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.
Reserve aims to build a stable, decentralized, asset-backed cryptocurrency and a digital payment system that scales supply with demand and maintains 100% or more collateral backing. Ultimately, Reserve’s goal is to create a universal store of value – particularly in regions with unreliable banking infrastructure and regions where hyperinflation is an issue. The Reserve system will interact with three kinds of tokens: (1) The Reserve token (RSV), which is a stable cryptocurrency that can be held and spent the way we use normal fiat money; (2) The Reserve Rights token (RSR), a protocol token used to facilitate the stability of RSV. (3) A growing variety of tokenized real-world assets (such as other stablecoins) that are held by the Reserve smart contract to back RSV.