11 changed files with 1029 additions and 26 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -40,11 +40,23 @@ Ref: https://keepachangelog.com/en/1.0.0/

 ### Bug Fixes

-* (rpc) [tharsis#990](https://github.com/tharsis/ethermint/pull/990) Calculate reward values from all `MsgEthereumTx` from a block in `eth_feeHistory`.
-* (ante) [tharsis#991](https://github.com/tharsis/ethermint/pull/991) Set an upper bound to gasWanted to prevent DoS attack.
+* (feemarket) [tharsis#1021](https://github.com/tharsis/ethermint/pull/1021) Fix fee market migration.
+
+## [v0.12.1] - 2022-03-29
+
+### Bug Fixes
+
+* (evm) [tharsis#1016](https://github.com/tharsis/ethermint/pull/1016) Update validate basic check for storage state.
+
+## [v0.12.0] - 2022-03-24
+
+### Bug Fixes
+
+* (rpc) [tharsis#1012](https://github.com/tharsis/ethermint/pull/1012) fix the tx hash in filter entries created by `eth_newPendingTransactionFilter`.
 * (rpc) [tharsis#1006](https://github.com/tharsis/ethermint/pull/1006) Use `string` as the parameters type to correct ambiguous results.
-* (ante) [tharsis#1004](https://github.com/tharsis/ethermint/pull/1004) make MaxTxGasWanted configurable.
-* (rpc) [tharsis#1012](https://github.com/tharsis/ethermint/pull/1012) fix the tx hash in filter entries created by `eth_newPendingTransactionFilter`.
+* (ante) [tharsis#1004](https://github.com/tharsis/ethermint/pull/1004) Make `MaxTxGasWanted` configurable.
+* (ante) [tharsis#991](https://github.com/tharsis/ethermint/pull/991) Set an upper bound to gasWanted to prevent DoS attack.
+* (rpc) [tharsis#990](https://github.com/tharsis/ethermint/pull/990) Calculate reward values from all `MsgEthereumTx` from a block in `eth_feeHistory`.

 ## [v0.11.0] - 2022-03-06

@ -58,7 +70,7 @@ Ref: https://keepachangelog.com/en/1.0.0/

 ### Improvements

- (rpc) [tharsis#979](https://github.com/tharsis/ethermint/pull/979) Add configurable timeouts to http server
+- (rpc) [tharsis#979](https://github.com/tharsis/ethermint/pull/979) Add configurable timeouts to http server
 - (rpc) [tharsis#988](https://github.com/tharsis/ethermint/pull/988) json-rpc server always use local rpc client

 ## [v0.10.1] - 2022-03-04
--- a/client/testnet.go
+++ b/client/testnet.go
@ -208,7 +208,6 @@ func initTestnetFiles(
 	genBalIterator banktypes.GenesisBalancesIterator,
 	args initArgs,
 ) error {
-
 	if args.chainID == "" {
 		args.chainID = fmt.Sprintf("ethermint_%d-1", tmrand.Int63n(9999999999999)+1)
 	}
@ -377,7 +376,6 @@ func initGenFiles(
 	genFiles []string,
 	numValidators int,
 ) error {
-
 	appGenState := mbm.DefaultGenesis(clientCtx.Codec)
 	// set the accounts in the genesis state
 	var authGenState authtypes.GenesisState
@ -453,7 +451,6 @@ func collectGenFiles(
 	nodeIDs []string, valPubKeys []cryptotypes.PubKey, numValidators int,
 	outputDir, nodeDirPrefix, nodeDaemonHome string, genBalIterator banktypes.GenesisBalancesIterator,
 ) error {
-
 	var appState json.RawMessage
 	genTime := tmtime.Now()

