Vertcoin is a decentralized currency owned by its users, a P2P cryptocurrency in the same vein as Bitcoin and Litecoin. Like its two predecessors, Vertcoin exists solely as a currency, and it uses proof of work to reach distributed consensus. Unlike its two predecessors, however, Vertcoin is dedicated to keeping its mining functions decentralized, so contrary to most PoW coins, it’s ASIC resistant. Branding their project as “The people’s coin,” Vertcoin’s team believes that ASIC resistance invites a fairer, more democratized currency for both users and miners. Along these lines, Vertcoin sports its very own 1-click miner, a program meant to make mining more accessible to the general public. The motivation of Vertcoin was the fact that Scrypt-based ASIC mining chip that is used to mine Scrypt derivative coins such as Litecoin and Dogecoin is entering the mass market. That coupled with strong mining pool causes the strength of a cryptocoin to drop as it becomes easier for a specific party to pull a 51% attack and even monopolize the network. Scrypt-Adaptive-Nfactor was created to address that issue. Vertcoin is zero premined and as of the current design, only 84 million coins would ever be created. Vertcoin is said to be the next generation of coins due to its unique hashing algorithm. There may be more altcoins created based on this hashing algorithm in order to defend their network against ASIC miners. Like most all pre-2015 coins, Vertcoin took a deathblow after Mt. Gox was hacked, throwing the entire market into a crypto winter. As such, it was relatively inactive until the revival last spring/summer. Since then, it has had steady climb up the market cap ladder. A 2014 International Business Times article mentions Vertcoin as a potential Bitcoin successor. The article notes that it ''hopes to offer an alternative. By taking the foundations of Bitcoin and making some adjustments, Vertcoin punishes miners who use powerful machines and work together in 'pools' to monopolise the mining market.'' On July 1, 2014, Vertcoin released a wallet supporting Stealth Address transactions. On December 13, 2014 (block 208301), Vertcoin forked from Scrypt-Adaptive-N proof-of-work function to Lyra2RE as a proactive defense against emerging Scrypt-Adaptive-N capable ASICs. On August 10, 2015 (block 347000), Vertcoin forked from Lyra2RE to Lyra2REv2 because a botnet was controlling more than 50% of the hashing power of Vertcoin network. On May 7, 2017, Segregated Witness (SegWit) feature was activated in the main network. SegWit update includes the Lightning Network technology that was also demonstrated in action during the same day.'
ChainLink is a decentralized oracle service, the first of its kind. When Ethereum went live in 2015, it revolutionized what blockchain could bring to enterprise solution and traditional business. Blockchain was no longer just a medium for new age financial transaction, confined to Bitcoin’s potential to disrupt traditional currency exchange. With Ethereum powered smart contracts, Vitalik Buterin opened up a Pandora’s Box of use cases for blockchain technology. Problem is, per their design, smart contracts can only manage data on the blockchain. Their potential, the ability to provide tamperproof, decentralized applications for uses the world over, is still largely untapped, as many of the smart contract programs built on Ethereum lack a bridge to the real world industries they’re trying to improve. ChainLink’s first component consists of on-chain contracts deployed on Ethereum’s blockchain. These oracle contracts process the data requests of users looking to take advantage of the network’s oracle services. If a user or entity wants access to off-chain data, they submit a user contract (or requesting contract) to ChainLink’s network, and the blockchain processes these requests into their own contracts. These contracts are responsible for matching the requesting contract up with the appropriate oracles. The contracts include a reputation contract, an order-matching contract, and an aggregating contract. The first of these, the reputation contract, is exactly as it sounds: it checks an oracle provider’s track record to verify its integrity. In turn, the order-matching contract logs the user contract’s service level agreement on the network and collects bids from responsible oracle providers. Finally, the aggregating contract accumulates the collective data of the chosen oracles and balances them to find the most accurate result. Unfortunately, the ChainLink team does not offer a roadmap, but a testnet of ChainLink’s services should come sometime within Q1 of 2018. Generally, the project’s general lack of marketing and concrete updates have frustrated community members in the past. Sergey Nazarov, the project’s CEO, is known for a quiet community presence that favors of behind-the-scenes work on ChainLink. The team may not hype their project much, but for what it’s worth, they sacrifice brand marketing in favor of product development–and some community members find this focus to be refreshing. For instance, they’ve established an oracle with Swift Bank, and have a few quiet partnerships with zepplin_os and Request Network. Chainlink has the potential to connect smart contracts with the outside world. It may allow parties to smart contracts to be able to receive external inputs that prove performance and create payment outputs that end users want to receive, such as bank payments. This has the potential to allow smart contract to mimic the vast majority of financial agreements currently available in the market. With the ChainLink Network, anyone can securely provide smart contracts with access to key external data and any other API capabilities, in exchange for financial reward. Although it remains to be seen how the incentive system will operate, there is potential for rewards similar to those available for crypto miners to be available to Node Operators that provide useful data to the Chainlink network.' Check out CoinBureau for the complete review on Chainlink.