CHANGELOG.md

@@ -42,6 +42,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 * (rpc) [tharsis#1059](https://github.com/tharsis/ethermint/pull/1059) Remove unnecessary event filtering logic on the `eth_baseFee` JSON-RPC endpoint.
 
+### API Breaking
+
+* (rpc) [tharsis#1068](https://github.com/tharsis/ethermint/pull/1068) Fix london hardfork check logic in json-rpc apis.
+
 ## [v0.14.0] - 2022-04-19
 
 ### API Breaking

app/ante/eth.go

@@ -263,7 +263,7 @@ func (ctd CanTransferDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate
 			return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid message type %T, expected %T", msg, (*evmtypes.MsgEthereumTx)(nil))
 		}
 
-		baseFee := ctd.evmKeeper.BaseFee(ctx, ethCfg)
+		baseFee := ctd.evmKeeper.GetBaseFee(ctx, ethCfg)
 
 		coreMsg, err := msgEthTx.AsMessage(signer, baseFee)
 		if err != nil {
@@ -427,7 +427,7 @@ func (vbd EthValidateBasicDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simu
 			params := vbd.evmKeeper.GetParams(ctx)
 			chainID := vbd.evmKeeper.ChainID()
 			ethCfg := params.ChainConfig.EthereumConfig(chainID)
-			baseFee := vbd.evmKeeper.BaseFee(ctx, ethCfg)
+			baseFee := vbd.evmKeeper.GetBaseFee(ctx, ethCfg)
 			if baseFee == nil && txData.TxType() == ethtypes.DynamicFeeTxType {
 				return ctx, sdkerrors.Wrap(ethtypes.ErrTxTypeNotSupported, "dynamic fee tx not supported")
 			}
@@ -511,7 +511,7 @@ func (mfd EthMempoolFeeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulat
 	if ctx.IsCheckTx() && !simulate {
 		params := mfd.evmKeeper.GetParams(ctx)
 		ethCfg := params.ChainConfig.EthereumConfig(mfd.evmKeeper.ChainID())
-		baseFee := mfd.evmKeeper.BaseFee(ctx, ethCfg)
+		baseFee := mfd.evmKeeper.GetBaseFee(ctx, ethCfg)
 		if baseFee == nil {
 			for _, msg := range tx.GetMsgs() {
 				ethMsg, ok := msg.(*evmtypes.MsgEthereumTx)

app/ante/interfaces.go

@@ -23,7 +23,7 @@ type EVMKeeper interface {
 	DeductTxCostsFromUserBalance(
 		ctx sdk.Context, msgEthTx evmtypes.MsgEthereumTx, txData evmtypes.TxData, denom string, homestead, istanbul, london bool,
 	) (sdk.Coins, error)
-	BaseFee(ctx sdk.Context, ethCfg *params.ChainConfig) *big.Int
+	GetBaseFee(ctx sdk.Context, ethCfg *params.ChainConfig) *big.Int
 	GetBalance(ctx sdk.Context, addr common.Address) *big.Int
 	ResetTransientGasUsed(ctx sdk.Context)
 }

docs/api/proto-docs.md

@@ -39,6 +39,8 @@
     - [QueryAccountResponse](#ethermint.evm.v1.QueryAccountResponse)
     - [QueryBalanceRequest](#ethermint.evm.v1.QueryBalanceRequest)
     - [QueryBalanceResponse](#ethermint.evm.v1.QueryBalanceResponse)
+    - [QueryBaseFeeRequest](#ethermint.evm.v1.QueryBaseFeeRequest)
+    - [QueryBaseFeeResponse](#ethermint.evm.v1.QueryBaseFeeResponse)
     - [QueryCodeRequest](#ethermint.evm.v1.QueryCodeRequest)
     - [QueryCodeResponse](#ethermint.evm.v1.QueryCodeResponse)
     - [QueryCosmosAccountRequest](#ethermint.evm.v1.QueryCosmosAccountRequest)
@@ -618,6 +620,32 @@ QueryBalanceResponse is the response type for the Query/Balance RPC method.
 
