update some comments

consensus/state.go

@@ -1235,7 +1235,7 @@ func (cs *ConsensusState) finalizeCommit(height int) {
 		PanicQ(Fmt("Commit failed for application: %v", err))
 	}
 
-	// txs committed and removed from mempool, fire events
+	// txs committed, bad ones removed from mepool; fire events
 	eventCache.Flush()
 
 	// Save to blockStore.

types/tx.go

@@ -8,7 +8,8 @@ type Tx []byte
 
 // NOTE: this is the hash of the go-wire encoded Tx.
 // Tx has no types at this level, so just length-prefixed.
-// Maybe it should just be the hash of the bytes tho?
+// Alternatively, it may make sense to add types here and let
+// []byte be type 0x1 so we can have versioned txs if need be in the future.
 func (tx Tx) Hash() []byte {
 	return merkle.SimpleHashFromBinary(tx)
 }