--- a/rpc/ethereum/backend/feebackend.go
+++ b/rpc/ethereum/backend/feebackend.go
@ -35,7 +35,8 @@ func (e *EVMBackend) processBlock(
 	ethBlock *map[string]interface{},
 	rewardPercentiles []float64,
 	tendermintBlockResult *tmrpctypes.ResultBlockResults,
-	targetOneFeeHistory *rpctypes.OneFeeHistory) error {
+	targetOneFeeHistory *rpctypes.OneFeeHistory,
+) error {
 	blockHeight := tendermintBlock.Block.Height
 	blockBaseFee, err := e.BaseFee(blockHeight)
 	if err != nil {
--- a/tests/importer/chain_ctx.go
+++ b/tests/importer/chain_ctx.go
@ -97,7 +97,8 @@ func (cc *ChainContext) Finalize(
 // consensus rules that happen at finalization (e.g. block rewards).
 // TODO: Figure out if this needs to be hooked up to any part of the ABCI?
 func (cc *ChainContext) FinalizeAndAssemble(_ ethcons.ChainHeaderReader, _ *ethtypes.Header, _ *ethstate.StateDB, _ []*ethtypes.Transaction,
-	_ []*ethtypes.Header, _ []*ethtypes.Receipt) (*ethtypes.Block, error) {
+	_ []*ethtypes.Header, _ []*ethtypes.Receipt,
+) (*ethtypes.Block, error) {
 	return nil, nil
 }

--- a/x/feemarket/keeper/migrations.go
+++ b/x/feemarket/keeper/migrations.go
@ -1,13 +1,10 @@
 package keeper

 import (
-	"math/big"
-
 	sdk "github.com/cosmos/cosmos-sdk/types"
-)

-// KeyPrefixBaseFeeV1 is the base fee key prefix used in version 1
-var KeyPrefixBaseFeeV1 = []byte{2}
+	v010 "github.com/tharsis/ethermint/x/feemarket/migrations/v010"
+)

 // Migrator is a struct for handling in-place store migrations.
 type Migrator struct {
@ -21,13 +18,7 @@ func NewMigrator(keeper Keeper) Migrator {
 	}
 }

+// Migrate1to2 migrates the store from consensus version v1 to v2
 func (m Migrator) Migrate1to2(ctx sdk.Context) error {
-	store := ctx.KVStore(m.keeper.storeKey)
-	bz := store.Get(KeyPrefixBaseFeeV1)
-	if len(bz) > 0 {
-		baseFee := new(big.Int).SetBytes(bz)
-		m.keeper.SetBaseFee(ctx, baseFee)
-	}
-	store.Delete(KeyPrefixBaseFeeV1)
-	return nil
+	return v010.MigrateStore(ctx, &m.keeper.paramSpace, m.keeper.storeKey)
 }
--- a/x/feemarket/keeper/migrations_test.go
+++ b/x/feemarket/keeper/migrations_test.go
@ -4,6 +4,7 @@ import (
 	"math/big"

 	"github.com/tharsis/ethermint/x/feemarket/keeper"
+	v010 "github.com/tharsis/ethermint/x/feemarket/migrations/v010"
 )

