test: add test & fix error

modules/token/keeper/erc20.go

@@ -31,8 +31,17 @@ func (k Keeper) DeployERC20(
 	name string,
 	symbol string,
 	minUnit string,
-	scale int8,
+	scale uint8,
 ) (common.Address, error) {
+	token, err := k.buildERC20Token(ctx, name, symbol, minUnit, uint32(scale))
+	if err != nil {
+		return common.Address{}, err
+	}
+
+	if len(token.Contract) > 0 {
+		return common.Address{}, errorsmod.Wrapf(types.ErrERC20AlreadyExists, "token: %s already deployed erc20 contract: %s", token.Symbol, token.Contract)
+	}
+
 	contractArgs, err := contracts.ERC20TokenContract.ABI.Pack(
 		"",
 		name,
@@ -61,6 +70,9 @@ func (k Keeper) DeployERC20(
 		return common.Address{}, errorsmod.Wrapf(types.ErrVMExecution, "failed to deploy contract for %s, reason: %s", name, result.Revert())
 	}
 
+	token.Contract = contractAddr.String()
+	k.upsertToken(ctx, *token)
+
 	ctx.EventManager().EmitTypedEvent(&v1.EventDeployERC20{
 		Symbol:   symbol,
 		Name:     name,
@@ -159,7 +171,7 @@ func (k Keeper) SwapToERC20(
 		return err
 	}
 
-	if err := k.MintERC20(ctx, contract, receiver, amount.Amount.Uint64()); err != nil {
+	if err := k.MintERC20(ctx, contract, receiver, amount.Amount.BigInt()); err != nil {
 		return err
 	}
 
@@ -185,9 +197,12 @@ func (k Keeper) SwapToERC20(
 func (k Keeper) MintERC20(
 	ctx sdk.Context,
 	contract, to common.Address,
-	amount uint64,
+	amount *big.Int,
 ) error {
-	balanceBefore := k.BalanceOf(ctx, contract, to)
+	balanceBefore, err := k.BalanceOf(ctx, contract, to)
+	if err != nil {
+		return err
+	}
 
 	abi := contracts.ERC20TokenContract.ABI
 	res, err := k.CallEVM(ctx, abi, k.moduleAddress(), contract, true, contracts.MethodMint, to, amount)
@@ -203,8 +218,11 @@ func (k Keeper) MintERC20(
 		)
 	}
 
-	balanceAfter := k.BalanceOf(ctx, contract, to)
-	expectBalance := big.NewInt(0).Add(balanceBefore, big.NewInt(int64(amount)))
+	balanceAfter, err := k.BalanceOf(ctx, contract, to)
+	if err != nil {
+		return err
+	}
+	expectBalance := big.NewInt(0).Add(balanceBefore, amount)
 	if r := expectBalance.Cmp(balanceAfter); r != 0 {
 		return errorsmod.Wrapf(
 			types.ErrVMExecution, "failed to mint token correctly, expected after-mint amount is incorrect: %s, expected %d, actual %d",
@@ -230,7 +248,11 @@ func (k Keeper) BurnERC20(
 	contract, from common.Address,
 	amount *big.Int,
 ) error {
-	balanceBefore := k.BalanceOf(ctx, contract, from)
+	balanceBefore, err := k.BalanceOf(ctx, contract, from)
+	if err != nil {
+		return err
+	}
+
 	if r := balanceBefore.Cmp(amount); r < 0 {
 		return errorsmod.Wrapf(
 			sdkerrors.ErrInsufficientFunds,
@@ -250,7 +272,10 @@ func (k Keeper) BurnERC20(
 		return errorsmod.Wrapf(types.ErrVMExecution, "failed to burn %d", amount)
 	}
 
