Running the application

Running your application starts your backend on port 8080 and local Anvil node on port 8545.

In essence, the node also logs all outputs received by your backend.

Here are the prerequisites to run the node:

• Docker Engine must be active.
• Cartesi machine snapshot successfully built with cartesi build.

To start the node, run:

cartesi run

This command runs your backend compiled to RISC-V and packages it as a Cartesi machine.

troubleshooting common errors

Error: Depth Too High

Attaching to 2bd74695-prompt-1, 2bd74695-validator-1
2bd74695-validator-1  | Error: DepthTooHigh { depth: 2, latest: 1 }
2bd74695-validator-1  | Error: DepthTooHigh { depth: 2, latest: 1 }

This indicates that the node is reading blocks too far behind the current blockchain state.

Solution

Create or modify a .cartesi.env file in your project directory and set:

TX_DEFAULT_CONFIRMATIONS=1

This adjustment should align the node's block reading with the blockchain's current state.

Overview of Node Services

The cartesi run command activates several services essential for node operation:

• Anvil Chain: Runs a local blockchain available at http://localhost:8545.

• GraphQL Playground: An interactive IDE at http://localhost:8080/graphql for exploring the GraphQL server.

• Blockchain Explorer: Monitors node activity and manages transactions via http://localhost:8080/explorer/.

• Inspect: A diagnostic tool accessible at http://localhost:8080/inspect/ to inspect the node’s state.

CartesiScan

CartesiScan is a valuable tool for developers and users alike, offering a comprehensive overview of Cartesi Rollups applications and their interactions with the blockchain.

Additionally, it provides expandable data regarding outputs, encompassing notices, vouchers, and reports.

When you run your application with cartesi run , there is a local instance of CartesiScan on http://localhost:8080/explorer.

Testing tools

NoNodo is a Cartesi Rollups testing tool that works with host machine applications, eliminating the need for Docker or RISC-V compilation.