introduce refund logic for ibc transfer if tx failed by timeout.

app/ibctesting/simapp/app.go

@@ -128,6 +128,8 @@ import (
 	simappupgrades "github.com/notional-labs/composable/v6/app/ibctesting/simapp/upgrades"
 	v6 "github.com/notional-labs/composable/v6/app/ibctesting/simapp/upgrades/v6"
 	v7 "github.com/notional-labs/composable/v6/app/ibctesting/simapp/upgrades/v7"
+	ibctransfermiddleware "github.com/notional-labs/composable/v6/x/ibctransfermiddleware/keeper"
+	ibctransfermiddlewaretypes "github.com/notional-labs/composable/v6/x/ibctransfermiddleware/types"
 	transfermiddleware "github.com/notional-labs/composable/v6/x/transfermiddleware"
 	transfermiddlewarekeeper "github.com/notional-labs/composable/v6/x/transfermiddleware/keeper"
 	transfermiddlewaretypes "github.com/notional-labs/composable/v6/x/transfermiddleware/types"
@@ -258,7 +260,8 @@ type SimApp struct {
 	ICAAuthModule ibcmock.IBCModule
 	FeeMockModule ibcmock.IBCModule
 
-	TransferMiddlewarekeeper transfermiddlewarekeeper.Keeper
+	TransferMiddlewarekeeper    transfermiddlewarekeeper.Keeper
+	IbcTransferMiddlewareKeeper ibctransfermiddleware.Keeper
 
 	// the module manager
 	mm *module.Manager
@@ -378,13 +381,21 @@ func NewSimApp(
 
 	app.FeeGrantKeeper = feegrantkeeper.NewKeeper(appCodec, keys[feegrant.StoreKey], app.AccountKeeper)
 	app.UpgradeKeeper = upgradekeeper.NewKeeper(skipUpgradeHeights, keys[upgradetypes.StoreKey], appCodec, homePath, app.BaseApp, authtypes.NewModuleAddress(govtypes.ModuleName).String())
+	app.IbcTransferMiddlewareKeeper = ibctransfermiddleware.NewKeeper(appCodec, keys[ibctransfermiddlewaretypes.StoreKey], authtypes.NewModuleAddress(govtypes.ModuleName).String(),
+		[]string{
+			"pica1ay9y5uns9khw2kzaqr3r33v2pkuptfnnunlt5x",
+			"pica14lz7gaw92valqjearnye4shex7zg2p05yfguqm",
+			"pica1r2zlh2xn85v8ljmwymnfrnsmdzjl7k6w9f2ja8",
+			"pica10556m38z4x6pqalr9rl5ytf3cff8q46nf36090",
+		})
 	app.TransferMiddlewarekeeper = transfermiddlewarekeeper.NewKeeper(
 		keys[transfermiddlewaretypes.StoreKey],
 		app.GetSubspace(transfermiddlewaretypes.ModuleName),
 		appCodec,
 		app.IBCKeeper.ChannelKeeper,
 		app.TransferKeeper,
 		app.BankKeeper,
+		&app.IbcTransferMiddlewareKeeper,
 		authtypes.NewModuleAddress(govtypes.ModuleName).String(),
 	)
 	app.AuthzKeeper = authzkeeper.NewKeeper(keys[authzkeeper.StoreKey], appCodec, app.MsgServiceRouter(), app.AccountKeeper)

app/keepers/keepers.go

@@ -303,6 +303,7 @@ func (appKeepers *AppKeepers) InitNormalKeepers(
 		&appKeepers.RatelimitKeeper,
 		&appKeepers.TransferKeeper,
 		appKeepers.BankKeeper,
+		&appKeepers.IbcTransferMiddlewareKeeper,
 		authorityAddress,
 	)
 

custom/ibc-transfer/keeper/msg_server.go

@@ -63,7 +63,7 @@ func (k msgServer) Transfer(goCtx context.Context, msg *types.MsgTransfer) (*typ
 
 			newAmount := msg.Token.Amount.Sub(charge)
 
-			if newAmount.IsPositive() {
+			if newAmount.IsPositive() && coin.Percentage != 0 {
 				percentageCharge := newAmount.QuoRaw(coin.Percentage)
 				newAmount = newAmount.Sub(percentageCharge)
 				charge = charge.Add(percentageCharge)

scripts/testnode.sh

@@ -17,24 +17,24 @@ DENOM=${2:-ppica}
 # remove existing daemon
 rm -rf ~/.banksy*
 
-centaurid config keyring-backend $KEYRING
-centaurid config chain-id $CHAINID
+picad config keyring-backend $KEYRING
+picad config chain-id $CHAINID
 
