Initial implementation of IBC Precompile (branch forked from yevhenii/precompile-v2)

app/app.go

@@ -421,7 +421,7 @@ func NewEthermintApp(
 	app.EvmKeeper = evmkeeper.NewKeeper(
 		appCodec, keys[evmtypes.StoreKey], tkeys[evmtypes.TransientKey],
 		authtypes.NewModuleAddress(govtypes.ModuleName),
-		app.AccountKeeper, app.BankKeeper, app.StakingKeeper, app.FeeMarketKeeper,
+		app.AccountKeeper, app.BankKeeper, app.StakingKeeper, app.FeeMarketKeeper, nil,
 		nil, geth.NewEVM, tracer, evmSs,
 	)
 

go.sum

@@ -901,6 +901,7 @@ github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6So
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
+github.com/rogpeppe/go-internal v1.8.1/go.mod h1:JeRgkft04UBgHMgCIwADu4Pn6Mtm5d4nPKWu0nJ5d+o=
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/rs/cors v1.7.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
@@ -978,7 +979,6 @@ github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=

x/evm/keeper/keeper.go

@@ -63,6 +63,8 @@ type Keeper struct {
 	// fetch EIP1559 base fee and parameters
 	feeMarketKeeper types.FeeMarketKeeper
 
+	ibcTransferKeeper statedb.IBCTransferKeeper
+
 	// chain ID number obtained from the context's chain id
 	eip155ChainID *big.Int
 
@@ -90,6 +92,7 @@ func NewKeeper(
 	bankKeeper types.BankKeeper,
 	sk types.StakingKeeper,
 	fmk types.FeeMarketKeeper,
+	ibcTransferKeeper statedb.IBCTransferKeeper,
 	customPrecompiles evm.PrecompiledContracts,
 	evmConstructor evm.Constructor,
 	tracer string,
@@ -117,6 +120,7 @@ func NewKeeper(
 		bankKeeper:        bankKeeper,
 		stakingKeeper:     sk,
 		feeMarketKeeper:   fmk,
+		ibcTransferKeeper: ibcTransferKeeper,
 		storeKey:          storeKey,
 		transientKey:      transientKey,
 		customPrecompiles: customPrecompiles,
@@ -398,3 +402,7 @@ func (k Keeper) AddTransientGasUsed(ctx sdk.Context, gasUsed uint64) (uint64, er
 	k.SetTransientGasUsed(ctx, result)
 	return result, nil
 }
+
+func (k Keeper) IBCTransferKeeper() statedb.IBCTransferKeeper {
+	return k.ibcTransferKeeper
+}

x/evm/keeper/state_transition.go

@@ -52,7 +52,9 @@
 	tracer vm.EVMLogger,
 	stateDB vm.StateDB,
 ) evm.EVM {
+	goCtx := sdk.WrapSDKContext(ctx)
+
 	blockCtx := vm.BlockContext{
 		CanTransfer: core.CanTransfer,
 		Transfer:    core.Transfer,
 		GetHash:     k.GetHashFn(ctx),
@@ -65,12 +67,12 @@
 		Random:      nil, // not supported
 	}
 
 	txCtx := core.NewEVMTxContext(msg)
 	if tracer == nil {
 		tracer = k.Tracer(ctx, msg, cfg.ChainConfig)
 	}
 	vmConfig := k.VMConfig(ctx, msg, cfg, tracer)
-	return k.evmConstructor(blockCtx, txCtx, stateDB, cfg.ChainConfig, vmConfig, k.customPrecompiles)
+	return k.evmConstructor(goCtx, blockCtx, txCtx, stateDB, cfg.ChainConfig, vmConfig, k.customPrecompiles)
 }
 
 // GetHashFn implements vm.GetHashFunc for Ethermint. It handles 3 cases:

x/evm/statedb/interfaces.go

@@ -16,7 +16,10 @@
 package statedb
 
 import (
+	"context"
+
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	ibctransfertypes "github.com/cosmos/ibc-go/v6/modules/apps/transfer/types"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/vm"
 )
@@ -31,6 +34,10 @@ type ExtStateDB interface {
 	AppendJournalEntry(JournalEntry)
 }
 
