CN115994824A - Cross-chain transaction method for digital asset based on cross-trusted alliance chain - Google Patents

Abstract

The invention relates to a digital asset cross-chain transaction method based on a cross-trusted alliance chain, and belongs to the technical field of blockchain. The method includes: a cross-chain points clearing smart contract is published on the trusted alliance chain, and the following steps are performed: receiving asset release information, assigning asset numbers, and synchronizing asset release information; receiving asset query requests, returning asset numbers; receiving asset purchase requests, Synchronize point transfer information; mark asset purchase request as purchase success; receive asset delivery verification request, if the status of corresponding asset purchase request is purchase success, then feedback to allow delivery; business system receives digital asset delivery request and sends it to cross-chain points clearing smart contract Asset delivery verification request, if the feedback that the delivery is allowed is received, a digital asset delivery transaction will be generated and packaged into the current block storage. The present invention realizes cross-chain transaction of digital assets through cross-chain points clearing smart contract, promotes cross-chain circulation of digital assets, and is easy to popularize and apply.

Description

Digital asset cross-chain transaction method based on cross-trusted alliance chain

technical field

The invention belongs to the technical field of block chains, and in particular relates to a digital asset cross-chain transaction method based on a cross-trusted alliance chain.

Background technique

Network accounting, office automation, and electronic payment system platforms in the Internet age have given the current production methods incomparable advantages over traditional production methods. The characteristics of digital assets are: expensive, highly dependent, highly interactive, unlimited in quantity and decreasing in cost. The circulation of digital assets can bring economic benefits to users. Blockchain is a decentralized distributed database system with the characteristics of openness, transparency, immutability and traceability. It can provide credible evidence for data, strongly support the fixation of corporate office data, and help identify and resolve disputes. At present, a large number of institutions and enterprises have established business private chains or participated in industry alliance chains. However, there is a lack of a medium for the exchange of digital assets between blockchains of different institutions between the private chains or alliance chains that have been built by different enterprises or institutions. Digital assets are exchanged between different institutions through credit media, and credit media lacks production sources. There is a strong bond between the point medium and the actual value of the data asset, and there is a risk of point speculation. Therefore, it is necessary to study new technologies for cross-chain transactions of digital assets.

For example, Chinese patent CN111581251A, published on August 25, 2020, discloses a digital asset query method, device, and storage medium for cross-chain transactions. The method includes: receiving a digital asset query request, and the digital asset query request is based on participation Any transaction party of the cross-chain transaction is released through the smart contract; according to the digital asset query request, an authorization request is sent to the corresponding digital asset authorizer; when the authorization information is received, the authorization information is sent to the transaction party, The transaction party is made to query corresponding digital assets according to the authorization information. Its technical solution performs unified storage and management of digital assets through a third-party blockchain, realizes unified query of cross-chain data assets, and meets different data query needs of different users for the transaction process. However, its technical solution cannot realize cross-chain transactions of digital assets, and lacks a mechanism to maintain transaction stability. Therefore, how to overcome the shortcomings of existing technologies is an urgent problem in the field of blockchain technology.

Contents of the invention

The purpose of the present invention is to solve the deficiencies of the prior art and provide a digital asset cross-chain transaction method based on cross-trusted alliance chains.

To achieve the above object, the technical scheme adopted in the present invention is as follows:

Based on the cross-chain transaction method of digital assets across trusted alliance chains, there is a cross-chain points clearing smart contract issued on the trusted alliance chain, the cross-chain points clearing smart contract is connected with the business system of the trusted alliance chain, and the cross-chain points clearing smart contract Perform the following steps:

(1) Receive the asset release information sent by the business system, and assign an asset number to the asset; the asset release information includes the identity of the issuer, asset description information, and credit selling price;

(2) Synchronize asset release information between several cross-chain point clearing smart contracts;

(3) Receive the asset query request sent by the business system, and return the asset number of the corresponding asset;

(4) Receiving the asset purchase request sent by the business system, the cross-chain point clearing smart contract generates point transfer information and assigns a purchase request number to the asset purchase request; the asset purchase request includes the asset number and the buyer's identity; the point transfer The information is to transfer the points corresponding to the selling price of the points from the account corresponding to the buyer's identity to the account corresponding to the publisher's identity;

