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ibc_middleware.go
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ibc_middleware.go
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package transfer
import (
"fmt"
errorsmod "cosmossdk.io/errors"
sdkmath "cosmossdk.io/math"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
capabilitytypes "github.com/cosmos/cosmos-sdk/x/capability/types"
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"
"github.com/cosmos/ibc-go/v6/modules/core/exported"
"github.com/functionx/fx-core/v4/x/ibc"
"github.com/functionx/fx-core/v4/x/ibc/applications/transfer/keeper"
"github.com/functionx/fx-core/v4/x/ibc/applications/transfer/types"
)
var _ porttypes.Middleware = &IBCMiddleware{}
// IBCMiddleware implements the ICS26 interface for transfer given the transfer keeper.
type IBCMiddleware struct {
*ibc.Module
keeper keeper.Keeper
}
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.keeper.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.keeper.WriteAcknowledgement(ctx, chanCap, packet, ack)
}
func (im IBCMiddleware) GetAppVersion(ctx sdk.Context, portID, channelID string) (string, bool) {
return im.keeper.GetAppVersion(ctx, portID, channelID)
}
// NewIBCMiddleware creates a new IBCMiddleware given the keeper and underlying application
func NewIBCMiddleware(k keeper.Keeper, app porttypes.IBCModule) IBCMiddleware {
return IBCMiddleware{
Module: ibc.NewModule(app),
keeper: k,
}
}
// OnRecvPacket implements the IBCModule interface
func (im IBCMiddleware) OnRecvPacket(
ctx sdk.Context,
packet channeltypes.Packet,
_ sdk.AccAddress,
) exported.Acknowledgement {
ack := channeltypes.NewResultAcknowledgement([]byte{byte(1)})
var data types.FungibleTokenPacketData
var ackErr error
if err := types.ModuleCdc.UnmarshalJSON(packet.GetData(), &data); err != nil {
ackErr = sdkerrors.ErrInvalidType.Wrap("cannot unmarshal ICS-20 transfer packet data")
ack = channeltypes.NewErrorAcknowledgement(ackErr)
}
// only attempt the application logic if the packet data
// was successfully decoded
if ack.Success() {
if len(data.GetFee()) == 0 {
data.Fee = sdkmath.ZeroInt().String()
}
if err := im.keeper.OnRecvPacket(ctx, packet, data); err != nil {
ack = channeltypes.NewErrorAcknowledgement(err)
ackErr = err
}
}
event := sdk.NewEvent(
transfertypes.EventTypePacket,
sdk.NewAttribute(sdk.AttributeKeyModule, types.ModuleName),
sdk.NewAttribute(sdk.AttributeKeySender, data.Sender),
sdk.NewAttribute(transfertypes.AttributeKeyReceiver, data.Receiver),
sdk.NewAttribute(transfertypes.AttributeKeyDenom, data.Denom),
sdk.NewAttribute(transfertypes.AttributeKeyAmount, data.Amount),
sdk.NewAttribute(transfertypes.AttributeKeyMemo, data.Memo),
sdk.NewAttribute(transfertypes.AttributeKeyAckSuccess, fmt.Sprintf("%t", ack.Success())),
)
if ackErr != nil {
event = event.AppendAttributes(sdk.NewAttribute(types.AttributeKeyRecvError, ackErr.Error()))
}
ctx.EventManager().EmitEvent(event)
// NOTE: acknowledgement will be written synchronously during IBC handler execution.
return ack
}
// OnAcknowledgementPacket implements the IBCModule interface
func (im IBCMiddleware) OnAcknowledgementPacket(
ctx sdk.Context,
packet channeltypes.Packet,
acknowledgement []byte,
_ sdk.AccAddress,
) error {
var ack channeltypes.Acknowledgement
if err := types.ModuleCdc.UnmarshalJSON(acknowledgement, &ack); err != nil {
return errorsmod.Wrapf(sdkerrors.ErrUnknownRequest, "cannot unmarshal ICS-20 transfer packet acknowledgement: %v", err)
}
var data types.FungibleTokenPacketData
if err := types.ModuleCdc.UnmarshalJSON(packet.GetData(), &data); err != nil {
return errorsmod.Wrapf(sdkerrors.ErrUnknownRequest, "cannot unmarshal ICS-20 transfer packet data: %s", err.Error())
}
if err := im.keeper.OnAcknowledgementPacket(ctx, packet, data, ack); err != nil {
return err
}
ctx.EventManager().EmitEvent(sdk.NewEvent(
transfertypes.EventTypePacket,
sdk.NewAttribute(sdk.AttributeKeyModule, types.ModuleName),
sdk.NewAttribute(sdk.AttributeKeySender, data.Sender),
sdk.NewAttribute(transfertypes.AttributeKeyReceiver, data.Receiver),
sdk.NewAttribute(transfertypes.AttributeKeyDenom, data.Denom),
sdk.NewAttribute(transfertypes.AttributeKeyAmount, data.Amount),
sdk.NewAttribute(transfertypes.AttributeKeyMemo, data.Memo),
sdk.NewAttribute(transfertypes.AttributeKeyAck, ack.String()),
))
switch resp := ack.Response.(type) {
case *channeltypes.Acknowledgement_Result:
ctx.EventManager().EmitEvent(sdk.NewEvent(
transfertypes.EventTypePacket,
sdk.NewAttribute(transfertypes.AttributeKeyAckSuccess, string(resp.Result)),
))
case *channeltypes.Acknowledgement_Error:
ctx.EventManager().EmitEvent(sdk.NewEvent(
transfertypes.EventTypePacket,
sdk.NewAttribute(transfertypes.AttributeKeyAckError, resp.Error),
))
}
return nil
}
// OnTimeoutPacket implements the IBCModule interface
func (im IBCMiddleware) OnTimeoutPacket(
ctx sdk.Context,
packet channeltypes.Packet,
_ sdk.AccAddress,
) error {
var data types.FungibleTokenPacketData
if err := types.ModuleCdc.UnmarshalJSON(packet.GetData(), &data); err != nil {
return errorsmod.Wrapf(sdkerrors.ErrUnknownRequest, "cannot unmarshal ICS-20 transfer packet data: %s", err.Error())
}
// refund tokens
if err := im.keeper.OnTimeoutPacket(ctx, packet, data); err != nil {
return err
}
ctx.EventManager().EmitEvent(sdk.NewEvent(
transfertypes.EventTypeTimeout,
sdk.NewAttribute(sdk.AttributeKeyModule, types.ModuleName),
sdk.NewAttribute(transfertypes.AttributeKeyRefundReceiver, data.Sender),
sdk.NewAttribute(transfertypes.AttributeKeyRefundDenom, data.Denom),
sdk.NewAttribute(transfertypes.AttributeKeyRefundAmount, data.Amount),
sdk.NewAttribute(transfertypes.AttributeKeyMemo, data.Memo),
))
return nil
}