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ibc_middleware.go
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ibc_middleware.go
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// Copyright 2022 Evmos Foundation
// This file is part of the Evmos Network packages.
//
// Evmos is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The Evmos packages are distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the Evmos packages. If not, see https://github.com/evmos/evmos/blob/main/LICENSE
package recovery
import (
sdk "github.com/cosmos/cosmos-sdk/types"
capabilitytypes "github.com/cosmos/cosmos-sdk/x/capability/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"
clienttypes "github.com/cosmos/ibc-go/v6/modules/core/02-client/types"
"github.com/evmos/evmos/v12/ibc"
"github.com/evmos/evmos/v12/x/recovery/keeper"
)
var _ porttypes.Middleware = &IBCMiddleware{}
// IBCMiddleware implements the ICS26 callbacks for the transfer middleware given
// the recovery keeper and the underlying application.
type IBCMiddleware struct {
*ibc.Module
keeper keeper.Keeper
}
// 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.
// If the acknowledgement fails, this callback will default to the ibc-core
// packet callback.
func (im IBCMiddleware) OnRecvPacket(
ctx sdk.Context,
packet channeltypes.Packet,
relayer sdk.AccAddress,
) exported.Acknowledgement {
ack := im.Module.OnRecvPacket(ctx, packet, relayer)
// return if the acknowledgement is an error ACK
if !ack.Success() {
return ack
}
return im.keeper.OnRecvPacket(ctx, packet, ack)
}
// SendPacket implements the ICS4 Wrapper interface
func (im IBCMiddleware) SendPacket(
ctx sdk.Context,
chanCap *capabilitytypes.Capability,
sourcePort string,
sourceChannel string,
timeoutHeight clienttypes.Height,
timeoutTimestamp uint64,
data []byte,
) (sequence uint64, err error) {
return im.keeper.SendPacket(
ctx,
chanCap,
sourcePort,
sourceChannel,
timeoutHeight,
timeoutTimestamp,
data,
)
}
// WriteAcknowledgement implements the ICS4 Wrapper interface
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)
}
// GetAppVersion implements the ICS4 Wrapper interface
func (im IBCMiddleware) GetAppVersion(
ctx sdk.Context,
portID,
channelID string,
) (string, bool) {
return im.keeper.GetAppVersion(ctx, portID, channelID)
}