(5) Several cross-chain point clearing smart contracts synchronize point transfer information;

(6) After the cross-chain point clearing smart contract that receives the asset purchase request finds that the point transfer information has been synchronized by several cross-chain point clearing smart contracts, it marks the asset purchase request as a successful purchase;

(7) Receive the asset delivery verification request sent by the business system. If the status of the asset purchase request corresponding to the asset purchase request number is purchase success, feedback to the business system that the delivery is allowed, otherwise, feedback to the business system that the delivery is not allowed; the assets The delivery verification request includes the corresponding asset purchase request number;

(8) The business system receives the digital asset delivery request. After receiving the delivery permission feedback, the business system sends an asset delivery verification request to the cross-chain points clearing smart contract. If it receives the delivery permission feedback, it generates a digital asset delivery transaction and packs it into the The current block is stored, otherwise, no operation is performed; the digital asset delivery request includes the asset number and the asset purchase request number.

Further, it is preferred that the cross-chain credit clearing smart contract has a credit account, a credit table and a token account;

the points account records points owned by the points account;

The credit table records the credits owned by blockchain users;

The cross-chain point clearing smart contract is preset with a settlement account period. Before the settlement account period, when the token account of the cross-chain point liquidation smart contract receives the token transferred from the blockchain user, the contract point account Transfer the corresponding number of points to blockchain users and record them in the point table. During the settlement account period, the cross-chain points clearing smart contract converts the points of blockchain users into a corresponding number of tokens and transfers them to into the blockchain user's account.

Further, it is preferred that several of the cross-chain points clearing smart contracts vote to determine the next settlement account period and the initial point distribution after the settlement account period ends, and during the settlement account period, several of the cross-chain point clearing smart contracts The contract converts points at the agreed token exchange price, so that the points held by the cross-chain points clearing smart contract after conversion match the initial point distribution.

Further, it is preferred that during the settlement account period, several of the cross-chain points clearing smart contracts pay taxes by multiplying the points assigned by the initial points by a preset ratio. After all taxes and fees are paid, the cross-chain point Evenly distributed between liquidation smart contracts.

Further, it is preferred that during the settlement account period, several of the cross-chain points clearing smart contracts each package and store all asset purchase requests in the corresponding blockchain, and then several of the cross-chain point clearing smart contracts will Points cleared.

Further, preferably, the method of voting to determine the initial distribution of points includes:

After the settlement account period is over, several of the above-mentioned cross-chain points clearing smart contracts will convert the points of the corresponding blockchain users into a corresponding number of certificates, and transfer the points to the points account;

A number of said cross-chain point clearing smart contracts count point usage, and the cross-chain point clearing smart contract with the most point usage is the voting initiator, and the voting initiator generates an initial point distribution plan and initiates a vote;

If the cross-chain point clearing smart contract exceeding the preset ratio agrees to the initial point distribution plan, the initial point distribution plan will be passed, and the initial point distribution will be carried out according to the initial point distribution plan.

Further, preferably, the total amount of points used for distribution is fixed, and the method for the voting initiator to generate an initial point distribution plan includes:

The total amount of points is divided into three parts in proportion, the first part is directly allocated to the voting initiator, the second part is generated by the voting initiator, and the third part is recorded as N, and the voting initiator receives other cross-chain Calculate the application amount reported by the point clearing smart contract, calculate the total amount of application, and calculate the proportion of the application amount reported by each cross-chain point clearing smart contract to the total application amount, and the proportion will be used as the distribution ratio of the corresponding cross-chain point clearing smart contract. The product of the third part of the point amount N and the distribution ratio is used as the point distribution amount allocated to the corresponding cross-chain point clearing smart contract, and the distribution summary of the three parts is used as the initial point distribution plan.

Further, preferably, the method of agreeing on the exchange price of the certificate includes:

Several cross-chain point clearing smart contracts each generate a token exchange price, randomly generate an obfuscation code, extract the obfuscation code and the hash value of the exchange price and send it to the voter;

After receiving the hash value sent by all the cross-chain point settlement smart contracts, the voting initiator notifies all the cross-chain point liquidation smart contracts to disclose the token exchange price and obfuscation code;

Several cross-chain points liquidation smart contracts calculate the product of their initial points and bids, freeze the corresponding number of tokens, and unfreeze the tokens during the settlement account period;

The voting initiator extracts the token exchange price and the hash value of the obfuscation code published by the cross-chain point clearing smart contract, and compares and verifies it with the received hash value;

If the verification is inconsistent, it will be determined that the agreed token exchange price is illegal, and the agreed exchange price method will be re-executed. Otherwise, the weighted average of all token exchange prices will be calculated with the initial points as the weight, as the agreed token exchange price .

