Supply delta live tracer

core/blockchain.go

@@ -1171,6 +1171,10 @@ func (bc *BlockChain) Stop() {
 	if err := bc.triedb.Close(); err != nil {
 		log.Error("Failed to close trie database", "err", err)
 	}
+	// Call OnTerminate hook on Tracers if it is set.
+	if bc.vmConfig.Tracer != nil && bc.vmConfig.Tracer.OnTerminate != nil {
+		bc.vmConfig.Tracer.OnTerminate()
+	}
 	log.Info("Blockchain stopped")
 }
 

core/tracing/hooks.go

@@ -140,6 +140,9 @@ type (
 
 	// LogHook is called when a log is emitted.
 	LogHook = func(log *types.Log)
+
+	// TerminateHook is called when the tracer is terminated.
+	TerminateHook = func()
 )
 
 type Hooks struct {
@@ -163,12 +166,15 @@ type Hooks struct {
 	OnCodeChange    CodeChangeHook
 	OnStorageChange StorageChangeHook
 	OnLog           LogHook
+	OnTerminate     TerminateHook
 }
 
 // BalanceChangeReason is used to indicate the reason for a balance change, useful
 // for tracing and reporting.
 type BalanceChangeReason byte
 
+//go:generate stringer -type=BalanceChangeReason -output gen_balance_change_reason_stringer.go
+
 const (
 	BalanceChangeUnspecified BalanceChangeReason = 0