Skip processing needless block in the bundle validator

We only keep track of the state of the last K blocks, if there are more than
K blocks left to process we can skip some blocks as their result will simply
be dumpped after processing, this also help to prevent the bundle validator
from stuck on some pruned blocks because these block will be skip as the chain
grows.

Signed-off-by: linning <linningde25@gmail.com>

crates/subspace-transaction-pool/src/bundle_validator.rs

@@ -140,8 +140,12 @@ where
             }
         }
 
-        // Add bundles from the new block of the best fork
-        for enacted_block in enacted {
+        // Add bundles from the new block of the best fork, only need to process at most the last K
+        // blocks as the result of other blocks will be dumpped immediately, this also help to prevent
+        // the bundle validator from stuck on some pruned blocks because these blocks will be skip as
+        // the chain grows.
+        let needless_block = enacted.len().saturating_sub(self.confirm_depth_k);
+        for enacted_block in enacted.iter().skip(needless_block) {
             let bundles = self.successfully_submitted_bundles_at(enacted_block.hash)?;
             bundle_stored_in_last_k.push_front(BlockBundle::new(
                 enacted_block.hash,