 func (suite *KeeperTestSuite) TestMigration1To2() {
@ -11,8 +12,9 @@ func (suite *KeeperTestSuite) TestMigration1To2() {
 	storeKey := suite.app.GetKey("feemarket")
 	store := suite.ctx.KVStore(storeKey)
 	baseFee := big.NewInt(1000)
-	store.Set(keeper.KeyPrefixBaseFeeV1, baseFee.Bytes())
+	store.Set(v010.KeyPrefixBaseFeeV1, baseFee.Bytes())
 	m := keeper.NewMigrator(suite.app.FeeMarketKeeper)
-	suite.Require().NoError(m.Migrate1to2(suite.ctx))
+	err := m.Migrate1to2(suite.ctx)
+	suite.Require().NoError(err)
 	suite.Require().Equal(baseFee, suite.app.FeeMarketKeeper.GetBaseFee(suite.ctx))
 }
--- a/x/feemarket/migrations/v010/migrate.go
+++ b/x/feemarket/migrations/v010/migrate.go
@ -0,0 +1,74 @@
+package v010
+
+import (
+	"math/big"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
+	v09types "github.com/tharsis/ethermint/x/feemarket/migrations/v09/types"
+	"github.com/tharsis/ethermint/x/feemarket/types"
+)
+
+// KeyPrefixBaseFeeV1 is the base fee key prefix used in version 1
+var KeyPrefixBaseFeeV1 = []byte{2}
+
+// MigrateStore migrates the BaseFee value from the store to the params for
+// In-Place Store migration logic.
+func MigrateStore(ctx sdk.Context, paramstore *paramtypes.Subspace, storeKey sdk.StoreKey) error {
+	baseFee := types.DefaultParams().BaseFee
+
+	store := ctx.KVStore(storeKey)
+
+	if !paramstore.HasKeyTable() {
+		ps := paramstore.WithKeyTable(types.ParamKeyTable())
+		paramstore = &ps
+	}
+
+	switch {
+	case store.Has(KeyPrefixBaseFeeV1):
+		bz := store.Get(KeyPrefixBaseFeeV1)
+		baseFee = sdk.NewIntFromBigInt(new(big.Int).SetBytes(bz))
+	case paramstore.Has(ctx, types.ParamStoreKeyNoBaseFee):
+		paramstore.GetIfExists(ctx, types.ParamStoreKeyBaseFee, &baseFee)
+	}
+
+	var (
+		noBaseFee                                bool
+		baseFeeChangeDenom, elasticityMultiplier uint32
+		enableHeight                             int64
+	)
+
+	paramstore.GetIfExists(ctx, types.ParamStoreKeyNoBaseFee, &noBaseFee)
+	paramstore.GetIfExists(ctx, types.ParamStoreKeyBaseFeeChangeDenominator, &baseFeeChangeDenom)
+	paramstore.GetIfExists(ctx, types.ParamStoreKeyElasticityMultiplier, &elasticityMultiplier)
+	paramstore.GetIfExists(ctx, types.ParamStoreKeyEnableHeight, &enableHeight)
+
+	params := types.Params{
+		NoBaseFee:                noBaseFee,
+		BaseFeeChangeDenominator: baseFeeChangeDenom,
+		ElasticityMultiplier:     elasticityMultiplier,
+		BaseFee:                  baseFee,
+		EnableHeight:             enableHeight,
+	}
+
+	paramstore.SetParamSet(ctx, &params)
+	store.Delete(KeyPrefixBaseFeeV1)
+	return nil
+}
+
+// MigrateJSON accepts exported v0.9 x/feemarket genesis state and migrates it to
+// v0.10 x/feemarket genesis state. The migration includes:
+// - Migrate BaseFee to Params
+func MigrateJSON(oldState v09types.GenesisState) types.GenesisState {
+	return types.GenesisState{
+		Params: types.Params{
+			NoBaseFee:                oldState.Params.NoBaseFee,
+			BaseFeeChangeDenominator: oldState.Params.BaseFeeChangeDenominator,
+			ElasticityMultiplier:     oldState.Params.ElasticityMultiplier,
+			EnableHeight:             oldState.Params.EnableHeight,
+			BaseFee:                  oldState.BaseFee,
+		},
+		BlockGas: oldState.BlockGas,
+	}
+}
--- a/x/feemarket/migrations/v010/migrate_test.go
+++ b/x/feemarket/migrations/v010/migrate_test.go
@ -0,0 +1,46 @@
+package v010_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/cosmos/cosmos-sdk/testutil"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
+
+	"github.com/tharsis/ethermint/encoding"
+
+	"github.com/tharsis/ethermint/app"
+	feemarketkeeper "github.com/tharsis/ethermint/x/feemarket/keeper"
