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.
The Diverse and Utility Token with Co-Blockchain. Asian Fintech (Afin) provide online business platform for various business entrepreneurs and companies and bring them on Blockchain platform to applications for business platforms in those fields. Afin is incorporating Blockchain technology to expand and diversify the business of Afin and its partners. It is cost effective and convenient for both the sellers and the buyers Afin has developed Co-BlockChain as well. The ERC-20 was used for the major currency, Afin Coin. And chose the SCP standard for the AfinS coin blockchain, which is a secondary currency for the efficiency of payment and transfer.