/
ibc_middleware.go
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/
ibc_middleware.go
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package ibcrouter
import (
"fmt"
"time"
errorsmod "cosmossdk.io/errors"
sdkmath "cosmossdk.io/math"
sdk "github.com/cosmos/cosmos-sdk/types"
errortypes "github.com/cosmos/cosmos-sdk/types/errors"
capabilitytypes "github.com/cosmos/cosmos-sdk/x/capability/types"
transferkeeper "github.com/cosmos/ibc-go/v6/modules/apps/transfer/keeper"
transfertypes "github.com/cosmos/ibc-go/v6/modules/apps/transfer/types"
clienttypes "github.com/cosmos/ibc-go/v6/modules/core/02-client/types"
channeltypes "github.com/cosmos/ibc-go/v6/modules/core/04-channel/types"
porttypes "github.com/cosmos/ibc-go/v6/modules/core/05-port/types"
host "github.com/cosmos/ibc-go/v6/modules/core/24-host"
"github.com/cosmos/ibc-go/v6/modules/core/exported"
"github.com/tendermint/tendermint/libs/log"
fxtransfertypes "github.com/functionx/fx-core/v5/x/ibc/applications/transfer/types"
"github.com/functionx/fx-core/v5/x/ibc/ibcrouter/parser"
"github.com/functionx/fx-core/v5/x/ibc/ibcrouter/types"
)
const (
ForwardPacketTimeHour time.Duration = 12
)
var _ porttypes.Middleware = &IBCMiddleware{}
// IBCMiddleware implements the ICS26 interface for transfer given the transfer keeper.
type IBCMiddleware struct {
app porttypes.IBCModule
transferKeeper types.TransferKeeper
ics4Wrapper porttypes.ICS4Wrapper
}
// ICS 30 callbacks
// OnChanOpenInit implements the IBCModule interface
func (im IBCMiddleware) OnChanOpenInit(ctx sdk.Context, order channeltypes.Order, connectionHops []string, portID string, channelID string, chanCap *capabilitytypes.Capability, counterparty channeltypes.Counterparty, version string) (string, error) {
return im.app.OnChanOpenInit(ctx, order, connectionHops, portID, channelID, chanCap, counterparty, version)
}
// OnChanOpenTry implements the IBCModule interface
func (im IBCMiddleware) OnChanOpenTry(ctx sdk.Context, order channeltypes.Order, connectionHops []string, portID, channelID string, chanCap *capabilitytypes.Capability, counterparty channeltypes.Counterparty, counterpartyVersion string,
) (version string, err error) {
return im.app.OnChanOpenTry(ctx, order, connectionHops, portID, channelID,
chanCap, counterparty, counterpartyVersion)
}
// OnChanOpenAck implements the IBCModule interface
func (im IBCMiddleware) OnChanOpenAck(ctx sdk.Context, portID, channelID string, counterpartyChannelID string, counterpartyVersion string) error {
return im.app.OnChanOpenAck(ctx, portID, channelID, counterpartyChannelID, counterpartyVersion)
}
// OnChanOpenConfirm implements the IBCModule interface
func (im IBCMiddleware) OnChanOpenConfirm(ctx sdk.Context, portID, channelID string) error {
return im.app.OnChanOpenConfirm(ctx, portID, channelID)
}
// OnChanCloseInit implements the IBCModule interface
func (im IBCMiddleware) OnChanCloseInit(ctx sdk.Context, portID, channelID string) error {
return im.app.OnChanCloseInit(ctx, portID, channelID)
}
// OnChanCloseConfirm implements the IBCModule interface
func (im IBCMiddleware) OnChanCloseConfirm(ctx sdk.Context, portID, channelID string) error {
return im.app.OnChanCloseConfirm(ctx, portID, channelID)
}
// NewIBCMiddleware creates a new IBCMiddleware given the keeper and underlying application
func NewIBCMiddleware(app porttypes.IBCModule, ics4Wrapper porttypes.ICS4Wrapper, transferKeeper transferkeeper.Keeper) IBCMiddleware {
return IBCMiddleware{
app: app,
transferKeeper: transferKeeper,
ics4Wrapper: ics4Wrapper,
}
}
// Logger returns a module-specific logger.
