Smart contracts on Ethereum are fully self contained and any information or access to off-chain data is restricted. Tellor solves this problem by creating a system where parties can request the value of an off-chain data point (e.g. ETH/USD) and miners compete to add this value to an on-chain data bank, accessible by all Ethereum smart contracts. Inputs to a data series are secured by a network of staked miners. The main Tellor smart contract creates a time series of each requested data series and aims to become the standard source of high value data for decentralized applications. This oracle, “Tellor”, utilizes similar incentive mechanisms to other cryptocurrency systems through the issuance of Tellor’s token, Tributes, that are used to request a particular data series from miners.
What Is EOS? EOS has always been one of the most hype over ICO and now a smart contract platform. When it was announced by founder Dan Larimer in New York City in May 2017, a giant jumbotron advertisement could be seen glowing over Times Square. In the first 5 days of their ICO token sale, EOS raised an unprecedented $185 million in ETH — all without having any kind of product or service yet. EOS claims to be “the most powerful infrastructure for decentralized applications.” Basically, EOS is (or, rather, will be) a blockchain technology much like Ethereum. They plan to create their own blockchain with a long list of impressive features. Some are even calling EOS the “Ethereum killer.” But along with all the hype and excitement about EOS, there’s also a large amount of skepticism coming from the crypto community. The EOS Vision EOS has big plans. It will be a software that will act as a decentralized operating system. Developers can then build applications on the EOS software. It will be highly scalable, flexible, and usable. The most notable feature that everyone is getting excited about is horizontal scalability — what this means is the EOS blockchain will be able to allow parallel execution of smart contracts and simultaneous processing of transactions. This could be a real game changer. EOS will incorporate the delegated proof-of-stake (DPoS) consensus protocol, created by founder Dan Larimer himself. This system is less centralized, uses far less energy, and is incredibly fast — as in, up to millions-of-transactions-per-second fast. Furthermore, there will be no user fees on the EOS blockchain. This would also set them apart from the competition and could help them gain more widespread adoption of their platform. EOS also wants to put a blockchain constitution in place to secure user rights and enable dispute resolution. As explained in their technical whitepaper: 'The EOS.IO software is designed from experience with proven concepts and best practices, and represents fundamental advancements in blockchain technology. The software is part of a holistic blueprint for a globally scalable blockchain society in which decentralized applications can be easily deployed and governed.' Tokens that are issued on top of the EOS platform includes Everipedia, HorusPay, Meet One, and more.