Certified Blockchain Solutions Architect (CBSA) — Question 44

Consider the following scenario: A solo app developer wants to create their own cryptocurrency and build a blockchain based that allows users to buy and sell second-hand items with that cryptocurrency from each other. Before the transaction is considered complete, the purchaser must put the funds in an escrow service and the sender must enter the courier tracking number into that same escrow. Time is of the essence and this developer doesn't want to worry about networking of infrastructure. This app must be fully autonomous or "decentralized".
Which architecture would best solve the product need?

Answer options

• A. Ethereum for token creation and escrow service; User-facing features built with web technologies and deployed through IPFS
• B. Ethereum for token creation; Traditional multitier API and database for escrow service; User-facing features built in web technologies then minified unto a String and deployed to an Ethereum Smart Contract
• C. Hyperledger Fabric for the escrow service and token creation using chaincode; User-facing features built with Hyperledger Composer
• D. The product cannot be built. Fully decentralized apps are not yet possible for user interface

Correct answer: B

Explanation

Option B is correct because it utilizes Ethereum for creating the token and incorporates a traditional multitier API and database for the escrow service, which is necessary for managing transactions efficiently. The other options either do not fully meet the requirement for decentralization or involve technologies that complicate the process, such as relying on Hyperledger which is less suited for public cryptocurrency transactions.