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.
Scry.info is the world's first blockchain-based quantitative data providing and exchanging platform for storage, verification, utilization, analysis, sharing and trading of real world data. Interactions within the Scry community are made through Scry.info’s built-in smart contracts to access, share and utilize a wide spectrum of data, as fed and verified by the mass users on a distributed basis. Scry.info also enables users to customize industry/event-specific smart contracts to be applied to various scenarios and niches, such as polls or prediction markets in sports, entertainment, agriculture, financial market and so forth.