diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index aa88288119..0da685f5dc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,7 +16,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: actions/setup-go@v2
         with:
           go-version: 1.17
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 2e79ea8ba8..6e67a0c677 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -39,7 +39,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2.4.0
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/deploy-contract.yml b/.github/workflows/deploy-contract.yml
index db9da8113c..d3f32f61c0 100644
--- a/.github/workflows/deploy-contract.yml
+++ b/.github/workflows/deploy-contract.yml
@@ -16,7 +16,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - name: Use Node.js
         uses: actions/setup-node@v3
         with:
diff --git a/.github/workflows/goreleaser.yml b/.github/workflows/goreleaser.yml
index f68eeee1d5..0b4fc31f96 100644
--- a/.github/workflows/goreleaser.yml
+++ b/.github/workflows/goreleaser.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: release
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
         with:
           submodules: true
       - name: Set up Go
diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
index c1597dc872..a897fd5d16 100644
--- a/.github/workflows/labeler.yml
+++ b/.github/workflows/labeler.yml
@@ -9,6 +9,6 @@ jobs:
   triage:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/labeler@v3
+    - uses: actions/labeler@v4
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
diff --git a/.github/workflows/linkchecker.yml b/.github/workflows/linkchecker.yml
index 27c6ca715c..b3dff79233 100644
--- a/.github/workflows/linkchecker.yml
+++ b/.github/workflows/linkchecker.yml
@@ -6,7 +6,7 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: gaurav-nelson/github-action-markdown-link-check@1.0.13
         with:
           folder-path: "docs"
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 2c10b6c206..ca4509eaeb 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: technote-space/get-diff-action@v6.0.1
         with:
           SUFFIX_FILTER: |
diff --git a/.github/workflows/proto.yml b/.github/workflows/proto.yml
index 416bd58a7f..84d6dff6d7 100644
--- a/.github/workflows/proto.yml
+++ b/.github/workflows/proto.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: technote-space/get-diff-action@v6.0.1
         with:
           PATTERNS: |
@@ -20,7 +20,7 @@ jobs:
   breakage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: technote-space/get-diff-action@v6.0.1
         with:
           PATTERNS: |
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 83158ae57a..43b1376fd0 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -12,7 +12,7 @@ jobs:
       GO111MODULE: on
     steps:
       - name: Checkout Source
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
       - name: Get Diff
         uses: technote-space/get-diff-action@v6.0.1
         with:
diff --git a/.github/workflows/semgrep.yml b/.github/workflows/semgrep.yml
index 9570d52ddc..b016762d53 100644
--- a/.github/workflows/semgrep.yml
+++ b/.github/workflows/semgrep.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     if: (github.actor != 'dependabot[bot]')
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Get Diff
         uses: technote-space/get-diff-action@v6.0.1
         with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3f677b263e..5587009ac3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -37,7 +37,7 @@ jobs:
       - uses: actions/setup-go@v2.1.4
         with:
           go-version: 1.17
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: technote-space/get-diff-action@v6.0.1
         with:
           PATTERNS: |
@@ -62,7 +62,7 @@ jobs:
       - uses: actions/setup-go@v2.1.4
         with:
           go-version: 1.17
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: technote-space/get-diff-action@v6.0.1
         id: git_diff
         with:
@@ -83,7 +83,7 @@ jobs:
       matrix:
         batch: ['1-3', '2-3', '3-3']
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: actions/setup-go@v2
         with:
           go-version: 1.17
@@ -106,7 +106,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: actions/setup-go@v2.1.4
         with:
           go-version: 1.17
@@ -138,7 +138,7 @@ jobs:
       - uses: actions/setup-go@v2.1.4
         with:
           go-version: 1.17
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: technote-space/get-diff-action@v6.0.1
         with:
           PATTERNS: |
@@ -158,7 +158,7 @@ jobs:
       - uses: actions/setup-go@v2.1.4
         with:
           go-version: 1.17
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: technote-space/get-diff-action@v6.0.1
         with:
           PATTERNS: |
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 794def139f..a0cc3274fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,6 +36,17 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 # Changelog
 
+## [v0.10.1] - 2022-03-04
+
+### Bug Fixes
+
+* (rpc) [tharsis##970](https://github.com/tharsis/ethermint/pull/970) Fix unexpected nil reward values on `eth_feeHistory` response
+* (evm) [tharsis##529](https://github.com/tharsis/ethermint/issues/529) Add support return value on trace tx response.
+
+## Improvements
+
+* (rpc) [tharsis##968](https://github.com/tharsis/ethermint/pull/968) Add some buffer to returned gas price to provide better default UX for client.
+
 ## [v0.10.0] - 2022-02-26
 
 ### API Breaking
diff --git a/rpc/ethereum/backend/backend.go b/rpc/ethereum/backend/backend.go
index 850737dcb5..c337444120 100644
--- a/rpc/ethereum/backend/backend.go
+++ b/rpc/ethereum/backend/backend.go
@@ -50,7 +50,7 @@ type Backend interface {
 	RPCTxFeeCap() float64         // RPCTxFeeCap is the global transaction fee(price * gaslimit) cap for send-transaction variants. The unit is ether.
 
