Prevent below_height underflow.

KomodoPlatform · Apr 19, 2022 · d02549e · d02549e
1 parent 4ffb443
commit d02549e
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Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/rust-toolchain b/rust-toolchain
diff --git a/zcash_client_sqlite/src/lib.rs b/zcash_client_sqlite/src/lib.rs
@@ -448,7 +448,12 @@ impl<'a, P: consensus::Parameters> WalletWrite for DataConnStmtCache<'a, P> {
             }
 
             // Prune the stored witnesses (we only expect rollbacks of at most 100 blocks).
-            wallet::prune_witnesses(up, block.block_height - 100)?;
+            let below_height = if block.block_height < BlockHeight::from(100) {
+                BlockHeight::from(0)
+            } else {
+                block.block_height - 100
+            };
+            wallet::prune_witnesses(up, below_height)?;
 
             // Update now-expired transactions that didn't get mined.
             wallet::update_expired_notes(up, block.block_height)?;