Dev Setup for Crypto and AI

Create an EC-2 Instance for Devbox

• A t2.medium should be fine. It has 2 vCPU and 4 GB memory and costs 0.0464 USD per hour. That is roughly $35 per month. A little steep but worth it.

• For AMI, choose Deep Learning AMI GPU PyTorch 1.12.0 (Ubuntu 20.04) 20220913 (ami-08e2d37b6a0129927)

Install NodeJS

Source: https://github.com/nodesource/distributions/blob/master/README.md#debinstall

curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash - &&\
sudo apt-get install -y nodejs

Another option is to first install node version manager.
Source: https://github.com/nvm-sh/nvm

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash

Check for LTS versions and install one of the latest ones.

nvm ls-remote
nvm install v16.17.1
nvm use v16.17.1
node -v > .nvmrc
nvm use

Install Truffle

npm install -g truffle
truffle -v

A simple project

mkdir fundraiser
cd fundraiser
truffle unbox react

Commands:

  Contracts: Compile:         cd truffle && truffle compile
  Contracts: Test:            cd truffle && truffle test
  Contracts: Migrate:         cd truffle && truffle migrate
  Dapp: Run dev server:       cd client && npm start
  Dapp: Test:                 cd client && npm test
  Dapp: Build for production: cd client && npm run build

Remove existing files and create new ones

rm truffle/contracts/SimpleStorage.sol
rm truffle/migrations/1_deploy_simple_storage.js
rm -f truffle/test/*

touch truffle/contracts/Fundraiser.sol truffle/test/fundraiser_test.js

Create a basic smart contract and a basic test file.

// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;

contract Fundraiser {}

const FundraiserContract = artifacts.require("Fundraiser");

contract("Fundraiser", accounts => {
    let fundraiser;
    const name = "My Fundraiser";

    describe("initialization", () => {
        beforeEach(async () => {
            fundraiser = await FundraiserContract.new(name);
        });

        it("gets the beneficiary name", async () => {
            const actualName = await fundraiser.name();
            assert.equal(actualName, name);
        });
    });
});

This test will fail initially. One can fix the failing test with the following changes.

// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;

contract Fundraiser {
    string public name;

    constructor(string memory _name) {
        name = _name;
    }
}

At this point if you want to start a new project you may want to directly use this template: https://github.com/maddyonline/fundraiser. This template does above steps and leaves it at this stage.

If you clone the template, you can try running truffle test in truffle directory and you should be off to the races.