 # if $KEY exists it should be deleted
-echo "decorate bright ozone fork gallery riot bus exhaust worth way bone indoor calm squirrel merry zero scheme cotton until shop any excess stage laundry" | centaurid keys add $KEY --keyring-backend $KEYRING --algo $KEYALGO --recover
+echo "decorate bright ozone fork gallery riot bus exhaust worth way bone indoor calm squirrel merry zero scheme cotton until shop any excess stage laundry" | picad keys add $KEY --keyring-backend $KEYRING --algo $KEYALGO --recover
 
-centaurid init $MONIKER --chain-id $CHAINID
+picad init $MONIKER --chain-id $CHAINID
 
 update_test_genesis () {
     # update_test_genesis '.consensus_params["block"]["max_gas"]="100000000"'
     cat $HOME_DIR/config/genesis.json | jq "$1" > $HOME_DIR/config/tmp_genesis.json && mv $HOME_DIR/config/tmp_genesis.json $HOME_DIR/config/genesis.json
 }
 
 # Allocate genesis accounts (cosmos formatted addresses)
-centaurid add-genesis-account $KEY 100000000000000000000000000ppica --keyring-backend $KEYRING
+picad add-genesis-account $KEY 100000000000000000000000000ppica --keyring-backend $KEYRING
 
 # Sign genesis transaction
-centaurid gentx $KEY 10030009994127689ppica --keyring-backend $KEYRING --chain-id $CHAINID
+picad gentx $KEY 10030009994127689ppica --keyring-backend $KEYRING --chain-id $CHAINID
 
 update_test_genesis '.app_state["gov"]["params"]["voting_period"]="20s"'
 update_test_genesis '.app_state["mint"]["params"]["mint_denom"]="'$DENOM'"'
@@ -43,10 +43,10 @@ update_test_genesis '.app_state["crisis"]["constant_fee"]={"denom":"'$DENOM'","a
 update_test_genesis '.app_state["staking"]["params"]["bond_denom"]="'$DENOM'"'
 
 # Collect genesis tx
-centaurid collect-gentxs
+picad collect-gentxs
 
 # Run this to ensure everything worked and that the genesis file is setup correctly
-centaurid validate-genesis
+picad validate-genesis
 
 if [[ $1 == "pending" ]]; then
   echo "pending mode is on, please wait for the first block committed."
@@ -57,4 +57,4 @@ fi
 sed -i'' -e 's/max_body_bytes = /max_body_bytes = 1/g' ~/.banksy/config/config.toml
 
 # Start the node (remove the --pruning=nothing flag if historical queries are not needed)
-# centaurid start --pruning=nothing  --minimum-gas-prices=0.0001ppica --rpc.laddr tcp://0.0.0.0:26657
+picad start --pruning=nothing  --minimum-gas-prices=0.0001ppica --rpc.laddr tcp://0.0.0.0:26657

x/ibctransfermiddleware/keeper/keeper.go

@@ -64,3 +64,21 @@ func (k Keeper) GetParams(ctx sdk.Context) (p types.Params) {
 	k.cdc.MustUnmarshal(bz, &p)
 	return p
 }
+
+func (k Keeper) GetCoin(ctx sdk.Context, targetChannelID, denom string) *types.CoinItem {
+	params := k.GetParams(ctx)
+	channelFee := findChannelParams(params.ChannelFees, targetChannelID)
+	if channelFee == nil {
+		return nil
+	}
+	return findCoinByDenom(channelFee.AllowedTokens, denom)
+}
+
+func (k Keeper) GetChannelFeeAddress(ctx sdk.Context, targetChannelID string) string {
+	params := k.GetParams(ctx)
+	channelFee := findChannelParams(params.ChannelFees, targetChannelID)
+	if channelFee == nil {
+		return ""
+	}
+	return channelFee.FeeAddress
+}

x/transfermiddleware/ibc_middleware.go

@@ -127,6 +127,41 @@ func (im IBCMiddleware) OnTimeoutPacket(ctx sdk.Context, packet channeltypes.Pac
 		return err
 	}
 
