IBC transfer precompile (#1485)

* plug in keepers

* add ibc precompile

* remove redundant keepers

app/app.go

@@ -586,7 +586,9 @@ func New(
 		wasmOpts...,
 	)
 
-	app.EvmKeeper = *evmkeeper.NewKeeper(keys[evmtypes.StoreKey], memKeys[evmtypes.MemStoreKey], app.GetSubspace(evmtypes.ModuleName), app.BankKeeper, &app.AccountKeeper, &app.StakingKeeper)
+	app.EvmKeeper = *evmkeeper.NewKeeper(keys[evmtypes.StoreKey], memKeys[evmtypes.MemStoreKey],
+		app.GetSubspace(evmtypes.ModuleName), app.BankKeeper, &app.AccountKeeper, &app.StakingKeeper,
+		app.TransferKeeper)
 	app.evmRPCConfig, err = evmrpc.ReadConfig(appOpts)
 	if err != nil {
 		panic(fmt.Sprintf("error reading EVM config due to %s", err))
@@ -664,6 +666,7 @@ func New(
 			app.GovKeeper,
 			app.DistrKeeper,
 			app.OracleKeeper,
+			app.TransferKeeper,
 		); err != nil {
 			panic(err)
 		}

precompiles/common/expected_keepers.go

@@ -7,6 +7,7 @@ import (
 	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
 	govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
 	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
+	clienttypes "github.com/cosmos/ibc-go/v3/modules/core/02-client/types"
 	"github.com/ethereum/go-ethereum/common"
 	oracletypes "github.com/sei-protocol/sei-chain/x/oracle/types"
 )
@@ -61,3 +62,16 @@ type DistributionKeeper interface {
 	SetWithdrawAddr(ctx sdk.Context, delegatorAddr sdk.AccAddress, withdrawAddr sdk.AccAddress) error
 	WithdrawDelegationRewards(ctx sdk.Context, delAddr sdk.AccAddress, valAddr sdk.ValAddress) (sdk.Coins, error)
 }
+
+type TransferKeeper interface {
+	SendTransfer(
+		ctx sdk.Context,
+		sourcePort,
+		sourceChannel string,
+		token sdk.Coin,
+		sender sdk.AccAddress,
+		receiver string,
+		timeoutHeight clienttypes.Height,
+		timeoutTimestamp uint64,
+	) error
+}

precompiles/common/precompiles.go

@@ -8,6 +8,7 @@ import (
 	storetypes "github.com/cosmos/cosmos-sdk/store/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/vm"
 	"github.com/sei-protocol/sei-chain/x/evm/state"
 )
@@ -83,3 +84,21 @@ func HandlePaymentUseiWei(ctx sdk.Context, precompileAddr sdk.AccAddress, payer
 	}
 	return usei, wei, nil
 }
+
+func GetRemainingGas(ctx sdk.Context, evmKeeper EVMKeeper) uint64 {
+	gasMultipler := evmKeeper.GetPriorityNormalizer(ctx)
+	seiGasRemaining := ctx.GasMeter().Limit() - ctx.GasMeter().GasConsumedToLimit()
+	return new(big.Int).Mul(new(big.Int).SetUint64(seiGasRemaining), gasMultipler.RoundInt().BigInt()).Uint64()
+}
+
+func ValidateCaller(ctx sdk.Context, evmKeeper EVMKeeper, caller common.Address, callingContract common.Address) error {
+	if caller == callingContract {
+		// not a delegate call
+		return nil
+	}
+	codeHash := evmKeeper.GetCodeHash(ctx, callingContract)
+	if evmKeeper.IsCodeHashWhitelistedForDelegateCall(ctx, codeHash) {
+		return nil
+	}
+	return fmt.Errorf("calling contract %s with code hash %s is not whitelisted for delegate calls", callingContract.Hex(), codeHash.Hex())
+}

precompiles/ibc/IBC.sol

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+address constant IBC_PRECOMPILE_ADDRESS = 0x0000000000000000000000000000000000001009;
+
+IBC constant IBC_CONTRACT = IBC(
+    IBC_PRECOMPILE_ADDRESS
+);
+
+interface IBC {
+    // Transactions
+    function transfer(
+        string toAddress,
+        string memory port,
+        string memory channel,
+        string memory denom,
+        uint256 amount,
+        uint64 revisionNumber,
+        uint64 revisionHeight,
+        uint64 timeoutTimestamp
+    ) external returns (bool success);
+}

precompiles/ibc/abi.json

@@ -0,0 +1,56 @@
+[
+  {
+    "inputs": [
+      {
+        "internalType": "string",
+        "name": "toAddress",
+        "type": "string"
+      },
+      {
+        "internalType": "string",
+        "name": "port",
+        "type": "string"
+      },
+      {
+        "internalType": "string",
+        "name": "channel",
+        "type": "string"
+      },
+      {
+        "internalType": "string",
+        "name": "denom",
+        "type": "string"
+      },
+      {
+        "internalType": "uint256",
+        "name": "amount",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint64",
+        "name": "revisionNumber",
+        "type": "uint64"
+      },
+      {
+        "internalType": "uint64",
+        "name": "revisionHeight",
+        "type": "uint64"
+      },
+      {
+        "internalType": "uint64",
+        "name": "timeoutTimestamp",
+        "type": "uint64"
+      }
+    ],
+    "name": "transfer",
+    "outputs": [
+      {
+        "internalType": "bool",
+        "name": "success",
+        "type": "bool"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  }
+]