4 changed files with 202 additions and 0 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -44,6 +44,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (deps) [#1167](https://github.com/evmos/ethermint/pull/1167) Bump ibc-go to [`v4.0.0-rc2`](https://github.com/cosmos/ibc-go/releases/tag/v4.0.0-rc2)
 * (deps) [#1168](https://github.com/evmos/ethermint/pull/1168) Upgrade Cosmos SDK to `v0.46`.
 * (feemarket) [#1194](https://github.com/evmos/ethermint/pull/1194) Apply feemarket to native cosmos tx.
+* (eth) [#1346](https://github.com/evmos/ethermint/pull/1346) Added support for `sdk.Dec` and `ed25519` type on eip712.

 ### API Breaking

--- a/app/ante/ante_test.go
+++ b/app/ante/ante_test.go
@ -4,11 +4,13 @@ import (
 	"errors"
 	"math/big"
 	"strings"
+	"time"

 	sdkmath "cosmossdk.io/math"

 	"github.com/cosmos/cosmos-sdk/types/tx/signing"
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
+	"github.com/cosmos/cosmos-sdk/x/authz"

 	sdk "github.com/cosmos/cosmos-sdk/types"

@ -16,6 +18,8 @@ import (
 	ethparams "github.com/ethereum/go-ethereum/params"
 	"github.com/evmos/ethermint/tests"
 	evmtypes "github.com/evmos/ethermint/x/evm/types"
+
+	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
 )

 func (suite AnteTestSuite) TestAnteHandler() {
@ -322,6 +326,81 @@ func (suite AnteTestSuite) TestAnteHandler() {
 				return txBuilder.GetTx()
 			}, false, false, true,
 		},
+		{
+			"success- DeliverTx EIP712 create validator",
+			func() sdk.Tx {
+				from := acc.GetAddress()
+				coinAmount := sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewInt(20))
+				amount := sdk.NewCoins(coinAmount)
+				gas := uint64(200000)
+				txBuilder := suite.CreateTestEIP712MsgCreateValidator(from, privKey, "ethermint_9000-1", gas, amount)
+				return txBuilder.GetTx()
+			}, false, false, true,
+		},
+		{
+			"success- DeliverTx EIP712 MsgSubmitProposal",
+			func() sdk.Tx {
+				from := acc.GetAddress()
+				coinAmount := sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewInt(20))
+				gasAmount := sdk.NewCoins(coinAmount)
+				gas := uint64(200000)
+				//reusing the gasAmount for deposit
+				deposit := sdk.NewCoins(coinAmount)
+				txBuilder := suite.CreateTestEIP712SubmitProposal(from, privKey, "ethermint_9000-1", gas, gasAmount, deposit)
+				return txBuilder.GetTx()
+			}, false, false, true,
+		},
+		{
+			"success- DeliverTx EIP712 MsgGrant",
+			func() sdk.Tx {
+				from := acc.GetAddress()
+				grantee := sdk.AccAddress("_______grantee______")
+				coinAmount := sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewInt(20))
+				gasAmount := sdk.NewCoins(coinAmount)
+				gas := uint64(200000)
+				blockTime := time.Date(1, 1, 1, 1, 1, 1, 1, time.UTC)
+				expiresAt := blockTime.Add(time.Hour)
+				msg, err := authz.NewMsgGrant(
+					from, grantee, &banktypes.SendAuthorization{SpendLimit: gasAmount}, &expiresAt,
+				)
+				suite.Require().NoError(err)
+				return suite.CreateTestEIP712CosmosTxBuilder(from, privKey, "ethermint_9000-1", gas, gasAmount, msg).GetTx()
+			}, false, false, true,
+		},
+
+		{
+			"success- DeliverTx EIP712 MsgGrantAllowance",
+			func() sdk.Tx {
+				from := acc.GetAddress()
+				coinAmount := sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewInt(20))
+				gasAmount := sdk.NewCoins(coinAmount)
+				gas := uint64(200000)
+				txBuilder := suite.CreateTestEIP712GrantAllowance(from, privKey, "ethermint_9000-1", gas, gasAmount)
+				return txBuilder.GetTx()
+			}, false, false, true,
+		},
+		{
+			"success- DeliverTx EIP712 edit validator",
+			func() sdk.Tx {
+				from := acc.GetAddress()
+				coinAmount := sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewInt(20))
+				amount := sdk.NewCoins(coinAmount)
+				gas := uint64(200000)
+				txBuilder := suite.CreateTestEIP712MsgEditValidator(from, privKey, "ethermint_9000-1", gas, amount)
+				return txBuilder.GetTx()
+			}, false, false, true,
+		},
+		{
+			"success- DeliverTx EIP712 submit evidence",
+			func() sdk.Tx {
+				from := acc.GetAddress()
+				coinAmount := sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewInt(20))
+				amount := sdk.NewCoins(coinAmount)
+				gas := uint64(200000)
+				txBuilder := suite.CreateTestEIP712MsgEditValidator(from, privKey, "ethermint_9000-1", gas, amount)
+				return txBuilder.GetTx()
+			}, false, false, true,
+		},
 		{
 			"fails - DeliverTx EIP712 signed Cosmos Tx with wrong Chain ID",
 			func() sdk.Tx {
--- a/app/ante/utils_test.go
+++ b/app/ante/utils_test.go
@ -1,6 +1,8 @@
 package ante_test