func (im IBCMiddleware) Logger(ctx sdk.Context) log.Logger {
return ctx.Logger().With("module", "x/"+host.ModuleName+"-"+"ibcroutermiddleware")
}
// OnRecvPacket implements the IBCModule interface
func (im IBCMiddleware) OnRecvPacket(
ctx sdk.Context,
packet channeltypes.Packet,
relayer sdk.AccAddress,
) exported.Acknowledgement {
var data fxtransfertypes.FungibleTokenPacketData
if err := fxtransfertypes.ModuleCdc.UnmarshalJSON(packet.GetData(), &data); err != nil {
return channeltypes.NewErrorAcknowledgement(fmt.Errorf("cannot unmarshal ICS-20 transfer packet data"))
}
// check the packet has router
if len(data.Router) > 0 {
return im.app.OnRecvPacket(ctx, packet, relayer)
}
ack, err := handlerForwardTransferPacket(ctx, im, packet, data.ToIBCPacketData(), relayer)
if err != nil {
ack = channeltypes.NewErrorAcknowledgement(err)
}
if err != nil {
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeRouter,
sdk.NewAttribute(types.AttributeKeyRouteError, err.Error()),
))
}
return ack
}
func (im IBCMiddleware) OnAcknowledgementPacket(
ctx sdk.Context,
packet channeltypes.Packet,
acknowledgement []byte,
relayer sdk.AccAddress,
) error {
return im.app.OnAcknowledgementPacket(ctx, packet, acknowledgement, relayer)
}
func (im IBCMiddleware) OnTimeoutPacket(
ctx sdk.Context,
packet channeltypes.Packet,
relayer sdk.AccAddress,
) error {
return im.app.OnTimeoutPacket(ctx, packet, relayer)
}
func (im IBCMiddleware) SendPacket(
ctx sdk.Context,
chanCap *capabilitytypes.Capability,
sourcePort string,
sourceChannel string,
timeoutHeight clienttypes.Height,
timeoutTimestamp uint64,
data []byte,
) (uint64, error) {
return im.ics4Wrapper.SendPacket(ctx, chanCap, sourcePort, sourceChannel, timeoutHeight, timeoutTimestamp, data)
}
func (im IBCMiddleware) WriteAcknowledgement(ctx sdk.Context, chanCap *capabilitytypes.Capability, packet exported.PacketI, ack exported.Acknowledgement) error {
return im.ics4Wrapper.WriteAcknowledgement(ctx, chanCap, packet, ack)
}
func (im IBCMiddleware) GetAppVersion(ctx sdk.Context, portID, channelID string) (string, bool) {
return im.ics4Wrapper.GetAppVersion(ctx, portID, channelID)
}
func handlerForwardTransferPacket(ctx sdk.Context, im IBCMiddleware, packet channeltypes.Packet, data transfertypes.FungibleTokenPacketData, relayer sdk.AccAddress) (exported.Acknowledgement, error) {
// parse out any forwarding info
parsedReceiver, err := parser.ParseReceiverData(data.Receiver)
if err != nil {
return nil, err
}
if !parsedReceiver.ShouldForward {
return im.app.OnRecvPacket(ctx, packet, relayer), nil
}
newData := data
newData.Receiver = parsedReceiver.HostAccAddr.String()
newPacket := packet
newPacket.Data = newData.GetBytes()
ack := im.app.OnRecvPacket(ctx, newPacket, relayer)
if ack.Success() {
// recalculate denom, skip checks that were already done in app.OnRecvPacket
denom := GetDenomByIBCPacket(packet.GetSourcePort(), packet.GetSourceChannel(), packet.GetDestPort(), packet.GetDestChannel(), newData.GetDenom())
// parse the transfer amount
transferAmount, ok := sdkmath.NewIntFromString(data.Amount)
if !ok {
return nil, errorsmod.Wrapf(transfertypes.ErrInvalidAmount, "unable to parse forward transfer amount (%s) into sdkmath.Int", data.Amount)
}
token := sdk.NewCoin(denom, transferAmount)
msgTransfer := transfertypes.NewMsgTransfer(
parsedReceiver.Port,
parsedReceiver.Channel,
token,
parsedReceiver.HostAccAddr.String(),
parsedReceiver.Destination,
clienttypes.Height{},
uint64(ctx.BlockTime().Add(ForwardPacketTimeHour*time.Hour).UnixNano()),
"",
)
msgTransfer.Memo = newData.Memo
// send tokens to destination
if _, err = im.transferKeeper.Transfer(sdk.WrapSDKContext(ctx), msgTransfer); err != nil {
return nil, errorsmod.Wrapf(errortypes.ErrInsufficientFunds, err.Error())
}
}
return ack, nil
}
func GetDenomByIBCPacket(sourcePort, sourceChannel, destPort, destChannel, packetDenom string) string {
var denom string
if transfertypes.ReceiverChainIsSource(sourcePort, sourceChannel, packetDenom) {
voucherPrefix := transfertypes.GetDenomPrefix(sourcePort, sourceChannel)
unPrefixedDenom := packetDenom[len(voucherPrefix):]
// coin denomination used in sending from the escrow address
denom = unPrefixedDenom
// The denomination used to send the coins is either the native denom or the hash of the path
// if the denomination is not native.
denomTrace := transfertypes.ParseDenomTrace(unPrefixedDenom)
if denomTrace.Path != "" {
denom = denomTrace.IBCDenom()
}
} else {
// since SendPacket did not prefix the denomination, we must prefix denomination here
sourcePrefix := transfertypes.GetDenomPrefix(destPort, destChannel)
// NOTE: sourcePrefix contains the trailing "/"
prefixedDenom := sourcePrefix + packetDenom
// construct the denomination trace from the full raw denomination
denom = transfertypes.ParseDenomTrace(prefixedDenom).IBCDenom()
}
return denom
}