+	v010 "github.com/tharsis/ethermint/x/feemarket/migrations/v010"
+	"github.com/tharsis/ethermint/x/feemarket/types"
+	feemarkettypes "github.com/tharsis/ethermint/x/feemarket/types"
+)
+
+func TestMigrateStore(t *testing.T) {
+	encCfg := encoding.MakeConfig(app.ModuleBasics)
+	feemarketKey := sdk.NewKVStoreKey(feemarkettypes.StoreKey)
+	tFeeMarketKey := sdk.NewTransientStoreKey(fmt.Sprintf("%s_test", feemarkettypes.StoreKey))
+	ctx := testutil.DefaultContext(feemarketKey, tFeeMarketKey)
+	paramstore := paramtypes.NewSubspace(
+		encCfg.Marshaler, encCfg.Amino, feemarketKey, tFeeMarketKey, "feemarket",
+	)
+	fmKeeper := feemarketkeeper.NewKeeper(encCfg.Marshaler, feemarketKey, paramstore)
+	fmKeeper.SetParams(ctx, types.DefaultParams())
+	require.True(t, paramstore.HasKeyTable())
+
+	// check that the fee market is not nil
+	err := v010.MigrateStore(ctx, &paramstore, feemarketKey)
+	require.NoError(t, err)
+	require.False(t, ctx.KVStore(feemarketKey).Has(v010.KeyPrefixBaseFeeV1))
+
+	params := fmKeeper.GetParams(ctx)
+	require.False(t, params.BaseFee.IsNil())
+
+	baseFee := fmKeeper.GetBaseFee(ctx)
+	require.NotNil(t, baseFee)
+
+	require.Equal(t, baseFee.Int64(), params.BaseFee.Int64())
+}
--- a/x/feemarket/migrations/v09/types/feemarket.pb
+++ b/x/feemarket/migrations/v09/types/feemarket.pb
@ -0,0 +1,462 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: ethermint/feemarket/v1/feemarket.proto
+
+package types
+
+import (
+	fmt "fmt"
+	proto "github.com/gogo/protobuf/proto"
+	io "io"
+	math "math"
+	math_bits "math/bits"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
+
+// Params defines the EVM module parameters
+type Params struct {
+	// no base fee forces the EIP-1559 base fee to 0 (needed for 0 price calls)
+	NoBaseFee bool `protobuf:"varint,1,opt,name=no_base_fee,json=noBaseFee,proto3" json:"no_base_fee,omitempty"`
+	// base fee change denominator bounds the amount the base fee can change
+	// between blocks.
+	BaseFeeChangeDenominator uint32 `protobuf:"varint,2,opt,name=base_fee_change_denominator,json=baseFeeChangeDenominator,proto3" json:"base_fee_change_denominator,omitempty"`
+	// elasticity multiplier bounds the maximum gas limit an EIP-1559 block may
+	// have.
+	ElasticityMultiplier uint32 `protobuf:"varint,3,opt,name=elasticity_multiplier,json=elasticityMultiplier,proto3" json:"elasticity_multiplier,omitempty"`
+	// initial base fee for EIP-1559 blocks.
+	InitialBaseFee int64 `protobuf:"varint,4,opt,name=initial_base_fee,json=initialBaseFee,proto3" json:"initial_base_fee,omitempty"`
+	// height at which the base fee calculation is enabled.
+	EnableHeight int64 `protobuf:"varint,5,opt,name=enable_height,json=enableHeight,proto3" json:"enable_height,omitempty"`
+}
+
+func (m *Params) Reset()         { *m = Params{} }
+func (m *Params) String() string { return proto.CompactTextString(m) }
+func (*Params) ProtoMessage()    {}
+func (*Params) Descriptor() ([]byte, []int) {
+	return fileDescriptor_4feb8b20cf98e6e1, []int{0}
+}
+func (m *Params) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *Params) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_Params.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 *Params) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Params.Merge(m, src)
+}
+func (m *Params) XXX_Size() int {
+	return m.Size()
+}
+func (m *Params) XXX_DiscardUnknown() {
+	xxx_messageInfo_Params.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Params proto.InternalMessageInfo
+
+func (m *Params) GetNoBaseFee() bool {
+	if m != nil {
+		return m.NoBaseFee
+	}
+	return false
+}
+
+func (m *Params) GetBaseFeeChangeDenominator() uint32 {
