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.
Refereum uses the blockchain to directly connect developers and influencers, resulting in lower marketing costs and increased profits for everyone. In addition to more effective growth, Refereum strengthens engagement by offering cash prizes — enabling rewards for anything from an in-game high score to an eSports grand prize. We are working closely with Twitch and Unity, and anyone can play our open source demo today.