CN112085551A

CN112085551A - Transaction method based on block chain and related equipment

Info

Publication number: CN112085551A
Application number: CN201910520751.9A
Authority: CN
Inventors: 崔磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-12-15

Abstract

The embodiment of the application discloses a transaction method based on a block chain and related equipment, wherein the transaction method based on the block chain comprises the following steps: the block chain trading platform receives a target trading request sent by a first block chain node, wherein the target trading request comprises identity information of the first block chain node and identity information of a second block chain node; the blockchain transaction platform verifies whether the identity information of the first blockchain node and the identity information of the second blockchain node are legal or not; and if the transaction authority is legal, the block chain transaction platform grants the transaction authority between the first block chain node and the second block chain node, wherein the transaction authority comprises the access authority of the first block chain node to the identity information of the second block chain node and the access authority of the second block chain node to the identity information of the first block chain node. The embodiment of the application can provide a convenient, efficient, transparent and safe transaction method for the buyer and the seller.

Description

Transaction method based on block chain and related equipment

Technical Field

The present application relates to the field of blockchain technologies, and in particular, to a blockchain-based transaction method and related devices.

Background

In modern life, item transaction has become an indispensable part of people's life, and most of the existing transaction systems are intermediary platforms which associate buyers and sellers who trade items and related institutions and organizations involved in the transaction process, and frequent interactions among different organizations are often involved on the intermediary platforms in the transaction process, for example: in the process of releasing the information of the commodities to be sold and searching the intention of the buyer, the interaction between the buyer and the seller and the intermediary platform is involved. In the transaction process, the intermediary platform is used as a transaction platform trusted by both the buyer and the seller, so that the seller can release the information of the articles to be sold on the intermediary platform, and the buyer is provided with the intention article to search and purchase, thereby the transaction intention achieved by both the buyer and the seller is realized, and the transaction is completed.

However, in the prior art, the intervention of the intermediary platform complicates the whole transaction process, and each transaction-related institution involved in one transaction only holds partial data of the whole transaction, so that the transaction data held by the transaction participants of each transaction is missing and incomplete, but if all transaction information is disclosed to all transaction participants of each transaction at the same time, it is likely to cause leakage of user privacy information, so how to provide a convenient, efficient, transparent and safe transaction method is a problem to be urgently solved.

Disclosure of Invention

In view of the above, the present application is proposed to provide a blockchain-based transaction method and related apparatus that overcome or at least partially solve the above-mentioned problems.

In a first aspect, an embodiment of the present application provides a method for block chain based transaction, where the method includes:

the block chain trading platform receives a target trading request sent by a first block chain node, wherein the target trading request comprises identity information of the first block chain node and identity information of a second block chain node; the blockchain transaction platform verifies whether the identity information of the first blockchain node and the identity information of the second blockchain node are legal or not; and if the transaction authority is legal, the block chain transaction platform grants the transaction authority between the first block chain node and the second block chain node, wherein the transaction authority comprises the access authority of the first block chain node to the identity information of the second block chain node and the access authority of the second block chain node to the identity information of the first block chain node.

According to the method and the device, the block chain trading platform receives the target trading request sent by the first block chain node, and after the identity information of the first block chain node and the identity information of the second block chain node contained in the target trading request are verified to be legal, the trading authority is granted to the first block chain node and the second block chain node, so that the first block chain node has the access authority to the identity information of the second block chain node, and the second block chain node has the access authority to the identity information of the first block chain node. Therefore, the block chain-based transaction method can grant the transaction authority of the buyer and the seller after verifying that the identity information of the buyer and the seller is legal, not only can utilize the characteristic that the block chain removes the distributed account book to disclose the whole transaction flow and the transaction information to the transaction participants of the transaction, but also can keep the transaction address or the identity information and the like which are sensitive to the transaction participants secret, so that only the block chain link points with the authority can perform the transaction and mutually access the identity information and the like. Therefore, a convenient, efficient, transparent and safe transaction method can be provided for the users of the buyer and the seller.

In one possible implementation, the method further includes: and if the target transaction request is legal, the blockchain transaction platform broadcasts the target transaction request to each blockchain node in the blockchain transaction platform. According to the embodiment of the application, after the blockchain trading platform verifies that the identity information of the first blockchain node and the identity information of the second blockchain node are legal, the target trading request is broadcast to each blockchain node in the blockchain trading platform, the first blockchain node and the second blockchain node of each blockchain node in the blockchain trading platform can be informed that the trading interest of the target commodity is achieved about the target commodity, the blockchain trading platform does not receive trading requests sent by other blockchain nodes aiming at the target commodity any more, the trading state of the target commodity is locked, and the trading rights and interests of both the first blockchain node and the second blockchain node are protected.

