improve 04-channel logging (backport #692) (#695)

* improve 04-channel logging (#692)

## Description

closes: #674

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes

(cherry picked from commit 087bc5d)

# Conflicts:
#	CHANGELOG.md

* fix conflicts

* fix broken link

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>
Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

CHANGELOG.md

@@ -34,6 +34,12 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 # Changelog
 
+## [v1.1.6](https://github.com/cosmos/ibc-go/releases/tag/v1.1.6) - 2021-01-12
+
+### Improvements
+
+* (channel) [\#692](https://github.com/cosmos/ibc-go/pull/692) Minimize channel logging by only emitting the packet sequence, source port/channel, destination port/channel upon packet receives, acknowledgements and timeouts.
+
 ## [v1.1.5](https://github.com/cosmos/ibc-go/releases/tag/v1.1.5) - 2021-12-15
 
 ### Dependencies

docs/ibc/relayer.md

@@ -14,7 +14,7 @@ order: 4
 Events are emitted for every transaction processed by the base application to indicate the execution
 of some logic clients may want to be aware of. This is extremely useful when relaying IBC packets.
 Any message that uses IBC will emit events for the corresponding TAO logic executed as defined in
-the [IBC events spec](https://github.com/cosmos/ibc-go/blob/main/modules/core/spec/06_events.md).
+the [IBC events spec](../../modules/core/spec/06_events.md).
 
 In the SDK, it can be assumed that for every message there is an event emitted with the type `message`,
 attribute key `action`, and an attribute value representing the type of message sent 

modules/core/04-channel/keeper/packet.go

@@ -2,7 +2,6 @@ package keeper
 
 import (
 	"bytes"
-	"fmt"
 	"time"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
@@ -135,6 +134,7 @@ func (k Keeper) SendPacket(
 		"dst_port", packet.GetDestPort(),
 		"dst_channel", packet.GetDestChannel(),
 	)
+
 	return nil
 }
 
@@ -281,7 +281,14 @@ func (k Keeper) RecvPacket(
 	}
 
 	// log that a packet has been received & executed
-	k.Logger(ctx).Info("packet received", "packet", fmt.Sprintf("%v", packet))
+	k.Logger(ctx).Info(
+		"packet received",
+		"sequence", packet.GetSequence(),
+		"src_port", packet.GetSourcePort(),
+		"src_channel", packet.GetSourceChannel(),
+		"dst_port", packet.GetDestPort(),
+		"dst_channel", packet.GetDestChannel(),
+	)
 
 	// emit an event that the relayer can query for
 	EmitRecvPacketEvent(ctx, packet, channel)
@@ -345,7 +352,14 @@ func (k Keeper) WriteAcknowledgement(
 	)
 
 	// log that a packet acknowledgement has been written
-	k.Logger(ctx).Info("acknowledged written", "packet", fmt.Sprintf("%v", packet))
+	k.Logger(ctx).Info(
+		"acknowledgement written",
+		"sequence", packet.GetSequence,
+		"src_port", packet.GetSourcePort(),
+		"src_channel", packet.GetSourceChannel(),
+		"dst_port", packet.GetDestPort(),
+		"dst_channel", packet.GetDestChannel(),
+	)
 
 	EmitWriteAcknowledgementEvent(ctx, packet, channel, acknowledgement)
 
@@ -472,7 +486,14 @@ func (k Keeper) AcknowledgePacket(
 	k.deletePacketCommitment(ctx, packet.GetSourcePort(), packet.GetSourceChannel(), packet.GetSequence())
 
 	// log that a packet has been acknowledged
-	k.Logger(ctx).Info("packet acknowledged", "packet", fmt.Sprintf("%v", packet))
+	k.Logger(ctx).Info(
+		"packet acknowledged",
+		"sequence", packet.GetSequence,
+		"src_port", packet.GetSourcePort(),
+		"src_channel", packet.GetSourceChannel(),
+		"dst_port", packet.GetDestPort(),
+		"dst_channel", packet.GetDestChannel(),
+	)
 
 	// emit an event marking that we have processed the acknowledgement
 	EmitAcknowledgePacketEvent(ctx, packet, channel)

modules/core/04-channel/keeper/timeout.go

@@ -2,7 +2,6 @@ package keeper
 
 import (
 	"bytes"
-	"fmt"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
@@ -157,7 +156,14 @@ func (k Keeper) TimeoutExecuted(
 		k.SetChannel(ctx, packet.GetSourcePort(), packet.GetSourceChannel(), channel)
 	}
 
-	k.Logger(ctx).Info("packet timed-out", "packet", fmt.Sprintf("%v", packet))
+	k.Logger(ctx).Info(
+		"packet timed-out",
+		"sequence", packet.GetSequence(),
+		"src_port", packet.GetSourcePort(),
+		"src_channel", packet.GetSourceChannel(),
+		"dst_port", packet.GetDestPort(),
+		"dst_channel", packet.GetDestChannel(),
+	)
 
 	// emit an event marking that we have processed the timeout
 	EmitTimeoutPacketEvent(ctx, packet, channel)