 	RPCMinGasPrice() int64
-	SuggestGasTipCap() (*big.Int, error)
+	SuggestGasTipCap(baseFee *big.Int) (*big.Int, error)
 
 	// Blockchain API
 	BlockNumber() (hexutil.Uint64, error)
@@ -954,9 +954,34 @@ func (e *EVMBackend) ChainConfig() *params.ChainConfig {
 }
 
 // SuggestGasTipCap returns the suggested tip cap
-// always return zero since we don't support tx prioritization yet.
-func (e *EVMBackend) SuggestGasTipCap() (*big.Int, error) {
-	return big.NewInt(0), nil
+// Although we don't support tx prioritization yet, but we return a positive value to help client to
+// mitigate the base fee changes.
+func (e *EVMBackend) SuggestGasTipCap(baseFee *big.Int) (*big.Int, error) {
+	if baseFee == nil {
+		// london hardfork not enabled or feemarket not enabeld
+		return big.NewInt(0), nil
+	}
+
+	params, err := e.queryClient.FeeMarket.Params(e.ctx, &feemarkettypes.QueryParamsRequest{})
+	if err != nil {
+		return nil, err
+	}
+	// calculate the maximum base fee delta in current block, assuming all block gas limit is consumed
+	// ```
+	// GasTarget = GasLimit / ElasticityMultiplier
+	// Delta = BaseFee * (GasUsed - GasTarget) / GasTarget / Denominator
+	// ```
+	// The delta is at maximum when `GasUsed` is equal to `GasLimit`, which is:
+	// ```
+	// MaxDelta = BaseFee * (GasLimit - GasLimit / ElasticityMultiplier) / (GasLimit / ElasticityMultiplier) / Denominator
+	//          = BaseFee * (ElasticityMultiplier - 1) / Denominator
+	// ```
+	maxDelta := baseFee.Int64() * (int64(params.Params.ElasticityMultiplier) - 1) / int64(params.Params.BaseFeeChangeDenominator)
+	if maxDelta < 0 {
+		// impossible if the parameter validation passed.
+		maxDelta = 0
+	}
+	return big.NewInt(maxDelta), nil
 }
 
 // BaseFee returns the base fee tracked by the Fee Market module. If the base fee is not enabled,
diff --git a/rpc/ethereum/backend/feebackend.go b/rpc/ethereum/backend/feebackend.go
index a02cc5803f..b09b5d421b 100644
--- a/rpc/ethereum/backend/feebackend.go
+++ b/rpc/ethereum/backend/feebackend.go
@@ -115,6 +115,7 @@ func (e *EVMBackend) processBlock(
 	return nil
 }
 
+// FeeHistory returns data relevant for fee estimation based on the specified range of blocks.
 func (e *EVMBackend) FeeHistory(
 	userBlockCount rpc.DecimalOrHex, // number blocks to fetch, maximum is 100
 	lastBlock rpc.BlockNumber, // the block to start search , to oldest
@@ -145,13 +146,16 @@ func (e *EVMBackend) FeeHistory(
 
 	// prepare space
 	reward := make([][]*hexutil.Big, blockCount)
-	rewardcount := len(rewardPercentiles)
+	rewardCount := len(rewardPercentiles)
 	for i := 0; i < int(blockCount); i++ {
-		reward[i] = make([]*hexutil.Big, rewardcount)
+		reward[i] = make([]*hexutil.Big, rewardCount)
 	}
 	thisBaseFee := make([]*hexutil.Big, blockCount)
 	thisGasUsedRatio := make([]float64, blockCount)
 
+	// rewards should only be calculated if reward percentiles were included
+	calculateRewards := rewardCount != 0
+
 	// fetch block
 	for blockID := blockStart; blockID < blockEnd; blockID++ {
 		index := int32(blockID - blockStart)
@@ -174,25 +178,34 @@ func (e *EVMBackend) FeeHistory(
 			return nil, err
 		}
 