+	if m != nil {
+		return m.BaseFeeChangeDenominator
+	}
+	return 0
+}
+
+func (m *Params) GetElasticityMultiplier() uint32 {
+	if m != nil {
+		return m.ElasticityMultiplier
+	}
+	return 0
+}
+
+func (m *Params) GetInitialBaseFee() int64 {
+	if m != nil {
+		return m.InitialBaseFee
+	}
+	return 0
+}
+
+func (m *Params) GetEnableHeight() int64 {
+	if m != nil {
+		return m.EnableHeight
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*Params)(nil), "ethermint.feemarket.v1.Params")
+}
+
+func init() {
+	proto.RegisterFile("ethermint/feemarket/v1/feemarket.proto", fileDescriptor_4feb8b20cf98e6e1)
+}
+
+var fileDescriptor_4feb8b20cf98e6e1 = []byte{
+	// 286 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x4c, 0x90, 0xc1, 0x4a, 0x03, 0x31,
+	0x10, 0x86, 0x1b, 0xab, 0x45, 0xa3, 0x15, 0x59, 0x54, 0x16, 0x84, 0x50, 0x14, 0x64, 0x4f, 0xbb,
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+	0x4a, 0x32, 0x2d, 0xf6, 0x2d, 0x7c, 0x2c, 0x8f, 0x3d, 0x7a, 0x94, 0xf6, 0xe8, 0x4b, 0x08, 0x5b,
+	0xdb, 0x78, 0x9c, 0xff, 0xfb, 0x06, 0x7e, 0x7e, 0x7e, 0x0b, 0xa4, 0xc1, 0x1b, 0xb4, 0x54, 0x8c,
+	0x01, 0x8c, 0xf2, 0x6f, 0x40, 0xc5, 0xbc, 0x1b, 0x8f, 0x7c, 0xea, 0x1d, 0xb9, 0xe4, 0x72, 0xe7,
+	0xe5, 0x11, 0xcd, 0xbb, 0xd7, 0x3f, 0x8c, 0xb7, 0x9e, 0x95, 0x57, 0x26, 0x24, 0x82, 0x1f, 0x5b,
+	0x27, 0x4b, 0x15, 0x40, 0x8e, 0x01, 0x52, 0xd6, 0x61, 0xd9, 0xe1, 0xf0, 0xc8, 0xba, 0xbe, 0x0a,
+	0xf0, 0x08, 0x90, 0xdc, 0xf1, 0xab, 0x2d, 0x94, 0x23, 0xad, 0xec, 0x04, 0xe4, 0x2b, 0x58, 0x67,
+	0xd0, 0x2a, 0x72, 0x3e, 0xdd, 0xeb, 0xb0, 0xac, 0x3d, 0x4c, 0xcb, 0x8d, 0x7d, 0x5f, 0x0b, 0x0f,
+	0x91, 0x27, 0x3d, 0x7e, 0x01, 0x95, 0x0a, 0x84, 0x23, 0xa4, 0x85, 0x34, 0xb3, 0x8a, 0x70, 0x5a,
+	0x21, 0xf8, 0xb4, 0x59, 0x3f, 0x9e, 0x47, 0xf8, 0xb4, 0x63, 0x49, 0xc6, 0xcf, 0xd0, 0x22, 0xa1,
+	0xaa, 0x62, 0xb1, 0xfd, 0x0e, 0xcb, 0x9a, 0xc3, 0xd3, 0xbf, 0x7c, 0xdb, 0xee, 0x86, 0xb7, 0xc1,
+	0xaa, 0xb2, 0x02, 0xa9, 0x01, 0x27, 0x9a, 0xd2, 0x83, 0x5a, 0x3b, 0xd9, 0x84, 0x83, 0x3a, 0xeb,
+	0x0f, 0x3e, 0x57, 0x82, 0x2d, 0x57, 0x82, 0x7d, 0xaf, 0x04, 0xfb, 0x58, 0x8b, 0xc6, 0x72, 0x2d,
+	0x1a, 0x5f, 0x6b, 0xd1, 0x78, 0xc9, 0x27, 0x48, 0x7a, 0x56, 0xe6, 0x23, 0x67, 0x0a, 0xd2, 0xca,
+	0x07, 0x0c, 0x45, 0x9c, 0xf6, 0xfd, 0xdf, 0xb8, 0xb4, 0x98, 0x42, 0x28, 0x5b, 0xf5, 0xac, 0xbd,
+	0xdf, 0x00, 0x00, 0x00, 0xff, 0xff, 0x56, 0x3a, 0xd4, 0xaa, 0x80, 0x01, 0x00, 0x00,
+}
+
+func (m *Params) 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 *Params) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *Params) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.EnableHeight != 0 {
+		i = encodeVarintFeemarket(dAtA, i, uint64(m.EnableHeight))
+		i--
+		dAtA[i] = 0x28
+	}
+	if m.InitialBaseFee != 0 {
+		i = encodeVarintFeemarket(dAtA, i, uint64(m.InitialBaseFee))
+		i--
+		dAtA[i] = 0x20
+	}
+	if m.ElasticityMultiplier != 0 {
+		i = encodeVarintFeemarket(dAtA, i, uint64(m.ElasticityMultiplier))
+		i--
+		dAtA[i] = 0x18
+	}
+	if m.BaseFeeChangeDenominator != 0 {
+		i = encodeVarintFeemarket(dAtA, i, uint64(m.BaseFeeChangeDenominator))
+		i--
+		dAtA[i] = 0x10
+	}
+	if m.NoBaseFee {
+		i--
+		if m.NoBaseFee {
+			dAtA[i] = 1
+		} else {
+			dAtA[i] = 0
+		}
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
+func encodeVarintFeemarket(dAtA []byte, offset int, v uint64) int {
+	offset -= sovFeemarket(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+func (m *Params) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.NoBaseFee {
+		n += 2
+	}
+	if m.BaseFeeChangeDenominator != 0 {
+		n += 1 + sovFeemarket(uint64(m.BaseFeeChangeDenominator))
+	}
+	if m.ElasticityMultiplier != 0 {
+		n += 1 + sovFeemarket(uint64(m.ElasticityMultiplier))
