echo-ts

Echo TypeScript dApp

This dApp implements the same behavior as the Echo Python dApp, but with a back-end written in TypeScript.

This can be used as a template for TypeScript Cartesi DApps. It uses node to execute the backend application.

The application entrypoint is the src/index.ts file. It is bundled with esbuild, but any bundler can be used.

Building the application

To build the application, run:

sunodo build

Running the application

This executes a Cartesi node for the application previously built with sunodo build.

sunodo run

Interacting with the application

You can use the sunodo send command to send input payloads to your applications.

With your node running, open a new terminal tab. You can send a generic input to your application as follows:

 sunodo send generic

For local testing, select Foundry which gives you mock and test faucets to submit transactions:

> sunodo send generic
? Chain (Use arrow keys)
❯ Foundry
? Chain Foundry
? RPC URL http://127.0.0.1:8545
? Wallet Mnemonic
? Mnemonic test test test test test test test test test test test junk
? Account 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266 9999.969170031383970357 ETH
? DApp address 0x70ac08179605AF2D9e75782b8DEcDD3c22aA4D0C
? Input String encoding
? Input (as string) Hello world, this is the echo-ts dApp!
✔ Input sent: 0xd30150ee888a2bbf6b491812ee9ca28cb5754381eba3415ce4087322768c191f

Check this documentation for a comprehensive list of input types that a dApp can receive.