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.
HashFuture is the next-generation blockchain platform for digital asset affirmation and circulation. As a platform and bridge linking the physical and digital world, HashFuture aims to solve the problem of digital assets property rights issues and cross-chain asset transfer. HashFuture develops the all-encompassed structure of 'protocol layer—technical layer—application layer' system based on blockchain technology to overcome the roadblocks on ownership recognition and transaction recording of digital assets. As a platform and bridge linking the physical and digital world, HashFuture aims to solve the problem of digital assets property rights issues and cross-chain asset transfer. HashFuture develops a brand-new three-dimensional, one-stop, digital assets affirmation and circulation platform on blockchain, using the structure of 'protocol layer—technical layer—application layer'.