+	}
+	if m.InitialBaseFee != 0 {
+		n += 1 + sovFeemarket(uint64(m.InitialBaseFee))
+	}
+	if m.EnableHeight != 0 {
+		n += 1 + sovFeemarket(uint64(m.EnableHeight))
+	}
+	return n
+}
+
+func sovFeemarket(x uint64) (n int) {
+	return (math_bits.Len64(x|1) + 6) / 7
+}
+func sozFeemarket(x uint64) (n int) {
+	return sovFeemarket(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *Params) 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 ErrIntOverflowFeemarket
+			}
+			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: Params: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: Params: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field NoBaseFee", wireType)
+			}
+			var v int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFeemarket
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.NoBaseFee = bool(v != 0)
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field BaseFeeChangeDenominator", wireType)
+			}
+			m.BaseFeeChangeDenominator = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFeemarket
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.BaseFeeChangeDenominator |= uint32(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ElasticityMultiplier", wireType)
+			}
+			m.ElasticityMultiplier = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFeemarket
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.ElasticityMultiplier |= uint32(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 4:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field InitialBaseFee", wireType)
+			}
+			m.InitialBaseFee = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFeemarket
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.InitialBaseFee |= int64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 5:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field EnableHeight", wireType)
+			}
+			m.EnableHeight = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFeemarket
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.EnableHeight |= int64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipFeemarket(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthFeemarket
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipFeemarket(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowFeemarket
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowFeemarket
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowFeemarket
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLengthFeemarket
+			}
+			iNdEx += length
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroupFeemarket
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if iNdEx < 0 {
+			return 0, ErrInvalidLengthFeemarket
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
+
+var (
+	ErrInvalidLengthFeemarket        = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowFeemarket          = fmt.Errorf("proto: integer overflow")
+	ErrUnexpectedEndOfGroupFeemarket = fmt.Errorf("proto: unexpected end of group")
+)
--- a/x/feemarket/migrations/v09/types/genesis.pb
+++ b/x/feemarket/migrations/v09/types/genesis.pb
@ -0,0 +1,416 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: ethermint/feemarket/v1/genesis.proto
+
+package types
+
+import (
+	fmt "fmt"
+	github_com_cosmos_cosmos_sdk_types "github.com/cosmos/cosmos-sdk/types"
+	_ "github.com/gogo/protobuf/gogoproto"
+	proto "github.com/gogo/protobuf/proto"
+	io "io"
+	math "math"
+	math_bits "math/bits"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
+
+// GenesisState defines the feemarket module's genesis state.
+type GenesisState struct {
+	// params defines all the paramaters of the module.