Further, preferably, the voting initiator calculates the allowed bid range;

The allowable bid range is k1 to k2 times the exchange price of the previous settlement account period. A bid of k1 times is regarded as k1 times of the token exchange price of the previous settlement period, and a bid higher than k2 times of the token exchange price of the previous settlement period is regarded as k2 times of the token exchange price of the previous settlement period.

The present invention also provides a digital asset cross-chain transaction system based on a cross-trusted alliance chain, which is used to implement the above-mentioned digital asset cross-chain transaction method based on a cross-trusted alliance chain. The system includes several cross-chain gateways and several A cross-chain point clearing smart contract; the cross-chain point clearing smart contract is published on the business block chain, and several cross-chain point clearing smart contracts are connected through the cross-chain gateway, and the cross-chain point clearing smart The contract performs the following steps:

(1) Receive the asset release information sent by the business system, and assign an asset number to the asset; the asset release information includes the identity of the issuer, asset description information, and credit selling price;

(2) Synchronize asset release information between several cross-chain point clearing smart contracts;

(3) Receive the asset query request sent by the business system, and return the asset number of the corresponding asset;

(4) Receiving the asset purchase request sent by the business system, the cross-chain point clearing smart contract generates point transfer information and assigns a purchase request number to the asset purchase request; the asset purchase request includes the asset number and the buyer's identity; the point transfer The information is to transfer the points corresponding to the selling price of the points from the account corresponding to the buyer's identity to the account corresponding to the publisher's identity;

(5) Several cross-chain point clearing smart contracts synchronize point transfer information;

(6) After the cross-chain point clearing smart contract that receives the asset purchase request finds that the point transfer information has been synchronized by several cross-chain point clearing smart contracts, it marks the asset purchase request as a successful purchase;

(7) Receive the asset delivery verification request sent by the business system. If the status of the asset purchase request corresponding to the asset purchase request number is purchase success, feedback to the business system that the delivery is allowed, otherwise, feedback to the business system that the delivery is not allowed; the assets The delivery verification request includes the corresponding asset purchase request number;

(8) The business system receives the digital asset delivery request. After receiving the delivery permission feedback, the business system sends an asset delivery verification request to the cross-chain points clearing smart contract. If it receives the delivery permission feedback, it generates a digital asset delivery transaction and packs it into the The current block is stored, otherwise, no operation is performed; the digital asset delivery request includes the asset number and the asset purchase request number.

Compared with the prior art, the present invention has the beneficial effects of:

Realize the cross-chain transaction of digital assets through the cross-chain points clearing smart contract, complete the initiation and deposit of cross-chain transactions, and promote the cross-chain circulation of digital assets; use points as a value intermediary to realize the measurement of digital asset value, which is helpful to promote Digital asset transactions; through the periodic liquidation of points, the stability of the value of points can be achieved, which helps to stabilize the value of digital assets; through the improved initial point distribution and the agreed exchange price scheme, the point speculation can be effectively restrained and the cross-border value of digital assets can be maintained. Chain transactions are stable.

Description of drawings

Fig. 1 is a schematic flow diagram of a digital asset cross-chain transaction method according to an embodiment of the present invention.

Fig. 2 is a schematic flow chart of the method for voting to determine the initial points distribution according to the embodiment of the present invention.

Fig. 3 is a schematic flow chart of a method for agreeing on a token exchange price according to an embodiment of the present invention.

Fig. 4 is a schematic flow diagram of a user of business system A purchasing digital assets of business system B according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a digital asset cross-chain transaction system according to an embodiment of the present invention.

Among them: 10. Cross-chain point clearing smart contract, 20. Business system.

Detailed ways

The present invention will be further described in detail below in conjunction with the examples.

Those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be considered as limiting the scope of the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the literature in this field or according to the product specification. The materials or equipment used are not indicated by the manufacturer, and they are all conventional products that can be obtained through purchase.

