Consensus Mechanism of Wisdom Chain Document Knowledge BaseThis article comes from the official Twitter of Wisdom ChainURL:https://twitter.com/Wisdom_Chain/status/1297773797362335745?s=20At present, there is a consensus mechanism in the global public chain infrastructure. It stipulates how to compete between the nodes. The most popular consensus mechanism at this stage is OW, POS, DPOS, PBFT and DBFT. Its speed, safety and centralization degree have different emphasis. However, some public chains choose to use the hybrid consensus mechanism, such as ZIL adopts the POW+PBFT's mixed consensus mechanism, Wisdom Chain adopts the DPOS+Pow's mixed consensus mechanism, and what is the advantage of adopting the hybrid consensus mechanism?
First of all, the early Bitcoin and Ethereum adopted a single consensus mechanism, which resulted in their slow running speed and being unable to be used in the commercial environment. Although EOS uses the consensus mechanism of DPOS, all transactions are recorded by the super node on the chain, which has greatly improved the efficiency, but it has lost another major feature of the blockchain - the security brought by decentralization 。Therefore, the public chain with a single consensus mechanism is doomed to not have both efficiency, security and decentralization.Advantages of hybrid mechanismThe biggest advantage of hybrid mechanism is that it can learn from each other's strengths. Hybrid consensus means that two or more consensus mechanisms are applied to the underlying architecture of the same blockchain public chain. Reasonable use of mixed consensus can make up for the defects of low efficiency, loss of security protection or sacrifice of centralization degree caused by single consensus mechanism.
Wisdom Chain's ideas in this regard are quite creative. It adopts the hybrid mechanism of DPOS+POW, and the two accounts run simultaneously to make up for the disadvantage of any single consensus mechanism. DPOS mechanism has high efficiency. It is responsible for selecting legal transactions from the transaction storage pool, packaging them into blocks, and then broadcasting them to the network through P2P protocol. The implied POW requires miners to complete a certain amount of work proof to prevent the main chain from branching. At the same time, the elimination mechanism is established. If the nodes make false accounts or biased records within 30 seconds, they will be eliminated. As a result, speed, security and decentralization are taken into account.Of course, there are still some problems to be solved in the hybrid consensus mechanism, but any technology is not achieved overnight, and it is impossible to have a smooth journey. However, the Wisdom Chain team made a detailed and in-depth thinking on the key technical difficulties and put forward feasible technical solutions. In the future, with the popularization of blockchain technology, the problem of hybrid consensus mechanism will surely be solved one by one.