 
 
+<a name="ethermint.evm.v1.QueryBaseFeeRequest"></a>
+
+### QueryBaseFeeRequest
+QueryBaseFeeRequest defines the request type for querying the EIP1559 base
+fee.
+
+
+
+
+
+
+<a name="ethermint.evm.v1.QueryBaseFeeResponse"></a>
+
+### QueryBaseFeeResponse
+BaseFeeResponse returns the EIP1559 base fee.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `base_fee` | [string](#string) |  |  |
+
+
+
+
+
+
 <a name="ethermint.evm.v1.QueryCodeRequest"></a>
 
 ### QueryCodeRequest
@@ -899,6 +927,7 @@ Query defines the gRPC querier service.
 | `EstimateGas` | [EthCallRequest](#ethermint.evm.v1.EthCallRequest) | [EstimateGasResponse](#ethermint.evm.v1.EstimateGasResponse) | EstimateGas implements the `eth_estimateGas` rpc api | GET|/ethermint/evm/v1/estimate_gas|
 | `TraceTx` | [QueryTraceTxRequest](#ethermint.evm.v1.QueryTraceTxRequest) | [QueryTraceTxResponse](#ethermint.evm.v1.QueryTraceTxResponse) | TraceTx implements the `debug_traceTransaction` rpc api | GET|/ethermint/evm/v1/trace_tx|
 | `TraceBlock` | [QueryTraceBlockRequest](#ethermint.evm.v1.QueryTraceBlockRequest) | [QueryTraceBlockResponse](#ethermint.evm.v1.QueryTraceBlockResponse) | TraceBlock implements the `debug_traceBlockByNumber` and `debug_traceBlockByHash` rpc api | GET|/ethermint/evm/v1/trace_block|
+| `BaseFee` | [QueryBaseFeeRequest](#ethermint.evm.v1.QueryBaseFeeRequest) | [QueryBaseFeeResponse](#ethermint.evm.v1.QueryBaseFeeResponse) | BaseFee queries the base fee of the parent block of the current block, it's similar to feemarket module's method, but also checks london hardfork status. | GET|/ethermint/evm/v1/base_fee|
 
  <!-- end services -->
 

proto/ethermint/evm/v1/query.proto

@@ -71,6 +71,13 @@ service Query {
   rpc TraceBlock(QueryTraceBlockRequest) returns (QueryTraceBlockResponse) {
     option (google.api.http).get = "/ethermint/evm/v1/trace_block";
   }
+
+  // BaseFee queries the base fee of the parent block of the current block,
+  // it's similar to feemarket module's method, but also checks london hardfork status.
+  rpc BaseFee(QueryBaseFeeRequest) returns (QueryBaseFeeResponse) {
+    option (google.api.http).get = "/ethermint/evm/v1/base_fee";
+  }
+
 }
 
 // QueryAccountRequest is the request type for the Query/Account RPC method.
@@ -271,3 +278,12 @@ message QueryTraceBlockResponse {
   bytes data = 1;
 }
 
+// QueryBaseFeeRequest defines the request type for querying the EIP1559 base
+// fee.
+message QueryBaseFeeRequest {}
+
+// BaseFeeResponse returns the EIP1559 base fee.
+message QueryBaseFeeResponse {
+  string base_fee = 1
+      [ (gogoproto.customtype) = "github.com/cosmos/cosmos-sdk/types.Int" ];
+}

rpc/ethereum/backend/backend.go

@@ -945,7 +945,7 @@ func (e *EVMBackend) RPCMinGasPrice() int64 {
 	return amt
 }
 
-// ChainConfig return the ethereum chain configuration
+// ChainConfig return the latest ethereum chain configuration
 func (e *EVMBackend) ChainConfig() *params.ChainConfig {
 	params, err := e.queryClient.Params(e.ctx, &evmtypes.QueryParamsRequest{})
 	if err != nil {
@@ -991,13 +991,8 @@ func (e *EVMBackend) SuggestGasTipCap(baseFee *big.Int) (*big.Int, error) {
 // If the London hard fork is not activated at the current height, the query will
 // return nil.
 func (e *EVMBackend) BaseFee(height int64) (*big.Int, error) {
-	cfg := e.ChainConfig()
-	if !cfg.IsLondon(new(big.Int).SetInt64(height)) {
-		return nil, nil
-	}
-
-	// return BaseFee if London hard fork is activated and feemarket is not enabled
-	res, err := e.queryClient.FeeMarket.BaseFee(types.ContextWithHeight(height), &feemarkettypes.QueryBaseFeeRequest{})
+	// return BaseFee if London hard fork is activated and feemarket is enabled
+	res, err := e.queryClient.BaseFee(types.ContextWithHeight(height), &evmtypes.QueryBaseFeeRequest{})
 	if err != nil {
 		return nil, err
 	}