For the cross-chain transaction method of digital assets based on the cross-trusted alliance chain, please refer to Figure 1, including the following steps:

Step A01) There is a cross-chain point clearing smart contract 10 issued on the trusted alliance chain, and the cross-chain point clearing smart contract 10 is connected to the business system 20 of the trusted alliance chain, and the cross-chain point clearing smart contract 10 performs the following steps:

Step A02) Receive the asset release information sent by the business system 20. The asset release information includes the identity of the issuer, the asset description information, and the selling price of the credits, and assigns an asset number to the asset. Synchronous asset release between several cross-chain credit clearing smart contracts 10 information;

Step A03) Receive the asset query request sent by the business system 20, and return the asset number of the corresponding asset;

Step A04) Receive the asset purchase request sent by the business system 20. The asset purchase request includes the asset number and the buyer's identity. The cross-chain points clearing smart contract 10 generates point transfer information and assigns a purchase request number to the asset purchase request. The point transfer information is Transfer the points corresponding to the point price from the account corresponding to the buyer's identity to the account corresponding to the publisher's identity, and several cross-chain point clearing smart contracts 10 synchronize point transfer information;

Step A05) After receiving the asset purchase request, the cross-chain points clearing smart contract 10 inquires that the point transfer information has been synchronized by several cross-chain point clearing smart contracts 10, and then marks the asset purchase request as a successful purchase;

Step A06) Receive the asset delivery verification request sent by the business system 20. The asset delivery verification request includes the corresponding asset purchase request number. If the status of the asset purchase request corresponding to the asset purchase request number is purchase success, feedback to the business system 20 to allow the delivery, Otherwise, feed back to the business system 20 that delivery is not allowed;

Step A07) The business system 20 receives the digital asset delivery request. The digital asset delivery request includes the asset number and the asset purchase request number. After the business system 20 receives the delivery permission feedback, it sends the asset delivery verification request to the cross-chain points clearing smart contract 10. If After receiving the feedback that the delivery is allowed, a digital asset delivery transaction will be generated and packaged into the current block storage, otherwise, no operation will be performed.

The cross-chain point clearing smart contract 10 has a point account, a point table and a token account. The point account records the points owned by the point account, and the point table records the points owned by blockchain users. The cross-chain point clearing smart contract 10 is preset with a settlement account period, before the settlement account period, when the token account of the cross-chain point clearing smart contract 10 receives the token transferred in by the blockchain user, the corresponding amount of points will be transferred from the contract point account to the blockchain user and recorded in In the point table, during the settlement account period, the cross-chain points clearing smart contract 10 converts the points of the blockchain users into a corresponding number of tokens, and transfers them to the accounts of the blockchain users.

Several cross-chain points clearing smart contracts 10 vote to determine the next settlement account period and the initial points distribution after the settlement account period ends. Redeem credits so that the credits held by the cross-chain credits clearing smart contract 10 match the initial distribution of credits after conversion.

During the settlement account period, several cross-chain points clearing smart contracts 10 pay taxes and fees by multiplying the points assigned by the initial points by the preset ratio.

During the settlement account period, several cross-chain points clearing smart contracts 10 each package and store all asset purchase requests in the corresponding blockchain, and then several cross-chain points clearing smart contracts 10 clear the points.

Please refer to attached picture 2, the method of voting to determine the initial point distribution includes:

Step B01) After the settlement account period ends, several cross-chain point clearing smart contracts 10 convert the points of the corresponding blockchain users into a corresponding number of tokens, and transfer the points to the points account;

Step B02) A number of cross-chain point clearing smart contracts 10 count the amount of point usage, and the cross-chain point clearing smart contract 10 with the largest amount of point usage acts as a voting initiator, who generates an initial point distribution plan and initiates a vote;

Step B03) If the cross-chain point clearing smart contract 10 exceeding the preset ratio agrees to the initial point distribution plan, the initial point distribution plan is passed, and the initial point distribution is carried out according to the initial point distribution plan.

