extract zrc20 method call

precompiles/bank/bank.go

@@ -9,7 +9,6 @@ import (
 	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/vm"
-	"github.com/zeta-chain/protocol-contracts/v2/pkg/zrc20.sol"
 
 	ptypes "github.com/zeta-chain/node/precompiles/types"
 	fungiblekeeper "github.com/zeta-chain/node/x/fungible/keeper"
@@ -70,18 +69,10 @@ func NewIBankContract(
 		fungibleKeeper.GetAuthKeeper().SetAccount(ctx, authtypes.NewBaseAccount(accAddress, nil, 0, 0))
 	}
 
-	// Instantiate the ZRC20 ABI only one time.
-	// This avoids instantiating it every time deposit or withdraw are called.
-	zrc20ABI, err := zrc20.ZRC20MetaData.GetAbi()
-	if err != nil {
-		return nil
-	}
-
 	return &Contract{
 		BaseContract:   ptypes.NewBaseContract(ContractAddress),
 		bankKeeper:     bankKeeper,
 		fungibleKeeper: fungibleKeeper,
-		zrc20ABI:       zrc20ABI,
 		cdc:            cdc,
 		kvGasConfig:    kvGasConfig,
 	}

precompiles/bank/method_deposit.go

@@ -100,7 +100,7 @@ func (c *Contract) deposit(
 	}
 
 	// 2. Effect: subtract balance.
-	if err := c.fungibleKeeper.LockZRC20(ctx, c.zrc20ABI, zrc20Addr, caller, amount); err != nil {
+	if err := c.fungibleKeeper.LockZRC20(ctx, zrc20Addr, caller, amount); err != nil {
 		return nil, &ptypes.ErrUnexpected{
 			When: "LockZRC20InBank",
 			Got:  err.Error(),

precompiles/bank/method_withdraw.go

@@ -85,7 +85,7 @@ func (c *Contract) withdraw(
 	}
 
 	// Check if fungible address has enough ZRC20 balance.
-	if err := c.fungibleKeeper.CheckFungibleZRC20Balance(ctx, c.zrc20ABI, zrc20Addr, amount); err != nil {
+	if err := c.fungibleKeeper.CheckFungibleZRC20Balance(ctx, zrc20Addr, amount); err != nil {
 		return nil, &ptypes.ErrUnexpected{
 			When: "balanceOf",
 			Got:  err.Error(),

x/fungible/keeper/zrc20_check_allowance.go

@@ -5,7 +5,6 @@ import (
 	"math/big"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
 
 	fungibletypes "github.com/zeta-chain/node/x/fungible/types"
@@ -17,7 +16,6 @@ const allowance = "allowance"
 // is equal or greater than the provided amount.
 func (k Keeper) CheckFungibleZRC20Allowance(
 	ctx sdk.Context,
-	zrc20ABI *abi.ABI,
 	from, zrc20Address common.Address,
 	amount *big.Int,
 ) error {
@@ -34,27 +32,8 @@ func (k Keeper) CheckFungibleZRC20Allowance(
 	}
 
 	args := []interface{}{from, fungibletypes.ModuleAddressZEVM}
-	res, err := k.CallEVM(
-		ctx,
-		*zrc20ABI,
-		fungibletypes.ModuleAddressZEVM,
-		zrc20Address,
-		big.NewInt(0),
-		nil,
-		true,
-		true,
-		allowance,
-		args...,
-	)
-	if err != nil {
-		return err
-	}
-
-	if res.VmError != "" {
-		return fmt.Errorf("%s", res.VmError)
-	}
 
-	ret, err := zrc20ABI.Methods[allowance].Outputs.Unpack(res.Ret)
+	ret, err := k.CallZRC20Method(ctx, zrc20Address, allowance, args...)
 	if err != nil {
 		return err
 	}

x/fungible/keeper/zrc20_check_balance.go

@@ -5,7 +5,6 @@ import (
 	"math/big"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
 
 	fungibletypes "github.com/zeta-chain/node/x/fungible/types"
@@ -17,7 +16,6 @@ const balanceOf = "balanceOf"
 // is equal or greater than the provided amount.
 func (k Keeper) CheckFungibleZRC20Balance(
 	ctx sdk.Context,
-	zrc20ABI *abi.ABI,
 	zrc20Address common.Address,
 	amount *big.Int,
 ) error {
@@ -29,27 +27,7 @@ func (k Keeper) CheckFungibleZRC20Balance(
 		return fmt.Errorf("zrc20 address cannot be zero")
 	}
 
