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ibc_middleware.go
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ibc_middleware.go
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package module
import (
"encoding/json"
errorsmod "cosmossdk.io/errors"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
capabilitytypes "github.com/cosmos/cosmos-sdk/x/capability/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/provenance-io/provenance/internal/ibc"
"github.com/provenance-io/provenance/x/ibcratelimit"
"github.com/provenance-io/provenance/x/ibcratelimit/keeper"
)
var (
_ porttypes.Middleware = &IBCMiddleware{}
)
// IBCMiddleware is the middleware used by the module.
type IBCMiddleware struct {
app porttypes.IBCModule
keeper *keeper.Keeper
channel porttypes.ICS4Wrapper
}
// NewIBCMiddleware Creates a new IBCMiddleware.
func NewIBCMiddleware(app porttypes.IBCModule,
channel porttypes.ICS4Wrapper,
keeper *keeper.Keeper) IBCMiddleware {
return IBCMiddleware{
app: app,
keeper: keeper,
channel: channel,
}
}
// WithIBCModule Updates the Middleware's baseapp and returns it.
func (im *IBCMiddleware) WithIBCModule(app porttypes.IBCModule) *IBCMiddleware {
im.app = app
return im
}
// OnChanOpenInit implements the IBCModule interface
func (im *IBCMiddleware) OnChanOpenInit(ctx sdk.Context,
order channeltypes.Order,
connectionHops []string,
portID string,
channelID string,
channelCap *capabilitytypes.Capability,
counterparty channeltypes.Counterparty,
version string,
) (string, error) {
return im.app.OnChanOpenInit(
ctx,
order,
connectionHops,
portID,
channelID,
channelCap,
counterparty,
version,
)
}
// OnChanOpenTry implements the IBCModule interface
func (im *IBCMiddleware) OnChanOpenTry(
ctx sdk.Context,
order channeltypes.Order,
connectionHops []string,
portID,
channelID string,
channelCap *capabilitytypes.Capability,
counterparty channeltypes.Counterparty,
counterpartyVersion string,
) (string, error) {
return im.app.OnChanOpenTry(ctx, order, connectionHops, portID, channelID, channelCap, counterparty, counterpartyVersion)
}
// OnChanOpenAck implements the IBCModule interface
func (im *IBCMiddleware) OnChanOpenAck(
ctx sdk.Context,
portID,
channelID string,
counterpartyChannelID string,
counterpartyVersion string,
) error {
// Here we can add initial limits when a new channel is open. For now, they can be added manually on the contract
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 {
// Here we can add initial limits when a new channel is open. For now, they can be added manually on the contract
return im.app.OnChanOpenConfirm(ctx, portID, channelID)
}
// OnChanCloseInit implements the IBCModule interface
func (im *IBCMiddleware) OnChanCloseInit(
ctx sdk.Context,
portID,
channelID string,
) error {
// Here we can remove the limits when a new channel is closed. For now, they can remove them manually on the contract
return im.app.OnChanCloseInit(ctx, portID, channelID)
}
// OnChanCloseConfirm implements the IBCModule interface
func (im *IBCMiddleware) OnChanCloseConfirm(
ctx sdk.Context,
portID,
channelID string,
) error {
// Here we can remove the limits when a new channel is closed. For now, they can remove them manually on the contract
return im.app.OnChanCloseConfirm(ctx, portID, channelID)
}
// OnRecvPacket implements the IBCModule interface
func (im *IBCMiddleware) OnRecvPacket(
ctx sdk.Context,
packet channeltypes.Packet,
relayer sdk.AccAddress,
) exported.Acknowledgement {
if err := ibcratelimit.ValidateReceiverAddress(packet); err != nil {
return ibc.NewEmitErrorAcknowledgement(ctx, ibcratelimit.ErrBadMessage, err.Error())
}
if !im.keeper.IsContractConfigured(ctx) {