The total amount of points used for distribution is fixed, and the method for the voting initiator to generate the initial point distribution plan includes:

The total amount of points is divided into three parts in proportion, the first part is directly allocated to the voting initiator, the second part is generated by the voting initiator, and the third part is recorded as N, and the voting initiator receives other cross-chain points for liquidation Calculate the application amount reported by smart contract 10, calculate the total amount of application amount, and calculate the proportion of the application amount reported by each cross-chain point clearing smart contract 10 in the total amount of application amount. The proportion is used as the distribution ratio of the corresponding cross-chain point clearing smart contract. The product of part of the credit amount N and the distribution ratio is used as the credit distribution amount allocated to the corresponding cross-chain credit clearing smart contract 10, and the distribution summary of the three parts is used as the initial credit distribution plan.

For example, in one allocation, the total amount of points used for distribution is 10,000, and the total amount of 10,000 points is divided into three parts in proportion. 1000 points for the first part, 5000 points for the second part and 4000 points for the third part.

The first part of 1000 points is directly distributed to the voting initiators. At this time, the voting initiator directly got 1000 points.

The second part of 5,000 points will be allocated by the voting initiator. Assume that there are 10 participants in the cross-chain transaction of digital assets, that is, including the voting initiator, there are ten cross-chain point clearing smart contracts. The voting initiators evenly distribute the 5,000 points, that is, each cross-chain point clearing smart contract is divided into 500 points. At this time, the initiator of the voting has obtained a total of 1,500 points, and other participants have obtained 500 points.

The integral amount of the third part is recorded as N, N=5000. Each cross-chain point clearing smart contract has uploaded its own application volume. Assume that the number of applications reported by the first four cross-chain point clearing smart contracts is 500, and the number of applications reported by the last six cross-chain point clearing smart contracts is 1,000. The total number of applications is 8000. The distribution ratio of the first four cross-chain point clearing smart contracts is 500/8000=1/16. At this time, N*1/16=5000*1/16=312.5 points, that is, the first four cross-chain point clearing smart contracts can allocate 312.5 points. The distribution ratio of the last six cross-chain point clearing smart contracts is 1000/8000=1/8. At this time, N*1/8=5000*1/8=625 points, that is, the first six cross-chain point clearing smart contracts can allocate 625 points.

Please refer to Attached Figure 3, the methods for agreeing on the exchange price of tokens include:

Step C01) A number of cross-chain point clearing smart contracts 10 each generate a token exchange price, randomly generate an obfuscation code, extract the obfuscation code and the hash value of the exchange price and send it to the voter;

Step C02) After receiving the hash value sent by all the cross-chain point settlement smart contracts 10, the voting initiator notifies all the cross-chain point liquidation smart contracts 10 to disclose the token exchange price and the obfuscation code;

Step C03) A number of cross-chain points liquidation smart contracts 10 calculate the product of their initial points and bids, freeze the corresponding number of tokens, and unfreeze the tokens during the settlement period;

Step C04) The voting initiator extracts the token exchange price and the hash value of the obfuscation code published by the cross-chain points clearing smart contract 10, and compares and verifies it with the received hash value;

Step C05) If the verification is inconsistent, it will be determined that the agreed token exchange price is illegal, and the agreed notification exchange price method will be re-executed; otherwise, the weighted average of all token exchange prices will be calculated with the initial points as the weight as the agreed token exchange price. certificate exchange price.

The voting initiator calculates the allowable bid range, which is k1 to k2 times the exchange price of the token in the previous settlement account period, k1 and k2 are preset coefficients, and satisfy k1<1<k2, which is lower than the previous settlement account A bid that is k1 times the exchange price of the current pass is regarded as k1 times the exchange price of the pass in the previous settlement account period, and a bid that is higher than k2 times the exchange price of the pass pass in the previous settlement account period is regarded as a pass in the previous settlement account period K2 times the exchange price. k1 defines the lower limit of the bid, the recommended value range of k1 is [0.5,0.8], and the recommended value is 0.5, 0.6 or 0.8. k2 defines the upper limit of the bid, the recommended value range of k2 is [1.2,1.6], and the recommended value is 1.2, 1.4 or 1.5.

Here, it is assumed that business system A purchases digital assets from business system B through points, and the process is shown in Figure 4.

1. To publish assets, business system B sends the digital asset profile information and the points required to purchase the digital assets to the cross-chain points clearing smart contract 10 of business system B.

2. After receiving the request, the cross-chain point clearing smart contract 10 of business system B will synchronize the digital asset information to the cross-chain point clearing smart contract 10 of all participating institutions.