In one possible implementation manner, the target transaction request further includes commodity information of the target commodity; before the blockchain trading platform receives the target trading request sent by the first blockchain node, the method further includes: the blockchain trading platform receives selling information of the target commodity sent by the first blockchain node, wherein the selling information comprises privacy information and commodity information, and the privacy information comprises one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity; the blockchain trading platform broadcasts the sale information to each node of the blockchain trading platform. According to the embodiment of the application, before receiving a target transaction request sent by a first blockchain node, a blockchain transaction platform needs the first blockchain node (namely, a seller user) to upload sale information of a target commodity, wherein the sale information includes privacy information and commodity information, and the privacy information and the commodity information enable users of other blockchain nodes to conveniently and efficiently retrieve the intended commodity.

In one possible implementation, the broadcasting, by the blockchain trading platform, the sale information to each node of the blockchain trading platform includes: the block chain trading platform verifies whether the commodity information is real or not, and determines whether the first block chain link point holds the ownership and/or tradeable right of the target commodity or not according to the privacy information; if the commodity information is real and the first block chain node holds the ownership and/or the tradable right of the target commodity, the block chain trading platform broadcasts the selling information to each block chain node of the block chain trading platform. In the embodiment of the present application, before the blockchain trading platform discloses the selling information of the target commodity, it is further required to determine whether the first blockchain link point has ownership and/or tradable right of the sent target commodity, so as to ensure that the target commodity can be legally traded, for example: if the first block chain link point does not have ownership and/or trade right of the target commodity, the block chain trading platform cannot broadcast the selling information, so that the selling information of illegal commodities is prevented from being retrieved by an unknown buyer user or even purchasing illegal commodities after appearing on the block chain trading platform, the legal interest of the buyer is guaranteed, the risk that illegal persons use the trading platform to conduct illegal activities is greatly reduced (for example, stolen commodities cannot be traded), and the trading process is safer.

In one possible implementation, the method further includes: the block chain transaction platform receives transaction requests sent by one or more block chain nodes, wherein the one or more block chain nodes comprise the second block chain node, the transaction request sent by any one block chain node comprises identity information and a product identifier of the corresponding block chain node, and the product identifier is used for uniquely identifying the target commodity; and the blockchain trading platform forwards the trading request sent by the one or more blockchain nodes to the first blockchain link point. In this embodiment of the present application, the target transaction request is one of the transaction requests determined by the first blockchain node from the one or more transaction requests, and is a target transaction request, for example: the first blockchain link point can determine that one transaction request with the earliest time, the highest credit of a buyer user or the highest bid price in the transaction requests is a target transaction request, so that the blockchain transaction platform discloses the transaction requests initiated to the target commodity by other blockchain nodes to the first blockchain link point, the first blockchain link point can be guaranteed to know all information about the market conditions of the target commodity, the legal rights and interests of a seller are guaranteed, and the transaction process is also transparent.

In a second aspect, an embodiment of the present application provides a method for block chain based transaction, where the method includes: a first blockchain node sends a target transaction request to a blockchain transaction platform, wherein the target transaction request comprises identity information of the first blockchain node and identity information of a second blockchain node; the first block link point receives a trading right between the second block link point and the first block link point, wherein the trading right comprises an access right of the first block link point to the identity information of the second block link node and an access right of the second block link point to the identity information of the first block link node; and the first block chain node completes the transaction corresponding to the target transaction request according to the transaction authority and the second block chain node.

In the embodiment of the application, a target transaction request is sent to a blockchain transaction platform through a first blockchain node, so that the blockchain transaction platform verifies the identity information of the first blockchain node and the identity information of a second blockchain node contained in the target transaction request; then, if the block chain trading platform verifies that the identity information of the first block chain node and the identity information of the second block chain node are both legal, the first block chain link point can receive a trading right between the first block chain link point and the second block chain link point, wherein the trading right comprises an access right of the first block chain link point to the identity information of the second block chain node and an access right of the second block chain link point to the identity information of the first block chain node; finally, the first block link point and the second block link point can complete the transaction corresponding to the target transaction request according to the transaction authority. Therefore, the first block chain node can receive the transaction authority granted after the block chain transaction platform verifies that the identity information of the buyer and the seller is legal, the method can disclose the whole transaction process and the transaction information to the transaction participants, and meanwhile, the first block chain node and the second block chain node, namely the buyer and the seller, keep secret for the sensitive privacy information (such as transaction addresses or identity information) so that only the participants with the authority can view the privacy information, therefore, the privacy safety in the transaction process is protected while the transaction information is disclosed, and a convenient, efficient and transparent safe transaction method can be provided for the users of the buyer and the seller.