-	balanceAfter := k.BalanceOf(ctx, contract, from)
+	balanceAfter, err := k.BalanceOf(ctx, contract, from)
+	if err != nil {
+		return err
+	}
 	expectBalance := big.NewInt(0).Sub(balanceBefore, amount)
 	if r := expectBalance.Cmp(balanceAfter); r != 0 {
 		return errorsmod.Wrapf(
@@ -275,24 +300,24 @@ func (k Keeper) BurnERC20(
 func (k Keeper) BalanceOf(
 	ctx sdk.Context,
 	contract, account common.Address,
-) *big.Int {
+) (*big.Int, error) {
 	abi := contracts.ERC20TokenContract.ABI
 	res, err := k.CallEVM(ctx, abi, k.moduleAddress(), contract, false, contracts.MethodBalanceOf, account)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	unpacked, err := abi.Unpack(contracts.MethodBalanceOf, res.Ret)
 	if err != nil || len(unpacked) == 0 {
-		return nil
+		return nil, err
 	}
 
 	balance, ok := unpacked[0].(*big.Int)
 	if !ok {
-		return nil
+		return nil, err
 	}
 
-	return balance
+	return balance, nil
 }
 
 func (k Keeper) moduleAddress() common.Address {

modules/token/keeper/erc20_test.go

@@ -0,0 +1,109 @@
+package keeper_test
+
+import (
+	"math/big"
+
+	"github.com/cometbft/cometbft/crypto/tmhash"
+	"github.com/ethereum/go-ethereum/common"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	v1 "github.com/irisnet/irismod/modules/token/types/v1"
+)
+
+func (suite *KeeperTestSuite) TestDeployERC20() {
+	token := v1.NewToken("btc", "Bitcoin Network", "satoshi", 18, 21000000, 21000000, false, owner)
+
+	err := suite.keeper.IssueToken(
+		suite.ctx, token.Symbol, token.Name,
+		token.MinUnit, token.Scale, token.InitialSupply,
+		token.MaxSupply, token.Mintable, token.GetOwner(),
+	)
+	suite.NoError(err)
+
+	hash, err := suite.keeper.DeployERC20(suite.ctx, token.Name, token.Symbol, token.MinUnit, uint8(token.Scale))
+	suite.NoError(err)
+	token.Contract = hash.Hex()
+
+	actual, err := suite.keeper.GetToken(suite.ctx, token.Symbol)
+	suite.NoError(err)
+
+	suite.EqualValues(&token, actual.(*v1.Token))
+}
+
+func (suite *KeeperTestSuite) TestSwapFromERC20() {
+	token := v1.NewToken("btc", "Bitcoin Network", "satoshi", 18, 21000000, 21000000, false, owner)
+
+	err := suite.keeper.IssueToken(
+		suite.ctx, token.Symbol, token.Name,
+		token.MinUnit, token.Scale, token.InitialSupply,
+		token.MaxSupply, token.Mintable, token.GetOwner(),
+	)
+	suite.NoError(err)
+
+	contract, err := suite.keeper.DeployERC20(suite.ctx, token.Name, token.Symbol, token.MinUnit, uint8(token.Scale))
+	suite.NoError(err)
+	token.Contract = contract.Hex()
+
+	actual, err := suite.keeper.GetToken(suite.ctx, token.Symbol)
+	suite.NoError(err)
+
+	suite.EqualValues(&token, actual.(*v1.Token))
+
+	cosmosAddr := sdk.AccAddress(tmhash.SumTruncated([]byte("TestSwapFromERC20")))
+	amount := big.NewInt(2e18)
+	evmAddr := common.BytesToAddress(cosmosAddr.Bytes())
+
+	suite.Run("mint erc20", func() {
+		err = suite.keeper.MintERC20(suite.ctx, contract, evmAddr, amount)
+		suite.NoError(err)
+	})
+
+	suite.Run("swap from erc20", func() {
+		wantedAmount := sdk.NewCoin(token.MinUnit, sdk.NewInt(1e18))
+
+		err = suite.keeper.SwapFromERC20(suite.ctx, evmAddr, cosmosAddr, wantedAmount)
+		suite.NoError(err)
+
+		actual := suite.bk.GetBalance(suite.ctx, cosmosAddr, token.MinUnit)
+		suite.True(wantedAmount.Equal(actual), "SwapFromERC20 failed: %s != %s", wantedAmount.String(), actual.String())
+
+		balance, err := suite.keeper.BalanceOf(suite.ctx, contract, evmAddr)
+		suite.NoError(err)
+
+		expect := big.NewInt(0).Sub(amount, wantedAmount.Amount.BigInt())
+		suite.True(expect.Cmp(balance) == 0, "SwapFromERC20 failed balance: %s != %s", expect.String(), balance.String())
+	})
+}
+
+func (suite *KeeperTestSuite) TestSwapToERC20() {
+	token := v1.NewToken("btc", "Bitcoin Network", "satoshi", 18, 21000000, 21000000, false, owner)
+
+	err := suite.keeper.IssueToken(
+		suite.ctx, token.Symbol, token.Name,
+		token.MinUnit, token.Scale, token.InitialSupply,
+		token.MaxSupply, token.Mintable, token.GetOwner(),
+	)
+	suite.NoError(err)
+
+	contract, err := suite.keeper.DeployERC20(suite.ctx, token.Name, token.Symbol, token.MinUnit, uint8(token.Scale))
+	suite.NoError(err)
+
+	sender := token.GetOwner()
+	receiver := common.BytesToAddress(sender.Bytes())
+
+	balanceBefore := suite.bk.GetBalance(suite.ctx, sender,token.MinUnit)
+	suite.Run("swap to erc20", func() {
+		amount := sdk.NewCoin(token.MinUnit, sdk.NewInt(1e18))
+
+		err = suite.keeper.SwapToERC20(suite.ctx, sender, receiver, amount)
+		suite.NoError(err)
+
+		balance, err := suite.keeper.BalanceOf(suite.ctx, contract, receiver)
+		suite.NoError(err)
+		suite.True(amount.Amount.BigInt().Cmp(balance) == 0, "SwapToERC20 failed %s != %s", amount.String(), balance.String())
+
+		actual := suite.bk.GetBalance(suite.ctx, sender, token.MinUnit)
+		suite.True(balanceBefore.Sub(amount).IsEqual(actual), "SwapToERC20 failed %s != %s", balanceBefore.String(), actual.String())
+	})
+}