3. The smart contract 10 of business system A and organization C's cross-chain points clearing smart contract records the digital assets of business system B.

4. Users of business system A query the required digital assets through the cross-chain points clearing smart contract 10 of business system A.

5. The user of business system A submits the digital asset request of business system B to the cross-chain points clearing smart contract 10A.

6. Through the cross-chain points clearing smart contract 10, the points of business system A will be deducted and the points of business system B will be increased.

7. The cross-chain points clearing smart contract 10 of business system A broadcasts the point reduction of business system A and the increase of points of business system B to the cross-chain point clearing smart contract 10 of all participating institutions.

8. All participating institutions record the transaction details.

9. After each cross-chain point clearing smart contract 10 synchronizes the point transaction details, the cross-chain point clearing smart contract 10 will report A to the business system A as a successful purchase.

10. The user of business system A sends a digital asset delivery request to business system B.

11. The business system B verifies the points transaction to the cross-chain points clearing smart contract 10B.

12. After the verification is passed, business system B will deliver the digital assets to business system A through cross-chain technology.

A digital asset cross-chain transaction system based on a cross-trusted alliance chain is used to implement the aforementioned cross-trusted alliance chain-based digital asset cross-chain transaction method, please refer to Figure 5, including several cross-chain gateways and several cross-chain Chain point clearing smart contract 10 and cross-chain point clearing smart contract 10 are published on the business blockchain. Several cross-chain point clearing smart contracts 10 are connected through cross-chain gateways. Cross-chain point clearing smart contract 10 performs the following steps:

Receive the asset release information sent by the business system 20, the asset release information includes the identity of the issuer, the asset description information and the credit selling price, assign the asset number to the asset, and synchronize the asset release information between several cross-chain credit clearing smart contracts 10;

Receive the asset query request sent by the business system 20, and return the asset number of the corresponding asset;

Receive the asset purchase request sent by the business system 20. The asset purchase request includes the asset number and the buyer's identity. The cross-chain points clearing smart contract 10 generates point transfer information and assigns a purchase request number to the asset purchase request. The point transfer information is the point sale Points corresponding to the price are transferred from the account corresponding to the buyer's identity to the account corresponding to the publisher's identity, and several cross-chain point clearing smart contracts 10 synchronize point transfer information;

The cross-chain point clearing smart contract 10 that receives the asset purchase request inquires that the point transfer information has been synchronized by several cross-chain point clearing smart contracts 10, and marks the asset purchase request as a successful purchase;

Receive the asset delivery verification request sent by the business system 20. The asset delivery verification request includes the corresponding asset purchase request number. If the status of the asset purchase request corresponding to the asset purchase request number is purchase success, feedback to the business system 20 to allow the delivery, otherwise, then Feedback to the business system 20 that delivery is not allowed;

The business system 20 receives the digital asset delivery request. The digital asset delivery request includes the asset number and the asset purchase request number. After the business system 20 receives the delivery permission feedback, it sends the asset delivery verification request to the cross-chain points clearing smart contract 10. If the permission is received If the delivery feedback is received, a digital asset delivery transaction will be generated and packaged into the current block for storage, otherwise, no operation will be performed.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention will also have other functions without departing from the spirit and scope of the present invention. Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. The digital asset cross-chain transaction method based on the cross-trusted alliance chain is characterized in that a cross-chain integral clearing intelligent contract is issued on the trusted alliance chain, the cross-chain integral clearing intelligent contract is connected with a business system of the trusted alliance chain, and the cross-chain integral clearing intelligent contract executes the following steps:

(1) Receiving asset release information sent by a business system, and distributing asset numbers for assets; the asset release information comprises a publisher identity, asset description information and an integral selling price;

(2) Synchronizing asset release information among a plurality of cross-chain integrated clearing intelligent contracts;

(3) Receiving an asset inquiry request sent by a business system, and returning an asset number of a corresponding asset;

(4) Receiving an asset purchase request sent by a business system, generating point transfer information by a cross-chain point clearing intelligent contract and giving a purchase request number to the asset purchase request; the asset purchase request comprises an asset number and a purchaser identity; the point transfer information is to transfer the point corresponding to the point selling price from the account corresponding to the buyer identity to the account corresponding to the publisher identity;

