# Steem Developer Portal

### RB: Submit Comment Reply

By the end of this tutorial you should know how to prepare comments for Steem and then submit using Radiator.

Full, runnable src of Submit Comment Reply can be downloaded as part of the RB tutorials repository.

### Intro

This example will broadcast a reply to the blockchain using the values provided. To create a post in `ruby`, we will use a `Radiator::Transaction` containing a `comment` operation, which is how all content is stored internally.

A reply is differentiated from a post by whether or not a `parent_author` exists. When there is no `parent_author`, then it’s a post, otherwise it’s a comment (like in this example).

### Script

You should change `wif` to the posting key that matches your `author`. This script will pass along the values as a `comment` operation:

- `author` - Account name of the author currently replying.
- `permlink` - Value unique to the author
- `parent_author` - The name of the author of the being replied to, in the case of a reply like this example.
- `parent_permlink` - The permlink of the content being replied to, in the case of a reply like this example.
- `title` - Typically empty.
- `body` - The actual content of the post.
- `json_metadata` - JSON containing the `parent_permlink` of the root post as a tags array.

### To Run

First, set up your workstation using the steps provided in Getting Started. Then you can create and execute the script (or clone from this repository):

    git clone git@github.com:steemit/devportal-tutorials-rb.git
    cd devportal-tutorials-rb/tutorials/11_submit_comment_reply
    bundle install
    ruby submit_comment_reply.rb

### Example Output

    {
      "jsonrpc": "2.0",
      "result": {
        "id": "3fef14cac921e9baa7b31e43245e5380f3fb4332",
        "block_num": 23355115,
        "trx_num": 13,
        "expired": false
      },
      "id": 3
    }

The response we get after broadcasting the transaction gives us the transaction id (`3fef14c...`), block number (`22867626`), and the transaction number of that block (`13`).

#### Error Handling

We’re checking the result for `error` in case the remote node has an issue to raise. Normally, it will be `nil`, but if it’s populated, output `error.message` and exit.