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Interacting with Gno.land code

Overview​

In this tutorial, you will learn how to interact with Gno.land code. You will understand how to use your keypair to send transactions to realms and packages, send native coins, and more.

Prerequisites​

1. Get testnet GNOTs​

For interacting with any Gno.land chain, you will need a certain amount of GNOTs to pay gas fees with.

For this example, we will use the Portal Loop testnet. We can access the Portal Loop faucet through the Gno Faucet Hub, or by accessing the faucet directly at gno.land/faucet.

faucet-hub

After choosing "Gno Portal Loop", you will get a prompt to input your address, select the amount of testnet GNOT you want to receive, and solve a captcha:

faucet-hub-portal-loop

After inputting your address and solving the captcha, you can check if you have received funds with the following gnokey command:

gnokey query bank/balances/<your_gno_address> --remote "https://rpc.gno.land:443"

If the faucet request was successful, you should see something similar to the following:

❯ gnokey query bank/balances/<your_gno_address> --remote "https://rpc.gno.land:443"
height: 0
data: "10000000ugnot"

2. Visit a realm​

For this example, we will use the Userbook realm. The Userbook realm is a simple app that allows users to sign up, and keeps track of when they signed up. It also displays the currently signed-up users and the block height at which they have signed up.

userbook-default

Note: block heights are not correct because of the way the Portal Loop testnet works. Read more here.

To see what functions are available to call on the Userbook realm, click the [help] button.

userbook-help

By choosing one of the two gnokey commands and inputting your address (or keypair name) in the top bar, you will have a ready command to paste into your terminal. For example, the following command will call the SignUp function with the keypair MyKeypair: 

gnokey maketx call \
-pkgpath "gno.land/r/demo/userbook" \
-func "SignUp" \
-gas-fee 1000000ugnot \
-gas-wanted 2000000 \
-send "" \
-broadcast \
-chainid "portal-loop" \
-remote "https://rpc.gno.land:443" \
MyKeypair

To see what each option and flag in this command does, read the gnokey reference page.

Conclusion​

That's it! Congratulations on executing your first transaction on a Gno network! 🎉

If the previous transaction was successful, you should be able to see your address on the main page of the Userbook realm.

This concludes the "Local Setup" tutorial. For next steps, see the How-to guides section, where you will learn how to write your first realm, package, and much more.