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.
Dash (DASH) is digital cash designed to offer financial freedom to everyone. Payments are instant, easy and secure, with near-zero fees. Built to support real life use cases, Dash is the leading decentralized payment solution. Users can purchase goods at thousands of merchants and trade it at major exchanges and brokers around the globe. Since its creation in 2014, Dash has demonstrated leadership in innovation and pioneered groundbreaking features such as: -Two-tier network with incentivized nodes and decentralized project governance (Masternodes) -Instantly settled payments (InstantSend) -Instantly immutable blockchain (ChainLocks) -Optional privacy (PrivateSend)