x/evm/keeper/grpc_query.go

@@ -583,3 +583,20 @@ func (k *Keeper) traceTx(
 
 	return &result, txConfig.LogIndex + uint(len(res.Logs)), nil
 }
+
+// BaseFee implements the Query/BaseFee gRPC method
+func (k Keeper) BaseFee(c context.Context, _ *types.QueryBaseFeeRequest) (*types.QueryBaseFeeResponse, error) {
+	ctx := sdk.UnwrapSDKContext(c)
+
+	params := k.GetParams(ctx)
+	ethCfg := params.ChainConfig.EthereumConfig(k.eip155ChainID)
+	baseFee := k.GetBaseFee(ctx, ethCfg)
+
+	res := &types.QueryBaseFeeResponse{}
+	if baseFee != nil {
+		aux := sdk.NewIntFromBigInt(baseFee)
+		res.BaseFee = &aux
+	}
+
+	return res, nil
+}

x/evm/keeper/grpc_query_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/crypto"
+	ethparams "github.com/ethereum/go-ethereum/params"
 	"github.com/tharsis/ethermint/x/evm/statedb"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
@@ -899,3 +900,76 @@ func (suite *KeeperTestSuite) TestNonceInQuery() {
 	})
 	suite.Require().NoError(err)
 }
+
+func (suite *KeeperTestSuite) TestQueryBaseFee() {
+	var (
+		aux    sdk.Int
+		expRes *types.QueryBaseFeeResponse
+	)
+
+	testCases := []struct {
+		name            string
+		malleate        func()
+		expPass         bool
+		enableFeemarket bool
+		enableLondonHF  bool
+	}{
+		{
+			"pass - default Base Fee",
+			func() {
+				initialBaseFee := sdk.NewInt(ethparams.InitialBaseFee)
+				expRes = &types.QueryBaseFeeResponse{BaseFee: &initialBaseFee}
+			},
+			true, true, true,
+		},
+		{
+			"pass - non-nil Base Fee",
+			func() {
+				baseFee := sdk.OneInt().BigInt()
+				suite.app.FeeMarketKeeper.SetBaseFee(suite.ctx, baseFee)
+
+				aux = sdk.NewIntFromBigInt(baseFee)
+				expRes = &types.QueryBaseFeeResponse{BaseFee: &aux}
+			},
+			true, true, true,
+		},
+		{
+			"pass - nil Base Fee when london hardfork not activated",
+			func() {
+				baseFee := sdk.OneInt().BigInt()
+				suite.app.FeeMarketKeeper.SetBaseFee(suite.ctx, baseFee)
+
+				expRes = &types.QueryBaseFeeResponse{}
+			},
+			true, true, false,
+		},
+		{
+			"pass - zero Base Fee when feemarket not activated",
+			func() {
+				baseFee := sdk.ZeroInt()
+				expRes = &types.QueryBaseFeeResponse{BaseFee: &baseFee}
+			},
+			true, false, true,
+		},
+	}
+	for _, tc := range testCases {
+		suite.Run(tc.name, func() {
+			suite.enableFeemarket = tc.enableFeemarket
+			suite.enableLondonHF = tc.enableLondonHF
+			suite.SetupTest()
+
+			tc.malleate()
+
+			res, err := suite.queryClient.BaseFee(suite.ctx.Context(), &types.QueryBaseFeeRequest{})
+			if tc.expPass {
+				suite.Require().NotNil(res)
+				suite.Require().Equal(expRes, res, tc.name)
+				suite.Require().NoError(err)
+			} else {
+				suite.Require().Error(err)
+			}
+		})
+	}
+	suite.enableFeemarket = false
+	suite.enableLondonHF = true
+}

x/evm/keeper/keeper.go

@@ -291,7 +291,7 @@ func (k *Keeper) GetBalance(ctx sdk.Context, addr common.Address) *big.Int {
 // - `nil`: london hardfork not enabled.
 // - `0`: london hardfork enabled but feemarket is not enabled.
 // - `n`: both london hardfork and feemarket are enabled.
-func (k Keeper) BaseFee(ctx sdk.Context, ethCfg *params.ChainConfig) *big.Int {
+func (k Keeper) GetBaseFee(ctx sdk.Context, ethCfg *params.ChainConfig) *big.Int {
 	if !types.IsLondon(ethCfg, ctx.BlockHeight()) {
 		return nil
 	}