+type IBCTransferKeeper interface {
+	Transfer(goCtx context.Context, msg *ibctransfertypes.MsgTransfer) (*ibctransfertypes.MsgTransferResponse, error)
+}
+
 // Keeper provide underlying storage of StateDB
 type Keeper interface {
 	// Read methods
@@ -45,4 +52,6 @@ type Keeper interface {
 	SetState(ctx sdk.Context, addr common.Address, key common.Hash, value []byte)
 	SetCode(ctx sdk.Context, codeHash []byte, code []byte)
 	DeleteAccount(ctx sdk.Context, addr common.Address) error
+
+	IBCTransferKeeper() IBCTransferKeeper
 }

x/evm/statedb/statedb.go

@@ -16,16 +16,21 @@
 package statedb
 
 import (
+	"context"
 	"fmt"
 	"math/big"
 	"sort"
 
 	errorsmod "cosmossdk.io/errors"
+	"github.com/cosmos/cosmos-sdk/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	ibctransfertypes "github.com/cosmos/ibc-go/v6/modules/apps/transfer/types"
+	ibcclienttypes "github.com/cosmos/ibc-go/v6/modules/core/02-client/types"
 	"github.com/ethereum/go-ethereum/common"
 	ethtypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/precompile/contract"
 )
 
 // revision is the identifier of a version of state.
@@ -85,6 +90,10 @@ func (s *StateDB) Keeper() Keeper {
 	return s.keeper
 }
 
+func (s *StateDB) Context() context.Context {
+	return s.ctx
+}
+
 // AddLog adds a log, called by evm.
 func (s *StateDB) AddLog(log *ethtypes.Log) {
 	s.journal.append(addLogChange{})
@@ -476,3 +485,45 @@ func (s *StateDB) Commit() error {
 	}
 	return nil
 }
+
+func (s *StateDB) IBCTransfer(goCtx context.Context, msg *contract.MsgTransfer) (*contract.MsgTransferResponse, error) {
+	resp, err := s.keeper.IBCTransferKeeper().Transfer(goCtx, newMsgTransfer(msg))
+	if err != nil {
+		return nil, err
+	}
+
+	return newMsgTransferResponse(resp), nil
+}
+
+func newMsgTransfer(m *contract.MsgTransfer) *ibctransfertypes.MsgTransfer {
+	return &ibctransfertypes.MsgTransfer{
+		SourcePort:       m.SourcePort,
+		SourceChannel:    m.SourceChannel,
+		Token:            newCoin(m.Token),
+		Sender:           m.Sender,
+		Receiver:         m.Receiver,
+		TimeoutHeight:    newHeight(m.TimeoutHeight),
+		TimeoutTimestamp: m.TimeoutTimestamp,
+		Memo:             m.Memo,
+	}
+}
+
+func newCoin(c contract.Coin) types.Coin {
+	return types.Coin{
+		Denom:  c.Denom,
+		Amount: c.Amount,
+	}
+}
+
+func newHeight(h contract.Height) ibcclienttypes.Height {
+	return ibcclienttypes.Height{
+		RevisionNumber: h.RevisionNumber,
+		RevisionHeight: h.RevisionHeight,
+	}
+}
+
+func newMsgTransferResponse(r *ibctransfertypes.MsgTransferResponse) *contract.MsgTransferResponse {
+	return &contract.MsgTransferResponse{
+		Sequence: r.Sequence,
+	}
+}

x/evm/vm/geth/geth.go

@@ -16,6 +16,7 @@
 package geth
 
 import (
+	"context"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -40,6 +41,7 @@ type EVM struct {
 // the default precompiled contracts and the EVM concrete implementation from
 // geth.
 func NewEVM(
+	goCtx context.Context,
 	blockCtx vm.BlockContext,
 	txCtx vm.TxContext,
 	stateDB vm.StateDB,
@@ -48,7 +50,7 @@ func NewEVM(
 	_ evm.PrecompiledContracts, // unused
 ) evm.EVM {
 	return &EVM{
-		EVM: vm.NewEVM(blockCtx, txCtx, stateDB, chainConfig, config),
+		EVM: vm.NewEVMWithContext(goCtx, blockCtx, txCtx, stateDB, chainConfig, config),
 	}
 }
 

x/evm/vm/interface.go

@@ -16,6 +16,7 @@
 package vm
 
 import (
+	"context"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -75,6 +76,7 @@ type EVM interface {
 // Constructor defines the function used to instantiate the EVM on
 // each state transition.
 type Constructor func(
+	goCtx context.Context,
 	blockCtx vm.BlockContext,
 	txCtx vm.TxContext,
 	stateDB vm.StateDB,