QuarkChain is a secure, permission-less, scalable, and decentralized blockchain. One of the goals of QuarkChain is to utilize sharding technology to deliver over 1 million transactions per second (tps). Essentially, QuarkChain markets itself as a peer-to-peer blockchain with a high capacity throughput to help deliver fast and secure decentralized applications. The team behind QuarkChain created this blockchain to resolve the issue of scalability that all the major blockchains are currently facing. The team feels that because of the urgency of this issue, the Bitcoin community simply cannot afford to wait until they all agree on a solution. Instead, they feel that by offering different solutions, such as the one inherent in QuarkChain, this compels the community to split via a hard fork and find the solution that works best. QuarkChain encourages increased decentralization through multiple cheap nodes that then create a cluster that works as a super-full node. This prevents the high expenses associated with super-full nodes when the tps gets high. In terms of protection, all transactions within QuarkChain get the protection of 50 percent of the network’s hash power. This makes a double-spending attack incredibly challenging, particularly when combined with QuarkChain’s decentralized nature. QuarkChain relies on a two-layer blockchain structure. Sharding blockchains known as shards are the first layer, while the second layer is a root blockchain that confirms the shards’ blocks.The major work on QuarkChain began in Q2 2017 with research into the problem of blockchain scalability. In Q4 of that year, the team drafted the whitepaper. In February 2018, it released the white paper and completed verification code 0.1. March 2018 saw the 0.1 versions of both the wallet and testnet. Now in Q2, the team is working on the testnet 1.0 and smart contract 0.1. In Q4 2018, the team will have the QuarkChain Core 1.0, along with the mainnet 1.0 and the SmartWallet 1.0. By Q2 2019, both the SmartWallet and QuarkChain Core will be in their 2.0 versions. QuarkChain is a decentralized blockchain network that aims to resolve the issues of scalability that plague existing networks by using sharding technology. In this way, QuarkChain can dramatically extend the usefulness of blockchain technology since many applications are limited by the scalability of existing blockchain networks. The project is still in progress, but QuarkChain has already made many positive steps and already began invite-based beta testing for the testnet, showing significant progress and potential. The main features of Quarkchain are: 1. Reshardable two-layered blockchain: Quarkchain consists of two layers of blockchains. We apply elastic sharding blockchains (shards) as the first layer, and a root blockchain as the second layer that confirms the blocks from the first layer. The second layer that confirms the blocks from the first layer. The second layer is flexible to be resharded as needed without changing the root layer. 2. Guaranteed security by market-driven collaborative mining: To ensure the security of all transactions, a game-theoretic framework is designed for incentives, where at least 50% of overall hash powers are allocated to the root chain to prevent double spending attack on any transactions. 3. Anti-centralized horizontal scalability: In any blockchain network with a high TPS, a super-full node can be extremely expensive, which encourages centralization. In contrast, QuarkChain allows multiple cheap nodes forming a cluster to replace a super-full node. 4. Efficient cross-shard transactions: Cross-shard transactions in QuarkChain can be issued at any time, and confirmed in minutes. The speed of cross-shard transactions increases linearly as the number of shards increases. 5. Simple account management: There is only one account needed for the entire blockchain (shards) in QuarkChain. All cryptocurrencies from different shards are stored in one smart wallet.
Bitcoin Diamond (BCD) is a fork of Bitcoin that occurs at the predetermined height of block 495,866 and therewith a new chain will be generated as the BCD. Bitcoin Diamond miners will begin creating blocks with a new proof-of-work algorithm, and will consecutively develop and enhance the protection for account transfer and privacy based on original features of BTC. This will cause a bifurcation of the Bitcoin blockchain. The original Bitcoin blockchain will continue unaltered, but a new branch of the blockchain will split off from the original chain. It shares the same transaction history with Bitcoin until it starts branching and coming into a unique block from which it diverges. As a result of this process, a new cryptocurrency was created which we call “Bitcoin Diamond”. Bitcoin Diamond coin could win over a lot of Bitcoin users with its faster transaction times, lower fees and easier access to new users. Bitcoin is a hugely popular coin but it can be quite difficult to use! Many critics of Bitcoin argue that the coin won’t be a valid replacement for normal money until users can make small purchases; quickly and easily. A network offering these features will also appeal to small businesses dealing in low priced, high-volume goods like coffee or fast food. However, in my opinion the price of Bitcoin Diamond will have to be more stable before it attracts any big-brand clients like Starbucks or McDonalds. One of the main safety features of blockchain technology is encryption. Private personal information is hidden using computer code. Some critics of Bitcoin think that not enough user information is encrypted. For example, all transactions and their amounts can be seen by anyone using the Bitcoin network. This can make tracing the real identities of users fairly easy for governments and other organizations. The team behind Bitcoin Diamond wanted to encrypt more user information. However, they have recently decided not to add more privacy features to BCD. They feel that governments will soon start passing laws that stop cryptocurrencies from hiding user data. In a statement published on Medium, the team noted Japan and Russia as examples of this trend. Bitcoin Diamond is processing much larger blocks than Bitcoin in the same amount of time. Larger blocks mean more transactions and a quicker average transaction time. Bitcoin Diamond makes it easy to mine BCD with less powerful computers. GPU mining allows more users to get involved in supporting the network and this can only be a good thing. Bitcoin is the world’s top cryptocurrency but it’s still quite difficult to use. Diamond coin’s high transaction speeds and low price could make it perfect for buying and selling small and inexpensive products like coffee or bus tickets.