In one possible implementation, the method further includes: the first block chain node receives a transaction request sent by one or more block chain nodes forwarded by the block chain transaction platform, wherein the one or more block chain nodes comprise the second block chain node, the transaction request sent by any one block chain node comprises identity information and a product identifier of the corresponding block chain node, and the product identifier is used for uniquely identifying a target commodity; the first blockchain node determines the target transaction request from the transaction requests sent by the one or more blockchain nodes. In the embodiment of the application, the first blockchain node determines one of the one or more transaction requests sent by the one or more blockchain nodes as the target transaction request, so that the first blockchain node can know all information about the market conditions of the target commodity, the legal rights and interests of sellers are guaranteed, and the transaction process is also transparent.

In a possible implementation manner, before the first blockchain node receives a transaction request sent by one or more blockchain nodes forwarded by the blockchain transaction platform, the method further includes: the first blockchain node sends selling information of the target commodity to the blockchain trading platform, wherein the selling information comprises privacy information of the first blockchain node and commodity information of the target commodity, and the privacy information comprises one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity. According to the embodiment of the application, before a first blockchain node (namely a seller user) receives a transaction request, the first blockchain node is required to upload the sale information of a target commodity, wherein the sale information comprises privacy information and commodity information, the privacy information enables a blockchain transaction platform to determine ownership and/or trade right of the target commodity, and the commodity information enables users of other blockchain nodes to conveniently and efficiently retrieve the intended commodity.

In a third aspect, an embodiment of the present application provides a blockchain-based transaction method, where the method includes: a second block chain node receives the target transaction request broadcast by a block chain transaction platform, wherein the target transaction request comprises identity information of a first block chain node and identity information of a second block chain node; the second block link point receives a trading right granted by the block chain trading platform to the first block link point, wherein the trading right comprises an access right of the first block link point to the identity information of the second block chain node and an access right of the second block link point to the identity information of the first block chain node; and the second block chain node completes the transaction corresponding to the target transaction request according to the transaction authority and the first block chain node.

The target transaction request broadcasted by the block chain transaction platform can be received by the second block chain link node, the target transaction request comprises the identity information of the first block chain node and the identity information of the second block chain node, at this time, the second block chain link node cannot access the identity information of the first block chain node, only after the block chain transaction platform verifies that the identity information of the first block chain node and the identity information of the second block chain node are both legal, and after the transaction permission granted by the block chain transaction platform is received, the second block chain node can have the access permission to the identity information of the first block chain node, and the transaction permission comprises the access permission of the first block chain link node to the identity information of the second block chain node and the access permission of the second block chain link node to the identity information of the first block chain node. Therefore, in the process of the participation of the buyer and the seller in the transaction, the privacy information (such as transaction address or identity information) which is relatively sensitive to the buyer and the seller is kept secret, so that only the participant with the authority can check the privacy information, and a safer transaction method can be provided for the buyer and the seller.

In one possible implementation, the method further includes: the second block link point receives selling information broadcast by the block chain trading platform, wherein the selling information comprises privacy information and commodity information of a target commodity, and the privacy information comprises one or more of identity information of the first block chain node, proof information of ownership of the target commodity held by the first block link point, and proof information of tradable right of the target commodity held by the first block link point. By implementing the embodiment of the application, the second block chain link point can receive the selling information broadcast by the block chain trading platform, wherein the selling information comprises privacy information and commodity information, and the commodity information can enable the second block chain link point to search the intended commodity more conveniently and efficiently.

In one possible implementation, the target transaction request further includes commodity information of the target commodity; the method further comprises the following steps: and the second blockchain node sends a transaction request of the target commodity to the blockchain transaction platform, wherein the transaction request comprises the identity information of the second blockchain node and a product identifier, and the product identifier is used for uniquely identifying the target commodity. According to the embodiment of the application, the transaction request of the target commodity can be sent to the blockchain transaction platform through the second blockchain node, the first blockchain node can determine one transaction request sent by the second blockchain node as the target transaction request from one or more transaction requests sent by one or more blockchain nodes, the target transaction request comprises the identity information of the second blockchain node, the transaction participant of the target commodity can be the first blockchain node and the second blockchain node, and the legitimate transaction rights and interests of the second blockchain node are further guaranteed.

