Blockchain projects

• https://github.com/Hsien-HsiuLiao/blockchain-ecommerce-app
• https://github.com/Hsien-HsiuLiao/multisig-wallet - deployed to netlify, kovan testnet
• https://github.com/Hsien-HsiuLiao/Decentralized-Autonomous-Organization
• https://github.com/Hsien-HsiuLiao/ETB-voting-app
• https://github.com/Hsien-HsiuLiao/Buy-Music-with-Ethereum-dApp

DeFi

• https://github.com/Hsien-HsiuLiao/DEX-erc20 - deployed to netlify, kovan testnet
• https://github.com/Hsien-HsiuLiao/fork-uniswap
• https://github.com/Hsien-HsiuLiao/defi-api - deployed to heroku
• https://github.com/Hsien-HsiuLiao/liquidity-mining

NFT

https://github.com/Hsien-HsiuLiao/nft-marketplace

Resources

Security

https://github.com/Hsien-HsiuLiao/smart-contract-best-practices

https://docs.soliditylang.org/en/develop/security-considerations.html?highlight=check%20effects#use-the-checks-effects-interactions-pattern - when writing functions, use Checks-Effects-Interactions Pattern

https://github.com/OpenZeppelin/ethernaut

https://blog.trailofbits.com/2018/10/19/slither-a-solidity-static-analysis-framework/

EVM

https://github.com/Hsien-HsiuLiao/evm-opcodes

https://docs.soliditylang.org/en/v0.8.5/assembly.html

https://kauri.io/#collections/A%20Deep%20Dive%20Into%20The%20Ethereum%20Virtual%20Machine%20%28EVM%29%20Series/a-deep-dive-into-the-ethereum-virtual-machine-%28ev/#evm-execution-state-overview

other

https://github.com/Hsien-HsiuLiao/defi-score

https://github.com/Hsien-HsiuLiao/brownie - A Python-based development and testing framework for smart contracts targeting the Ethereum Virtual Machine.

https://github.com/Hsien-HsiuLiao/create-eth-app

Notes

https://stackoverflow.com/questions/52690481/how-to-create-new-ethereum-solidity-contract-for-each-test-in-javascript-truffle

The .new keyword will deploy an instance of your contract in a new context.

But, .deployed will actually use the contract that you have deployed earlier i.e. when you are using truffle migrate command.

In the context of unit test, it's better to use .new so that you will always start with fresh contract.

https://twitter.com/zulhhandyplast/status/1026181801239171072

Use 'deployer.deploy(YourContract)' in your migration file if you want to store the contract address in the build directory.

If you use 'http://YourContract.new()', the address won't get saved in the build directory.

https://www.trufflesuite.com/docs/truffle/getting-started/interacting-with-your-contracts

https://web3js.readthedocs.io/en/v1.2.7/web3-eth-contract.html#new-contract

https://www.mycryptopedia.com/ethereum-abi-explained/ - ABI encoding is usually automated by tools that form part of the compiler or other software, such as wallets capable of interacting with smart contracts. The so-called ABI encoder requires at least a description of the contract’s interface including function names and parameter types. A common way to provide such a description is in a standardized JSON file.

https://kyber.network/ - Kyber is a blockchain-based liquidity protocol that aggregates liquidity from a wide range of reserves, powering instant and secure token exchange in any decentralized application.

https://0x.org/ - 0x API is a professional grade liquidity aggregator enabling the future of DeFi applications

Troubleshooting

If having errors running npm, Restore ownership of the user's npm related folders, to the current user, like this:_

sudo chown -R $USER:$GROUP ~/.npm

sudo chown -R $USER:$GROUP ~/.config

todo https://github.com/Hsien-HsiuLiao/blockchain-ecommerce-app

• migrate to HH ethers
• migrate to Typescript
• use risc0 to verify eth account purchased song and hhas access to play
• add ticker for stablecoins to bottom

https://github.com/Hsien-HsiuLiao/multisig-wallet

• migrate to HH, typescript

Buy-Music-with-Ethereum-dApp

• integrate DAO contract so band members can vote on profit distribution
• add contract to get nft after fan buys music
• implement rust backend to get song info, etc from db