omitempty fields from supply tracer output

eth/tracers/internal/tracetest/supply_test.go

@@ -45,19 +45,19 @@ import (
 
 type supplyInfoIssuance struct {
 	GenesisAlloc *hexutil.Big `json:"genesisAlloc,omitempty"`
-	Reward       *hexutil.Big `json:"reward"`
+	Reward       *hexutil.Big `json:"reward,omitempty"`
-	Withdrawals  *hexutil.Big `json:"withdrawals"`
+	Withdrawals  *hexutil.Big `json:"withdrawals,omitempty"`
 }
 
 type supplyInfoBurn struct {
-	EIP1559 *hexutil.Big `json:"1559"`
+	EIP1559 *hexutil.Big `json:"1559,omitempty"`
-	Blob    *hexutil.Big `json:"blob"`
+	Blob    *hexutil.Big `json:"blob,omitempty"`
-	Misc    *hexutil.Big `json:"misc"`
+	Misc    *hexutil.Big `json:"misc,omitempty"`
 }
 
 type supplyInfo struct {
-	Issuance *supplyInfoIssuance `json:"issuance"`
+	Issuance *supplyInfoIssuance `json:"issuance,omitempty"`
-	Burn     *supplyInfoBurn     `json:"burn"`
+	Burn     *supplyInfoBurn     `json:"burn,omitempty"`
 
 	// Block info
 	Number     uint64      `json:"blockNumber"`
@@ -89,13 +89,6 @@ func TestSupplyGenesisAlloc(t *testing.T) {
 	expected := supplyInfo{
 		Issuance: &supplyInfoIssuance{
 			GenesisAlloc: (*hexutil.Big)(new(big.Int).Mul(common.Big2, big.NewInt(params.Ether))),
-			Reward:       (*hexutil.Big)(common.Big0),
-			Withdrawals:  (*hexutil.Big)(common.Big0),
-		},
-		Burn: &supplyInfoBurn{
-			EIP1559: (*hexutil.Big)(common.Big0),
-			Blob:    (*hexutil.Big)(common.Big0),
-			Misc:    (*hexutil.Big)(common.Big0),
 		},
 		Number:     0,
 		Hash:       common.HexToHash("0xbcc9466e9fc6a8b56f4b29ca353a421ff8b51a0c1a58ca4743b427605b08f2ca"),
@@ -123,13 +116,7 @@ func TestSupplyRewards(t *testing.T) {
 
 	expected := supplyInfo{
 		Issuance: &supplyInfoIssuance{
-			Reward:      (*hexutil.Big)(new(big.Int).Mul(common.Big2, big.NewInt(params.Ether))),
+			Reward: (*hexutil.Big)(new(big.Int).Mul(common.Big2, big.NewInt(params.Ether))),
-			Withdrawals: (*hexutil.Big)(common.Big0),
-		},
-		Burn: &supplyInfoBurn{
-			EIP1559: (*hexutil.Big)(common.Big0),
-			Blob:    (*hexutil.Big)(common.Big0),
-			Misc:    (*hexutil.Big)(common.Big0),
 		},
 		Number:     1,
 		Hash:       common.HexToHash("0xcbb08370505be503dafedc4e96d139ea27aba3cbc580148568b8a307b3f51052"),
@@ -193,13 +180,10 @@ func TestSupplyEip1559Burn(t *testing.T) {
 		burn     = new(big.Int).Mul(big.NewInt(21000), head.BaseFee)
 		expected = supplyInfo{
 			Issuance: &supplyInfoIssuance{
-				Reward:      (*hexutil.Big)(reward),
+				Reward: (*hexutil.Big)(reward),
-				Withdrawals: (*hexutil.Big)(common.Big0),
 			},
 			Burn: &supplyInfoBurn{
 				EIP1559: (*hexutil.Big)(burn),
-				Blob:    (*hexutil.Big)(common.Big0),
-				Misc:    (*hexutil.Big)(common.Big0),
 			},
 			Number:     1,
 			Hash:       head.Hash(),
@@ -238,14 +222,8 @@ func TestSupplyWithdrawals(t *testing.T) {
 		head     = chain.CurrentBlock()
 		expected = supplyInfo{
 			Issuance: &supplyInfoIssuance{
-				Reward:      (*hexutil.Big)(common.Big0),
 				Withdrawals: (*hexutil.Big)(big.NewInt(1337000000000)),
 			},
-			Burn: &supplyInfoBurn{
-				EIP1559: (*hexutil.Big)(common.Big0),
-				Blob:    (*hexutil.Big)(common.Big0),
-				Misc:    (*hexutil.Big)(common.Big0),
-			},
 			Number:     1,
 			Hash:       head.Hash(),
 			ParentHash: head.ParentHash,
@@ -338,13 +316,8 @@ func TestSupplySelfdestruct(t *testing.T) {
 	head := preCancunChain.CurrentBlock()
 	// Check live trace output
 	expected := supplyInfo{
-		Issuance: &supplyInfoIssuance{
-			Reward:      (*hexutil.Big)(common.Big0),
-			Withdrawals: (*hexutil.Big)(common.Big0),
-		},
 		Burn: &supplyInfoBurn{
 			EIP1559: (*hexutil.Big)(big.NewInt(55289500000000)),
-			Blob:    (*hexutil.Big)(common.Big0),
 			Misc:    (*hexutil.Big)(big.NewInt(5000000000)),
 		},
 		Number:     1,
@@ -384,14 +357,8 @@ func TestSupplySelfdestruct(t *testing.T) {
 	// Check live trace output
 	head = postCancunChain.CurrentBlock()
 	expected = supplyInfo{
-		Issuance: &supplyInfoIssuance{
-			Reward:      (*hexutil.Big)(common.Big0),
-			Withdrawals: (*hexutil.Big)(common.Big0),
-		},
 		Burn: &supplyInfoBurn{
 			EIP1559: (*hexutil.Big)(big.NewInt(55289500000000)),
-			Blob:    (*hexutil.Big)(common.Big0),
-			Misc:    (*hexutil.Big)(common.Big0),
 		},
 		Number:     1,
 		Hash:       head.Hash(),
@@ -535,13 +502,8 @@ func TestSupplySelfdestructItselfAndRevert(t *testing.T) {
 	block := chain.GetBlockByNumber(1)
 