In a fourth aspect, an embodiment of the present application provides a blockchain trading platform, where the trading platform includes: :

a first receiving unit, configured to receive a target transaction request sent by a first blockchain node, where the target transaction request includes identity information of the first blockchain node and identity information of a second blockchain node;

the verification unit is used for verifying whether the identity information of the first blockchain node and the identity information of the second blockchain node are legal or not;

and if the transaction authority is legal, granting the transaction authority between the first block link node and the second block link node, wherein the transaction authority includes an access authority of the first block link node to the identity information of the second block link node and an access authority of the second block link node to the identity information of the first block link node.

According to the embodiment of the application, a target transaction request sent by a first block chain node is received through a block chain transaction platform, after the identity information of the first block chain node and the identity information of a second block chain node contained in the target transaction request are verified to be legal, transaction permission is granted to the first block chain node and the second block chain node, so that the first block chain node has access permission to the identity information of the second block chain node, and the second block chain node has access permission to the identity information of the first block chain node. Therefore, the block chain-based transaction method can grant the transaction authority of the buyer and the seller after verifying that the identity information of the buyer and the seller is legal, not only can utilize the characteristic that the block chain removes the distributed account book to disclose the whole transaction flow and the transaction information to the transaction participants of the transaction, but also can keep the transaction address or the identity information and the like which are sensitive to the transaction participants secret, so that only the block chain link points with the authority can perform the transaction and mutually access the identity information and the like. Therefore, a convenient, efficient, transparent and safe transaction method can be provided for the users of the buyer and the seller.

In one possible implementation, the trading platform further includes: the first broadcasting unit is used for broadcasting the target transaction request to each blockchain node in the blockchain transaction platform by the blockchain transaction platform if the target transaction request is legal.

In one possible implementation, the target transaction request further includes commodity information of the target commodity; the trading platform further comprises: a second receiving unit, configured to receive, before a target transaction request sent by the first blockchain node is received, sales information of the target product sent by the first blockchain node, where the sales information includes privacy information and the product information, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target product, and proof information that the first blockchain node holds tradable right of the target product; and the second broadcasting unit is used for broadcasting the selling information to each node of the blockchain trading platform.

In a possible implementation manner, the second broadcasting unit is specifically configured to verify whether the commodity information is authentic, and determine whether the first block link point holds ownership and/or tradable right of the target commodity according to the privacy information; if the commodity information is real and the first block chain node holds the ownership and/or the tradable right of the target commodity, the selling information is broadcasted to each block chain node of the block chain trading platform.

In one possible implementation, the trading platform further includes: a third receiving unit, configured to receive one or more transaction requests sent by one or more blockchain nodes, where the one or more blockchain nodes include the second blockchain node, the transaction request includes the identity information and a product identifier corresponding to the blockchain node, and the product identifier is used to uniquely identify the target commodity; a forwarding unit to forward the one or more transaction requests to the first tile link point.

In a fifth aspect, an embodiment of the present application provides a block link point, where the block link node is a first block link node, and the first block link point includes:

the system comprises a first sending unit, a second sending unit and a third sending unit, wherein the first sending unit is used for sending a target transaction request to a blockchain transaction platform, and the target transaction request comprises identity information of a first blockchain node and identity information of a second blockchain node;

a fourth receiving unit, configured to receive a transaction right granted by the blockchain transaction platform to the second blockchain link point, where the transaction right includes an access right of the first blockchain link point to the identity information of the second blockchain node and an access right of the second blockchain link point to the identity information of the first blockchain node;

and the first transaction unit is used for finishing the transaction corresponding to the target transaction request according to the transaction authority and the second block chain node.

In one possible implementation manner, the first blockchain node further includes: a fifth receiving unit, configured to receive a transaction request sent by one or more blockchain nodes forwarded by the blockchain transaction platform, where the one or more blockchain nodes include the second blockchain node, where the transaction request sent by any one blockchain node includes identity information and a product identifier of the corresponding blockchain node, and the product identifier is used to uniquely identify a target commodity; a first determining unit, configured to determine the target transaction request from the transaction requests sent by the one or more blockchain nodes.

In one possible implementation manner, the first blockchain node further includes: a second sending unit, configured to send, by the first blockchain node, sale information of the target commodity to the blockchain trading platform before receiving a trading request sent by one or more blockchain nodes forwarded by the blockchain trading platform, where the sale information includes privacy information of the first blockchain node and commodity information of the target commodity, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity.

