Grin coin is a private & lightweight open source project based on the mimblewimble blockchain implementation. MimbleWimble is a lightweight blockchain protocol proposed by anonymous author that goes by the name Tom Elvis Jedusor (inspired by Harry Potter) in July 2016. Since then, the proposal has gained a huge following among Bitcoin and privacy advocates. Unlike bitcoin or ethereum, there are no addresses in Grin. In order to transact using Grin, both wallets must communicate with each other online with the results broadcasted to the network. Another key different is that transaction history (sender, receiver, amount) will not be recorded on the blockchain. Due to the removal of these information from the transaction, the data size remains small and that keeps the blockchain lightweight. New nodes can easily join the network without having to download a large blockchain. Grin coin was launched without an ICO, fundraising, or pre-mine. Developers around the world contribute openly with the goal to ensure the coin distribution remains as fair as possible. There are 2 popular wallets widely available to interact with the Grin network. Grin core wallet: https://www.coingecko.com/buzz/how-to-use-grin-wallet-to-send-receive-grin-coins Wallet713: https://www.coingecko.com/buzz/how-to-use-grin-wallet713-to-send-and-receive-grin-coin-step-by-step-guide The consensus algorithm used by Grin is the Cuckoo Cycle proof-of-work based. There are 2 hashing algorithms involved with Grin. Cuckoo-29 is meant for GPU mining while Cuckoo-31 is meant fo ASIC mining. This is a deliberate design to encourage miners to eventually move into ASIC mining for efficiency while keeping it fair at the beginning of the launch. Grin coin has launched its mainnet on 15th January 2019 and is now available for mining and trading.
Golem is a decentralized supercomputer that is accessible by anyone. The system is made up of the combined power of user’s machines from personal PCs to entire datacenters. Golem is able to compute almost any tasks from CGI rendering through machine learning to scientific learning. It utilizes an ethereum-based transaction system to clear payments between providers, requestors and software developers however it is safe because all computations take place in sandbox environments and are fully isolated from the hosts’ systems. The company released Brass in 2016 which includes Blender and LuxRender which are the two tools for CGI rendering. There are three releases that follows which are Clay, Stone and Iron. Golem has recently updated their Brass Beta and the highlight of this upgrade are the streamlined task creation GUI, the support for partial task restart in case of subtask timeouts and the fix that should alleviate the issues with the Docker service on Windows. Other than that, improvements have been made on the Blender verification and transaction tracking subsystems and fixed some minor pain-points in the UX. Transaction history will become more user-friendly with separate tabs for payments and incomes. Apart from that, improvements are made for requestors as well, requestors is now able to add resource file without having to repeat the task creation procedure if they have forgotten to add them beforehand. Grand vision and core features ● Golem is the first truly decentralized supercomputer, creating a global market for computing power. Combined with flexible tools to aid developers in securely distributing and monetizing their software, Golem altogether changes the way compute tasks are organized and executed. By powering decentralized microservices and asynchronous task execution, Golem is set to become a key building block for future Internet service providers and software development. And, by substantially lowering the price of computations, complex applications such as CGI rendering, scientific calculation, and machine learning become more accessible to everyone. ● Golem connects computers in a peer-to-peer network, enabling both application owners and individual users ('requestors') to rent resources of other users’ ('providers') machines. These resources can be used to complete tasks requiring any amount of computation time and capacity. Today, such resources are supplied by centralized cloud providers which, are constrained by closed networks, proprietary payment systems, and hard-coded provisioning operations. Also core to Golem’s built-in feature set is a dedicated Ethereum-based transaction system, which enables direct payments between requestors, providers, and software developers. ● The function of Golem as the backbone of a decentralized market for computing power can be considered both Infrastructure-as-a-Service (IaaS), as well as Platform-as-a-Service (PaaS). However, Golem reveals its true potential by adding dedicated software integrations to the equation. Any interested party is free to create and deploy software to the Golem network by publishing it to the Application Registry. Together with the Transaction Framework, developers can also extend and customize the payment mechanism resulting in unique mechanisms for monetizing software. Check out CoinBureau for the full review of Golem.