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module_ibc.go
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module_ibc.go
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package oracle
import (
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"
channeltypes "github.com/cosmos/ibc-go/v7/modules/core/04-channel/types"
porttypes "github.com/cosmos/ibc-go/v7/modules/core/05-port/types"
host "github.com/cosmos/ibc-go/v7/modules/core/24-host"
ibcexported "github.com/cosmos/ibc-go/v7/modules/core/exported"
"github.com/elys-network/elys/x/oracle/keeper"
"github.com/elys-network/elys/x/oracle/types"
)
type IBCModule struct {
keeper keeper.Keeper
}
func NewIBCModule(k keeper.Keeper) IBCModule {
return IBCModule{
keeper: k,
}
}
// OnChanOpenInit implements the IBCModule interface
func (im IBCModule) OnChanOpenInit(
ctx sdk.Context,
order channeltypes.Order,
connectionHops []string,
portID string,
channelID string,
chanCap *capabilitytypes.Capability,
counterparty channeltypes.Counterparty,
version string,
) (string, error) {
// Require portID is the portID module is bound to
boundPort := im.keeper.GetPort(ctx)
if boundPort != portID {
return "", errorsmod.Wrapf(porttypes.ErrInvalidPort, "invalid port: %s, expected %s", portID, boundPort)
}
if version != types.Version {
return "", errorsmod.Wrapf(types.ErrInvalidVersion, "got %s, expected %s", version, types.Version)
}
// Claim channel capability passed back by IBC module
if err := im.keeper.ClaimCapability(ctx, chanCap, host.ChannelCapabilityPath(portID, channelID)); err != nil {
return "", err
}
return version, nil
}
// OnChanOpenTry implements the IBCModule interface
func (im IBCModule) OnChanOpenTry(
ctx sdk.Context,
order channeltypes.Order,
connectionHops []string,
portID,
channelID string,
chanCap *capabilitytypes.Capability,
counterparty channeltypes.Counterparty,
counterpartyVersion string,
) (string, error) {
// Require portID is the portID module is bound to
boundPort := im.keeper.GetPort(ctx)
if boundPort != portID {
return "", errorsmod.Wrapf(porttypes.ErrInvalidPort, "invalid port: %s, expected %s", portID, boundPort)
}
if counterpartyVersion != types.Version {
return "", errorsmod.Wrapf(types.ErrInvalidVersion, "invalid counterparty version: got: %s, expected %s", counterpartyVersion, types.Version)
}
// Module may have already claimed capability in OnChanOpenInit in the case of crossing hellos
// (ie chainA and chainB both call ChanOpenInit before one of them calls ChanOpenTry)
// If module can already authenticate the capability then module already owns it so we don't need to claim
// Otherwise, module does not have channel capability and we must claim it from IBC
if !im.keeper.AuthenticateCapability(ctx, chanCap, host.ChannelCapabilityPath(portID, channelID)) {
// Only claim channel capability passed back by IBC module if we do not already own it
if err := im.keeper.ClaimCapability(ctx, chanCap, host.ChannelCapabilityPath(portID, channelID)); err != nil {
return "", err
}
}
return types.Version, nil
}
// OnChanOpenAck implements the IBCModule interface
func (im IBCModule) OnChanOpenAck(
ctx sdk.Context,
portID,
channelID string,
_,
counterpartyVersion string,
) error {
if counterpartyVersion != types.Version {
return errorsmod.Wrapf(types.ErrInvalidVersion, "invalid counterparty version: %s, expected %s", counterpartyVersion, types.Version)
}
return nil
}
// OnChanOpenConfirm implements the IBCModule interface
func (im IBCModule) OnChanOpenConfirm(
ctx sdk.Context,
portID,
channelID string,
) error {
return nil
}
// OnChanCloseInit implements the IBCModule interface
func (im IBCModule) OnChanCloseInit(
ctx sdk.Context,
portID,
channelID string,
) error {
// Disallow user-initiated channel closing for channels
return errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "user cannot close channel")
}
// OnChanCloseConfirm implements the IBCModule interface
func (im IBCModule) OnChanCloseConfirm(
ctx sdk.Context,
portID,
channelID string,
) error {
return nil
}
// OnRecvPacket implements the IBCModule interface
func (im IBCModule) OnRecvPacket(
ctx sdk.Context,
modulePacket channeltypes.Packet,
relayer sdk.AccAddress,
) ibcexported.Acknowledgement {
var ack channeltypes.Acknowledgement
oracleAck, err := im.handleOraclePacket(ctx, modulePacket)
if err != nil {
return channeltypes.NewErrorAcknowledgement(errorsmod.Wrap(sdkerrors.ErrUnknownRequest, "cannot unmarshal packet data: "+err.Error()))
} else if ack != oracleAck {
return oracleAck
}
return ack
}
// OnAcknowledgementPacket implements the IBCModule interface
func (im IBCModule) OnAcknowledgementPacket(
ctx sdk.Context,
modulePacket channeltypes.Packet,
acknowledgement []byte,
relayer sdk.AccAddress,
) error {
var ack channeltypes.Acknowledgement
if err := types.ModuleCdc.UnmarshalJSON(acknowledgement, &ack); err != nil {
return errorsmod.Wrapf(sdkerrors.ErrUnknownRequest, "cannot unmarshal packet acknowledgement: %v", err)
}
sdkResult, err := im.handleOracleAcknowledgment(ctx, ack, modulePacket)
if err != nil {
return err
}
if sdkResult != nil {
sdkResult.Events = ctx.EventManager().Events().ToABCIEvents()
return nil
}
// this line is used by starport scaffolding # oracle/packet/module/ack
return nil
}
// OnTimeoutPacket implements the IBCModule interface
func (im IBCModule) OnTimeoutPacket(
ctx sdk.Context,
modulePacket channeltypes.Packet,
relayer sdk.AccAddress,
) error {
return nil
}