modules/token/keeper/evm.go

@@ -38,7 +38,7 @@ func (k Keeper) CallEVM(
 	method string,
 	args ...interface{},
 ) (*types.Result, error) {
-	data, err := contractABI.Pack(method, args...)
+ 	data, err := contractABI.Pack(method, args...)
 	if err != nil {
 		return nil, errorsmod.Wrap(
 			tokentypes.ErrABIPack,

modules/token/keeper/msg_server.go

@@ -284,22 +284,10 @@ func (m msgServer) DeployERC20(goCtx context.Context, msg *v1.MsgDeployERC20) (*
 	}
 
 	ctx := sdk.UnwrapSDKContext(goCtx)
-	token, err := m.k.buildERC20Token(ctx, msg.Name, msg.Symbol, msg.MinUnit, msg.Scale)
+	_, err := m.k.DeployERC20(ctx, msg.Name, msg.Symbol, msg.MinUnit, uint8(msg.Scale))
 	if err != nil {
 		return nil, err
 	}
-
-	if len(token.Contract) > 0 {
-		return nil, errorsmod.Wrapf(types.ErrERC20AlreadyExists, "token: %s already deployed erc20 contract: %s", token.Symbol, token.Contract)
-	}
-
-	contractAddr, err := m.k.DeployERC20(ctx, token.Name, token.Symbol, token.MinUnit, int8(token.Scale))
-	if err != nil {
-		return nil, err
-	}
-
-	token.Contract = contractAddr.String()
-	m.k.upsertToken(ctx, *token)
 	return &v1.MsgDeployERC20Response{}, nil
 }
 

simapp/mocks/evm.go

@@ -2,15 +2,19 @@ package mocks
 
 import (
 	"context"
+	"fmt"
 	"math/big"
 
 	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
+	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/crypto"
 
