All of our typescript challenges ported over from the javascript world

scaffold-eth-typescript-challenges's Introduction

🏗👷🏾 Scaffold-ETH Challenges

learn how to use 🏗 scaffold-eth to create decentralized applications on Ethereum. 🚀

🚩 Challenge 0: 🎟 Simple NFT Example 🤓

🎫 Create a simple NFT to learn basics of 🏗 scaffold-eth. You'll use 👷‍♀️ HardHat to compile and deploy smart contracts. Then, you'll use a template React app full of important Ethereum components and hooks. Finally, you'll deploy an NFT to a public network to share with friends! 🚀

https://github.com/scaffold-eth/scaffold-eth-typescript-challenges/tree/challenge-0-simple-nft

🚩 Challenge 1: 🥩 Decentralized Staking App

🦸 A superpower of Ethereum is allowing you, the builder, to create a simple set of rules that an adversarial group of players can use to work together. In this challenge, you create a decentralized application where users can coordinate a group funding effort. If the users cooperate, the money is collected in a second smart contract. If they defect, the worst that can happen is everyone gets their money back. The users only have to trust the code.

https://github.com/scaffold-eth/scaffold-eth-typescript-challenges/tree/challenge-1-decentralized-staking

🚩 Challenge 2: 🏵 Token Vendor 🤖

🤖 Smart contracts are kind of like "always on" vending machines that anyone can access. Let's make a decentralized, digital currency. Then, let's build an unstoppable vending machine that will buy and sell the currency. We'll learn about the "approve" pattern for ERC20s and how contract to contract interactions work.

https://github.com/scaffold-eth/scaffold-eth-typescript-challenges/tree/challenge-2-token-vendor

🚩 Challenge 3: 🎲 Dice Game

🎰 Randomness is tricky on a public deterministic blockchain. In this challenge you will explore creating random numbers using block hash and how that may be exploitable. Attack the dice game with your own contract by predicting the randomness ahead of time to always roll a winner!

https://github.com/scaffold-eth/scaffold-eth-typescript-challenges/tree/challenge-3-dice-game

🎉 Checkpoint: Eligible to join 🏰️ BuidlGuidl

The BuidlGuidl is a curated group of Ethereum builders creating products, prototypes, and tutorials to enrich the web3 ecosystem. A place to show off your builds and meet other builders. Start crafting your Web3 portfolio by submitting your DEX, Multisig or SVG NFT build.

https://buidlguidl.com/

⚖️ Build a DEX Challenge

💵 Build an exchange that swaps ETH to tokens and tokens to ETH. 💰 This is possible because the smart contract holds reserves of both assets and has a price function based on the ratio of the reserves. Liquidity providers are issued a token that represents their share of the reserves and fees...

DEX Telegram Channel: https://t.me/+_NeUIJ664Tc1MzIx

https://github.com/scaffold-eth/scaffold-eth-typescript-challenges/tree/challenge-4-dex

👛 Multisig Wallet Challenge

👩‍👩‍👧‍👧 Using a smart contract as a wallet we can secure assets by requiring multiple accounts to "vote" on transactions. The contract will keep track of transactions in an array of structs and owners will confirm or reject each one. Any transaction with enough confirmations can "execute".

Multisig Telegram Channel: https://t.me/+mkNNF_yHsK8yMTcx

https://github.com/scaffold-eth/scaffold-eth-typescript-challenges/tree/challenge-5-multisig

💬 Support Chat

Join the telegram support chat 💬 to ask questions and find others building with 🏗 scaffold-eth!

🙏 Please check out our Gitcoin grant too!

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scaffold-eth-typescript-challenges's Issues

Challenge-1

Challenge-0

bug in package.json

Line 17 should end with node", instead of chain",.

`yarn chain` failing with typescript version

After installing all yarn package, I run yarn chain to run the local blokchain but its giving following error. (Happening on both challenge 0 and challenge 1)

PS D:\coding-learning\speedrunethereum\challenge-1-decentralized-staking> yarn chain
yarn run v1.22.19
$ yarn workspace @scaffold-eth/hardhat chain
$ hardhat node --network hardhat --no-deploy
An unexpected error occurred:

hardhat.config.ts:31:5 - error TS2717: Subsequent property declarations must have the same type.  Property 'ethers' must be of type 'typeof import("D:/coding-learning/speedrunethereum/challenge-1-decentralized-staking/node_modules/ethers/lib/ethers") & HardhatEthersHelpers', but here has type 'any'.

31     ethers: TEthers;
       ~~~~~~

  node_modules/@nomiclabs/hardhat-ethers/internal/type-extensions.d.ts:6:9
    6         ethers: typeof ethers & HardhatEthersHelpers;
              ~~~~~~
    'ethers' was also declared here.

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed.
Exit code: 1

I am using Windows 11, VSCode and Powershell 7.5 terminal.

Tests missing from hardhat workspace

Vanilla JS version of this repo has tests against your contracts but this one just has a sample-test.ts file.

Test for challenge-1-decentralized-staking does not exist

In the vanilla JavaScript version of this challenge there is a file scaffold-eth-challenges/packages/hardhat/test/challenge_1.js. This file is missing in this TypeScript version of the challenge. Instead, there is only a sample test file scaffold-eth-typescript-challenges/packages/hardhat-ts/test/sample_test.ts which does not work due to chai not being installed as a package. It also does not test the challenge code.

In other words:
We need a version of challenge_1.js in this TypeScript version of the challenge. Preferably made into a TypeScript version.

Challenge 2 - USD Amount of Your Tokens

When you click to switch between the token amount and USD amount, it is multiplying the token amount * Eth price instead of the token price.

Challenge-0

Challenge-2

bug: yarn watch is using watch.js

Hi! yarn watch is using watch.js

yarn watch

node:internal/modules/cjs/loader:936
throw err;
^

Error: Cannot find module '/home/scaffold-eth-typescript-challenges/packages/hardhat-ts/scripts/watch.js'

test: Challenge 0 - Simple NFT Example Waiting for confirmation...

HI!

The "Challenge 0 - Simple NFT Example" test does not work for me. It does not go beyond "Waiting for confirmation...".

Do I need to do something else?

yarn test

Challenge 0: 🎟 Simple NFT Example 🤓
YourCollectible
✓ Should deploy YourCollectible (284ms)
mintItem()
🧑‍🏫 Tester Address: 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266
⚖️ Starting balance: 0
🔨 Minting...
🏷 mint tx: 0x30672a2f684c8d8ed69e88c2661f3890a30d85d909f7b94eba62ace58f4e43d8
⏳ Waiting for confirmation...

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 21.10
Release: 21.10
Codename: impish

node -v
v16.13.2

Challenge-1

Failing test in challenge-1 due to unnecessary contract execute call

This is the second milestone test for challenge-1: Should redeploy Staker, stake, not get enough, and withdraw.
The test calls the execute function - which is required to fail if the threshold has not been reached and therefore cannot be run in the same test as withdraw - which is required to succeed if the threshold has not been reached.
This causes the transaction to revert and the test to fail despite the contract fulfilling the criteria.
Calling execute is not mentioned in the test description so it is either there by mistake or is out of the scope of the test?

Link to relevant code