Blog: add comments

[eleijonmarck]

context

At its current state in this repo, x/blog allows users to create blog posts and to list all existing blog posts. The challenge consists of adding comments to x/blog: we want users to be able to comment on those blog posts.

proposal

Concretely, we would like to see the following components added:

• The addition of a new Msg service method called CreateComment. This method's input should take:
  • post_slug as string,
  • author as string (Bech32-encoded address),
  • body as string.
• New comments should be persisted to the blockchain state. A comment cannot be inserted into state if its corresponding Post does not exist in state.
• The addition of a new AllComments gRPC query method. This method's input should take a post_slug (a string), and returns all the comments on a post.
• The addition of two CLI subcommands, tx create-comment and query list-comments, which call the CreateComment and AllComments service methods under the hood.

action plan

1. generate from comment from schema types.proto using proto-gen

Once I wanted to generate the schema, I found that there was some faults in the code generating and submitted an issue for buf -

Issue to buf - bufbuild/buf#1215
Once buf , last step was to change the common.proto file reference to types.proto reference
Submitted a PR to update the challenge - regen-network#8

2. Update CreateComment method
   Once proto-gen worked, there was little time, needed to implement the CreateComment and check if post does not exist

3. Make the AllComments query method,

[eleijonmarck]

test failing currently due to:

...
    network.go:360: starting test network...
    network.go:365: started test network
    --- FAIL: TestKeeperTestSuite/TestCreateComment (3.34s)
        --- FAIL: TestKeeperTestSuite/TestCreateComment/valid_comment_request (3.34s)
            cli_test.go:230:
                	Error Trace:	cli_test.go:230
                	            				suite.go:77
                	Error:      	Not equal:
                	            	expected: 0x0
                	            	actual  : 0x12
                	Test:       	TestKeeperTestSuite/TestCreateComment/valid_comment_request
    cli_test.go:38: tearing down integration test suite

Have looked at: CreateComment method https://github.com/eleijonmarck/Blockchain-Engineer-Challenge/pull/1/files#diff-0a3af8172991c20cb50dfbc68b2c5a7b1da8f86849911f9962b249f184703399R42

But it does seem to run smoothly, so there might be an issue between sending the command to the grpc request to recieving the response. But looking for input here 🙏

[eleijonmarck]

protoc move to buf alpha