# Steem Developer Portal

### RB: Submit Post

This example will broadcast a new post 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.

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

A post is differentiated from a comment by whether or not a `parent_author` exists. When there is no `parent_author`, then it’s a post, otherwise it’s a comment.

### 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 posting.
- `permlink` - Value unique to the author
- `parent_author` - An empty string, in the case of a root post like this example.
- `parent_permlink` - The first tag, in the case of a root post like this example.
- `title` - Human readable title.
- `body` - The actual content of the post.
- `json_metadata` - JSON containing all of the tags.

### 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/10_submit_post
    bundle install
    ruby submit_a_new_post.rb

### Example Output

    {
      "jsonrpc": "2.0",
      "result": {
        "id": "768f7f64cee94413da0017ef79f592bb4da86baf",
        "block_num": 22867626,
        "trx_num": 43,
        "expired": false
      },
      "id": 1
    }

The response we get after broadcasting the transaction gives us the transaction id (`768f7f6...`), block number (`22867626`), and the transaction number of that block (`43`).

#### 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.