 import (
+	"encoding/json"
+	"fmt"
 	"math"
 	"math/big"
 	"testing"
@ -27,11 +29,17 @@ import (
 	"github.com/cosmos/cosmos-sdk/simapp"
 	"github.com/cosmos/cosmos-sdk/testutil/testdata"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	txtypes "github.com/cosmos/cosmos-sdk/types/tx"
 	"github.com/cosmos/cosmos-sdk/types/tx/signing"
 	authsigning "github.com/cosmos/cosmos-sdk/x/auth/signing"
 	authtx "github.com/cosmos/cosmos-sdk/x/auth/tx"
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
+	cryptocodec "github.com/evmos/ethermint/crypto/codec"

+	"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
+	evtypes "github.com/cosmos/cosmos-sdk/x/evidence/types"
+	"github.com/cosmos/cosmos-sdk/x/feegrant"
+	types5 "github.com/cosmos/cosmos-sdk/x/gov/types/v1beta1"
 	"github.com/evmos/ethermint/app"
 	ante "github.com/evmos/ethermint/app/ante"
 	"github.com/evmos/ethermint/encoding"
@ -267,6 +275,107 @@ func (suite *AnteTestSuite) CreateTestEIP712TxBuilderMsgDelegate(from sdk.AccAdd
 	return suite.CreateTestEIP712CosmosTxBuilder(from, priv, chainId, gas, gasAmount, msgSend)
 }

+func (suite *AnteTestSuite) CreateTestEIP712MsgCreateValidator(from sdk.AccAddress, priv cryptotypes.PrivKey, chainId string, gas uint64, gasAmount sdk.Coins) client.TxBuilder {
+	// Build MsgCreateValidator
+	valAddr := sdk.ValAddress(from.Bytes())
+	privEd := ed25519.GenPrivKey()
+	msgCreate, err := types3.NewMsgCreateValidator(
+		valAddr,
+		privEd.PubKey(),
+		sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewInt(20)),
+		// TODO: can this values be empty strings?
+		types3.NewDescription("moniker", "indentity", "website", "security_contract", "details"),
+		types3.NewCommissionRates(sdk.OneDec(), sdk.OneDec(), sdk.OneDec()),
+		sdk.OneInt(),
+	)
+	suite.Require().NoError(err)
+	return suite.CreateTestEIP712CosmosTxBuilder(from, priv, chainId, gas, gasAmount, msgCreate)
+}
+
+func (suite *AnteTestSuite) CreateTestEIP712SubmitProposal(from sdk.AccAddress, priv cryptotypes.PrivKey, chainId string, gas uint64, gasAmount sdk.Coins, deposit sdk.Coins) client.TxBuilder {
+	proposal, ok := types5.ContentFromProposalType("My proposal", "My description", types5.ProposalTypeText)
+	suite.Require().True(ok)
+	msgSubmit, err := types5.NewMsgSubmitProposal(proposal, deposit, from)
+	suite.Require().NoError(err)
+	return suite.CreateTestEIP712CosmosTxBuilder(from, priv, chainId, gas, gasAmount, msgSubmit)
+}
+
+func (suite *AnteTestSuite) CreateTestEIP712GrantAllowance(from sdk.AccAddress, priv cryptotypes.PrivKey, chainId string, gas uint64, gasAmount sdk.Coins) client.TxBuilder {
+	spendLimit := sdk.NewCoins(sdk.NewInt64Coin(evmtypes.DefaultEVMDenom, 10))
+	threeHours := time.Now().Add(3 * time.Hour)
+	basic := &feegrant.BasicAllowance{
+		SpendLimit: spendLimit,
+		Expiration: &threeHours,
+	}
+	granted := tests.GenerateAddress()
+	grantedAddr := suite.app.AccountKeeper.NewAccountWithAddress(suite.ctx, granted.Bytes())
+	msgGrant, err := feegrant.NewMsgGrantAllowance(basic, from, grantedAddr.GetAddress())
+	suite.Require().NoError(err)
+	return suite.CreateTestEIP712CosmosTxBuilder(from, priv, chainId, gas, gasAmount, msgGrant)
+}
+
+func (suite *AnteTestSuite) CreateTestEIP712MsgEditValidator(from sdk.AccAddress, priv cryptotypes.PrivKey, chainId string, gas uint64, gasAmount sdk.Coins) client.TxBuilder {
+	valAddr := sdk.ValAddress(from.Bytes())
+	msgEdit := types3.NewMsgEditValidator(
+		valAddr,
+		types3.NewDescription("moniker", "identity", "website", "security_contract", "details"),
+		nil,
+		nil,
+	)
+	return suite.CreateTestEIP712CosmosTxBuilder(from, priv, chainId, gas, gasAmount, msgEdit)
+}
+
+func (suite *AnteTestSuite) CreateTestEIP712MsgSubmitEvidence(from sdk.AccAddress, priv cryptotypes.PrivKey, chainId string, gas uint64, gasAmount sdk.Coins) client.TxBuilder {
+	pk := ed25519.GenPrivKey()
+	msgEvidence, err := evtypes.NewMsgSubmitEvidence(from, &evtypes.Equivocation{
+		Height:           11,
+		Time:             time.Now().UTC(),
+		Power:            100,
+		ConsensusAddress: pk.PubKey().Address().String(),
+	})
+	suite.Require().NoError(err)
+
+	return suite.CreateTestEIP712CosmosTxBuilder(from, priv, chainId, gas, gasAmount, msgEvidence)
+}
+
+// StdSignBytes returns the bytes to sign for a transaction.
+func StdSignBytes(cdc *codec.LegacyAmino, chainID string, accnum uint64, sequence uint64, timeout uint64, fee legacytx.StdFee, msgs []sdk.Msg, memo string, tip *txtypes.Tip) []byte {
+	msgsBytes := make([]json.RawMessage, 0, len(msgs))
+	for _, msg := range msgs {
+		legacyMsg, ok := msg.(legacytx.LegacyMsg)
+		if !ok {
+			panic(fmt.Errorf("expected %T when using amino JSON", (*legacytx.LegacyMsg)(nil)))
+		}
+
+		msgsBytes = append(msgsBytes, json.RawMessage(legacyMsg.GetSignBytes()))
+	}
+
+	var stdTip *legacytx.StdTip
+	if tip != nil {
+		if tip.Tipper == "" {
+			panic(fmt.Errorf("tipper cannot be empty"))
+		}
+
+		stdTip = &legacytx.StdTip{Amount: tip.Amount, Tipper: tip.Tipper}
+	}
+
+	bz, err := cdc.MarshalJSON(legacytx.StdSignDoc{
+		AccountNumber: accnum,
+		ChainID:       chainID,
+		Fee:           json.RawMessage(fee.Bytes()),
+		Memo:          memo,
+		Msgs:          msgsBytes,
+		Sequence:      sequence,
+		TimeoutHeight: timeout,
+		Tip:           stdTip,
+	})
+	if err != nil {
+		panic(err)
+	}
+
+	return sdk.MustSortJSON(bz)
+}
+
 func (suite *AnteTestSuite) CreateTestEIP712CosmosTxBuilder(
 	from sdk.AccAddress, priv cryptotypes.PrivKey, chainId string, gas uint64, gasAmount sdk.Coins, msg sdk.Msg,
 ) client.TxBuilder {
@ -281,6 +390,11 @@ func (suite *AnteTestSuite) CreateTestEIP712CosmosTxBuilder(