In a sixth aspect, an embodiment of the present application provides a block link point, where the block link node is a second block link node, and the second block link point includes:

a sixth receiving unit, configured to receive the target transaction request broadcast by the blockchain transaction platform, where the target transaction request includes identity information of the first blockchain node and identity information of the second blockchain node;

a seventh receiving unit, configured to receive a transaction right granted by the blockchain transaction platform with the first blockchain link point, where the transaction right includes an access right of the first blockchain link point to the identity information of the second blockchain node and an access right of the second blockchain link point to the identity information of the first blockchain node;

and the second transaction unit is used for finishing the transaction corresponding to the target transaction request according to the transaction authority and the first block chain link point.

In one possible implementation manner, the second blockchain node further includes: an eighth receiving unit, configured to receive selling information broadcast by the blockchain trading platform, where the selling information includes privacy information and commodity information of a target commodity, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity.

In one possible implementation, the target transaction request further includes commodity information of the target commodity; the second blockchain node further comprises: and a third sending unit, configured to send a transaction request of the target commodity to the blockchain transaction platform, where the transaction request includes identity information of a second blockchain node and a product identifier, and the product identifier is used to uniquely identify the target commodity.

In a seventh aspect, an embodiment of the present application provides a service device, where the service device includes a processor, and the processor is configured to support the service device to implement a function corresponding to a blockchain transaction platform in the blockchain-based transaction method provided in the first aspect. The service device may also include a memory, coupled to the processor, that stores program instructions and data necessary for the service device. The service device may also include a communication interface for the service device to communicate with other devices or a communication network.

In an eighth aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a processor, and the processor is configured to support the terminal device to implement a function corresponding to a blockchain node in the blockchain-based transaction method provided in the second aspect or the third aspect, where the blockchain node includes a first blockchain node and a second blockchain node. The terminal device may also include a memory, coupled to the processor, that stores program instructions and data necessary for the terminal device. The terminal device may also include a communication interface for the terminal device to communicate with other devices or a communication network.

In a ninth aspect, an embodiment of the present application provides a computer storage medium for storing computer software instructions for a blockchain trading platform provided in the first aspect, which includes a program for executing the first aspect.

In a tenth aspect, the present application provides a computer storage medium for storing computer software instructions for the first block link point provided in the second aspect, which includes a program designed to execute the second aspect.

In an eleventh aspect, an embodiment of the present application provides a computer storage medium for storing computer software instructions for the second block link point provided in the third aspect, which includes a program for executing the third aspect.

In a twelfth aspect, the present application provides a computer program, where the computer program includes instructions, and when the computer program is executed by a computer, the computer may execute the process executed by the blockchain trading platform in the first aspect.

In a thirteenth aspect, the present application provides a computer program, where the computer program includes instructions, and when the computer program is executed by a computer, the computer may execute the process performed by the first blockchain node in the second aspect.

In a fourteenth aspect, the present application provides a computer program, where the computer program includes instructions, and when the computer program is executed by a computer, the computer may execute the flow executed by the second blockchain node in the third aspect.

In a fifteenth aspect, the present application provides a chip system, where the chip system includes a processor, configured to support a service device to implement the functions recited in the first aspect, or support a terminal device to implement the functions recited in the second aspect, or support a terminal device to implement the functions recited in the third aspect, and in one possible design, the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for a data sending device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

Fig. 1 is a schematic diagram of a transaction system architecture in the prior art according to an embodiment of the present application.

Fig. 2 is a block chain-based transaction system architecture diagram according to an embodiment of the present disclosure.

Fig. 3 is a schematic flowchart of a transaction method based on a blockchain according to an embodiment of the present disclosure.

Fig. 4 is a flowchart of an application scenario of a transaction method based on a blockchain according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a transaction apparatus based on a blockchain according to an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of another transaction apparatus based on a blockchain according to an embodiment of the present disclosure.

Fig. 7 is a schematic structural diagram of another transaction apparatus based on a blockchain according to an embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of another transaction apparatus based on a blockchain according to an embodiment of the present disclosure.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

The terms "first," "second," "third," "fourth," "fifth," "sixth," "seventh," and "eighth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

It should be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

First, some terms in the present application are explained so as to be easily understood by those skilled in the art.

