, h| {
+            rewards.get(di).map(|reward| BlockRewardsEntry {
+                avg_height: h.into(),
+                timestamp: *ts,
+                avg_rewards: *reward,
+            })
+        }))
+    }
+}