+	"github.com/irisnet/irismod/contracts"
 	tokentypes "github.com/irisnet/irismod/modules/token/types"
 	"github.com/irisnet/irismod/types"
 )
@@ -26,7 +30,35 @@ type evm struct {
 
 // ApplyMessage implements types.EVMKeeper.
 func (e *evm) ApplyMessage(ctx sdk.Context, msg core.Message, tracer vm.EVMLogger, commit bool) (*types.Result, error) {
-	panic("unimplemented")
+	isCreate := msg.To() == nil
+	if isCreate {
+		contractAddr := crypto.CreateAddress(msg.From(), msg.Nonce())
+
+		data := msg.Data()[len(contracts.ERC20TokenContract.Bin):]
+		argss, err := contracts.ERC20TokenContract.ABI.Constructor.Inputs.Unpack(data)
+		if err != nil {
+			return nil, err
+		}
+		name, _ := argss[0].(string)
+		symbol, _ := argss[1].(string)
+		scale, _ := argss[2].(uint8)
+		e.erc20s[contractAddr] = &erc20{
+			address: contractAddr,
+			scale:   scale,
+			name:    name,
+			symbol:  symbol,
+			balance: make(map[common.Address]*big.Int),
+		}
+		return &types.Result{
+			Hash:    contractAddr.Hex(),
+		}, nil
+	}
+
+	erc20Contract, ok := e.erc20s[*msg.To()]
+	if !ok {
+		return nil, fmt.Errorf("erc20 contract not found")
+	}
+	return e.dispatch(erc20Contract, msg.Data())
 }
 
 // ChainID implements types.EVMKeeper.
@@ -39,23 +71,71 @@ func (e *evm) EstimateGas(ctx context.Context, req *types.EthCallRequest) (uint6
 	return 3000000, nil
 }
 
-// FeeDenom implements types.EVMKeeper.
-func (e *evm) FeeDenom() string {
-	return "eris"
-}
-
 // SupportedKey implements types.EVMKeeper.
 func (e *evm) SupportedKey(pubKey cryptotypes.PubKey) bool {
 	return true
 }
 
+func (e *evm) dispatch(contract *erc20, data []byte) (*types.Result, error) {
+	method, err := contracts.ERC20TokenContract.ABI.MethodById(data[0:4])
+	if err != nil {
+		return nil, err
+	}
+
+	ret, err := contract.call(method, data[4:])
+	if err != nil {
+		return nil, err
+	}
+	return &types.Result{
+		Hash: contract.address.Hex(),
+		Ret:  ret,
+	}, nil
+}
+
 type erc20 struct {
-	scale        int8
+	address      common.Address
+	scale        uint8
 	name, symbol string
 
 	balance map[common.Address]*big.Int
 }
 
+func (erc20 erc20) call(method *abi.Method, data []byte) ([]byte, error) {
+	args, err := method.Inputs.Unpack(data)
+	if err != nil {
+		return nil, err
+	}
+
+	switch method.Name {
+	case "name":
+		return method.Outputs.Pack(erc20.name)
+	case "symbol":
+		return method.Outputs.Pack(erc20.symbol)
+	case "decimals":
+		return method.Outputs.Pack(erc20.scale)
+	case "balanceOf":
+		balance,ok := erc20.balance[args[0].(common.Address)]
+		if !ok {
+			return method.Outputs.Pack(big.NewInt(0))
+		}
+		return method.Outputs.Pack(balance)
+	case "mint":
+		to := args[0].(common.Address)
+		balance,ok := erc20.balance[args[0].(common.Address)]
+		if !ok {
+			balance = big.NewInt(0)
+		}
+		erc20.balance[to] = new(big.Int).Add(balance, args[1].(*big.Int))
+		return nil, nil
+	case "burn":
+		from := args[0].(common.Address)
+		erc20.balance[from] = new(big.Int).Sub(erc20.balance[from], args[1].(*big.Int))
+		return nil, nil
+	default:
+		return nil, fmt.Errorf("unknown method %s", method.Name)
+	}
+}
+
 type transferKeeper struct{}
 
 // HasTrace implements types.ICS20Keeper.