Merge pull request #8127 from Agoric/mfig-vibc-write-open-init

fix(vibc): accommodate ibc-go v3 breaking changes

golang/cosmos/x/vibc/ibc.go

@@ -228,7 +228,6 @@ type channelOpenAckEvent struct {
 	Event                 string                    `json:"event"` // channelOpenAck
 	PortID                string                    `json:"portID"`
 	ChannelID             string                    `json:"channelID"`
-	CounterpartyChannelID string                    `json:"counterpartyChannelID"`
 	CounterpartyVersion   string                    `json:"counterpartyVersion"`
 	Counterparty          channeltypes.Counterparty `json:"counterparty"`
 	ConnectionHops        []string                  `json:"connectionHops"`
@@ -247,12 +246,12 @@ func (im IBCModule) OnChanOpenAck(
 	// returns an empty channel object that we can still use without crashing.
 	channel, _ := im.keeper.GetChannel(ctx, portID, channelID)
 
+	channel.Counterparty.ChannelId = counterpartyChannelID
 	event := channelOpenAckEvent{
 		Type:                  "IBC_EVENT",
 		Event:                 "channelOpenAck",
 		PortID:                portID,
 		ChannelID:             channelID,
-		CounterpartyChannelID: counterpartyChannelID,
 		CounterpartyVersion:   counterpartyVersion,
 		Counterparty:          channel.Counterparty,
 		ConnectionHops:        channel.ConnectionHops,

golang/cosmos/x/vibc/keeper/keeper.go

@@ -92,13 +92,7 @@ func (k Keeper) ChanOpenInit(ctx sdk.Context, order channeltypes.Order, connecti
 		return err
 	}
 
-	// We need to emit a channel event to notify the relayer.
-	ctx.EventManager().EmitEvents(sdk.Events{
-		sdk.NewEvent(
-			sdk.EventTypeMessage,
-			sdk.NewAttribute(sdk.AttributeKeyModule, channeltypes.AttributeValueCategory),
-		),
-	})
+	k.channelKeeper.WriteOpenInitChannel(ctx, portID, channelID, order, connectionHops, counterparty, version)
 	return nil
 }
 
@@ -157,14 +151,6 @@ func (k Keeper) ChanCloseInit(ctx sdk.Context, portID, channelID string) error {
 	if err != nil {
 		return err
 	}
-
-	// We need to emit a channel event to notify the relayer.
-	ctx.EventManager().EmitEvents(sdk.Events{
-		sdk.NewEvent(
-			sdk.EventTypeMessage,
-			sdk.NewAttribute(sdk.AttributeKeyModule, channeltypes.AttributeValueCategory),
-		),
-	})
 	return nil
 }
 

golang/cosmos/x/vibc/types/expected_keepers.go

@@ -16,7 +16,8 @@ type ChannelKeeper interface {
 	WriteAcknowledgement(ctx sdk.Context, channelCap *capability.Capability, packet ibcexported.PacketI, acknowledgement ibcexported.Acknowledgement) error
 	ChanOpenInit(ctx sdk.Context, order channel.Order, connectionHops []string, portID string,
 		portCap *capability.Capability, counterparty channel.Counterparty, version string) (string, *capability.Capability, error)
-
+	WriteOpenInitChannel(ctx sdk.Context, portID, channelID string, order channel.Order,
+		connectionHops []string, counterparty channel.Counterparty, version string)
 	ChanCloseInit(ctx sdk.Context, portID, channelID string, chanCap *capability.Capability) error
 	TimeoutExecuted(ctx sdk.Context, channelCap *capability.Capability, packet ibcexported.PacketI) error
 }

packages/SwingSet/docs/networking.md

@@ -120,7 +120,7 @@ You can omit any of the methods and those events will simply be ignored. All the
 `onReceive()` is the most important method. Each time the remote end sends a packet, your `onReceive()` method will be called with the data inside that packet (currently as a String due to inter-vat marshalling limitations, but ideally as an ArrayBuffer with a custom `toString(encoding='latin1')` method so that it can contain arbitrary bytes).
 
 The return value of `onReceive()` is nominally a Promise for ACK data of the message (that will eventually appear on the other side as resolution of the Promise returned by `connection.send()`).
-For IBC, this Promise must be resolved within the same block as receiving the message, and if it does not resolve (or resolves to an empty value `''`, which is not supported by [Cosmos ibc-go](https://github.com/cosmos/ibc-go)) then the implementation will automatically send a trivial `'\x01'` ACK. This behavior may be different for other network implementations.
+For IBC, if the ACK data settles to an empty value `''` then the implementation will automatically send a trivial `'\x01'` ACK, because empty ACKs are not supported by [Cosmos ibc-go](https://github.com/cosmos/ibc-go). This behavior may be different for other network implementations.
 It is recommended to avoid ACK data where possible.
 
 ## Closing the Connection