Deploying application ​

The deployment of an application is done in two basic steps:

1. Upload of the application Cartesi machine to IPFS;
2. Instantiation of the application onchain;

The process is illustrated below:

Cartesi machine upload ​

The first step in the deployment process is to make the application Cartesi machine publicly available so the validator can download it and run the application node. Sunodo uses IPFS as a decentralized storage for the Cartesi machine.

Initially the developer must run his own IPFS node and add the Cartesi machine to it. Any IPFS client works fine, including IPFS Desktop.

Technically the machine must be packaged as a CAR file, which is a verifiable content-addressed archive. When the developer adds the file to IPFS it gets back a CID hash. Different machines produce different IPFS CID hashes.

With the CID in hand the developer can register his application onchain.

Application instantiation ​

After obtaining the CID of the Cartesi machine the developer must select a PayableDAppFactory and call the newApplication method, which requires four parameters:

• dappOwner: the owner of the deployed application, which has the power to switch the validator;
• templateHash: the cartesi machine template hash, obtained after sunodo build;
• cid: the IPFS CID hash of the Cartesi machine upload to IPFS;
• runway: the amount of time to pre-pay for application execution;

Depending on the runway parameter the developer must approve a certain amount of tokens of the ERC-20 contract of the PayableDAppFactory to the payee of the PayableDAppFactory.

The amount of tokens can be calculated using the cost view method of the PayableDAppFactory. For further details check the billing section.

Using the CLI ​

The command below will guide the developer through an interactive process to deploy the application, including all the steps above.

sunodo deploy

sunodo deploy

The following wallets are currently supported for signing the necessary onchain transactions:

• Metamask for iPhone or Android;
• Any mobile wallet compatible with WalletConnect.

Using the Web Application ​