(1) The block chain is a chain data structure formed by combining data blocks in a sequential connection mode according to a time sequence, and is a distributed account book which is guaranteed in a cryptographic mode and cannot be tampered and forged. Generally, the blockchain system has a plurality of blockchain nodes, and since there is no centralized management mechanism in the blockchain, it is necessary to ensure that all blockchain nodes have a consistent consensus for each blockchain information, i.e. each blockchain node stores the same blockchain information.

(2) Smart contracts, which are a computer protocol intended to propagate, validate or execute contracts in an informational manner. An intelligent contract is a set of commitments (commitments) defined in digital form, comprising an agreement on which a contract participant can execute these commitments.

(3) Mortgage refers to the situation where a mortgage and a creditor make a written contract to secure a mortgage property without transferring possession of the mortgage property. When the debtor does not fulfill the debt, the creditor is entitled to be paid by priority with the price of the property discounted by law or with the price of the property changed for sale by auction.

(4) The intermediary service is a general term for providing consultation, price evaluation, brokerage and other behaviors for trading activities. The intermediary service organization refers to an organization which is between a production operator and a consumer and is specially qualified according to law to provide services for the production operator and the consumer. For example, a consumption broker creates revenue for a consumer, creates profits for a manufacturer, and acts as an intermediary service between the consumer and the manufacturer. The consumption brokerage limited is such an intermediary service.

Secondly, the technical problems to be solved by the present application are analyzed and presented. In the prior art, the technology related to the trading system includes the following scheme, and the scheme specifically may include the following steps 1 to 3. Referring to fig. 1, fig. 1 is a schematic diagram of a transaction system architecture in the prior art, which is suitable for the transaction steps of the scheme according to an embodiment of the present application.

Step 1, the transaction seller registers the information of the article to be sold and the user information of the seller on the intermediary platform.

Step 2, the transaction buyer searches the required goods information on the intermediary platform, and carries out screening according to the search result, and simultaneously needs to provide the user information of the buyer.

And 3, determining the transaction by the buyer and the seller of the article to achieve the primary transaction intention.

If during the transaction of some valuables, mortgage articles, etc., it may be necessary to go to the national register to verify the authority of the transaction article, go to the bank to verify the mortgage state of the article, manage the transaction fund, etc. Therefore, the scheme may further include the following steps 4 to 8.

And 4, sending a request to a national registration authority to verify the ownership and tradable right of the article.

And 5, sending a request to a bank to verify the mortgage information of the article.

And 6, after the verification of the step 6, the step 4 and the step 5 is passed, sending a request to a bank, and making payment to the seller by the buyer.

And 7, simultaneously sending a request to the national registration agency to change the ownership information of the article.

After step 8, step 6 and step 7 are completed, a certain service fee (generally shared by both buyer and seller) is paid to the intermediary organization, and the whole transaction is completed.

The scheme is suitable for the transaction process based on the intermediary organization or the platform, meets most transaction requirements in the current life, but has the following defects:

shortcoming 1, the creation of intermediary platforms makes the transaction more complex. As described above, the buyer and the seller publish/search the information of the article to be sold on the intermediary platform, and facilitate the smooth progress of the whole transaction based on the trust of the two transaction parties on the intermediary platform, and at the same time, pay a certain service fee to the intermediary platform. Because the information of the transaction buyer and the transaction seller is not equal and the buyer and the seller are not mutually trusted, the formation of a transaction intermediary platform is promoted. The generation of the intermediary platform makes the transaction more complicated, and further has adverse effect on the inequality of transaction information.

And 2, the transaction information between each transaction participant is unequal. As described above, a complete transaction involves multiple organizations or institutions, but each organization only stores partial transaction data related to itself, that is, each transaction-related institution only holds partial data of the whole transaction, so that the transaction data is incomplete and is not beneficial to maintaining the complete transaction data; meanwhile, the possibility of tampering the transaction data is increased, and the transaction data is unsafe.

And 3, if all transaction information is disclosed, privacy information of the user can be leaked. As described above, each transaction participant only holds partial data of the whole transaction process, and if all transaction information in the whole transaction process is disclosed to the transaction participants, privacy information of users may be revealed, and illegal activities (e.g., fraudulent users) may be performed because lawless persons steal all data of the whole transaction process, so that the possibility of stealing transaction data is increased, and the transaction data is unsafe.

