1. What is Vite?

Vite is a general-purpose platform for decentralized applications. It is designed to support industrial-strength applications by offering high throughput, low latency and scalability while also providing security.

The Vite team are dedicated to addressing current performance and scalability issues of infrastructural chains, so that truly practical applications with high-frequency data requirements can be built in a blockchain framework.

2. What is the relationship between Vite and Loopring?

Loopring is our strategic investor, and its founder Daniel Wang serves as Vite’s advisor. Loopring’s decentralized exchange function will be offered in a wallet application built on the Vite platform. Loopring will be the first practical use case for the Vite platform.

3. Will there be airdrops for Vite? In what way?

There will be. Stay tuned for amount and mechanism.

4. Which exchange(s) will Vite be listed on?

We are in contact with multiple exchanges, but there is no specific timetable. Vite is a long-term, tech-driven project, and we don’t plan to run our operations at an aggressive pace.

5. What is the public WeChat account of Vite?

Our official account: vitelabs

6. What is Vite’s biggest innovation as compared to other public chains?

The biggest innovation is the asynchronous design, which can be understood in three aspects:

First, we are introducing the concept of asynchronous design into smart contracts. The Nano project (one of three well-known chains that use DAG) separates a transfer action into a send and a receive transaction. We are building upon this mechanism, and will separate the call and the response of a smart contract, so they can take place asynchronously.

Second, the writing and verification of a transaction also happen asynchronously in Vite. In traditional blockchain setup (e.g., Bitcoin), the speed of writing transactions into a ledger is limited by the speed of packing. But Vite allows writing of many transactions into the ledger within the constraints of the TPS. Because the asynchronous setup allows the transactions to happen at an even speed, this reduces the peaks and troughs of the speed of transaction writing, thus optimizing usage of resources and increasing system throughput. Also, the transactions of two users will no longer be blocked; that is, we will no longer see a scenario where a user sends a large amount of transactions that prevents the transactions of other users from taking place.

Third, calls between contracts will also happen asynchronously in Vite. The calls between smart contracts in Ethereum are implemented through messaging (aka insider transactions); and the calls either all succeed or all fail, as per an atomic ACID semantic. To solve for this bottleneck in performance, we take a page from well-developed solutions in centralized Internet technologies, and will make use of a message-driven architecture. As such, contracts do not share states and communicate via messages.

7. Since smart contracts in Vite don’t support synchronous calls, how will such calls in Ethereum be compatible with Vite?

Unfortunately, these calls are not compatible with Vite. Synchronous calls need to be changed to asynchronous calls to work in Vite.

8. What is the difference between Vite's Solidity++ and Ethereum’s Solidity?

On a high level, the differences are similar to those of C and C++. In basic syntax, the two languages are largely compatible. The largest difference is in the synchronous (Ethereum) vs asynchronous (Vite) calls as mentioned earlier.

In addition, a series of standard libraries, such as string manipulation, floating-point operations, basic mathematical operations, containers, and sorting will be provided in Solidity++.

9. The message-based architecture has an advantage of high throughput and scalability. However, this comes at a cost of more complex programming model, which may not guarantee strong consistency, and may lead to even higher latencies. How does Vite reduce both the complexity in programming model and latencies?

Vite will provide Solidity++ contract language and a complete SDK to reduce the cost of asynchronous programming.

After rigorous research, we find that in practical use cases, strong consistency semantics can be replaced by BASE semantics. Since the HDPoS consensus algorithm of Vite can guarantee transaction confirmation within 1 second, any potential latency increase is still under control.

10. What is the significance of Snapshot Chain?

Vite employs a ledger structure called block-lattice. Each account corresponds to a blockchain and each transaction refers to the hash of the previous transaction in the account. Transactions are divided into two types: "request transactions" and "response transactions.” A response transaction needs to quote the corresponding hash of the request transaction.

The DAG structure has an inherent deficiency in security. This is because transactions are grouped by accounts, and each transaction is only attached to the chain associated with the relevant account. Transactions generated by other accounts do not automatically become the subsequent nodes of the previous transaction. Therefore, for some transactions, the rollback probability will not drop over time. The Snapshot chain technology is meant to address this issue.

11. Does the inter-chain protocol only support exchange of assets?

Yes. Vite will support value transfers between different chains but not other inter-chain functions such as message transfers or smart contract calls between chains.

12. The whitepaper mentions that Vite’s development tools are similar to, and have features extended from, those of Ethereum. Does this indicate that dApp’s for Ethereum can be deployed on Vite with minor changes?

Yes, one of Vite’s goals is to reduce the cost of porting over dApps from Ethereum. Vite tries to maximize compatibility with EVM.

13. Can Vite’s smart contracts support running on a mobile device? Will they be similar to Qtum and support mainstream languages like C++ and Java?

Vite won’t support mobile. There are no current plans to support other languages. In the future, we will set up a VM Lab to continue research in smart contract language and virtual machine. We welcome participation from experts in these areas.