-		onefeehistory := rpctypes.OneFeeHistory{}
-		err = e.processBlock(tendermintblock, &ethBlock, rewardPercentiles, tendermintBlockResult, &onefeehistory)
+		oneFeeHistory := rpctypes.OneFeeHistory{}
+		err = e.processBlock(tendermintblock, &ethBlock, rewardPercentiles, tendermintBlockResult, &oneFeeHistory)
 		if err != nil {
 			return nil, err
 		}
 
 		// copy
-		thisBaseFee[index] = (*hexutil.Big)(onefeehistory.BaseFee)
-		thisGasUsedRatio[index] = onefeehistory.GasUsedRatio
-		for j := 0; j < rewardcount; j++ {
-			reward[index][j] = (*hexutil.Big)(onefeehistory.Reward[j])
+		thisBaseFee[index] = (*hexutil.Big)(oneFeeHistory.BaseFee)
+		thisGasUsedRatio[index] = oneFeeHistory.GasUsedRatio
+		if calculateRewards {
+			for j := 0; j < rewardCount; j++ {
+				reward[index][j] = (*hexutil.Big)(oneFeeHistory.Reward[j])
+				if reward[index][j] == nil {
+					reward[index][j] = (*hexutil.Big)(big.NewInt(0))
+				}
+			}
 		}
 	}
 
 	feeHistory := rpctypes.FeeHistoryResult{
 		OldestBlock:  oldestBlock,
-		Reward:       reward,
 		BaseFee:      thisBaseFee,
 		GasUsedRatio: thisGasUsedRatio,
 	}
+
+	if calculateRewards {
+		feeHistory.Reward = reward
+	}
+
 	return &feeHistory, nil
 }
diff --git a/rpc/ethereum/backend/utils.go b/rpc/ethereum/backend/utils.go
index dc8884eb19..16e129f02f 100644
--- a/rpc/ethereum/backend/utils.go
+++ b/rpc/ethereum/backend/utils.go
@@ -31,19 +31,16 @@ func (e *EVMBackend) SetTxDefaults(args evmtypes.TransactionArgs) (evmtypes.Tran
 		return args, errors.New("latest header is nil")
 	}
 
-	cfg := e.ChainConfig()
-
 	// If user specifies both maxPriorityfee and maxFee, then we do not
 	// need to consult the chain for defaults. It's definitely a London tx.
 	if args.MaxPriorityFeePerGas == nil || args.MaxFeePerGas == nil {
 		// In this clause, user left some fields unspecified.
-		if cfg.IsLondon(head.Number) && args.GasPrice == nil {
+		if head.BaseFee != nil && args.GasPrice == nil {
 			if args.MaxPriorityFeePerGas == nil {
-				tip, err := e.SuggestGasTipCap()
+				tip, err := e.SuggestGasTipCap(head.BaseFee)
 				if err != nil {
 					return args, err
 				}
-
 				args.MaxPriorityFeePerGas = (*hexutil.Big)(tip)
 			}
 
@@ -65,12 +62,11 @@ func (e *EVMBackend) SetTxDefaults(args evmtypes.TransactionArgs) (evmtypes.Tran
 			}
 
 			if args.GasPrice == nil {
-				price, err := e.SuggestGasTipCap()
+				price, err := e.SuggestGasTipCap(head.BaseFee)
 				if err != nil {
 					return args, err
 				}
-
-				if cfg.IsLondon(head.Number) {
+				if head.BaseFee != nil {
 					// The legacy tx gas price suggestion should not add 2x base fee
 					// because all fees are consumed, so it would result in a spiral
 					// upwards.
diff --git a/rpc/ethereum/namespaces/eth/api.go b/rpc/ethereum/namespaces/eth/api.go
index 57a963ce99..2d6ac9645d 100644
--- a/rpc/ethereum/namespaces/eth/api.go
+++ b/rpc/ethereum/namespaces/eth/api.go
@@ -202,7 +202,7 @@ func (e *PublicAPI) GasPrice() (*hexutil.Big, error) {
 		err    error
 	)
 	if head := e.backend.CurrentHeader(); head.BaseFee != nil {
-		result, err = e.backend.SuggestGasTipCap()
+		result, err = e.backend.SuggestGasTipCap(head.BaseFee)
 		if err != nil {
 			return nil, err
 		}
@@ -218,11 +218,11 @@ func (e *PublicAPI) GasPrice() (*hexutil.Big, error) {
 // MaxPriorityFeePerGas returns a suggestion for a gas tip cap for dynamic fee transactions.
 func (e *PublicAPI) MaxPriorityFeePerGas() (*hexutil.Big, error) {
 	e.logger.Debug("eth_maxPriorityFeePerGas")
-	tipcap, err := e.backend.SuggestGasTipCap()
+	head := e.backend.CurrentHeader()
+	tipcap, err := e.backend.SuggestGasTipCap(head.BaseFee)
 	if err != nil {
 		return nil, err
 	}
-
 	return (*hexutil.Big)(tipcap), nil
 }
 