+	Params Params `protobuf:"bytes,1,opt,name=params,proto3" json:"params"`
+	// base fee is the exported value from previous software version.
+	// Zero by default.
+	BaseFee github_com_cosmos_cosmos_sdk_types.Int `protobuf:"bytes,2,opt,name=base_fee,json=baseFee,proto3,customtype=github.com/cosmos/cosmos-sdk/types.Int" json:"base_fee"`
+	// block gas is the amount of gas used on the last block before the upgrade.
+	// Zero by default.
+	BlockGas uint64 `protobuf:"varint,3,opt,name=block_gas,json=blockGas,proto3" json:"block_gas,omitempty"`
+}
+
+func (m *GenesisState) Reset()         { *m = GenesisState{} }
+func (m *GenesisState) String() string { return proto.CompactTextString(m) }
+func (*GenesisState) ProtoMessage()    {}
+func (*GenesisState) Descriptor() ([]byte, []int) {
+	return fileDescriptor_6241c21661288629, []int{0}
+}
+func (m *GenesisState) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *GenesisState) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_GenesisState.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 *GenesisState) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GenesisState.Merge(m, src)
+}
+func (m *GenesisState) XXX_Size() int {
+	return m.Size()
+}
+func (m *GenesisState) XXX_DiscardUnknown() {
+	xxx_messageInfo_GenesisState.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GenesisState proto.InternalMessageInfo
+
+func (m *GenesisState) GetParams() Params {
+	if m != nil {
+		return m.Params
+	}
+	return Params{}
+}
+
+func (m *GenesisState) GetBlockGas() uint64 {
+	if m != nil {
+		return m.BlockGas
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*GenesisState)(nil), "ethermint.feemarket.v1.GenesisState")
+}
+
+func init() {
+	proto.RegisterFile("ethermint/feemarket/v1/genesis.proto", fileDescriptor_6241c21661288629)
+}
+
+var fileDescriptor_6241c21661288629 = []byte{
+	// 286 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x74, 0x90, 0x31, 0x4b, 0xc3, 0x40,
+	0x14, 0xc7, 0x73, 0x5a, 0x6a, 0x1b, 0x9d, 0x82, 0x48, 0xa9, 0x70, 0x0d, 0x22, 0x25, 0x8b, 0x77,
+	0x54, 0x57, 0xa7, 0x0c, 0xd6, 0x6e, 0x12, 0x37, 0x97, 0x72, 0x89, 0xaf, 0x49, 0x88, 0xc9, 0x85,
+	0x7b, 0x67, 0xd1, 0x6f, 0xe1, 0x87, 0xf1, 0x43, 0x74, 0xec, 0x28, 0x0e, 0x45, 0x92, 0x2f, 0x22,
+	0xb9, 0x96, 0xb6, 0x83, 0x4e, 0x77, 0xbc, 0xf7, 0xfb, 0xbf, 0x1f, 0xfc, 0xed, 0x4b, 0xd0, 0x09,
+	0xa8, 0x3c, 0x2d, 0x34, 0x9f, 0x01, 0xe4, 0x42, 0x65, 0xa0, 0xf9, 0x7c, 0xc4, 0x63, 0x28, 0x00,
+	0x53, 0x64, 0xa5, 0x92, 0x5a, 0x3a, 0x67, 0x5b, 0x8a, 0x6d, 0x29, 0x36, 0x1f, 0xf5, 0x4f, 0x63,
+	0x19, 0x4b, 0x83, 0xf0, 0xe6, 0xb7, 0xa6, 0xfb, 0xc3, 0x7f, 0x6e, 0xee, 0xa2, 0x86, 0xbb, 0xf8,
+	0x24, 0xf6, 0xc9, 0x78, 0xed, 0x79, 0xd4, 0x42, 0x83, 0x73, 0x6b, 0xb7, 0x4b, 0xa1, 0x44, 0x8e,
+	0x3d, 0xe2, 0x12, 0xef, 0xf8, 0x9a, 0xb2, 0xbf, 0xbd, 0xec, 0xc1, 0x50, 0x7e, 0x6b, 0xb1, 0x1a,
+	0x58, 0xc1, 0x26, 0xe3, 0x4c, 0xec, 0x4e, 0x28, 0x10, 0xa6, 0x33, 0x80, 0xde, 0x81, 0x4b, 0xbc,
+	0xae, 0xcf, 0x9a, 0xfd, 0xf7, 0x6a, 0x30, 0x8c, 0x53, 0x9d, 0xbc, 0x86, 0x2c, 0x92, 0x39, 0x8f,
+	0x24, 0xe6, 0x12, 0x37, 0xcf, 0x15, 0x3e, 0x67, 0x5c, 0xbf, 0x97, 0x80, 0x6c, 0x52, 0xe8, 0xe0,
+	0xa8, 0xc9, 0xdf, 0x01, 0x38, 0xe7, 0x76, 0x37, 0x7c, 0x91, 0x51, 0x36, 0x8d, 0x05, 0xf6, 0x0e,
+	0x5d, 0xe2, 0xb5, 0x82, 0x8e, 0x19, 0x8c, 0x05, 0xfa, 0xf7, 0x8b, 0x8a, 0x92, 0x65, 0x45, 0xc9,
+	0x4f, 0x45, 0xc9, 0x47, 0x4d, 0xad, 0x65, 0x4d, 0xad, 0xaf, 0x9a, 0x5a, 0x4f, 0x6c, 0xcf, 0xa3,
+	0x13, 0xa1, 0x30, 0x45, 0xbe, 0xeb, 0xe2, 0x6d, 0xaf, 0x0d, 0xe3, 0x0c, 0xdb, 0xa6, 0x87, 0x9b,
+	0xdf, 0x00, 0x00, 0x00, 0xff, 0xff, 0x41, 0xbf, 0x7e, 0x16, 0x85, 0x01, 0x00, 0x00,
+}
+
