Below we introduce the details of the mechanism. The consensus mechanism mainly answers three questions：
a.Who will produce the block
b.When to generate a block
For problem c, in order to prevent the instability caused by the exorbitant right of the principal and the drift of the timestamp, at the implementation level, the PBFT (Practical Byzantine Fault Tolerance) algorithm is used to verify the validity of the block, considering the block validation and persistence. For the verification of the block, the method of all-node voting is adopted. When the new block is created, the de I eg a te node of the DPOS needstowaitforthevoting of other nodes, instead of having the right to write into the blockchain immediately. In the case where the number of nodes is 3f+1 and the number of nodes with a Byzantine fault does not exceed f, the blockchain data can guarantee consistency, namely：
i. If a correct node accepts and executes a block, all correct nodes submit the same block
li. All correct nodes are either behind the longest chain or consistent with the longest chain, and the block hashes of the same height are the same.
i、The user locks the specified tokens on the main chain through the API (token splitting by the main chain smart contract) and logically transfers it to the corresponding user account wallet in the transaction sub-chain.
ii、The user completes the transaction between the tokens and other tokens (or stable coin) through a series of operations such as placing an order and canceling the order.
After the API and the communication protocolareagreed,thefunction of the chain has been divided into multiple parts with a relatively low degree of coupling. In the implementation of Artfinity, the operation of the sub-chain is coordinated by the super-node, that is, the super-node is responsible for the block producing of the main chain and the sub-chain. Its structure is shown below：
Layer2 first obtains data x from the main chain, local storage unit, and the outside world; then completes the logical calculation (s, p, h)= f(x) and stores the computational verification process p in the local storage unit； finally the final result s and the calculation Hash h submitted to the main chain to complete the synchronization, the communication method for submission is described in c below. This completes a functional loop. For the authenticity of th。dataon the main chain, we can provide the hash value of the main chain data, and call the verification module g(p, h) in Iayer2 for verification.
According to the trade-off between security and throughput, Iayer2 usually has the following options：
a、Single node- has the fastest speed, but security and decentralization are weaknesses. An application scenario is a situation in which the decision process is multi-stage, the real-time requirements are high, and ultimately only the results are concerned.
b、Multi-copy state machine：Here we specifically refer to the Consortium blockchain, which runs the pbft consensus algorithm. It has a certain degree of decentralization and speed. It is a method that is a compromise of 1 and 3.
3、persistent voted oracle(PVO)
For each data d_i, try to get the data d'_ij in the same way as the one recorded in the PVO block, if：
a、d_i=d'_ij,then the tag data d_i is reproducible data；
As mentioned above, AT represents the value and the governance certificate of Artfinity ecosystem, with a total supply of 1 billion, which is issued by pre-mining methodology. The distribution plan is as follows：
a、Team： 200 million, unlocked in 36 months,unlocked1/36per month；
b、Fund Raising： 200 million, released all at the time when launching exchange；
c、Foundation： 500 million, where 100 million are for ecological partners, 100 million for business activities, 300 million for community incentives, released in four years.
1、The original application of blockchain： asset token generation, the consumption of asset token and the token-locking of nodes；
2、Payment of ecosystem services： deduction of exchange fee, trusteeship, traceability of asset, data inquiry, etc., is the exchange rate unit, and will soon become the transaction pair of the AT ecosystem in the cooperative exchange;
3、3.Community Governance Voting： AT holders can participate in Artfinity's public chain governance through open and transparent voting on the blockchain.
We abstract the growth of AT value as a "dual-channel growth mode"
Channel 1：Trading consumption leads to scarcity, scarcity leads to a price increase, and price increase attractsnew trading users
Channel 2：The node rewards promote the token-locking, the token-locking leads to scarcity, the scarcity leads to the price increase, and the price increase encourages the token-locking.