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path.go
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path.go
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package ibctesting
import (
"bytes"
"fmt"
channeltypes "github.com/cosmos/ibc-go/v7/modules/core/04-channel/types"
ibctesting "github.com/cosmos/ibc-go/v7/testing"
)
// Path contains two endpoints representing two chains connected over IBC
type Path struct {
EndpointA *Endpoint
EndpointB *Endpoint
}
// NewPath constructs an endpoint for each chain using the default values
// for the endpoints. Each endpoint is updated to have a pointer to the
// counterparty endpoint.
func NewPath(chainA, chainB *ibctesting.TestChain) *Path {
endpointA := NewDefaultEndpoint(chainA)
endpointB := NewDefaultEndpoint(chainB)
endpointA.Counterparty = endpointB
endpointB.Counterparty = endpointA
return &Path{
EndpointA: endpointA,
EndpointB: endpointB,
}
}
// SetChannelOrdered sets the channel order for both endpoints to ORDERED.
func (path *Path) SetChannelOrdered() {
path.EndpointA.ChannelConfig.Order = channeltypes.ORDERED
path.EndpointB.ChannelConfig.Order = channeltypes.ORDERED
}
// RelayPacket attempts to relay the packet first on EndpointA and then on EndpointB
// if EndpointA does not contain a packet commitment for that packet. An error is returned
// if a relay step fails or the packet commitment does not exist on either endpoint.
func (path *Path) RelayPacket(packet channeltypes.Packet) error {
pc := path.EndpointA.Chain.App.GetIBCKeeper().ChannelKeeper.GetPacketCommitment(path.EndpointA.Chain.GetContext(), packet.GetSourcePort(), packet.GetSourceChannel(), packet.GetSequence())
if bytes.Equal(pc, channeltypes.CommitPacket(path.EndpointA.Chain.App.AppCodec(), packet)) {
// packet found, relay from A to B
if err := path.EndpointB.UpdateClient(); err != nil {
return err
}
res, err := path.EndpointB.RecvPacketWithResult(packet)
if err != nil {
return err
}
ack, err := ibctesting.ParseAckFromEvents(res.GetEvents())
if err != nil {
return err
}
return path.EndpointA.AcknowledgePacket(packet, ack)
}
pc = path.EndpointB.Chain.App.GetIBCKeeper().ChannelKeeper.GetPacketCommitment(path.EndpointB.Chain.GetContext(), packet.GetSourcePort(), packet.GetSourceChannel(), packet.GetSequence())
if bytes.Equal(pc, channeltypes.CommitPacket(path.EndpointB.Chain.App.AppCodec(), packet)) {
// packet found, relay B to A
if err := path.EndpointA.UpdateClient(); err != nil {
return err
}
res, err := path.EndpointA.RecvPacketWithResult(packet)
if err != nil {
return err
}
ack, err := ibctesting.ParseAckFromEvents(res.GetEvents())
if err != nil {
return err
}
return path.EndpointB.AcknowledgePacket(packet, ack)
}
return fmt.Errorf("packet commitment does not exist on either endpoint for provided packet")
}