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channel.go
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channel.go
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package relayer
import (
"context"
"fmt"
"time"
chantypes "github.com/cosmos/ibc-go/v8/modules/core/04-channel/types"
host "github.com/cosmos/ibc-go/v8/modules/core/24-host"
"github.com/cosmos/relayer/v2/relayer/processor"
"github.com/cosmos/relayer/v2/relayer/provider"
"go.uber.org/zap"
)
// CreateOpenChannels runs the channel creation messages on timeout until they pass.
func (c *Chain) CreateOpenChannels(
ctx context.Context,
dst *Chain,
maxRetries uint64,
timeout time.Duration,
srcPortID, dstPortID, order, version string,
override bool,
memo string,
pathName string,
) error {
// client and connection identifiers must be filled in
if err := ValidateConnectionPaths(c, dst); err != nil {
return err
}
// port identifiers and channel ORDER must be valid
if err := ValidateChannelParams(srcPortID, dstPortID, order); err != nil {
return err
}
if !override {
channel, err := QueryPortChannel(ctx, c, srcPortID)
if err == nil && channel != nil {
return fmt.Errorf("channel {%s} with port {%s} already exists on chain {%s}", channel.ChannelId, channel.PortId, c.ChainID())
}
channel, err = QueryPortChannel(ctx, dst, dstPortID)
if err == nil && channel != nil {
return fmt.Errorf("channel {%s} with port {%s} already exists on chain {%s}", channel.ChannelId, channel.PortId, dst.ChainID())
}
}
// Timeout is per message. Four channel handshake messages, allowing maxRetries for each.
processorTimeout := timeout * 4 * time.Duration(maxRetries)
ctx, cancel := context.WithTimeout(ctx, processorTimeout)
defer cancel()
pp := processor.NewPathProcessor(
c.log,
processor.NewPathEnd(pathName, c.PathEnd.ChainID, c.PathEnd.ClientID, "", []processor.ChainChannelKey{}),
processor.NewPathEnd(pathName, dst.PathEnd.ChainID, dst.PathEnd.ClientID, "", []processor.ChainChannelKey{}),
nil,
memo,
DefaultClientUpdateThreshold,
DefaultFlushInterval,
DefaultMaxMsgLength,
0,
0,
)
c.log.Info("Starting event processor for channel handshake",
zap.String("src_chain_id", c.PathEnd.ChainID),
zap.String("src_port_id", srcPortID),
zap.String("dst_chain_id", dst.PathEnd.ChainID),
zap.String("dst_port_id", dstPortID),
)
return processor.NewEventProcessor().
WithChainProcessors(
c.chainProcessor(c.log, nil),
dst.chainProcessor(c.log, nil),
).
WithPathProcessors(pp).
WithInitialBlockHistory(0).
WithMessageLifecycle(&processor.ChannelMessageLifecycle{
Initial: &processor.ChannelMessage{
ChainID: c.PathEnd.ChainID,
EventType: chantypes.EventTypeChannelOpenInit,
Info: provider.ChannelInfo{
PortID: srcPortID,
CounterpartyPortID: dstPortID,
ConnID: c.PathEnd.ConnectionID,
Version: version,
Order: OrderFromString(order),
},
},
Termination: &processor.ChannelMessage{
ChainID: dst.PathEnd.ChainID,
EventType: chantypes.EventTypeChannelOpenConfirm,
Info: provider.ChannelInfo{
PortID: dstPortID,
CounterpartyPortID: srcPortID,
},
},
}).
Build().
Run(ctx)
}
// CloseChannel runs the channel closing messages on timeout until they pass.
func (c *Chain) CloseChannel(
ctx context.Context,
dst *Chain,
maxRetries uint64,
timeout time.Duration,
srcChanID,
srcPortID string,
memo string,
pathName string,
) error {
// Timeout is per message. Two close channel handshake messages, allowing maxRetries for each.
processorTimeout := timeout * 2 * time.Duration(maxRetries)
// Perform a flush first so that any timeouts are cleared.
flushCtx, flushCancel := context.WithTimeout(ctx, processorTimeout)
defer flushCancel()
flushProcessor := processor.NewEventProcessor().
WithChainProcessors(
c.chainProcessor(c.log, nil),
dst.chainProcessor(c.log, nil),
).
WithPathProcessors(processor.NewPathProcessor(
c.log,
processor.NewPathEnd(pathName, c.PathEnd.ChainID, c.PathEnd.ClientID, "", []processor.ChainChannelKey{}),
processor.NewPathEnd(pathName, dst.PathEnd.ChainID, dst.PathEnd.ClientID, "", []processor.ChainChannelKey{}),
nil,
memo,
DefaultClientUpdateThreshold,
DefaultFlushInterval,
DefaultMaxMsgLength,
0,
0,
)).
WithInitialBlockHistory(0).
WithMessageLifecycle(&processor.FlushLifecycle{}).
Build()
c.log.Info("Starting event processor for flush before channel close",
zap.String("src_chain_id", c.PathEnd.ChainID),
zap.String("src_port_id", srcPortID),
zap.String("dst_chain_id", dst.PathEnd.ChainID),
)
if err := flushProcessor.Run(flushCtx); err != nil {
return err
}
ctx, cancel := context.WithTimeout(ctx, processorTimeout)
defer cancel()
c.log.Info("Starting event processor for channel close",
zap.String("src_chain_id", c.PathEnd.ChainID),
zap.String("src_port_id", srcPortID),
zap.String("dst_chain_id", dst.PathEnd.ChainID),
)
return processor.NewEventProcessor().
WithChainProcessors(
c.chainProcessor(c.log, nil),
dst.chainProcessor(c.log, nil),
).
WithPathProcessors(processor.NewPathProcessor(
c.log,
processor.NewPathEnd(pathName, c.PathEnd.ChainID, c.PathEnd.ClientID, "", []processor.ChainChannelKey{}),
processor.NewPathEnd(pathName, dst.PathEnd.ChainID, dst.PathEnd.ClientID, "", []processor.ChainChannelKey{}),
nil,
memo,
DefaultClientUpdateThreshold,
DefaultFlushInterval,
DefaultMaxMsgLength,
0,
0,
)).
WithInitialBlockHistory(0).
WithMessageLifecycle(&processor.ChannelCloseLifecycle{
SrcChainID: c.PathEnd.ChainID,
SrcChannelID: srcChanID,
SrcPortID: srcPortID,
SrcConnID: c.PathEnd.ConnectionID,
DstConnID: dst.PathEnd.ConnectionID,
}).
Build().
Run(ctx)
}
// ValidateChannelParams validates a set of port-ids as well as the order.
func ValidateChannelParams(srcPortID, dstPortID, order string) error {
if err := host.PortIdentifierValidator(srcPortID); err != nil {
return err
}
if err := host.PortIdentifierValidator(dstPortID); err != nil {
return err
}
if (OrderFromString(order) == chantypes.ORDERED) || (OrderFromString(order) == chantypes.UNORDERED) {
return nil
}
return fmt.Errorf("invalid order input (%s), order must be 'ordered' or 'unordered'", order)
}