diff --git a/x/evm/keeper/grpc_query.go b/x/evm/keeper/grpc_query.go
index 7c2222ab77..0400e3e511 100644
--- a/x/evm/keeper/grpc_query.go
+++ b/x/evm/keeper/grpc_query.go
@@ -544,11 +544,17 @@ func (k *Keeper) traceTx(
 	// Depending on the tracer type, format and return the trace result data.
 	switch tracer := tracer.(type) {
 	case *logger.StructLogger:
-		// TODO: Return proper returnValue
+		returnVal := ""
+		revert := res.Revert()
+		if len(revert) > 0 {
+			returnVal = fmt.Sprintf("%x", revert)
+		} else {
+			returnVal = fmt.Sprintf("%x", res.Return())
+		}
 		result = types.ExecutionResult{
 			Gas:         res.GasUsed,
 			Failed:      res.Failed(),
-			ReturnValue: "",
+			ReturnValue: returnVal,
 			StructLogs:  types.FormatLogs(tracer.StructLogs()),
 		}
 	case tracers.Tracer:
diff --git a/x/evm/keeper/grpc_query_test.go b/x/evm/keeper/grpc_query_test.go
index a4e49403c5..690e67b709 100644
--- a/x/evm/keeper/grpc_query_test.go
+++ b/x/evm/keeper/grpc_query_test.go
@@ -624,7 +624,7 @@ func (suite *KeeperTestSuite) TestTraceTx() {
 				predecessors = []*types.MsgEthereumTx{}
 			},
 			expPass:       true,
-			traceResponse: []byte{0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x36, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x43, 0x6f, 0x73, 0x74, 0x22, 0x3a, 0x33, 0x2c, 0x22, 0x64, 0x65, 0x70, 0x74, 0x68, 0x22, 0x3a, 0x31, 0x2c, 0x22, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x22, 0x3a, 0x5b, 0x5d, 0x7d, 0x2c, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x32, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61},
+			traceResponse: []byte{0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a},
 		},
 		{
 			msg: "default trace with filtered response",
@@ -638,7 +638,7 @@ func (suite *KeeperTestSuite) TestTraceTx() {
 				predecessors = []*types.MsgEthereumTx{}
 			},
 			expPass:         true,
-			traceResponse:   []byte{0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x36, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x43, 0x6f, 0x73, 0x74, 0x22, 0x3a, 0x33, 0x2c, 0x22, 0x64, 0x65, 0x70, 0x74, 0x68, 0x22, 0x3a, 0x31, 0x7d, 0x2c, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x32, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x33, 0x2c, 0x22, 0x67},
+			traceResponse:   []byte{0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a},
 			enableFeemarket: false,
 		},
 		{
@@ -665,7 +665,7 @@ func (suite *KeeperTestSuite) TestTraceTx() {
 				predecessors = []*types.MsgEthereumTx{}
 			},
 			expPass:         true,
-			traceResponse:   []byte{0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x36, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x43, 0x6f, 0x73, 0x74, 0x22, 0x3a, 0x33, 0x2c, 0x22, 0x64, 0x65, 0x70, 0x74, 0x68, 0x22, 0x3a, 0x31, 0x7d, 0x2c, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x32, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x33, 0x2c, 0x22, 0x67},
+			traceResponse:   []byte{0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a},
 			enableFeemarket: true,
 		},
 		{
@@ -702,7 +702,7 @@ func (suite *KeeperTestSuite) TestTraceTx() {
 				predecessors = append(predecessors, firstTx)
 			},
 			expPass:         true,
-			traceResponse:   []byte{0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x31, 0x33, 0x31, 0x39, 0x36, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x43, 0x6f, 0x73, 0x74, 0x22, 0x3a, 0x33, 0x2c, 0x22, 0x64, 0x65, 0x70, 0x74, 0x68, 0x22, 0x3a, 0x31, 0x2c, 0x22, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x22, 0x3a, 0x5b, 0x5d, 0x7d, 0x2c, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x32, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61},
+			traceResponse:   []byte{0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a},
 			enableFeemarket: false,
 		},
 	}
@@ -764,7 +764,7 @@ func (suite *KeeperTestSuite) TestTraceBlock() {
 				traceConfig = nil
 			},
 			expPass:       true,
-			traceResponse: []byte{0x5b, 0x7b, 0x22, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x22, 0x3a, 0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x36, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x43, 0x6f, 0x73, 0x74, 0x22, 0x3a, 0x33, 0x2c, 0x22, 0x64, 0x65, 0x70, 0x74, 0x68, 0x22, 0x3a, 0x31, 0x2c, 0x22, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x22, 0x3a, 0x5b, 0x5d, 0x7d, 0x2c, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x32, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a},
