Calling Your Contract

Now that your contract has been fully deployed, we can start to interact with it! Flipper only has two functions, so we will show you what it's like to play with both of them.

get()

If you take a look back at our contract's on_deploy() function, we set the initial value of the Flipper contract to false. Let's check that this is the case.

flip()

So let's make the value true now!

The alternative message to send we can make with the UI is flip(). In this updated version, the contract will automatically estimate the necessary max gas allowed. In this case, it's 674. Leave estimated gas turned on, and execute the contract. In the following screen, authorize the transaction by clicking the sign and submit button.

You will notice that this call actually sends a transaction. If the transaction was successful, we should then be able to go back to the get() function and see our updated storage:

Woohoo! You deployed your first smart contract!

Moving Forward

We will not go over these setup and deployment steps again, but we will use them throughout the tutorial. You can always come back to this chapter if you need to remember how to do a certain process.

The rest of the tutorial will have template code which you will use to walk through the different steps of contract development. Each template comes with a fully designed suite of tests that should pass if you programmed your contract correctly. Before you move on from a section, make sure that you run:

cargo +nightly test

and that the tests all execute successfully, without any warnings.

You need not deploy your contract between each section, but if we ask you to deploy your contract, you will need to follow the same steps you have done with the Flipper contract.