Solidity Smart Contracts: Building DeFi DApps and Protocols for the Ethereum Blockchain

As you probably know, the ICO ("Initial Coin Offering") industry has been booming, and it's completely reinventing the way new startups kickstart themselves. In fact, go have a look at Wikipedia's list of highest crowdfunding projects, and you'll notice that blockchain projects absolutely dominate the list.

Understand the difference between IDO vs. IEO vs. ICO

Also check these links for latest listings:

ICO list at ICO Drops.

ICO List of Best New Initial Coin Offerings.

Top-Rated Crypto Token Sales: List of New ICOs, STOs, IEOs and IDOsTop-Rated Crypto Token Sales: List of New ICOs, STOs, IEOs and IDOs

Project Part 1: How to Launch a IEO on Binance Lauchpad

Read how to Lauch an IEO

Your first task of the project is to make a google slides presentation on how to start a IEO on the Binance Launch Pad.

Note: Also document the alternatives to Binance Launchpad.

Project Part 2: How to Launch a IDO on Polkastarter

Review the list of top fundraising platforms

Your second task of the project is to make a google slides presentation on how to start a IDO on the Polkastarter.

Project Part 3: Create a Pako Token

By creating an token and related contracts, you'll also learn how to handle money sent to to your contracts, which should come in handy if you want to create some kind of paid decentralised service in the future.

Therefore, for the sake of this chapter, let's imagine that our Pako DApp uses its own coin – the Pako Token. We will create two contracts – one for the token itself and one for the token crowd sale (the ICO).

Now Create your own Pako ERC20 Token and deploy it on a testnet. The Token should be to use openzeppelin contracts. You will use Harkhat development envirnoment. Also, write at least 20 automated tests. We will be using the Solidity and Typescript for dvelopment.

Project Part 4: Develop Crowd Sale Contract

Now the next decision you have to make is "how do I get these tokens to users?". This is usually done in one of three ways:

Owned Crowdsale — The Crowdsale contract owns tokens and simply transfers tokens from its own ownership to users that purchase them.

Minted Crowdsale — The Crowdsale mints tokens when a purchase is made.

Allowance Crowdsale — The Crowdsale is granted an allowance to another wallet (like a Multisig) that already owns the tokens to be sold in the crowdsale.

Other option is that we let an exchange handles this process.

In this part of the project we will implement the Owned Crowdsale strategy.

This contract will be responsible to allow users to exchange ETH for our Pako Token. In order to do that we need to Set a price for our token (1 ETH = 100 Pako Token)

Implement a payable buyToken() function.

Also may also see payable example.

Emit a BuyTokens event that will log who’s the buyer, the amount of ETH sent and the amount of Token bought

Transfer 75% the Tokens to the Crowd Sale contract at deployment time. i.e. Right after the contract is deployed, we want the token contract to send 75% of our token supply to it. While 25% remain in our personal "owner" account.

Transfer the ownership of the Crowd Sale contract (at deploy time) to our frontend address so that we are able to withdraw the ETH.

You can use the openzeppelin crowd sale contracts, however you will have to update the code to the latest solidity version.

Also write exentisive tests, for example we will simply send a transaction of 1 ETH from a random account to the contract. After the transaction, we should expect the account to have received Pako, while the contract's balance should have been reduced.

Note: Before you get started writing the token contract we suggest you review access control.

Project Part 5: Trying it with MetaMask

While it's always good to test your code, it's often more satisfying to see the results of your work wrapped in a nice UI. Let's see how we can deploy our contracts and get some Pako tokens into our MetaMask wallet!

We start by running our deployment scripts for the test network so that the new token contracts are uploaded and deployed.

When it's done, take note of what addresses the contracts was uploaded to and copy it!

Now head to MetaMask, and send a transaction of 1 ETH to the crowd sale contract address. If your MetaMask wallet doesn't have any ethers, remember that you can use any faucet.

After the transaction has confirmed, you might be confused about why you can't see any tokens in your wallet. It turns out that you need to manually add the token address in MetaMask in order to "register" it – after all, there are so many tokens out there, there's no way MetaMask could list them all by default!

To do this, open the side menu and click on the "Add token" button to get started:

Once you're on the token page, click on "Add custom token" and paste in the token contract's address in the address field.

After confirming that you want to add the token, you should be able to see your Pako balance right next to your ETH balance in the wallet. How cool!

Project Part 6: Trying it with Multisignature Wallets

Read

Now use [Gnosis Safe]{https://gnosis-safe.io/) with multi-sigs to do what you did in the last part.

Project Part 7: Sending Tokens using Ethers.js

Write a Typescript program to send Pako Token to some friend's address using Ethers.js.

You may follow this tutorial

Project Part 8 Advance: Create, Deploy, Mint, and Sell a NFT

Read this NFT tutorial series

Create a NFT contract using the OpenZepplen ERC721 NFT Standard.

