add create post event

testutil/constants.go

@@ -0,0 +1,7 @@
+package testutil
+
+const (
+	Alice = "cosmos1jmjfq0tplp9tmx4v9uemw72y4d2wa5nr3xn9d3"
+	Bob   = "cosmos1xyxs3skf3f4jfqeuv89yyaqvjc6lffavxqhc8g"
+	Carol = "cosmos1e0w5t53nrq7p66fye6c8p0ynyhf6y24l4yuxd7"
+)

x/blog/keeper/msg_server_create_post.go

@@ -33,6 +33,15 @@ func (k msgServer) CreatePost(goCtx context.Context, msg *types.MsgCreatePost) (
 	postCount.Count++
 	k.Keeper.SetPostCount(ctx, postCount)
 
+	ctx.EventManager().EmitEvent(
+		sdk.NewEvent(types.PostCreatedEventType,
+			sdk.NewAttribute(types.PostCreatedCreator, msg.Creator),
+			sdk.NewAttribute(types.PostCreatedPostIndex, newIndex),
+			sdk.NewAttribute(types.PostCreatedTitle, msg.Title),
+			sdk.NewAttribute(types.PostCreatedBody, msg.Body),
+		),
+	)
+
 	return &types.MsgCreatePostResponse{
 		PostIndex: newIndex,
 	}, nil

x/blog/keeper/msg_server_create_post_test.go

@@ -1,6 +1,7 @@
 package keeper_test
 
 import (
+	"blog/testutil"
 	keepertest "blog/testutil/keeper"
 	"blog/x/blog"
 	"blog/x/blog/keeper"
@@ -49,3 +50,28 @@ func TestCreatePostBadBody(t *testing.T) {
 	require.Nil(t, createResponse)
 	require.EqualError(t, err, "index = 0: body is missing")
 }
+
+func TestCreatePostEmitted(t *testing.T) {
+	msgServer, _, context := setupMsgServerCreatePost(t)
+	_, err := msgServer.CreatePost(context, &types.MsgCreatePost{
+		Creator: testutil.Alice,
+		Title:   "Test",
+		Body:    "This is a test",
+	})
+	require.Nil(t, err)
+
+	ctx := sdk.UnwrapSDKContext(context)
+	require.NotNil(t, ctx)
+	events := sdk.StringifyEvents(ctx.EventManager().ABCIEvents())
+	require.Len(t, events, 1)
+	event := events[0]
+	require.EqualValues(t, sdk.StringEvent{
+		Type: "new-post-created",
+		Attributes: []sdk.Attribute{
+			{Key: "creator", Value: testutil.Alice},
+			{Key: "post-index", Value: "0"},
+			{Key: "title", Value: "Test"},
+			{Key: "body", Value: "This is a test"},
+		},
+	}, event)
+}

x/blog/types/keys.go

@@ -21,3 +21,12 @@ func KeyPrefix(p string) []byte {
 const (
 	PostCountKey = "PostCount/value/"
 )
+
+// CreatePost Events
+const (
+	PostCreatedEventType = "new-post-created"
+	PostCreatedCreator   = "creator"
+	PostCreatedPostIndex = "post-index"
+	PostCreatedTitle     = "title"
+	PostCreatedBody      = "body"
+)