@calindra/cartesify

Cartesify

Introduction

Cartesify is a powerful web3 client that allows you to interact with the Cartesi Machine. It enables you to send transactions, query data, and seamlessly interact with your backend using a REST-like approach.

Getting Started

The easiest way to get started with Cartesify is by simply cloning the template from: cartesify-template.

Installation

To use our web3 client, follow these simple installation steps:

npm install @calindra/cartesify

Pay attention: @calindra/cartesify is intended to be used with @calindra/cartesify-backend

Usage

1. Import and configure the Web3 library into your project:

   import { Cartesify } from "@calindra/cartesify";
   
   const CARTESI_INSPECT_ENDPOINT="http://localhost:8080/inspect";
   
   // replace with the content of your dapp address (it could be found on dapp.json)
   const DAPP_ADDRESS="0x70ac08179605AF2D9e75782b8DEcDD3c22aA4D0C";
   
   const fetch = Cartesify.createFetch({
      dappAddress: '0x70ac08179605AF2D9e75782b8DEcDD3c22aA4D0C',
      endpoints: {
         graphQL: new URL("http://localhost:8080/graphql"),
         inspect: new URL("http://localhost:8080/inspect"),
      },
   })

2. Connect to MetaMask and get the signer:

   import { ethers } from "ethers";
   
   async function getSigner() {
      try {
         await window.ethereum.request({ method: "eth_requestAccounts" })
         const provider = new ethers.providers.Web3Provider(
            window.ethereum
         );
         return provider.getSigner();
      } catch (error) {
         console.log(error);
         alert("Connecting to metamask failed.");
      }
   }

3. Start interacting with the Cartesi Machine:

   const response = await fetch("http://127.0.0.1:8383/echo", {
      method: "POST",
      headers: {
            "Content-Type": "application/json",
      },
      body: JSON.stringify({ any: 'body' }),
      signer, // <- the signer
   })
   console.log(response.ok) // will print true
   const json = await response.json();
   console.log(json) // will print the backend response as json