In summary, in the conventional transaction method, the buyer and the seller disclose their identity information on the basis of trust of the intermediary platform, but since the intermediary platform cannot ensure the security of the information stored on the intermediary platform when providing the intermediary service, any user on the intermediary platform may be able to easily obtain the identity information of another user; furthermore, if the intermediary platform cannot confirm the validity of the identity information of both transaction parties, even lawless persons can carry out illegal transactions on the intermediary platform, which seriously harms the benefits and safety of users on the intermediary platform; moreover, the intermediary platform generally does not publish all data of the whole transaction process to the buyer and the seller, further increasing the possibility that the transaction data is tampered, and causing insecurity of the transaction data. Therefore, the blockchain-based transaction method provided by the application can be used for solving the problems of how to protect the privacy of the user, how to ensure the validity of the identities of the two transaction parties when the user carries out transaction, and how to make the user know all information in the transaction process.

Based on the above technical problems, and in order to facilitate understanding of the embodiments of the present application, a description will be given below of one architecture of a transaction system based on a blockchain, which is based on the embodiments of the present application. Referring to fig. 2, fig. 2 is a schematic diagram of a transaction system architecture based on a blockchain according to an embodiment of the present application, including: the blockchain trading platform 201, the first blockchain node 202 and the second blockchain node 203 may further include a third blockchain node 204. Wherein

The blockchain transaction platform 201 may be a node device in a blockchain system, where the blockchain system includes a plurality of node devices that are not trusted with each other, all the node devices commonly maintain data records in the blockchain, and each node device locally stores a complete piece of blockchain data. The blockchain transaction platform is a transaction security guarantee platform, and mainly functions to guarantee information security, integrity and other problems of other node devices during transaction, for example: the blockchain transaction platform 201 may be a server, a server group, a cloud server, and may also be referred to as a system, a user unit, and the like. For example: when the blockchain transaction platform 201 is a server, the blockchain transaction platform 201 may receive a target transaction request sent by the first blockchain node 202, where the target transaction request includes identity information of the first blockchain node and identity information of the second blockchain node; the blockchain transaction platform 201 verifies whether the identity information of the first blockchain node 202 and the identity information of the second blockchain node 203 are legal; if the transaction authority is legal, the blockchain transaction platform 201 grants the transaction authority between the first blockchain node 202 and the second blockchain node 203, wherein the transaction authority includes the access authority of the first blockchain node 202 to the identity information of the second blockchain node 203 and the access authority of the second blockchain node 203 to the identity information of the first blockchain node 202.

The first blockchain node 202 is another node device in the blockchain system, and the node device may be a terminal held by a vendor user, for example: when the first blockchain node 202 is a smart phone, first, the first blockchain node 202 may send a target transaction request to the blockchain transaction platform 201; then the first blockchain node 202 receives the transaction right granted by the blockchain transaction platform 201 to the second blockchain link node 203, wherein the transaction right includes the access right of the first blockchain node 202 to the identity information of the second blockchain node 203 and the access right of the second blockchain node 203 to the identity information of the first blockchain node 202; finally, the first blockchain node 202 may complete the transaction corresponding to the target transaction request with the second blockchain node 203 according to the transaction right.

The second blockchain node 203 is another node device in the blockchain system, and the node device may be a terminal held by the buyer user, for example: when the second blockchain node 203 is a smart phone, firstly, the second blockchain node 203 may receive a target transaction request broadcast by the blockchain transaction platform 201, where the target transaction request includes identity information of the first blockchain node 202 and identity information of the second blockchain node 203; then the second blockchain node 203 receives the transaction authority granted by the blockchain transaction platform and the first blockchain node 202; and finally, the second blockchain node 203 completes the transaction corresponding to the target transaction request with the second blockchain node 202 according to the transaction authority.

The terminal may be a communication terminal, a mobile device, a User terminal, a mobile terminal, a wireless communication device, a portable terminal, a User agent, a User Equipment, a service device, or a User Equipment (UE) located at the outermost periphery of a network in a computer network, and is mainly used for data input, output or display of a processing result, and may also be a software client installed or running on any one of the above devices, an application program, and the like. For example, the terminal may be a mobile phone, a cordless phone, a smart watch, a wearable device, a tablet device, a handheld device with wireless communication capabilities, a computing device, a smart meter or other processing device connected to a wireless modem, and so forth.

The third blockchain node 204 is another node device in the blockchain system, and the node device may be a service device held by a country related organization, such as a server, a server group, a cloud server, and the like. When the third blockchain node 204 is a server of a bank, it can be used to complete a monetary transaction of the target product between the second blockchain node and the first blockchain node. When the third blockchain node 204 is a service platform of a public security organization, it can be used for the blockchain transaction platform to verify the identity information of the first blockchain node 202 and the identity information of the second blockchain node 203.

