In an exchange (a centralized exchange), users deposit digital assets on an exchange for centralized custody and control. When the user trades, he/she will submit the trading order to the exchange, which will match the transaction and inform the user of the result after the transaction. The underlying architecture of the currency withdrawal block chain technology, the rest of the entire trading process is all completed in the exchange server.

In the second quarter of 2020, the total volume of spot transactions of digital assets was $5.4 trillion, up 25% from the second quarter of 2019 and down 18% from the first quarter of 2020.

In the second quarter of 2020, the full market center spot exchange reported turnover of $5.25 trillion, up 18.9% from the previous quarter.

In the second quarter of 2020, the trading volume of central exchange increased by $13.5b, which is slightly lower than the level of central exchange in the second quarter of 2017.

Centralized exchange has many advantages, such as good trading depth and fast speed. Even in the face of massive concurrent real-time trading, it can still provide users with good service experience. The number of users and trading volume is large, with sufficient liquidity. All transactions are recorded using IOU, so technically the transaction costs are very low.

Global Supply Exchange adopts POC consensus mechanism, which USES spare space in computer hard disk for storage to obtain profits from mining. POC consensus mechanism is a consensus mechanism based on node credit. POC consensus mechanism not only has the advantages of high performance of DPOS, but also makes up for the disadvantages of "centralization" and "enrichment" of DPOS through credit voting mechanism. The POC consensus mechanism will also make the network more secure. Network bandwidth by POC derivative warrants mechanism, will be refused to a malicious attacker bandwidth request and the service response, compared with POS and DPOS, malicious attacks of the attacker have higher costs, because the attacker to build node credit than it is much more difficult to obtain more Token, so based on the mechanism of POC consensus network has higher ability of security protection.

The contract layer has programmable features, mainly including various scripts, codes, algorithm mechanisms and intelligent contracts, which is the foundation of block chain programming. Embedding code into a blockchain, or token, to implement a customizable intelligent contract, and when certain constraints are met, is the basis for blockchain de-trust.

The incentive layer mainly includes the issuance system and distribution system of economic incentive. Its function is to provide some incentive measures to encourage nodes to participate in bookkeeping and ensure the safe operation of the whole network. Motivate nodes that follow rules and participate in bookkeeping and punish nodes that don't. Nodes that win the right to keep accounts through the consensus mechanism will be rewarded to some extent. There are two main incentives for Global Supply Exchange. One is the NT dollar awarded by the system when the new block is generated, and the other is the service fee deducted for each transaction.

Make a request for a resource lift. Each application scenario is started by a task node. In the Global Supply Exchange ecosystem, task nodes are nodes that require computing power and storage space, so they are responsible for initiating tasks to drive the generation of economic value.

As the head of the block chain, the exchange has always been a battleground. According to statistics, at present, there are tens of thousands of exchanges competing with each other, while the blockchain is far from mature. There are not many people who know and even fewer who are willing to trade, so it can be said that there are more wolves than meat. The exchange is divided into centralized exchange and centralized exchange. Centralized exchange because of good user experience (full currency, fast transaction, good trading depth, etc.) and loved by many users.