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.
VestChain is the unique blockchain platform that has full capacity to tackle the problems inherent to the existing blockchains, i.e that of expandability and time needed for confirmation. VestChain presents a decentralized accessible blockchain and cryptocurrency infrastructure; it is absolutely open source content management system. VestChain is promoting a smart contract platform, the main goal of which is to provide the most progressive properties no other platform is able to offer right now. The main feature of it is that it is the only one developed out of a scientific doctrine and a methodology putting research at the first place. A huge international team of highly-qualified engineers and scientists makes the core of the VestChain development process.