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Solidity News Tuesday, May 8 Solidity, Solidity language, Xrp crypto coin & more…


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Tags: Solidity, Solidity Development, Solidity Language, video courses, high-level human-readable code


  • Ripples XRP crypto coins price is going up every fifteen minutes on average.
  • Ripples current value seems to be utterly unaffected by such comments but, in general, those thoughts could affect the whole crypto industry (at least within the US).
  • XVGs partnership with the Mindgeek (a big player in the porn/adult entertainment industry) kind of stopped growth.
  • This could make XVG the first cryptocurrency to be relevant in the very rigid (even more in Europe, even more in Germany) banking industry.
  • Global Coin Report and/or its affiliates, employees, writers, and subcontractors are cryptocurrency investors and from time to time may or may not have holdings in some of the coins or tokens they cover.

Tags: XRP crypto coin, FIB retracement level, porn/adult entertainment industry, XVG debit cards, latest cryptocurrency news


  • For Seedom, we want a method that runs on-chain, requires only a single participant transaction and generates a random number that is globally available to all participants.
  • Seedom then reveals their secret message in a future block, using the future blockhash of the reveal transaction block number as an additional source of entropy.
  • With a random entry number, the corresponding participant is found using a binary search into a dynamic array of Seedom funding instances constructed during the participation phase.
  • This process loops a set amount of times, as defined by the entropy number supplied during Seedom fundraiser contract deployment, using the participants message at each step as part of the seed for the next random number.
  • Our random number generation method creates a random path through a subset of the immutable participants and their corresponding messages to add additional entropy to the participant selection process.

Tags: random number, random entry number, random number generation,


Tags: Telegram, Blockchain Forums,


  • Here is an example of how this could actually be used: – – This contract can only do one thing and that is to self-destruct, and the guard ensures that no account other then the owner can call the function successfully, meaning that in this case, the account that created…
  • This example is of course not very useful, but we can easily think of others, like a Token contract where its possible for users to buy and sell tokens, but only the owner can do important things like adding users, banishing them, or issuing new Tokens.
  • This contract helps warding against the problem of bad input by dividing ownership transfer up into two parts: – – The way this is implemented is by storing the address of a candidate in a separate field, instead of directly replacing the owner.
  • Note that while this protects against some mistakes on the account of the owner it is still not entirely safe; for example, the computer run by the owner could be afflicted by a virus or something else that would hijack their calls and perhaps edit the candidate address, which in…
  • One solution to that type of issue would be to add an additional step: – – A safe transfer of ownership function will reduce the risk of a contract being locked down, because it helps avoid a situation where nobody is allowed to transact to it; especially when a contract…

Tags: Data Protection Router, blockchain-based Data Protection, contract, candidate address, open source contract


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.