(5) The intelligent contract synchronous integral transfer information of the cross-chain integral clearing is calculated by a plurality of pieces;

(6) After receiving the cross-chain integral clearing intelligent contract inquiry of the asset purchase request and the integral transfer information is synchronized in a plurality of cross-chain integral clearing intelligent contracts, marking the asset purchase request as successful purchase;

(7) Receiving an asset delivery verification request sent by a service system, and if the asset purchase request state corresponding to the asset purchase request number is successful in purchase, feeding back permission to deliver to the service system, otherwise, feeding back non-permission to deliver to the service system; the asset delivery verification request includes a corresponding asset purchase request number;

(8) The business system receives the digital asset delivery request, and after receiving the delivery permission feedback, the business system sends an asset delivery verification request to the cross-chain integral clearing intelligent contract, if the delivery permission feedback is received, digital asset delivery transaction is generated and packed into the current block for storage, otherwise, no operation is performed; the digital asset delivery request includes an asset number and an asset purchase request number.

2. The digital asset cross-chain transaction method based on cross-trusted coalition chains of claim 1, wherein: the cross-chain integral clearing intelligent contract is provided with an integral account, an integral table and a verification account;

the point account records the points owned by the point account;

the integral table records the integral owned by the blockchain user;

and before the settlement period, transferring corresponding quantity of points to the blockchain user by the contract point account when the general certificate account of the cross-chain integrated clearing intelligent contract receives the general certificate transferred by the blockchain user, and recording the corresponding quantity of points in an integral table, wherein in the settlement period, the cross-chain integrated clearing intelligent contract exchanges the points of the blockchain user into corresponding quantity of general certificates and transfers the corresponding quantity of general certificates into the account of the blockchain user.

3. The digital asset cross-chain transaction method based on cross-trusted coalition chains of claim 2, wherein:

and after the settlement period is finished, voting to determine the next settlement period and initial point distribution, and in the settlement period, exchanging the points by the agreed universal exchange price by the plurality of the intelligent contracts, so that the points held by the intelligent contracts after the exchange are consistent with the initial point distribution.

4. A digital asset cross-chain transaction method based on cross-trusted coalition chains as claimed in claim 3, characterized by:

and in the settlement period, the plurality of cross-chain integral clearing intelligent contracts pay tax fees according to the preset ratio of integral multiplication allocated by initial integral, and after the tax fees are paid completely, the tax fees are distributed among the plurality of cross-chain integral clearing intelligent contracts in an average way.

5. A digital asset cross-chain transaction method based on cross-trusted coalition chains as claimed in any one of claims 1 to 4, characterised by:

and during the settlement period, the cross-chain integral clearance intelligent contracts package and store all asset purchase requests in corresponding blockchains, and then clear the integral.

6. The digital asset cross-chain transaction method based on cross-trusted coalition chains of claim 3 or 4, characterized by:

the method for determining initial point allocation by voting comprises the following steps:

after the settlement account period is finished, the cross-chain point clearing intelligent contracts exchange the points of the corresponding blockchain users into corresponding number of pass certificates, and the points are transferred into the point accounts;

counting the integral use quantity by the plurality of intelligent contracts for cross-chain integral clearing, wherein the intelligent contract for cross-chain integral clearing with the largest integral use quantity is used as a voting initiator, and the voting initiator generates an initial integral allocation scheme and sends out votes;

and if the intelligent contract for the cross-chain integral clearance exceeding the preset proportion agrees with the initial integral allocation scheme, the initial integral allocation scheme passes, and initial integral allocation is carried out according to the initial integral allocation scheme.

7. The digital asset cross-chain transaction method based on cross-trusted coalition chain of claim 6, wherein:

the method for the voting sponsor to generate the initial point allocation scheme comprises the following steps:

dividing the total amount of the integral into three parts according to a proportion, wherein the first part is directly distributed to a voting initiator, the second part generates an allocation scheme by the voting initiator, the integral amount of the third part is recorded as N, the voting initiator receives the application amount reported by other intelligent contracts for clearing the integral across the chain, calculates the sum of the application amounts, calculates the proportion of the application amount to the sum of the application amounts reported by each intelligent contract for clearing the integral across the chain, the proportion is used as the allocation proportion of the corresponding intelligent contract for clearing the integral across the chain, the product of the integral amount N of the third part and the allocation proportion is used as the integral allocation amount distributed to the corresponding intelligent contract for clearing the integral across the chain, and the allocation sum of the three parts is used as the initial integral allocation scheme.

