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)
 	}
+	// Allow tracers to clean-up and release resources.
+	if bc.vmConfig.Tracer != nil && bc.vmConfig.Tracer.OnBlockchainTerminate != nil {
+		bc.vmConfig.Tracer.OnBlockchainTerminate()
+	}
 	log.Info("Blockchain stopped")
 }
 

core/tracing/hooks.go

@@ -107,6 +107,9 @@ type (
 	// BlockchainInitHook is called when the blockchain is initialized.
 	BlockchainInitHook = func(chainConfig *params.ChainConfig)
 
+	// BlockchainTerminateHook is called when the tracer is terminated.
+	BlockchainTerminateHook = func()
+
 	// BlockStartHook is called before executing `block`.
 	// `td` is the total difficulty prior to `block`.
 	BlockStartHook = func(event BlockEvent)
@@ -152,11 +155,12 @@ type Hooks struct {
 	OnFault     FaultHook
 	OnGasChange GasChangeHook
 	// Chain events
-	OnBlockchainInit BlockchainInitHook
-	OnBlockStart     BlockStartHook
-	OnBlockEnd       BlockEndHook
-	OnSkippedBlock   SkippedBlockHook
-	OnGenesisBlock   GenesisBlockHook
+	OnBlockchainInit      BlockchainInitHook
+	OnBlockchainTerminate BlockchainTerminateHook
+	OnBlockStart          BlockStartHook
+	OnBlockEnd            BlockEndHook
+	OnSkippedBlock        SkippedBlockHook
+	OnGenesisBlock        GenesisBlockHook
 	// State events
 	OnBalanceChange BalanceChangeHook
 	OnNonceChange   NonceChangeHook
@@ -169,6 +173,8 @@ type Hooks struct {
 // for tracing and reporting.
 type BalanceChangeReason byte
 
+//go:generate stringer -type=BalanceChangeReason -output gen_balance_change_reason_stringer.go
+
 const (
 	BalanceChangeUnspecified BalanceChangeReason = 0