 	expected := supplyInfo{
-		Issuance: &supplyInfoIssuance{
-			Reward:      (*hexutil.Big)(common.Big0),
-			Withdrawals: (*hexutil.Big)(common.Big0),
-		},
 		Burn: &supplyInfoBurn{
 			EIP1559: (*hexutil.Big)(new(big.Int).Mul(block.BaseFee(), big.NewInt(int64(block.GasUsed())))),
-			Blob:    (*hexutil.Big)(common.Big0),
 			Misc:    (*hexutil.Big)(eth5), // 5ETH burned from contract B
 		},
 		Number:     1,

eth/tracers/live/gen_supplyinfoburn.go

@@ -14,9 +14,9 @@ var _ = (*supplyInfoBurnMarshaling)(nil)
 // MarshalJSON marshals as JSON.
 func (s supplyInfoBurn) MarshalJSON() ([]byte, error) {
 	type supplyInfoBurn struct {
-		EIP1559 *hexutil.Big `json:"1559"`
+		EIP1559 *hexutil.Big `json:"1559,omitempty"`
-		Blob    *hexutil.Big `json:"blob"`
+		Blob    *hexutil.Big `json:"blob,omitempty"`
-		Misc    *hexutil.Big `json:"misc"`
+		Misc    *hexutil.Big `json:"misc,omitempty"`
 	}
 	var enc supplyInfoBurn
 	enc.EIP1559 = (*hexutil.Big)(s.EIP1559)
@@ -28,9 +28,9 @@ func (s supplyInfoBurn) MarshalJSON() ([]byte, error) {
 // UnmarshalJSON unmarshals from JSON.
 func (s *supplyInfoBurn) UnmarshalJSON(input []byte) error {
 	type supplyInfoBurn struct {
-		EIP1559 *hexutil.Big `json:"1559"`
+		EIP1559 *hexutil.Big `json:"1559,omitempty"`
-		Blob    *hexutil.Big `json:"blob"`
+		Blob    *hexutil.Big `json:"blob,omitempty"`
-		Misc    *hexutil.Big `json:"misc"`
+		Misc    *hexutil.Big `json:"misc,omitempty"`
 	}
 	var dec supplyInfoBurn
 	if err := json.Unmarshal(input, &dec); err != nil {

eth/tracers/live/gen_supplyinfoissuance.go

@@ -15,8 +15,8 @@ var _ = (*supplyInfoIssuanceMarshaling)(nil)
 func (s supplyInfoIssuance) MarshalJSON() ([]byte, error) {
 	type supplyInfoIssuance struct {
 		GenesisAlloc *hexutil.Big `json:"genesisAlloc,omitempty"`
-		Reward       *hexutil.Big `json:"reward"`
+		Reward       *hexutil.Big `json:"reward,omitempty"`
-		Withdrawals  *hexutil.Big `json:"withdrawals"`
+		Withdrawals  *hexutil.Big `json:"withdrawals,omitempty"`
 	}
 	var enc supplyInfoIssuance
 	enc.GenesisAlloc = (*hexutil.Big)(s.GenesisAlloc)
@@ -29,8 +29,8 @@ func (s supplyInfoIssuance) MarshalJSON() ([]byte, error) {
 func (s *supplyInfoIssuance) UnmarshalJSON(input []byte) error {
 	type supplyInfoIssuance struct {
 		GenesisAlloc *hexutil.Big `json:"genesisAlloc,omitempty"`
-		Reward       *hexutil.Big `json:"reward"`
+		Reward       *hexutil.Big `json:"reward,omitempty"`
-		Withdrawals  *hexutil.Big `json:"withdrawals"`
+		Withdrawals  *hexutil.Big `json:"withdrawals,omitempty"`
 	}
 	var dec supplyInfoIssuance
 	if err := json.Unmarshal(input, &dec); err != nil {