+	denom := data.Denom
+	coin := im.keeper.IbcTransfermiddleware.GetCoin(ctx, packet.SourceChannel, denom)
+	сhannelFeeAddress := im.keeper.IbcTransfermiddleware.GetChannelFeeAddress(ctx, packet.SourceChannel)
+	if coin != nil {
+		amount := data.Amount
+		transferAmount, ok := sdk.NewIntFromString(amount)
+		if !ok {
+			return errors.Wrapf(transfertypes.ErrInvalidAmount, "unable to parse transfer amount: %s", amount)
+		}
+
+		// calculate the percentage charge
+		/*
+			coin.Percentage is 100 that means that we charge 1/100 of the transfer amount
+			coin.MinFee.Amount is the minimum fee that we charge
+			the new amount is the transfer amount minus the percentage charge and the minimum fee
+			transfer amount is a 99/100 of the original amount
+			so to get the fee we charge transferAmount.QuoRaw(coin.Percentage - 1) + coin.MinFee.Amount
+		*/
+
+		percentageCharge := sdk.NewInt(0)
+		if coin.Percentage > 1 {
+			percentageCharge = transferAmount.QuoRaw(coin.Percentage - 1)
+		}
+		percentageCharge = percentageCharge.Add(coin.MinFee.Amount)
+
+		fee_address, err := sdk.AccAddressFromBech32(сhannelFeeAddress)
+		if err != nil {
+			return errors.Wrapf(err, "failed to decode receiver address: %s", сhannelFeeAddress)
+		}
+
+		refund_fee := sdk.NewCoin(denom, percentageCharge)
+		im.keeper.RefundChannelCosmosFee(ctx, fee_address, sdk.AccAddress(data.Sender), []sdk.Coin{refund_fee})
+
+	}
+
 	return nil
 }
 

x/transfermiddleware/keeper/keeper.go

@@ -15,17 +15,18 @@ import (
 	porttypes "github.com/cosmos/ibc-go/v7/modules/core/05-port/types"
 	"github.com/cosmos/ibc-go/v7/modules/core/exported"
 
+	ibctransfermiddleware "github.com/notional-labs/composable/v6/x/ibctransfermiddleware/keeper"
 	"github.com/notional-labs/composable/v6/x/transfermiddleware/types"
 )
 
 type Keeper struct {
-	cdc            codec.BinaryCodec
-	storeKey       storetypes.StoreKey
-	paramSpace     paramtypes.Subspace
-	ICS4Wrapper    porttypes.ICS4Wrapper
-	bankKeeper     types.BankKeeper
-	transferKeeper types.TransferKeeper
-
+	cdc                   codec.BinaryCodec
+	storeKey              storetypes.StoreKey
+	paramSpace            paramtypes.Subspace
+	ICS4Wrapper           porttypes.ICS4Wrapper
+	bankKeeper            types.BankKeeper
+	transferKeeper        types.TransferKeeper
+	IbcTransfermiddleware *ibctransfermiddleware.Keeper
 	// the address capable of executing a AddParachainIBCTokenInfo and RemoveParachainIBCTokenInfo message. Typically, this
 	// should be the x/gov module account.
 	authority string
@@ -39,6 +40,7 @@ func NewKeeper(
 	ics4Wrapper porttypes.ICS4Wrapper,
 	transferKeeper types.TransferKeeper,
 	bankKeeper types.BankKeeper,
+	ibcTransfermiddleware *ibctransfermiddleware.Keeper,
 	authority string,
 ) Keeper {
 	// set KeyTable if it has not already been set
@@ -47,13 +49,14 @@ func NewKeeper(
 	}
 
 	return Keeper{
-		storeKey:       storeKey,
-		paramSpace:     paramSpace,
-		transferKeeper: transferKeeper,
-		bankKeeper:     bankKeeper,
-		cdc:            codec,
-		ICS4Wrapper:    ics4Wrapper,
-		authority:      authority,
+		storeKey:              storeKey,
+		paramSpace:            paramSpace,
+		transferKeeper:        transferKeeper,
+		bankKeeper:            bankKeeper,
+		cdc:                   codec,
+		ICS4Wrapper:           ics4Wrapper,
+		IbcTransfermiddleware: ibcTransfermiddleware,
+		authority:             authority,
 	}
 }
 
@@ -233,6 +236,14 @@ func (keeper Keeper) GetTotalEscrowedToken(ctx sdk.Context) (coins sdk.Coins) {
 	return coins
 }
 
+func (keeper Keeper) RefundChannelCosmosFee(ctx sdk.Context, sender, receiver sdk.AccAddress, amount sdk.Coins) error {
+	if err := keeper.bankKeeper.SendCoins(ctx, sender, receiver, amount); err != nil {
+		return errorsmod.Wrap(err, "failed to refund channel cosmos fee")
+	}
+
+	return nil
+}
+
 func (keeper Keeper) Logger(ctx sdk.Context) log.Logger {
 	return ctx.Logger().With("module", "x/"+exported.ModuleName+"-"+types.ModuleName)
 }