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Solidity News Friday, June 1

How to Make a Dapp of a pet shop using Solidity and Truffle!

  • contarcts directory: Solidity source files that describe the Smart Contract – – – – – migrations directory: migration system to be used when deploying the Smart Contract – – – – – test directory: Test files written in Javascript and Solidity – – – – – truffle.js: Truffle configuration file…
  • pragma solidity ^0.4.4; – contract Adoption { – address[16] public adopters; – function adopt(uint petId) public returns(uint) { – require(petId = 0 petId = 15); – – adopters[petId] = msg.sender; – return petId; – } – – function getAdopters() public returns (address[16]) { – return adopters; – } – }…
  • js – Deploying Adoption… – … Adoption: successful migration to network… – … artifacts… – – With that, you can create a Smart Contract, compile it, and deploy it in the test block chain of the local environment.
  • In Truffle, the automatic test of the Smart Contract can be described in both javascript and Solidity, but here we will write in Solidity.
  • Assert.sol: Various checking work during Obtain the address of the contract deployed at the test time – – Adoption.sol: Test the Smart Contract – – – – Create a contract called TestAdoption and declare the variable adoption.

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How to Make a Dapp of a pet shop using Solidity and Truffle!

Explaining unexpected reverts starting with Solidity 0.4.22

  • Because of that, the return value was deemed unnecessary and contracts were written that had the following function: – – These contracts are not ERC20 contracts.
  • If you implement a contract that inherits from a contract or an interface that is identical to the ERC20 specification, but contains the function without return parameters, the compiler will complain that you did not properly override the function.
  • Calling the function on a contract that is not ERC20 compliant because it returns the wrong type worked before Solidity 0.4.22.
  • This check worked, even though the called contract did not return anything, because there was garbage written in memory at that point and most of the time, this garbage is not 0, but some of the other 2-1 values (0 is the only representation of ).
  • Explicit type conversions between contracts are allowed in Solidity, but the compiler has to trust the user that this is the right thing to do.

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Explaining unexpected reverts starting with Solidity 0.4.22

Meetup #1: Blockchain overview, Ethereum and Smart Contract with Solidity

  • — This is a FREE meetup — – – – – This meetup is for anyone interested in Blockchain, Distributed Ledger Technology, Ethereum, Hyperledger, and more.
  • Exciting sessions planned in this meetup with focus on Blockchain – – Speakers will be announced soon.
  • Agenda – – – – 09.45am – 10.00am – Welcome & Introduction (Citrix) – – 10.00am – 11.00am – Session to be announced (speaker from Citrix) – – 11.00am – 11.20am – Tea break – – 11.20am – 12.20pm – Hands-on session on writing your first smart contract with Etherium…

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Meetup #1: Blockchain overview, Ethereum and Smart Contract with Solidity

Top Solidity Courses

Getting Started with Ethereum Solidity Development (6,530 students enrolled)

By Sebastien Arbogast
  • Understand the basic philosophy behind the blockchain and distributed/decentralized applications
  • The basics of how a blockchain generally works, just enough to be able to use it as a development platform
  • Develop a distributed application, from creating a blank project to deploying it in production all the way through writing smart contracts, unit testing them, and creating a user interface for them
  • How to combine the right tools to put together a consistent development environment
  • The fundamentals of the Solidity smart contract language
  • How to use the Truffle build and testing framework
  • How to deploy a decentralized app to various Ethereum instances (testrpc, private chain, test chain, main net)

Learn more.


Ethereum Blockchain Developer: Build Projects Using Solidity (10,937 students enrolled)

By Ravinder Deol
  • Be Proficient In Solidity Programming By Building Projects In This Course.
  • Understand Blockchain Technology At A Theoretical And Practical Level.
  • Be Aware On A Practical Level Of How Smart Contracts Operate.
  • Be Able To Work With The Ethereum’s Major Core Development Tools.
  • Understand The Core Development Functions Of Ethereum.
  • Understand What Decentralisation Is As We’re Working With This Technology.
  • Be Able To Explain The Structure Of A Solidity Clearly Through Practical Examples.
  • Understand How To Use Web3 In Conjunction With The Project We’re Creating.
  • Be Proficient In Advanced Development With Truffle And Ethereum Studio.
  • Complete A Final Assignment Which Consists Of An Ethereum Blockchain Based Curriculum Vitae.

Learn more.


Ethereum : Decentralized Application Design & Development (9,794 students enrolled)

By Rajeev Sakhuja
  • Leverage the Ethereum tools/software such as Wallet, Geth, MetaMask, Remix, TruffleV4, Ganache....
  • Create an ERC20 Compliant token to launch an Initial Coin Offering (ICO)
  • Setup Private Blockchain Network
  • Develop Smart contracts in Solidity using multiple tools such as Web3/Ganache/TruffleV4/Mocha framework
  • Comfortably describe how Ethereum Blockchain works | Ethers, Gas, POW, POS, Nodes ...
  • Describe how the Blockchain technologies work | Distributed Ledgers, Consensus, Mining ....
  • Develop UI/front end for Decentralized Application in HTML/CSS/Javascript using web3 libraries
  • Develop end to end Decentralized Applications (DAPP) on Ethereum platform
  • Setup private Ethereum networks for development & experimentation
  • Identify and use the right design patterns for developing smart contracts
  • Architect, Design & Build real use cases on Ethereum platform

Learn more.


The Complete Ethereum Course: Get .001 Ether In Your Wallet (4,273 students enrolled)

By Ravinder Deol
  • Understand how Ethereum, the emerging cryptocurrency works, and get involved with it practically as well as learning the theoretical side of the cryptocurrency.
  • Realise how becoming an early adopter of Ethereum gives you the best chance to capitalize on its rise, as many would have missed the meteoric rise of Bitcoin.
  • Undertake your first ever Ethereum transaction by receiving .001 Ether from me for completing this course, I will of course walk you through how to setup your wallet.

Learn more.


Compile Your First Ethereum Smart Contract With Solidity (245 students enrolled)

By Will Bunker
  • Compile a basic smart contract
  • Set a private blockchain for testing
  • Deploy smart contract to blockchain
  • Call the functions on smart contract.

Learn more.


Learn Solidity: Programming Language for Smart Contracts (3,153 students enrolled)

By Toshendra Sharma
  • Develop Ethereum Smart Contracts using Solidity
  • Understand the basics & advance features of Solidity & Ethereum Virtual Machine
  • Develop their own decentralized blockchain applications

Learn more.