// The contract has not been configured. Continue as usual
return im.app.OnRecvPacket(ctx, packet, relayer)
}
err := im.keeper.CheckAndUpdateRateLimits(ctx, "recv_packet", packet)
if err != nil {
return ibc.NewEmitErrorAcknowledgement(ctx, err)
}
// if this returns an Acknowledgement that isn't successful, all state changes are discarded
return im.app.OnRecvPacket(ctx, packet, relayer)
}
// OnAcknowledgementPacket implements the IBCModule interface
func (im *IBCMiddleware) OnAcknowledgementPacket(
ctx sdk.Context,
packet channeltypes.Packet,
acknowledgement []byte,
relayer sdk.AccAddress,
) error {
var ack channeltypes.Acknowledgement
if err := json.Unmarshal(acknowledgement, &ack); err != nil {
return errorsmod.Wrapf(sdkerrors.ErrUnknownRequest, "cannot unmarshal ICS-20 transfer packet acknowledgement: %v", err)
}
if ibc.IsAckError(acknowledgement) {
err := im.keeper.RevertSentPacket(ctx, packet) // If there is an error here we should still handle the ack
if err != nil {
eventError := ctx.EventManager().EmitTypedEvent(ibcratelimit.NewEventAckRevertFailure(
ibcratelimit.ModuleName,
string(packet.GetData()),
string(acknowledgement),
))
if eventError != nil {
ctx.Logger().Error("unable to emit AckRevertFailure event", "err", eventError)
}
}
}
return im.app.OnAcknowledgementPacket(ctx, packet, acknowledgement, relayer)
}
// OnTimeoutPacket implements the IBCModule interface
func (im *IBCMiddleware) OnTimeoutPacket(
ctx sdk.Context,
packet channeltypes.Packet,
relayer sdk.AccAddress,
) error {
err := im.keeper.RevertSentPacket(ctx, packet) // If there is an error here we should still handle the timeout
if err != nil {
eventError := ctx.EventManager().EmitTypedEvent(ibcratelimit.NewEventTimeoutRevertFailure(
ibcratelimit.ModuleName,
string(packet.GetData()),
))
if eventError != nil {
ctx.Logger().Error("unable to emit TimeoutRevertFailure event", "err", eventError)
}
}
return im.app.OnTimeoutPacket(ctx, packet, relayer)
}
// SendPacket implements the ICS4 interface and is called when sending packets.
// This method retrieves the contract from the middleware's parameters and checks if the limits have been exceeded for
// the current transfer, in which case it returns an error preventing the IBC send from taking place.
// If the contract param is not configured, or the contract doesn't have a configuration for the (channel+denom) being
// used, transfers are not prevented and handled by the wrapped IBC app
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) {
if !im.keeper.IsContractConfigured(ctx) {
// The contract has not been configured. Continue as usual
return im.channel.SendPacket(ctx, chanCap, sourcePort, sourceChannel, timeoutHeight, timeoutTimestamp, data)
}
// We need the full packet so the contract can process it. If it can't be cast to a channeltypes.Packet, this
// should fail. The only reason that would happen is if another middleware is modifying the packet, though. In
// that case we can modify the middleware order or change this cast so we have all the data we need.
packet := channeltypes.NewPacket(
data,
sequence,
sourcePort,
sourceChannel,
"",
"",
timeoutHeight,
timeoutTimestamp,
)
err = im.keeper.CheckAndUpdateRateLimits(ctx, "send_packet", packet)
if err != nil {
return 0, errorsmod.Wrap(err, "rate limit SendPacket failed to authorize transfer")
}
return im.channel.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.channel.WriteAcknowledgement(ctx, chanCap, packet, ack)
}
// GetAppVersion Obtains the version of the ICS4 Wrapper.
func (im *IBCMiddleware) GetAppVersion(ctx sdk.Context, portID, channelID string) (string, bool) {
return im.channel.GetAppVersion(ctx, portID, channelID)
}