+			traceResponse: []byte{0x5b, 0x7b, 0x22, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x22, 0x3a, 0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55},
 		},
 		{
 			msg: "filtered trace",
@@ -776,7 +776,7 @@ func (suite *KeeperTestSuite) TestTraceBlock() {
 				}
 			},
 			expPass:       true,
-			traceResponse: []byte{0x5b, 0x7b, 0x22, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x22, 0x3a, 0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x36, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x43, 0x6f, 0x73, 0x74, 0x22, 0x3a, 0x33, 0x2c, 0x22, 0x64, 0x65, 0x70, 0x74, 0x68, 0x22, 0x3a, 0x31, 0x7d, 0x2c, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x32, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61},
+			traceResponse: []byte{0x5b, 0x7b, 0x22, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x22, 0x3a, 0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55},
 		},
 		{
 			msg: "javascript tracer",
@@ -798,7 +798,7 @@ func (suite *KeeperTestSuite) TestTraceBlock() {
 				}
 			},
 			expPass:         true,
-			traceResponse:   []byte{0x5b, 0x7b, 0x22, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x22, 0x3a, 0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x36, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x43, 0x6f, 0x73, 0x74, 0x22, 0x3a, 0x33, 0x2c, 0x22, 0x64, 0x65, 0x70, 0x74, 0x68, 0x22, 0x3a, 0x31, 0x7d, 0x2c, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x32, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61},
+			traceResponse:   []byte{0x5b, 0x7b, 0x22, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x22, 0x3a, 0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55},
 			enableFeemarket: true,
 		},
 		{
@@ -832,7 +832,7 @@ func (suite *KeeperTestSuite) TestTraceBlock() {
 				txs = append([]*types.MsgEthereumTx{}, firstTx, secondTx)
 			},
 			expPass:         true,
-			traceResponse:   []byte{0x5b, 0x7b, 0x22, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x22, 0x3a, 0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55, 0x53, 0x48, 0x31, 0x22, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x30, 0x32, 0x39, 0x36, 0x2c, 0x22, 0x67, 0x61, 0x73, 0x43, 0x6f, 0x73, 0x74, 0x22, 0x3a, 0x33, 0x2c, 0x22, 0x64, 0x65, 0x70, 0x74, 0x68, 0x22, 0x3a, 0x31, 0x2c, 0x22, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x22, 0x3a, 0x5b, 0x5d, 0x7d, 0x2c, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x32, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a},
+			traceResponse:   []byte{0x5b, 0x7b, 0x22, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x22, 0x3a, 0x7b, 0x22, 0x67, 0x61, 0x73, 0x22, 0x3a, 0x33, 0x34, 0x38, 0x32, 0x38, 0x2c, 0x22, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x2c, 0x22, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x3a, 0x22, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x22, 0x2c, 0x22, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x4c, 0x6f, 0x67, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x70, 0x63, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x6f, 0x70, 0x22, 0x3a, 0x22, 0x50, 0x55},
 			enableFeemarket: false,
 		},
 	}
diff --git a/x/evm/types/tx.go b/x/evm/types/tx.go
index d391dc1078..f5cfccb940 100644
--- a/x/evm/types/tx.go
+++ b/x/evm/types/tx.go
@@ -1,6 +1,29 @@
 package types
 
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/vm"
+)
+
 // Failed returns if the contract execution failed in vm errors
 func (m *MsgEthereumTxResponse) Failed() bool {
 	return len(m.VmError) > 0
 }
+
+// Return is a helper function to help caller distinguish between revert reason
+// and function return. Return returns the data after execution if no error occurs.
+func (m *MsgEthereumTxResponse) Return() []byte {
+	if m.Failed() {
+		return nil
+	}
+	return common.CopyBytes(m.Ret)
+}
+
+// Revert returns the concrete revert reason if the execution is aborted by `REVERT`
+// opcode. Note the reason can be nil if no data supplied with revert opcode.
+func (m *MsgEthereumTxResponse) Revert() []byte {
+	if m.VmError != vm.ErrExecutionReverted.Error() {
+		return nil
+	}
+	return common.CopyBytes(m.Ret)
+}