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.
Launched in 2015, EDC Blockchain is a global multi-currency platform with a built-in constructor of coins. All EDC holders are merged into master nodes, which are a certain kind of fund in which users donate their coins, thereby allowing the node to mine EDC. Based on a hybrid LPoS mining algorithm and using Bitshares 2.0 Graphene protocol, EDC provides network security when implementing important functions, such as instant confirmation of transactions, as well as ensuring network voting. The last EDC coin will be produced on January 1st, 2040. The EDC community exceeds 1 million users, while the cryptocurrency is used by people living in 57 countries throughout the world. EDC is actively developing in the Southeast Asia, Latin American and European markets.