You may use the Preset ERC721 contract.

Deploy your NFT contract on a testnet, mint it, and view it on the MetaMask wallet and list it on OpenSea Marketplace for sale.

Implement a ERC721 Market

The world of finance and software development is fusing. DeFi, Serverless, AI and IoT have merged. Our plan is to create the quintessential Unicorn Developer for this new age, who have a unique and rare skillset. They are basically individuals who on one hand can develop software and on the other mint money. They will be experts not only in serverless cloud computing technologies but also ninjas of the new token economy and decentralised finance. They will know not only to develop AI and IoT APIs but create a economic system where everyone can participate. In this repo we will focus on learning DeFi.

Our Text Books

Mastering Blockchain Programming with Solidity

Book Code

To Get Started

Zero to Hero: Web3.0 and Solidity Development Roadmap 2021

Read The Book: The Wisdom of Finance - Discovering Humanity in the World of Risk and Return

Watch “The Big Short” Movie

For complete details about this course visit Operation Unicorn website

Name		Name	Last commit message	Last commit date
Latest commit History 309 Commits
step00_hardhat_helloworld		step00_hardhat_helloworld
step01_hardhat_typescript_helloworld		step01_hardhat_typescript_helloworld
step02_hardhat_simple_storage		step02_hardhat_simple_storage
step03_solidity_tutorial		step03_solidity_tutorial
step04A_chap2_textbook		step04A_chap2_textbook
step04B_chap2_textbook		step04B_chap2_textbook
step05A_chap3_textbook		step05A_chap3_textbook
step05B_chap3_textbook		step05B_chap3_textbook
step06A_chap7_erc20_token		step06A_chap7_erc20_token
step06B_chap9_OpenZeppelin		step06B_chap9_OpenZeppelin
step06B_chap9_erc20_OpenZeppelin		step06B_chap9_erc20_OpenZeppelin
step07_chap8_erc721_token		step07_chap8_erc721_token
step08A_nft_erc721_OpenZeppelin		step08A_nft_erc721_OpenZeppelin
step08B_erc1155_Token		step08B_erc1155_Token
step08C_erc1155_TokenFractions		step08C_erc1155_TokenFractions
step09_withdrawal_design_pattern		step09_withdrawal_design_pattern
step10_access_restriction_design_pattern		step10_access_restriction_design_pattern
step11_factory_design_pattern		step11_factory_design_pattern
step12_state_machine_design_pattern		step12_state_machine_design_pattern
step13_fail_early_loud_design_pattern		step13_fail_early_loud_design_pattern
step14_wrapped_token_design_pattern		step14_wrapped_token_design_pattern
step15_gnosis_safe		step15_gnosis_safe
step16_chainlink_random_number		step16_chainlink_random_number
step17_chainlink_starter_kit		step17_chainlink_starter_kit
step18_upgradable_contract_design_pattern		step18_upgradable_contract_design_pattern
step19_dao		step19_dao
step20_real_estate_tokenization		step20_real_estate_tokenization
step21_dapp_architecture		step21_dapp_architecture
step21_helloworld_dapp		step21_helloworld_dapp
step22_node_providers		step22_node_providers
step23_the_graph_theory		step23_the_graph_theory
step24_the_graph_example		step24_the_graph_example
stepxx_solana_development		stepxx_solana_development
stepxx_yield_farming		stepxx_yield_farming
web3		web3
LICENSE		LICENSE
README.md		README.md
projects.md		projects.md
video_image.png		video_image.png

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Solidity Smart Contracts: Building DeFi DApps and Protocols for the Ethereum Blockchain

The Companion Dapp Learning Repo

Class Videos

We will take a 1 month Ramdan/Summer Vacation and do the following project during this vacation. The project is due after Eid. Classes will also continue after Eid.

Project 1: Create a Token and Launch ICO/IEO/IDO

Our Text Books

To Get Started

Blockchain and Serverless

DeFi

Metamask

Tokens

DeFi 2.0

About

Releases

Packages

Contributors 10

Languages

License

panaverse/defi-dapps-solidity-smart-contracts

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Repository files navigation

Solidity Smart Contracts: Building DeFi DApps and Protocols for the Ethereum Blockchain

The Companion Dapp Learning Repo

Class Videos

We will take a 1 month Ramdan/Summer Vacation and do the following project during this vacation. The project is due after Eid. Classes will also continue after Eid.

Project 1: Create a Token and Launch ICO/IEO/IDO

Our Text Books

To Get Started

Blockchain and Serverless

DeFi

Metamask

Tokens

DeFi 2.0

About

Topics

Resources

License

Stars

Watchers

Forks

Releases

Packages 0

Contributors 10

Languages

Packages