How to Call a SingularityNET Service


#1

Step 1. Get some Ether

Ether is used to pay for interactions on the block chain (known as gas).

The transactions you make a call to SingularityNET are:

  • Transfer AGI into the multi-party escrow account,
  • Create a payment channel for a service published in the SingularityNET registry, and
  • Transfer AGI into the payment channel and set the timeout

After that, you interact with the service directly and won’t need to pay for further transactions unless you want add more AGI or extend the timeout for the payment channel.

So how do you get Ether? The mainnet requires you to buy or mine it, but we’re going to use a test net for now. Specifically Ropsten.

Luckily for test networks you can go to a faucet to request some Ether for free.

To use the faucet you need to create a wallet, and then provide them with your wallet’s public address.

Step 2. Get some AGI

We provide a faucet to get AGI for either Ropsten or Kovan networks: https://faucet.singularitynet.io/

You’ll need a github account to authenticate, and there after you can request AGI every 24 hours. (TODO confirm this timeout period is correct)

Step 3. Make a Call from the Marketplace

TODO someone needs to step through with the final beta UI taking screenshots

The snet CLI tool is your swiss army knife for working with SingularityNET. It lets you publish services, manage your identities, and query what AI services are available to use. If you are familar with cloud providers like Amazon or Google, this is our decentralised equivalent of their aws or gcloud respectively.

You can install the CLI with pip:

You then need to create an identity that matches your metamask account, since this is where the faucets sent all your test tokens too.

snet identity create YOURNAME key

You will be prompted for the private key for your wallet. To get this, click “Show your account details” on metamask, and “export your private key”. This will ask for your metamask password. Once you enter it, you can then copy your private key and paste it into the snet cli. Next, you should probably copy some meaningless text to your clipboard to avoid accidentally pasting the key somewhere it shouldn’t go.

WARNING: Your private key is like the password to your online banking. Be very careful with it. Anyone who has it can control where your funds go.

SingularityNET takes your security seriously and any vulnerabilities can be reported on our Github (if minor), or emailed to security@singularitynet.io

Step 5. Make a Call from the Command Line

TODO

Step 6. Congratulations!

You’ve managed to set up your environment to interact with SingularityNET and call services via the marketplace and the command line.

While these ways of working with SingularityNET are very powerful (we’ve barely touched on all the things the CLI is used for), this isn’t how you’d necessarily want to build an application that is integrated with SingularityNET. To do that, we recommend that you learn about our SDK which is the next article in our Getting Started series.


This is a companion discussion topic for the original entry at https://dev.singularitynet.io/tutorials/call-a-service/

#2

YES, please.

I was looking at how to use the snet Command Line Interface, and I had issues with it.

I want to be able to access and publish services that are not available on the main curated marketplace, to see for myself how it works.