+func (m *GenesisState) 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 *GenesisState) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *GenesisState) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.BlockGas != 0 {
+		i = encodeVarintGenesis(dAtA, i, uint64(m.BlockGas))
+		i--
+		dAtA[i] = 0x18
+	}
+	{
+		size := m.BaseFee.Size()
+		i -= size
+		if _, err := m.BaseFee.MarshalTo(dAtA[i:]); err != nil {
+			return 0, err
+		}
+		i = encodeVarintGenesis(dAtA, i, uint64(size))
+	}
+	i--
+	dAtA[i] = 0x12
+	{
+		size, err := m.Params.MarshalToSizedBuffer(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = encodeVarintGenesis(dAtA, i, uint64(size))
+	}
+	i--
+	dAtA[i] = 0xa
+	return len(dAtA) - i, nil
+}
+
+func encodeVarintGenesis(dAtA []byte, offset int, v uint64) int {
+	offset -= sovGenesis(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+func (m *GenesisState) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = m.Params.Size()
+	n += 1 + l + sovGenesis(uint64(l))
+	l = m.BaseFee.Size()
+	n += 1 + l + sovGenesis(uint64(l))
+	if m.BlockGas != 0 {
+		n += 1 + sovGenesis(uint64(m.BlockGas))
+	}
+	return n
+}
+
+func sovGenesis(x uint64) (n int) {
+	return (math_bits.Len64(x|1) + 6) / 7
+}
+func sozGenesis(x uint64) (n int) {
+	return sovGenesis(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *GenesisState) 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 ErrIntOverflowGenesis
+			}
+			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: GenesisState: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: GenesisState: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Params", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowGenesis
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthGenesis
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthGenesis
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if err := m.Params.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 2:
+			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 ErrIntOverflowGenesis
+				}
+				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 ErrInvalidLengthGenesis
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthGenesis
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if err := m.BaseFee.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field BlockGas", wireType)
+			}
+			m.BlockGas = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowGenesis
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.BlockGas |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipGenesis(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthGenesis
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipGenesis(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowGenesis
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowGenesis
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowGenesis
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLengthGenesis
+			}
+			iNdEx += length
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroupGenesis
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if iNdEx < 0 {
+			return 0, ErrInvalidLengthGenesis
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
+
+var (
+	ErrInvalidLengthGenesis        = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowGenesis          = fmt.Errorf("proto: integer overflow")
+	ErrUnexpectedEndOfGroupGenesis = fmt.Errorf("proto: unexpected end of group")
+)
--- a/x/feemarket/types/keys.go
+++ b/x/feemarket/types/keys.go
@ -14,7 +14,8 @@ const (

 // prefix bytes for the feemarket persistent store
 const (
-	prefixBlockGasUsed = iota + 1
+	prefixBlockGasUsed      = iota + 1
+	deprecatedPrefixBaseFee // nolint
 )

 // KVStore key prefixes