deploy fee denom erc20 contract at genesis initialize

x/evm/keeper/erc20.go

@@ -278,7 +278,6 @@ func (k ERC20Keeper) IterateSupply(ctx context.Context, cb func(supply sdk.Coin)
 
 // MintCoins implements IERC20Keeper.
 func (k ERC20Keeper) MintCoins(ctx context.Context, addr sdk.AccAddress, amount sdk.Coins) error {
-	sdkCtx := sdk.UnwrapSDKContext(ctx)
 	evmAddr, err := k.convertToEVMAddress(ctx, addr, false)
 	if err != nil {
 		return err
@@ -294,37 +293,10 @@ func (k ERC20Keeper) MintCoins(ctx context.Context, addr sdk.AccAddress, amount
 		if found, err := k.ERC20ContractAddrsByDenom.Has(ctx, denom); err != nil {
 			return err
 		} else if !found {
-			contractAddr, err := k.nextContractAddress(ctx, types.ERC20FactoryAddress())
+			err := k.CreateERC20(ctx, denom)
 			if err != nil {
 				return err
 			}
-
-			if err := k.ERC20DenomsByContractAddr.Set(ctx, contractAddr.Bytes(), denom); err != nil {
-				return err
-			}
-
-			if err := k.ERC20ContractAddrsByDenom.Set(ctx, denom, contractAddr.Bytes()); err != nil {
-				return err
-			}
-
-			inputBz, err := k.ERC20FactoryABI.Pack("createERC20", denom, denom, uint8(0))
-			if err != nil {
-				return types.ErrFailedToPackABI.Wrap(err.Error())
-			}
-
-			ret, _, err := k.EVMCall(ctx, types.StdAddress, types.ERC20FactoryAddress(), inputBz, nil)
-			if err != nil {
-				return err
-			}
-
-			// emit erc20 created event
-			sdkCtx.EventManager().EmitEvent(
-				sdk.NewEvent(
-					types.EventTypeERC20Created,
-					sdk.NewAttribute(types.AttributeKeyDenom, denom),
-					sdk.NewAttribute(types.AttributeKeyContract, hexutil.Encode(ret[12:])),
-				),
-			)
 		}
 
 		// mint coin
@@ -347,6 +319,43 @@ func (k ERC20Keeper) MintCoins(ctx context.Context, addr sdk.AccAddress, amount
 	return nil
 }
 
+func (k ERC20Keeper) CreateERC20(ctx context.Context, denom string) error {
+	sdkCtx := sdk.UnwrapSDKContext(ctx)
+	contractAddr, err := k.nextContractAddress(ctx, types.ERC20FactoryAddress())
+	if err != nil {
+		return err
+	}
+
+	if err := k.ERC20DenomsByContractAddr.Set(ctx, contractAddr.Bytes(), denom); err != nil {
+		return err
+	}
+
+	if err := k.ERC20ContractAddrsByDenom.Set(ctx, denom, contractAddr.Bytes()); err != nil {
+		return err
+	}
+
+	inputBz, err := k.ERC20FactoryABI.Pack("createERC20", denom, denom, uint8(0))
+	if err != nil {
+		return types.ErrFailedToPackABI.Wrap(err.Error())
+	}
+
+	ret, _, err := k.EVMCall(ctx, types.StdAddress, types.ERC20FactoryAddress(), inputBz, nil)
+	if err != nil {
+		return err
+	}
+
+	// emit erc20 created event
+	sdkCtx.EventManager().EmitEvent(
+		sdk.NewEvent(
+			types.EventTypeERC20Created,
+			sdk.NewAttribute(types.AttributeKeyDenom, denom),
+			sdk.NewAttribute(types.AttributeKeyContract, hexutil.Encode(ret[12:])),
+		),
+	)
+
+	return nil
+}
+
 // SendCoins implements IERC20Keeper.
 func (k ERC20Keeper) SendCoins(ctx context.Context, fromAddr sdk.AccAddress, toAddr sdk.AccAddress, amt sdk.Coins) error {
 	evmFromAddr, err := k.convertToEVMAddress(ctx, fromAddr, true)

x/evm/keeper/genesis.go

@@ -20,12 +20,30 @@ func (k Keeper) Initialize(ctx context.Context) error {
 		return err
 	}
 
+	// This is temporal alive flag to prevent checking fee denom erc20 coin existence
+	// during this function execution. It will be reverted to false after the erc20
+	// fee denom contract is deployed.
+	//
+	//
+	// This function is not pointer receiver, so it will not affect the original value.
 	k.initializing = true
 	_, _, _, err = k.EVMCreate2(ctx, types.StdAddress, code, nil, types.ERC20FactorySalt)
 	if err != nil {
 		return err
 	}
 
+	params, err := k.Params.Get(ctx)
+	if err != nil {
+		return err
+	}
+
+	// deploy fee denom erc20 coins at genesis bootstrapping
+	err = k.erc20Keeper.CreateERC20(ctx, params.FeeDenom)
+	if err != nil {
+		return err
+	}
+
+	// k.initialize will be reverted to false.
 	return nil
 }
 

x/evm/types/expected_keeper.go

@@ -67,6 +67,9 @@ type IERC20Keeper interface {
 
 	// erc20 queries
 	GetDecimals(ctx context.Context, denom string) (uint8, error)
+
+	// contract creation
+	CreateERC20(ctx context.Context, denom string) error
 }
 
 type IERC721Keeper interface {