eth/tracers/live/supply.go

@@ -24,8 +24,8 @@ func init() {
 
 type supplyInfoIssuance struct {
 	GenesisAlloc *big.Int `json:"genesisAlloc,omitempty"`
-	Reward       *big.Int `json:"reward"`
+	Reward       *big.Int `json:"reward,omitempty"`
-	Withdrawals  *big.Int `json:"withdrawals"`
+	Withdrawals  *big.Int `json:"withdrawals,omitempty"`
 }
 
 //go:generate go run github.com/fjl/gencodec -type supplyInfoIssuance -field-override supplyInfoIssuanceMarshaling -out gen_supplyinfoissuance.go
@@ -36,9 +36,9 @@ type supplyInfoIssuanceMarshaling struct {
 }
 
 type supplyInfoBurn struct {
-	EIP1559 *big.Int `json:"1559"`
+	EIP1559 *big.Int `json:"1559,omitempty"`
-	Blob    *big.Int `json:"blob"`
+	Blob    *big.Int `json:"blob,omitempty"`
-	Misc    *big.Int `json:"misc"`
+	Misc    *big.Int `json:"misc,omitempty"`
 }
 
 //go:generate go run github.com/fjl/gencodec -type supplyInfoBurn -field-override supplyInfoBurnMarshaling -out gen_supplyinfoburn.go
@@ -49,8 +49,8 @@ type supplyInfoBurnMarshaling struct {
 }
 
 type supplyInfo struct {
-	Issuance *supplyInfoIssuance `json:"issuance"`
+	Issuance *supplyInfoIssuance `json:"issuance,omitempty"`
-	Burn     *supplyInfoBurn     `json:"burn"`
+	Burn     *supplyInfoBurn     `json:"burn,omitempty"`
 
 	// Block info
 	Number     uint64      `json:"blockNumber"`
@@ -116,9 +116,7 @@ func newSupplyInfo() supplyInfo {
 			Withdrawals: big.NewInt(0),
 		},
 		Burn: &supplyInfoBurn{
-			EIP1559: big.NewInt(0),
+			Misc: big.NewInt(0),
-			Blob:    big.NewInt(0),
-			Misc:    big.NewInt(0),
 		},
 
 		Number:     0,
@@ -141,7 +139,9 @@ func (s *supply) OnBlockStart(ev tracing.BlockEvent) {
 	// Calculate Burn for this block
 	if ev.Block.BaseFee() != nil {
 		burn := new(big.Int).Mul(new(big.Int).SetUint64(ev.Block.GasUsed()), ev.Block.BaseFee())
-		s.delta.Burn.EIP1559.Add(s.delta.Burn.EIP1559, burn)
+		if burn.Sign() != 0 {
+			s.delta.Burn.EIP1559 = burn
+		}
 	}
 	// Blob burnt gas
 	if blobGas := ev.Block.BlobGasUsed(); blobGas != nil && *blobGas > 0 && ev.Block.ExcessBlobGas() != nil {
@@ -150,7 +150,7 @@ func (s *supply) OnBlockStart(ev tracing.BlockEvent) {
 			baseFee = eip4844.CalcBlobFee(excess)
 			burn    = new(big.Int).Mul(new(big.Int).SetUint64(*blobGas), baseFee)
 		)
-		s.delta.Burn.Blob.Add(s.delta.Burn.Blob, burn)
+		s.delta.Burn.Blob = burn
 	}
 }
 
@@ -262,7 +262,34 @@ func (s *supply) OnClose() {
 }
 
 func (s *supply) write(data any) {
-	out, _ := json.Marshal(data)
+	supply, ok := data.(supplyInfo)
+	if !ok {
+		log.Warn("failed to cast supply tracer data on write to log file")
+		return
+	}
+
+	// Remove empty fields
+	if supply.Issuance.Reward.Sign() == 0 {
+		supply.Issuance.Reward = nil
+	}
+
+	if supply.Issuance.Withdrawals.Sign() == 0 {
+		supply.Issuance.Withdrawals = nil
+	}
+
+	if supply.Issuance.GenesisAlloc == nil && supply.Issuance.Reward == nil && supply.Issuance.Withdrawals == nil {
+		supply.Issuance = nil
+	}
+
+	if supply.Burn.Misc.Sign() == 0 {
+		supply.Burn.Misc = nil
+	}
+
+	if supply.Burn.EIP1559 == nil && supply.Burn.Blob == nil && supply.Burn.Misc == nil {
+		supply.Burn = nil
+	}
+
+	out, _ := json.Marshal(supply)
 	if _, err := s.logger.Write(out); err != nil {
 		log.Warn("failed to write to supply tracer log file", "error", err)
 	}