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.
GREENPOWER has been designed to serve as a global rewards currency. GREENPOWER was developed on world-class blockchain technology (Graphene) and features a highly-efficient operating model. The system confirms transactions in just three seconds and has the capacity to process over 100,000 transactions per second. The currency has a fixed supply of coins that has been distributed during the past two years to over 150,000 accounts in over 180 countries. GREENPOWER is a store-of-value unit at the center of an ecosystem of companies, each of which is working synergistically to enhance the overall value for all participants. GREENPOWER is intended to be the currency used as loyalty rewards by millions of merchants worldwide.