From d7bf2a8b3c8e9b16a38dc6647faf27da8e6b0e24 Mon Sep 17 00:00:00 2001
From: Damian Nolan <damiannolan@gmail.com>
Date: Mon, 24 Jan 2022 17:01:05 +0100
Subject: [PATCH] feat: query host chain msg events via cli (#782)

* WIP implementation

* removing grpc query

* update long usage

* removing buf.yaml updates

* use limit of 1

* adding channel id validation to short circuit with invalid ids
---
 .../host/client/cli/cli.go                    |  1 +
 .../host/client/cli/query.go                  | 56 +++++++++++++++++++
 third_party/proto/buf.yaml                    |  2 +-
 3 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/modules/apps/27-interchain-accounts/host/client/cli/cli.go b/modules/apps/27-interchain-accounts/host/client/cli/cli.go
index 9d88f4cba21..2ae88a48b70 100644
--- a/modules/apps/27-interchain-accounts/host/client/cli/cli.go
+++ b/modules/apps/27-interchain-accounts/host/client/cli/cli.go
@@ -15,6 +15,7 @@ func GetQueryCmd() *cobra.Command {
 
 	queryCmd.AddCommand(
 		GetCmdParams(),
+		GetCmdPacketEvents(),
 	)
 
 	return queryCmd
diff --git a/modules/apps/27-interchain-accounts/host/client/cli/query.go b/modules/apps/27-interchain-accounts/host/client/cli/query.go
index bb4e315ca06..c35e03baa16 100644
--- a/modules/apps/27-interchain-accounts/host/client/cli/query.go
+++ b/modules/apps/27-interchain-accounts/host/client/cli/query.go
@@ -2,13 +2,20 @@ package cli
 
 import (
 	"fmt"
+	"strconv"
 
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/client/flags"
+	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/version"
+	"github.com/cosmos/cosmos-sdk/x/auth/tx"
 	"github.com/spf13/cobra"
+	abci "github.com/tendermint/tendermint/abci/types"
 
 	"github.com/cosmos/ibc-go/v3/modules/apps/27-interchain-accounts/host/types"
+	icatypes "github.com/cosmos/ibc-go/v3/modules/apps/27-interchain-accounts/types"
+	channeltypes "github.com/cosmos/ibc-go/v3/modules/core/04-channel/types"
+	host "github.com/cosmos/ibc-go/v3/modules/core/24-host"
 )
 
 // GetCmdParams returns the command handler for the host submodule parameter querying.
@@ -39,3 +46,52 @@ func GetCmdParams() *cobra.Command {
 
 	return cmd
 }
+
+// GetCmdPacketEvents returns the command handler for the host packet events querying.
+func GetCmdPacketEvents() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:     "packet-events [channel-id] [sequence]",
+		Short:   "Query the interchain-accounts host submodule packet events",
+		Long:    "Query the interchain-accounts host submodule packet events for a particular channel and sequence",
+		Args:    cobra.ExactArgs(2),
+		Example: fmt.Sprintf("%s query interchain-accounts host packet-events channel-0 100", version.AppName),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			clientCtx, err := client.GetClientQueryContext(cmd)
+			if err != nil {
+				return err
+			}
+
+			channelID, portID := args[0], icatypes.PortID
+			if err := host.ChannelIdentifierValidator(channelID); err != nil {
+				return err
+			}
+
+			seq, err := strconv.ParseUint(args[1], 10, 64)
+			if err != nil {
+				return err
+			}
+
+			searchEvents := []string{
+				fmt.Sprintf("%s.%s='%s'", channeltypes.EventTypeRecvPacket, channeltypes.AttributeKeyDstChannel, channelID),
+				fmt.Sprintf("%s.%s='%s'", channeltypes.EventTypeRecvPacket, channeltypes.AttributeKeyDstPort, portID),
+				fmt.Sprintf("%s.%s='%d'", channeltypes.EventTypeRecvPacket, channeltypes.AttributeKeySequence, seq),
+			}
+
+			result, err := tx.QueryTxsByEvents(clientCtx, searchEvents, 1, 1, "")
+			if err != nil {
+				return err
+			}
+
+			var resEvents []abci.Event
+			for _, r := range result.Txs {
+				resEvents = append(resEvents, r.Events...)
+			}
+
+			return clientCtx.PrintString(sdk.StringifyEvents(resEvents).String())
+		},
+	}
+
+	flags.AddQueryFlagsToCmd(cmd)
+
+	return cmd
+}
diff --git a/third_party/proto/buf.yaml b/third_party/proto/buf.yaml
index 8ab26336f50..b111c46ba08 100644
--- a/third_party/proto/buf.yaml
+++ b/third_party/proto/buf.yaml
@@ -30,4 +30,4 @@ lint:
     - proofs.proto # confio/ics23
     - gogoproto
     - google
-    - tendermint
+    - tendermint
\ No newline at end of file