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.
Trade.io uses a peer-to-peer platforms to support the trading of a wide range of assets, and will be launching our own cryptocurrency, the Trade Token, which will be available to purchase via PRE-ICO from 7 November, 2017. The Trade Token is a utility token that enables frictionless transactions of a wide range of assets on the trade.io exchange whilst also acting as a medium of exchange and a store of value that could become more valuable in line with the growth of users and increasing use of the trading platform.