x/evm/keeper/keeper_test.go

@@ -404,7 +404,7 @@ func (suite *KeeperTestSuite) TestBaseFee() {
 			suite.app.EvmKeeper.BeginBlock(suite.ctx, abci.RequestBeginBlock{})
 			params := suite.app.EvmKeeper.GetParams(suite.ctx)
 			ethCfg := params.ChainConfig.EthereumConfig(suite.app.EvmKeeper.ChainID())
-			baseFee := suite.app.EvmKeeper.BaseFee(suite.ctx, ethCfg)
+			baseFee := suite.app.EvmKeeper.GetBaseFee(suite.ctx, ethCfg)
 			suite.Require().Equal(tc.expectBaseFee, baseFee)
 		})
 	}

x/evm/keeper/state_transition.go

@@ -46,7 +46,7 @@ func (k *Keeper) EVMConfig(ctx sdk.Context) (*types.EVMConfig, error) {
 		return nil, sdkerrors.Wrap(err, "failed to obtain coinbase address")
 	}
 
-	baseFee := k.BaseFee(ctx, ethCfg)
+	baseFee := k.GetBaseFee(ctx, ethCfg)
 	return &types.EVMConfig{
 		Params:      params,
 		ChainConfig: ethCfg,

x/evm/simulation/operations.go

@@ -210,7 +210,7 @@ func CreateRandomValidEthTx(ctx *simulateContext, from, to *common.Address, amou
 	gasLimit := estimateGas + uint64(ctx.rand.Intn(int(sdktx.MaxGasWanted-estimateGas)))
 	ethChainID := ctx.keeper.ChainID()
 	chainConfig := ctx.keeper.GetParams(ctx.context).ChainConfig.EthereumConfig(ethChainID)
-	gasPrice := ctx.keeper.BaseFee(ctx.context, chainConfig)
+	gasPrice := ctx.keeper.GetBaseFee(ctx.context, chainConfig)
 	gasFeeCap := new(big.Int).Add(gasPrice, big.NewInt(int64(ctx.rand.Int())))
 	gasTipCap := big.NewInt(int64(ctx.rand.Int()))
 	nonce := ctx.keeper.GetNonce(ctx.context, *from)

x/evm/types/query.pb.go

@@ -6,6 +6,7 @@ package types
 import (
 	context "context"
 	fmt "fmt"
+	github_com_cosmos_cosmos_sdk_types "github.com/cosmos/cosmos-sdk/types"
 	query "github.com/cosmos/cosmos-sdk/types/query"
 	_ "github.com/gogo/protobuf/gogoproto"
 	grpc1 "github.com/gogo/protobuf/grpc"
@@ -1151,6 +1152,82 @@ func (m *QueryTraceBlockResponse) GetData() []byte {
 	return nil
 }
 
