All about Blockchain & SmartContract Development on Solidity

Learn solidity basics by using the Remix editor, compiling with a specified compiler version, and declaring data types such as uint, int, and bool inside a contract.

Learn to declare and initialize string arrays in Solidity, compile and deploy a smart contract on a test network, and query values publicly by index while exploring other data types.

Define custom data types in Solidity with struct and initialize a public product, like a laptop with name, category, and place, while noting Solidity lacks floating point values.

Learn how addresses and mappings work in Solidity by creating a mapping from address to balance, exposing a public balance getter, and testing contracts before deploying on Ethereum.

Learn to use a Solidity constructor to initialize the owner from message.sender, expose a public change owner function with require validation, and test deployment and ownership updates on the blockchain.

Explore how a payable constructor enables sending ether to a smart contract and how a view function checks the contract's balance, with notes on gas, gas fees, and immutability.

Compare pure and view functions in Solidity, showing how pure functions avoid state reads and how view functions enable non-modifying reads to reduce transaction costs on the blockchain.

Explore creating and emitting events, and implementing a modifier to validate payable transfers in Solidity. Learn how msg.value and msg.sender affect transaction logging and access control during deployment and testing.

Learn to pass arguments to a Solidity modifier, handle payable transfers, verify balances, and read logs and events from successful transactions.

Compare memory and storage variables in Solidity, detailing how memory variables are temporary and cheaper, while storage variables persist as contract state, participate in mining, and incur higher costs.

Explore storage vs memory in Solidity with a hands-on smart contract example. Learn how storage variables affect the blockchain state and gas costs, while memory provides cheaper, temporary data copies.

Map each address to its balance with a public mapping in a smart contract. Build a simple bank that checks for sufficient balance before transfers.

Use a balance-checking modifier to ensure the sender's balance, stored in a mapping, is sufficient before withdrawal or deposit operations in a solidity smart contract.

Learn how to implement a deposit function in a Solidity smart contract that records each sender's balance in an account list by updating a mapping with the sent value.

Learn how to implement the withdrawal fund functionality in Solidity: validate balance, ensure sufficient funds, and transfer ether to the sender while updating the accounts list.

Develop a Solidity function to check smart contract's total balance at any time, using a public view function that returns the contract's balance as a uint, and prepare to test.

Compile and deploy a smart bank Solidity contract, then test end-to-end deposit, withdraw, and balance features, including total bank balance and assets.

Copy the license identifier to the top of your smart contract to remove compilation warnings about license issues.

Follow a roadmap to become a job-ready blockchain developer: learn a framework (truffle or hardhat), test locally, deploy, then build a React front end and a Node.js API for a DApp.