ethereum-solidity-notes.md

Ethereum Solidity Notes

Resources

NFT Markets

• niftygateway.com
• opensea.io

Language Docs

• https://learnxinyminutes.com/docs/solidity/

Video Walkthroughs

• https://www.youtube.com/watch?v=YJ-D1RMI0T0
• https://www.youtube.com/watch?v=xWFba_9QYmc
• https://www.youtube.com/watch?v=XLahq4qyors

Online IDE

• https://remix.ethereum.org/

A Basic Smart Contract

// SPDX-License-Identifier: GPL-3.0
// This tells the compiler to use 0.7.4 version of Solidity to compile
pragma solidity ^0.7.4;

// `contract` is kind of like `class`
contract Counter {
    // an unsigned integer state variable
    uint count;

    // when you compile (upload the ethereum network) this gets run once
    constructor() {
        count = 0;
    }

    // public makes this method available to people who have access to the contract
    // view means this is read only and doesn't modify any data
    function getCount() public view returns(uint) {
        return count;
    }

    function setCount() public {
        count = count + 1;
    }
}

Authorization

You can get the owner of the contract with

msg.sender = the Ethereum address of the user who deployed the smart contract