+// QueryBaseFeeRequest defines the request type for querying the EIP1559 base
+// fee.
+type QueryBaseFeeRequest struct {
+}
+
+func (m *QueryBaseFeeRequest) Reset()         { *m = QueryBaseFeeRequest{} }
+func (m *QueryBaseFeeRequest) String() string { return proto.CompactTextString(m) }
+func (*QueryBaseFeeRequest) ProtoMessage()    {}
+func (*QueryBaseFeeRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e15a877459347994, []int{22}
+}
+func (m *QueryBaseFeeRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *QueryBaseFeeRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_QueryBaseFeeRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *QueryBaseFeeRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_QueryBaseFeeRequest.Merge(m, src)
+}
+func (m *QueryBaseFeeRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *QueryBaseFeeRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_QueryBaseFeeRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_QueryBaseFeeRequest proto.InternalMessageInfo
+
+// BaseFeeResponse returns the EIP1559 base fee.
+type QueryBaseFeeResponse struct {
+	BaseFee *github_com_cosmos_cosmos_sdk_types.Int `protobuf:"bytes,1,opt,name=base_fee,json=baseFee,proto3,customtype=github.com/cosmos/cosmos-sdk/types.Int" json:"base_fee,omitempty"`
+}
+
+func (m *QueryBaseFeeResponse) Reset()         { *m = QueryBaseFeeResponse{} }
+func (m *QueryBaseFeeResponse) String() string { return proto.CompactTextString(m) }
+func (*QueryBaseFeeResponse) ProtoMessage()    {}
+func (*QueryBaseFeeResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e15a877459347994, []int{23}
+}
+func (m *QueryBaseFeeResponse) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *QueryBaseFeeResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_QueryBaseFeeResponse.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *QueryBaseFeeResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_QueryBaseFeeResponse.Merge(m, src)
+}
+func (m *QueryBaseFeeResponse) XXX_Size() int {
+	return m.Size()
+}
+func (m *QueryBaseFeeResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_QueryBaseFeeResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_QueryBaseFeeResponse proto.InternalMessageInfo
+
 func init() {
 	proto.RegisterType((*QueryAccountRequest)(nil), "ethermint.evm.v1.QueryAccountRequest")
 	proto.RegisterType((*QueryAccountResponse)(nil), "ethermint.evm.v1.QueryAccountResponse")
@@ -1174,93 +1251,100 @@ func init() {
 	proto.RegisterType((*QueryTraceTxResponse)(nil), "ethermint.evm.v1.QueryTraceTxResponse")
 	proto.RegisterType((*QueryTraceBlockRequest)(nil), "ethermint.evm.v1.QueryTraceBlockRequest")
 	proto.RegisterType((*QueryTraceBlockResponse)(nil), "ethermint.evm.v1.QueryTraceBlockResponse")
+	proto.RegisterType((*QueryBaseFeeRequest)(nil), "ethermint.evm.v1.QueryBaseFeeRequest")
+	proto.RegisterType((*QueryBaseFeeResponse)(nil), "ethermint.evm.v1.QueryBaseFeeResponse")
 }
 
 func init() { proto.RegisterFile("ethermint/evm/v1/query.proto", fileDescriptor_e15a877459347994) }
 