 	// GenerateTypedData TypedData
 	var ethermintCodec codec.ProtoCodecMarshaler
+	registry := codectypes.NewInterfaceRegistry()
+	types.RegisterInterfaces(registry)
+	ethermintCodec = codec.NewProtoCodec(registry)
+	cryptocodec.RegisterInterfaces(registry)
+
 	fee := legacytx.NewStdFee(gas, gasAmount)
 	accNumber := suite.app.AccountKeeper.GetAccount(suite.ctx, from).GetAccountNumber()

--- a/ethereum/eip712/eip712.go
+++ b/ethereum/eip712/eip712.go
@ -10,6 +10,7 @@ import (
 	"time"

 	sdkmath "cosmossdk.io/math"
+	"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
 	"golang.org/x/text/cases"
 	"golang.org/x/text/language"

@ -391,8 +392,11 @@ var (
 	addressType   = reflect.TypeOf(common.Address{})
 	bigIntType    = reflect.TypeOf(big.Int{})
 	cosmIntType   = reflect.TypeOf(sdkmath.Int{})
+	cosmDecType   = reflect.TypeOf(sdk.Dec{})
 	cosmosAnyType = reflect.TypeOf(&codectypes.Any{})
 	timeType      = reflect.TypeOf(time.Time{})
+
+	edType = reflect.TypeOf(ed25519.PubKey{})
 )

 // typToEth supports only basic types and arrays of basic types.
@ -438,6 +442,8 @@ func typToEth(typ reflect.Type) string {
 	case reflect.Ptr:
 		if typ.Elem().ConvertibleTo(bigIntType) ||
 			typ.Elem().ConvertibleTo(timeType) ||
+			typ.Elem().ConvertibleTo(edType) ||
+			typ.Elem().ConvertibleTo(cosmDecType) ||
 			typ.Elem().ConvertibleTo(cosmIntType) {
 			return str
 		}
@ -445,7 +451,9 @@ func typToEth(typ reflect.Type) string {
 		if typ.ConvertibleTo(hashType) ||
 			typ.ConvertibleTo(addressType) ||
 			typ.ConvertibleTo(bigIntType) ||
+			typ.ConvertibleTo(edType) ||
 			typ.ConvertibleTo(timeType) ||
+			typ.ConvertibleTo(cosmDecType) ||
 			typ.ConvertibleTo(cosmIntType) {
 			return str
 		}