Hello World

First, install SPARKL and make sure you’ve got a node running (use sse list if running natively, or docker ps if running the docker container).

We’re going to load HelloWorld into the node.

The file contains a mix which in turn contains a simple transaction.

The transaction invokes a request/reply operation on a nano-service.

Connect to the local SPARKL
```
sparkl connect http://localhost:8000
```
Login as local administrator (remember to register the local admin first)
```
sparkl login admin@localhost
```
Upload the HelloWorld configuration file to the Scratch folder in your SPARKL node
```
sparkl put http://opensparkl.org/uploads/HelloWorld.xml Scratch
```
For convenience, change current folder to your new Scratch/HelloWorld
```
sparkl cd Scratch/HelloWorld
```
Set a cli variable called name to the literal value of your name
```
sparkl vars -l name Maria
```
Invoke the transaction by calling the solicit operation and you will see the response
```
sparkl call Solicit
```

A polite greeting comes back.

Congratulations! You’ve now defined and executed your first Clear Box transaction!

You can try sparkl tree -a to view the HelloWorld mix on the console, which will show you this:


 µ HelloWorld
 ├── ▒ Sequencer:sequencer
 ├── ▒ NanoService:expr
 ├── ƒ name:string
 ├── ƒ greeting:string
 ├── >> Solicit:Sequencer name
 │   └── << Ok greeting
 └── <  Request:NanoService name
     └── > Ok greeting

You can also use sparkl render | browser to render it in your browser (I’m on a mac and used brew install browser which is a handy way to instantly render stdin).

Jacoby Thwaites

Strictly no more than 2 cups of coffee, morning only