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+	0x53, 0xbd, 0xc2, 0x4f, 0xc9, 0x55, 0x12, 0x14, 0x18, 0xe3, 0xcb, 0x5e, 0x51, 0x57, 0xcb, 0xca,
+	0xc5, 0x2e, 0xa4, 0x79, 0x15, 0x28, 0xdf, 0x26, 0xaa, 0xb0, 0x16, 0x37, 0x7f, 0x7b, 0x9e, 0x5f,
+	0x75, 0xea, 0xac, 0xd6, 0xae, 0x98, 0xb6, 0xd7, 0xb4, 0x54, 0xbf, 0x24, 0x3f, 0x17, 0x69, 0x75,
+	0xdf, 0x62, 0x07, 0x2d, 0x42, 0xcd, 0x8f, 0x5c, 0xc6, 0x15, 0x40, 0xb8, 0x2b, 0xfc, 0x33, 0x07,
+	0x33, 0xc2, 0x3f, 0xfa, 0x4e, 0x83, 0x94, 0x12, 0x3e, 0xb4, 0x12, 0x8d, 0xf6, 0x88, 0xce, 0x46,
+	0x5f, 0x9d, 0x64, 0x26, 0xb9, 0x1a, 0x17, 0xbe, 0xfd, 0xe5, 0xcf, 0x1f, 0xa6, 0x57, 0xd0, 0x39,
+	0x2b, 0xd2, 0x5d, 0x29, 0xf1, 0xb3, 0xee, 0xa9, 0x4a, 0x7f, 0x1f, 0xfd, 0xa4, 0xc1, 0xf1, 0x81,
+	0xfe, 0x02, 0x5d, 0x88, 0x81, 0x19, 0xd5, 0xc7, 0xe8, 0x5b, 0x47, 0x33, 0x56, 0xcc, 0x0a, 0x82,
+	0xd9, 0x16, 0xda, 0x8c, 0x32, 0x0b, 0x5a, 0x99, 0x08, 0xc1, 0x9f, 0x35, 0x98, 0x1f, 0x6e, 0x15,
+	0x90, 0x19, 0x03, 0x1b, 0xd3, 0xa1, 0xe8, 0xd6, 0x91, 0xed, 0x15, 0xd3, 0xcb, 0x82, 0xe9, 0x3b,
+	0xa8, 0x10, 0x65, 0xda, 0x09, 0xce, 0xf4, 0xc9, 0x86, 0xbb, 0x9f, 0xfb, 0xe8, 0x81, 0x06, 0x29,
+	0xd5, 0x14, 0xc4, 0x3e, 0xed, 0x60, 0xbf, 0x11, 0xfb, 0xb4, 0x43, 0xbd, 0x85, 0xb1, 0x25, 0x68,
+	0xad, 0xa2, 0xf3, 0x51, 0x5a, 0xaa, 0xc9, 0xa0, 0xa1, 0xd0, 0x3d, 0xd2, 0x20, 0xa5, 0xda, 0x83,
+	0x58, 0x22, 0x83, 0xbd, 0x48, 0x2c, 0x91, 0xa1, 0x2e, 0xc3, 0xd8, 0x16, 0x44, 0x2e, 0xa0, 0x8d,
+	0x28, 0x11, 0x2a, 0x4d, 0xfb, 0x3c, 0xac, 0x7b, 0xfb, 0xe4, 0xe0, 0x3e, 0xba, 0x0b, 0x49, 0xde,
+	0x45, 0x20, 0x23, 0x36, 0x65, 0x7a, 0xad, 0x89, 0x7e, 0x6e, 0xac, 0x8d, 0xe2, 0xb0, 0x21, 0x38,
+	0x9c, 0x43, 0x67, 0x47, 0x65, 0x53, 0x75, 0x20, 0x12, 0x5f, 0xc1, 0xac, 0x14, 0x52, 0x74, 0x3e,
+	0xc6, 0xf3, 0x80, 0x5e, 0xeb, 0x2b, 0x13, 0xac, 0x14, 0x83, 0x65, 0xc1, 0x40, 0x47, 0xd9, 0x28,
+	0x03, 0xa9, 0xd4, 0xa8, 0x0b, 0x29, 0xa5, 0xd4, 0x68, 0x39, 0xea, 0x73, 0x50, 0xc4, 0xf5, 0xb5,
+	0x49, 0x15, 0x3b, 0xc0, 0x35, 0x04, 0xee, 0x22, 0xd2, 0xa3, 0xb8, 0x84, 0xd5, 0xca, 0x36, 0x87,
+	0xfb, 0x06, 0x32, 0x21, 0x91, 0x3f, 0x02, 0xfa, 0x88, 0x3b, 0x8f, 0xe8, 0x12, 0x8c, 0x55, 0x81,
+	0xbd, 0x8c, 0x72, 0x23, 0xb0, 0x95, 0x79, 0xd9, 0xc1, 0x14, 0x7d, 0x0d, 0x29, 0xa5, 0x66, 0xb1,
+	0xb9, 0x37, 0xd8, 0x55, 0xc4, 0xe6, 0xde, 0x90, 0x28, 0x8e, 0xbb, 0xbd, 0x94, 0x32, 0xd6, 0x45,
+	0x0f, 0x35, 0x80, 0xbe, 0x12, 0xa0, 0xf5, 0x71, 0xae, 0xc3, 0x12, 0xaa, 0x6f, 0x1c, 0xc1, 0x52,
+	0xf1, 0x58, 0x11, 0x3c, 0xf2, 0x68, 0x29, 0x8e, 0x87, 0x10, 0x27, 0x1e, 0x08, 0xa5, 0x26, 0x63,
+	0xaa, 0x41, 0x58, 0x84, 0xc6, 0x54, 0x83, 0x01, 0x51, 0x1a, 0x17, 0x88, 0x40, 0xac, 0x8a, 0xc5,
+	0xa7, 0x2f, 0x72, 0xda, 0xb3, 0x17, 0x39, 0xed, 0x8f, 0x17, 0x39, 0xed, 0xf1, 0x61, 0x6e, 0xea,
+	0xd9, 0x61, 0x6e, 0xea, 0xd7, 0xc3, 0xdc, 0xd4, 0x17, 0xeb, 0x21, 0xf1, 0x62, 0x35, 0xec, 0xd3,
+	0x3a, 0x0d, 0xf9, 0xe9, 0x0a, 0x4f, 0x42, 0xc2, 0x2a, 0xb3, 0x42, 0x83, 0xdf, 0xfe, 0x37, 0x00,
+	0x00, 0xff, 0xff, 0xe3, 0x18, 0xf8, 0xf5, 0x5a, 0x10, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1299,6 +1383,9 @@ type QueryClient interface {
 	TraceTx(ctx context.Context, in *QueryTraceTxRequest, opts ...grpc.CallOption) (*QueryTraceTxResponse, error)
 	// TraceBlock implements the `debug_traceBlockByNumber` and `debug_traceBlockByHash` rpc api
 	TraceBlock(ctx context.Context, in *QueryTraceBlockRequest, opts ...grpc.CallOption) (*QueryTraceBlockResponse, error)
+	// BaseFee queries the base fee of the parent block of the current block,
+	// it's similar to feemarket module's method, but also checks london hardfork status.
+	BaseFee(ctx context.Context, in *QueryBaseFeeRequest, opts ...grpc.CallOption) (*QueryBaseFeeResponse, error)
 }
 
