Smart Contract Mastery: The Complete Solidity Guide

Explore the evolution of the web from web 1.0 to web 3.0, highlighting decentralized ownership, permissionless participation, native payments, and trustless incentives.

Explore Ethereum, a decentralized platform for building smart contracts and decentralized applications, where transparent, secure blockchain transactions run on a network of nodes without intermediaries.

Explore how gas, the Ethereum unit of computational effort, drives transaction fees with gas price, gas limit, base and priority fees, measured in gwei and ether.

Explore ethereum networks: mainnet, testnets, and layer 2s, and learn to add them to metamask with chainlist. Ensure you’re on the right network before sending transactions or interacting with contracts.

Explore Solidity data types, including value types such as signed and unsigned integers, booleans, addresses, enums, strings, and bytes, plus reference types like fixed and dynamic arrays, structs, and mappings.

Explore Solidity functions: declare with function, name, parameters, and public visibility, return a uint256, and optimize with pure to reduce gas; deploy and call in Remix.

Learn how modifiers in Solidity enforce conditions and pre and post processing actions by applying reusable code to functions, using require to revert transactions when conditions fail.

Explore visibility specifiers in Solidity, including public, private, internal, and external, and see how public state variables auto-create getters while internal hides outside access, allowing inheritance.

Override base Solidity functions in child contracts with virtual and override keywords, and test behavior in Remix, noting when pure or view modifiers apply.

Explore Solidity's integrated functions, including addmod, mulmod, block and transaction data, array operations, and hash utilities like keccak256, to streamline contract development.

Learn how to use Sepolia faucets, including Alchemy, to obtain testnet eth for development. Connect your Ethereum address, complete the captcha, and receive 0.5 Sepolia eth via faucet.

Define the state variables for a voting project in solidity 0.8.18–0.9.0, including voter and proposal structs, chairman, a public proposals array, and a mapping of voters by address.

Learn to implement the ability to vote in a Solidity contract via remix, with public AbilityToVote function restricted to chairman, checks that the voter hasn't voted yet, and weight assignment.

Learn how to implement a public function to compute the winning proposal in Solidity by looping through proposals, tracking the highest vote count, and returning the winning index in Remix.

Create a public view function in Solidity to return the winner's proposal name by accessing the winningProposals index and returning proposal.name, using memory for the string.

Define and grant a default admin role using OpenZeppelin's access control, then expose a public mint function guarded by onlyRole(defaultAdmin) so only authorized admins can mint ERC20 tokens.

define the state variables for this solidity smart contract by creating a bank contract, setting the solidity version, and declaring a private balance mapping and an owner address.

Define the constructor in Remix, set the owner to msg.sender, make it payable, and initialize the bank balance with msg.value.

Define a payable public deposit function with positive value, update the sender's balance, add public balance checks for customers and the owner, and prepare a withdraw function.