Cardano Smart Contract in 5 minutes w/ helios

Prerequisites

Things you will need before starting playing around w/ this project

1. A funded wallet in a testnet. This project uses testnet preview by default
2. A native asset to lock in the vault. This project is minimalistic, no minting available. Hit me on twitter @cryptojoe101 if you want some nft to play around
3. Patience
4. A decent understanding of the (e)utxo model.
5. More Patience

Running the Getting Started

First, run the development server:

npm run dev
# or
yarn dev
# or
pnpm dev

Open http://localhost:3000 with your browser to see the result.

How to bootstrap the project

1. npx create-next-app@latest cardano-sc-5-minutes
2. npm i "@hyperionbt/helios"

Gotchas

In this paragraph a couple of snippet of code to speed up the dev.

Accessing the Cardano object

When using TypeScript this snippet is required to make editor and compiler happy

declare global {
  interface Window {
    cardano: any;
  }
}

Fetching the Network Params

Cardano Network parameters are required when finalising the transaction (eg fees, collateral etc.).

fetch('https://d1t0d7c2nekuk0.cloudfront.net/preview.json')
    .then(response => response.json())
    .then(params => setNetworkParams(new NetworkParams(params)))