 type queryClient struct {
@@ -1408,6 +1495,15 @@ func (c *queryClient) TraceBlock(ctx context.Context, in *QueryTraceBlockRequest
 	return out, nil
 }
 
+func (c *queryClient) BaseFee(ctx context.Context, in *QueryBaseFeeRequest, opts ...grpc.CallOption) (*QueryBaseFeeResponse, error) {
+	out := new(QueryBaseFeeResponse)
+	err := c.cc.Invoke(ctx, "/ethermint.evm.v1.Query/BaseFee", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // QueryServer is the server API for Query service.
 type QueryServer interface {
 	// Account queries an Ethereum account.
@@ -1434,6 +1530,9 @@ type QueryServer interface {
 	TraceTx(context.Context, *QueryTraceTxRequest) (*QueryTraceTxResponse, error)
 	// TraceBlock implements the `debug_traceBlockByNumber` and `debug_traceBlockByHash` rpc api
 	TraceBlock(context.Context, *QueryTraceBlockRequest) (*QueryTraceBlockResponse, error)
+	// BaseFee queries the base fee of the parent block of the current block,
+	// it's similar to feemarket module's method, but also checks london hardfork status.
+	BaseFee(context.Context, *QueryBaseFeeRequest) (*QueryBaseFeeResponse, error)
 }
 
 // UnimplementedQueryServer can be embedded to have forward compatible implementations.
@@ -1473,6 +1572,9 @@ func (*UnimplementedQueryServer) TraceTx(ctx context.Context, req *QueryTraceTxR
 func (*UnimplementedQueryServer) TraceBlock(ctx context.Context, req *QueryTraceBlockRequest) (*QueryTraceBlockResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method TraceBlock not implemented")
 }
+func (*UnimplementedQueryServer) BaseFee(ctx context.Context, req *QueryBaseFeeRequest) (*QueryBaseFeeResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method BaseFee not implemented")
+}
 
 func RegisterQueryServer(s grpc1.Server, srv QueryServer) {
 	s.RegisterService(&_Query_serviceDesc, srv)
@@ -1676,6 +1778,24 @@ func _Query_TraceBlock_Handler(srv interface{}, ctx context.Context, dec func(in
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Query_BaseFee_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(QueryBaseFeeRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(QueryServer).BaseFee(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/ethermint.evm.v1.Query/BaseFee",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(QueryServer).BaseFee(ctx, req.(*QueryBaseFeeRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _Query_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "ethermint.evm.v1.Query",
 	HandlerType: (*QueryServer)(nil),
@@ -1724,6 +1844,10 @@ var _Query_serviceDesc = grpc.ServiceDesc{
 			MethodName: "TraceBlock",
 			Handler:    _Query_TraceBlock_Handler,
 		},
+		{
+			MethodName: "BaseFee",
+			Handler:    _Query_BaseFee_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "ethermint/evm/v1/query.proto",
@@ -2548,6 +2672,64 @@ func (m *QueryTraceBlockResponse) MarshalToSizedBuffer(dAtA []byte) (int, error)
 	return len(dAtA) - i, nil
 }
 