-	res, err := k.CallEVM(
-		ctx,
-		*zrc20ABI,
-		fungibletypes.ModuleAddressZEVM,
-		zrc20Address,
-		big.NewInt(0),
-		nil,
-		true,
-		true,
-		balanceOf,
-		fungibletypes.ModuleAddressZEVM,
-	)
-	if err != nil {
-		return err
-	}
-
-	if res.VmError != "" {
-		return fmt.Errorf("%s", res.VmError)
-	}
-
-	ret, err := zrc20ABI.Methods[balanceOf].Outputs.Unpack(res.Ret)
+	ret, err := k.CallZRC20Method(ctx, zrc20Address, balanceOf, fungibletypes.ModuleAddressZEVM)
 	if err != nil {
 		return err
 	}

x/fungible/keeper/zrc20_lock_token.go

@@ -5,7 +5,6 @@ import (
 	"math/big"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
 
 	fungibletypes "github.com/zeta-chain/node/x/fungible/types"
@@ -19,7 +18,6 @@ var zeroAddress common.Address = common.HexToAddress("0x000000000000000000000000
 // The caller must have approved the bank contract to spend the amount of ZRC20 tokens.
 func (k Keeper) LockZRC20(
 	ctx sdk.Context,
-	zrc20ABI *abi.ABI,
 	zrc20Address, from common.Address,
 	amount *big.Int,
 ) error {
@@ -39,32 +37,13 @@ func (k Keeper) LockZRC20(
 		return err
 	}
 
-	if err := k.CheckFungibleZRC20Allowance(ctx, zrc20ABI, from, zrc20Address, amount); err != nil {
+	if err := k.CheckFungibleZRC20Allowance(ctx, from, zrc20Address, amount); err != nil {
 		return err
 	}
 
 	args := []interface{}{from, fungibletypes.ModuleAddressZEVM, amount}
-	res, err := k.CallEVM(
-		ctx,
-		*zrc20ABI,
-		fungibletypes.ModuleAddressZEVM,
-		zrc20Address,
-		big.NewInt(0),
-		nil,
-		true,
-		true,
-		transferFrom,
-		args...,
-	)
-	if err != nil {
-		return err
-	}
-
-	if res.VmError != "" {
-		return fmt.Errorf("%s", res.VmError)
-	}
 
-	ret, err := zrc20ABI.Methods[transferFrom].Outputs.Unpack(res.Ret)
+	ret, err := k.CallZRC20Method(ctx, zrc20Address, transferFrom, args...)
 	if err != nil {
 		return err
 	}

x/fungible/keeper/zrc20_method_call.go

@@ -0,0 +1,51 @@
+package keeper
+
+import (
+	"fmt"
+	"math/big"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/zeta-chain/protocol-contracts/v2/pkg/zrc20.sol"
+
+	fungibletypes "github.com/zeta-chain/node/x/fungible/types"
+)
+
+func (k Keeper) CallZRC20Method(
+	ctx sdk.Context,
+	zrc20Address common.Address,
+	method string,
+	args ...interface{},
+) ([]interface{}, error) {
+	zrc20ABI, err := zrc20.ZRC20MetaData.GetAbi()
+	if err != nil {
+		return nil, err
+	}
+
+	res, err := k.CallEVM(
+		ctx,
+		*zrc20ABI,
+		fungibletypes.ModuleAddressZEVM,
+		zrc20Address,
+		big.NewInt(0),
+		nil,
+		true,
+		true,
+		method,
+		args...,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	if res.VmError != "" {
+		return nil, fmt.Errorf("%s", res.VmError)
+	}
+
+	ret, err := zrc20ABI.Methods[method].Outputs.Unpack(res.Ret)
+	if err != nil {
+		return nil, err
+	}
+
+	return ret, nil
+}

x/fungible/keeper/zrc20_unlock_token.go

@@ -5,18 +5,14 @@ import (
 	"math/big"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
-
-	fungibletypes "github.com/zeta-chain/node/x/fungible/types"
 )
 
 const transfer = "transfer"
 
 // UnlockZRC20 unlocks ZRC20 tokens and sends them to the "to" address.
 func (k Keeper) UnlockZRC20(
 	ctx sdk.Context,
-	zrc20ABI *abi.ABI,
 	zrc20Address, to common.Address,
 	amount *big.Int,
 ) error {
@@ -36,32 +32,13 @@ func (k Keeper) UnlockZRC20(
 		return err
 	}
 
-	if err := k.CheckFungibleZRC20Balance(ctx, zrc20ABI, zrc20Address, amount); err != nil {
+	if err := k.CheckFungibleZRC20Balance(ctx, zrc20Address, amount); err != nil {
 		return err
 	}
 
 	args := []interface{}{to, amount}
-	res, err := k.CallEVM(
-		ctx,
-		*zrc20ABI,
-		fungibletypes.ModuleAddressZEVM,
-		zrc20Address,
-		big.NewInt(0),
-		nil,
-		true,
-		true,
-		transfer,
-		args...,
-	)
-	if err != nil {
-		return err
-	}
-
-	if res.VmError != "" {
-		return fmt.Errorf("%s", res.VmError)
-	}
 
-	ret, err := zrc20ABI.Methods[transfer].Outputs.Unpack(res.Ret)
+	ret, err := k.CallZRC20Method(ctx, zrc20Address, transfer, args...)
 	if err != nil {
 		return err
 	}