use stringer to generate BalanceChangeReason String method

https://pkg.go.dev/golang.org/x/tools/cmd/stringer

core/tracing/gen_balance_change_reason_stringer.go

@@ -0,0 +1,37 @@
+// Code generated by "stringer -type=BalanceChangeReason -output gen_balance_change_reason_stringer.go"; DO NOT EDIT.
+
+package tracing
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[BalanceChangeUnspecified-0]
+	_ = x[BalanceIncreaseRewardMineUncle-1]
+	_ = x[BalanceIncreaseRewardMineBlock-2]
+	_ = x[BalanceIncreaseWithdrawal-3]
+	_ = x[BalanceIncreaseGenesisBalance-4]
+	_ = x[BalanceIncreaseRewardTransactionFee-5]
+	_ = x[BalanceDecreaseGasBuy-6]
+	_ = x[BalanceIncreaseGasReturn-7]
+	_ = x[BalanceIncreaseDaoContract-8]
+	_ = x[BalanceDecreaseDaoAccount-9]
+	_ = x[BalanceChangeTransfer-10]
+	_ = x[BalanceChangeTouchAccount-11]
+	_ = x[BalanceIncreaseSelfdestruct-12]
+	_ = x[BalanceDecreaseSelfdestruct-13]
+	_ = x[BalanceDecreaseSelfdestructBurn-14]
+}
+
+const _BalanceChangeReason_name = "BalanceChangeUnspecifiedBalanceIncreaseRewardMineUncleBalanceIncreaseRewardMineBlockBalanceIncreaseWithdrawalBalanceIncreaseGenesisBalanceBalanceIncreaseRewardTransactionFeeBalanceDecreaseGasBuyBalanceIncreaseGasReturnBalanceIncreaseDaoContractBalanceDecreaseDaoAccountBalanceChangeTransferBalanceChangeTouchAccountBalanceIncreaseSelfdestructBalanceDecreaseSelfdestructBalanceDecreaseSelfdestructBurn"
+
+var _BalanceChangeReason_index = [...]uint16{0, 24, 54, 84, 109, 138, 173, 194, 218, 244, 269, 290, 315, 342, 369, 400}
+
+func (i BalanceChangeReason) String() string {
+	if i >= BalanceChangeReason(len(_BalanceChangeReason_index)-1) {
+		return "BalanceChangeReason(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _BalanceChangeReason_name[_BalanceChangeReason_index[i]:_BalanceChangeReason_index[i+1]]
+}

core/tracing/hooks.go

@@ -169,6 +169,8 @@ 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
 
@@ -214,44 +216,6 @@ const (
 	BalanceDecreaseSelfdestructBurn BalanceChangeReason = 14
 )
 
-// String returns a string representation of the reason.
-func (r BalanceChangeReason) String() string {
-	switch r {
-	case BalanceChangeUnspecified:
-		return "BalanceChangeUnspecified"
-	case BalanceIncreaseRewardMineUncle:
-		return "BalanceIncreaseRewardMineUncle"
-	case BalanceIncreaseRewardMineBlock:
-		return "BalanceIncreaseRewardMineBlock"
-	case BalanceIncreaseWithdrawal:
-		return "BalanceIncreaseWithdrawal"
-	case BalanceIncreaseGenesisBalance:
-		return "BalanceIncreaseGenesisBalance"
-	case BalanceIncreaseRewardTransactionFee:
-		return "BalanceIncreaseRewardTransactionFee"
-	case BalanceDecreaseGasBuy:
-		return "BalanceDecreaseGasBuy"
-	case BalanceIncreaseGasReturn:
-		return "BalanceIncreaseGasReturn"
-	case BalanceIncreaseDaoContract:
-		return "BalanceIncreaseDaoContract"
-	case BalanceDecreaseDaoAccount:
-		return "BalanceDecreaseDaoAccount"
-	case BalanceChangeTransfer:
-		return "BalanceChangeTransfer"
-	case BalanceChangeTouchAccount:
-		return "BalanceChangeTouchAccount"
-	case BalanceIncreaseSelfdestruct:
-		return "BalanceIncreaseSelfdestruct"
-	case BalanceDecreaseSelfdestruct:
-		return "BalanceDecreaseSelfdestruct"
-	case BalanceDecreaseSelfdestructBurn:
-		return "BalanceDecreaseSelfdestructBurn"
-	default:
-		return "unknown"
-	}
-}
-
 // GasChangeReason is used to indicate the reason for a gas change, useful
 // for tracing and reporting.
 //