+func (m *QueryBaseFeeRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *QueryBaseFeeRequest) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *QueryBaseFeeRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	return len(dAtA) - i, nil
+}
+
+func (m *QueryBaseFeeResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *QueryBaseFeeResponse) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *QueryBaseFeeResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.BaseFee != nil {
+		{
+			size := m.BaseFee.Size()
+			i -= size
+			if _, err := m.BaseFee.MarshalTo(dAtA[i:]); err != nil {
+				return 0, err
+			}
+			i = encodeVarintQuery(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
 func encodeVarintQuery(dAtA []byte, offset int, v uint64) int {
 	offset -= sovQuery(v)
 	base := offset
@@ -2908,6 +3090,28 @@ func (m *QueryTraceBlockResponse) Size() (n int) {
 	return n
 }
 
+func (m *QueryBaseFeeRequest) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	return n
+}
+
+func (m *QueryBaseFeeResponse) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.BaseFee != nil {
+		l = m.BaseFee.Size()
+		n += 1 + l + sovQuery(uint64(l))
+	}
+	return n
+}
+
 func sovQuery(x uint64) (n int) {
 	return (math_bits.Len64(x|1) + 6) / 7
 }
@@ -5214,6 +5418,142 @@ func (m *QueryTraceBlockResponse) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *QueryBaseFeeRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowQuery
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: QueryBaseFeeRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: QueryBaseFeeRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		default:
+			iNdEx = preIndex
+			skippy, err := skipQuery(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthQuery
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *QueryBaseFeeResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowQuery
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: QueryBaseFeeResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: QueryBaseFeeResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field BaseFee", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowQuery
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthQuery
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthQuery
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			var v github_com_cosmos_cosmos_sdk_types.Int
+			m.BaseFee = &v
+			if err := m.BaseFee.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipQuery(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthQuery
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipQuery(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0

x/evm/types/query.pb.gw.go

@@ -539,6 +539,24 @@ func local_request_Query_TraceBlock_0(ctx context.Context, marshaler runtime.Mar
 
 }
 
+func request_Query_BaseFee_0(ctx context.Context, marshaler runtime.Marshaler, client QueryClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq QueryBaseFeeRequest
+	var metadata runtime.ServerMetadata
+
+	msg, err := client.BaseFee(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+
+}
+
+func local_request_Query_BaseFee_0(ctx context.Context, marshaler runtime.Marshaler, server QueryServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq QueryBaseFeeRequest
+	var metadata runtime.ServerMetadata
+
+	msg, err := server.BaseFee(ctx, &protoReq)
+	return msg, metadata, err
+
+}
+
 // RegisterQueryHandlerServer registers the http handlers for service Query to "mux".
 // UnaryRPC     :call QueryServer directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
@@ -765,6 +783,26 @@ func RegisterQueryHandlerServer(ctx context.Context, mux *runtime.ServeMux, serv
 
 	})
 
+	mux.Handle("GET", pattern_Query_BaseFee_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		rctx, err := runtime.AnnotateIncomingContext(ctx, mux, req)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_Query_BaseFee_0(rctx, inboundMarshaler, server, req, pathParams)
+		ctx = runtime.NewServerMetadataContext(ctx, md)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_Query_BaseFee_0(ctx, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
 	return nil
 }
 
@@ -1026,6 +1064,26 @@ func RegisterQueryHandlerClient(ctx context.Context, mux *runtime.ServeMux, clie
 
 	})
 
+	mux.Handle("GET", pattern_Query_BaseFee_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		rctx, err := runtime.AnnotateContext(ctx, mux, req)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_Query_BaseFee_0(rctx, inboundMarshaler, client, req, pathParams)
+		ctx = runtime.NewServerMetadataContext(ctx, md)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_Query_BaseFee_0(ctx, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
 	return nil
 }
 
@@ -1051,6 +1109,8 @@ var (
 	pattern_Query_TraceTx_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"ethermint", "evm", "v1", "trace_tx"}, "", runtime.AssumeColonVerbOpt(true)))
 
 	pattern_Query_TraceBlock_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"ethermint", "evm", "v1", "trace_block"}, "", runtime.AssumeColonVerbOpt(true)))
+
+	pattern_Query_BaseFee_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"ethermint", "evm", "v1", "base_fee"}, "", runtime.AssumeColonVerbOpt(true)))
 )
 
 var (
@@ -1075,4 +1135,6 @@ var (
 	forward_Query_TraceTx_0 = runtime.ForwardResponseMessage
 
 	forward_Query_TraceBlock_0 = runtime.ForwardResponseMessage
+
+	forward_Query_BaseFee_0 = runtime.ForwardResponseMessage
 )