8. The digital asset cross-chain transaction method based on cross-trusted coalition chain of claim 6, wherein:

the method for agreeing to pass the evidence to exchange the price comprises the following steps:

each of the plurality of cross-chain integral clearing intelligent contracts generates a pass exchange price, generates a confusion code randomly, extracts hash values of the confusion code and the exchange price and sends the hash values to a voting initiator;

after receiving the hash values sent by all the cross-chain integral clearing intelligent contracts, the voting sponsor informs all the cross-chain integral clearing intelligent contracts of public license exchange price and confusion codes;

calculating the products of initial points and bids of the intelligent contracts through a plurality of cross-chain integral clearing contracts, freezing the corresponding number of pass certificates, and thawing the pass certificates in a settlement period;

the voting sponsor extracts the hash value of the through certificate exchange price and the confusion code disclosed by the cross-chain integral clearing intelligent contract, and compares the hash value with the received hash value for verification;

if the verification is inconsistent, judging that the current agreed pass exchange price is illegal, and re-executing the agreed notification exchange price method, otherwise, calculating the weighted average of all pass exchange prices by taking initial points as weights, and taking the weighted average as the agreed pass exchange price.

9. The digital asset cross-chain transaction method based on cross-trusted coalition chains of claim 8, wherein: the voting initiator calculates the allowed bid interval;

the allowable bidding interval is k1 times to k2 times of the last accounting period through-certificate exchange price, k1 and k2 are preset coefficients, and the bid which is lower than k1 times of the last accounting period through-certificate exchange price is regarded as k1 times of the last accounting period through-certificate exchange price, and the bid which is higher than k2 times of the last accounting period through-certificate exchange price is regarded as k2 times of the last accounting period through-certificate exchange price.

10. A digital asset cross-chain transaction system based on a cross-trusted coalition chain for performing the digital asset cross-chain transaction method based on a cross-trusted coalition chain as claimed in any one of claims 1 to 4, 7 to 9, characterized by:

the system comprises a plurality of cross-chain gateways and a plurality of cross-chain integrated clearing intelligent contracts; the inter-chain integral clearing intelligent contracts are distributed on a business block chain, a plurality of the inter-chain integral clearing intelligent contracts are connected through the inter-chain gateway, and the inter-chain integral clearing intelligent contracts execute the following steps:

(1) Receiving asset release information sent by a business system, and distributing asset numbers for assets; the asset release information comprises a publisher identity, asset description information and an integral selling price;

(2) Synchronizing asset release information among a plurality of cross-chain integrated clearing intelligent contracts;

(3) Receiving an asset inquiry request sent by a business system, and returning an asset number of a corresponding asset;

(4) Receiving an asset purchase request sent by a business system, generating point transfer information by a cross-chain point clearing intelligent contract and giving a purchase request number to the asset purchase request; the asset purchase request comprises an asset number and a purchaser identity; the point transfer information is to transfer the point corresponding to the point selling price from the account corresponding to the buyer identity to the account corresponding to the publisher identity;

(5) The intelligent contract synchronous integral transfer information of the cross-chain integral clearing is calculated by a plurality of pieces;

(6) After receiving the cross-chain integral clearing intelligent contract inquiry of the asset purchase request and the integral transfer information is synchronized in a plurality of cross-chain integral clearing intelligent contracts, marking the asset purchase request as successful purchase;

(7) Receiving an asset delivery verification request sent by a service system, and if the asset purchase request state corresponding to the asset purchase request number is successful in purchase, feeding back permission to deliver to the service system, otherwise, feeding back non-permission to deliver to the service system; the asset delivery verification request includes a corresponding asset purchase request number;

(8) The business system receives the digital asset delivery request, and after receiving the delivery permission feedback, the business system sends an asset delivery verification request to the cross-chain integral clearing intelligent contract, if the delivery permission feedback is received, digital asset delivery transaction is generated and packed into the current block for storage, otherwise, no operation is performed; the digital asset delivery request includes an asset number and an asset purchase request number.

Images