Proposed Blockchain-Based Data Tracking Solution

We propose a blockchain-basd solution and system for tracking data relevant to Covid-19. The system connects decentralized applications (DApps), dashboards, smart contracts, oracles and web feed sources within the same decentralized Ethereum network as illustrated in Fig. 3. The proposed framework collects data from various web feed sources (WHO, CDC, IHME, etc.) via oracles.
The proposed system components are described below:

Ethereum Smart Contract

The second-generation blockchain platform such as Ethereum enables smart contracts that act as software agents to be deployed in the blockchain network . Smart contracts can automatically execute the terms of the agreement and verify credible transactions without the interference from third parties . In our proposed solution, the blockchain system consists of three smart contracts as shown in Fig. 3.