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.
Amoveo (VEO) is a highly scalable proof-of-work blockchain driven by its community and aimed for prediction markets, investment and insurance contracts, and various derivatives, such as stable coins. Amoveo is a blockchain meant for enforcement of investment and insurance contracts. Amoveo contracts are enforced using state-channels. This means fees are low, contracts are nearly instant and can support a global audience. Amoveo has oracle technology. Amoveo can learn facts about our world and enforce the outcome of contracts that are governed by these facts. This, for example, enables you to bet on the price of Amazon shares. The variables that define how to participate in Amoveo can be modified by the Amoveo community using a built-in process. This way Amoveo will always stay optimally tuned to produce the best results.