info

Please note that zkApp programmability is not yet available on Mina Mainnet, but zkApps can now be deployed to Berkeley Testnet.

# How to Deploy a zkApp

## Add a deploy alias to config.json​

Before deploying, we must first define a few settings, such as which network we are deploying to. We do this by creating a "deploy alias" within your smart contract project's config.json.

First, change into the directory containing your smart contract and then run the following command:

zk config

It will ask you to specify a name (can be anything), URL to deploy to, & fee (in MINA) to be used when sending your deploy transaction. The URL is the Mina GraphQL API that will receive your deploy transaction and broadcast it to the Mina network. Note that this URL is significant because it also determines which network you're be deploying to (e.g. QANet, Testnet, Mainnet, etc).

For Berkeley Testnet, let's use the following values:

• Name: berkeley
• URL: https://proxy.berkeley.minaexplorer.com/graphql
• Fee: 0.1
tip

If your project contains multiple smart contracts (e.g. Foo and Bar) that you intend to deploy to the same network, we recommend following a naming pattern such as berkeley-foo and berkeley-bar when naming your deploy aliases. You can change their names at anytime within config.json.

You will see the following output:

$zk configAdd a new network:✔ Choose a name (can be anything): · berkeley✔ Set URL to deploy to: · https://proxy.berkeley.minaexplorer.com/graphql✔ Set transaction fee to use when deploying (in MINA): · 0.1✔ Create key pair at keys/berkeley.json✔ Add network to config.jsonSuccess!Next steps:- If this is a testnet, request tMINA at: https://faucet.minaprotocol.com/?address=<YOUR-ADDRESS>- To deploy, run: zk deploy berkeley ## Request funds from the faucet​ To deploy your zkApp, you will need some funds to pay for transaction fees. To get funds on the Berkeley Testnet, use the URL that was shown from the CLI output. Visit https://faucet.minaprotocol.com/?address=<YOUR-ADDRESS> and click Request. You will have to wait a few minutes for the next block to include your transaction, so you'll have tMINA before proceeding to the next step. ## Deploy your smart contract​ To deploy your smart contract to the network, run the following command: zk deploy berkeley When running the deploy command, the zkApp CLI will compute a verification key for your zkApp CLI. Computing the verification key can take 1-2 minutes, so please be patient. The zkApp CLI will show you the details of the transaction such as the network name, the URL, and the smart contract that will be deployed.. Finally, enter yes or y when prompted, to confirm and send the transaction. You will see the following output: $ zk deploy berkeley✔ Build project✔ Generate build.json✔ Choose smart contract  Only one smart contract exists in the project: Add  Your config.json was updated to always use this  smart contract when deploying to this network.✔ Generate verification key (takes 1-2 min)✔ Build transaction✔ Confirm to send transaction  Are you sure you want to send (yes/no)? · y✔ Send to networkSuccess! Deploy transaction sent.Next step:  Your smart contract will be live (or updated)  as soon as the transaction is included in a block:  https://berkeley.minaexplorer.com/transaction/<txn-hash>

After a few minutes, the transaction will be included in the next block. To see your changes, search for the address that you used on berkeley.minaexplorer.com.

## Next Steps​

Now that you've learn how to deploy a smart contract, you can now learn how to write a UI for your zkApp.