It will be appreciated that blockchain nodes for a plurality of buyers or sellers may also be included in a blockchain-based transaction system architecture. It is further understood that the blockchain-based transaction system architecture in fig. 2 is only an exemplary implementation manner in the embodiment of the present application, and the transaction system architecture in the embodiment of the present application includes, but is not limited to, the above transaction system architecture.

Based on the block chain-based transaction system architecture provided in fig. 2, the technical problem provided in the present application is specifically analyzed and solved in combination with the block chain-based transaction method provided in the present application.

Referring to fig. 3, fig. 3 is a flowchart illustrating a blockchain-based transaction method according to an embodiment of the present application, where the method may be applied to the blockchain-based transaction system architecture described in fig. 2, where a blockchain transaction platform 201 may be configured to support and execute the method flow steps S302-S303, S305, and S308-S310 shown in fig. 3, a first blockchain node 202 may be configured to support and execute the method flow steps S301, S306-S307, and S311 shown in fig. 3, and a second blockchain node 203 may be configured to support and execute the method flow steps S304 and S311 shown in fig. 3. A description will be made below with reference to fig. 3 from three ends of the blockchain trading platform 201, the first blockchain node 202, and the second blockchain node 203. The method may include the following steps S301 to S311.

Step S301: and the first blockchain node sends the selling information of the target commodity to the blockchain trading platform.

Specifically, it should be noted that the first block link point may be a first terminal held by a user of the vendor, where the first terminal may be a smart phone, a tablet computer, or a smart band. Therefore, it may be considered that the first terminal sends the selling information of the target product to the blockchain trading platform, where the selling information includes privacy information of the first blockchain node and the product information, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target product, and proof information that the first blockchain node holds tradable right of the target product.

Optionally, the identity information of the first blockchain node may include identity information of the seller user and/or identification information of the first terminal, where the identification information is used to uniquely identify the first terminal; the proof information that the first block link point holds the ownership of the target commodity can be understood as the proof information that the seller user holds the ownership of the target commodity; the first block link may point the proof information of the tradable right of the target product, which is understood as the proof information of the tradable right of the target product held by the seller user. For example: if the target commodity sent by the seller user is a commodity (such as a house, an automobile, a patent and the like) which requires the seller to prove that the owner and/or the trade right of the target commodity is/are available, the privacy information needs to include proving information which can prove that the owner and/or the trade right of the target commodity is/are available for the seller user (such as a house property certificate, a purchase record of the target commodity, a patent certificate and the like) so as to ensure the validity of the trade of the target commodity.

Optionally, the identity information of the first blockchain node may be identity information of the seller user, where the identity information may include one or more of an identity number of the seller user, a user account number (such as a naughty code, a jingdong code, and the like in the prior art) corresponding to the blockchain transaction platform, a driver's license number, and a passport number; the commodity information may be information for actually describing a target commodity, which is broadcast on a blockchain transaction platform, and may be conveniently retrieved by a buyer user to know the target commodity, so that the commodity information may include one or more of name, price, category, efficacy, appearance, damage information, photo information, and video information recorded with the target commodity, for example: the target commodity is a mobile phone, the commodity information can be HUAWEI P20Pro blue, the purchase date is 2019, 6 months, 10 days, Monday, three years in warranty period, the screen is intact, the purchase evidence information and the photo of the mobile phone, and even the commodity information can also comprise video information recorded with a HUAWEI P20Pro mobile phone used or displayed.

Optionally, before the first blockchain node sends the selling information of the target product to the blockchain trading platform, the method further includes: the blockchain trading platform also needs to broadcast the smart contracts to each blockchain node in the blockchain trading platform. The intelligent contract may include transaction steps and transaction rights between blockchain nodes in the blockchain transaction platform. The trading step can be that the product traded on the blockchain trading platform needs to comply with the trading step in the intelligent contract. For example: according to the intelligent contract blockchain trading platform, after the selling information of the target commodity sent by the first blockchain node is received, whether the commodity information is real or not is verified. The transaction authority may be that privacy information of both transaction parties is authorized access information, and only both transaction parties and authorized blockchain nodes (e.g., banks, transaction platforms, national registration institutions, etc.) can access the information, for example, according to an intelligent contract blockchain transaction platform, only a blockchain link point having an access authority of a first blockchain node can access or acquire identity information of the first blockchain node, and a blockchain link point not having an access authority of the first blockchain node cannot access or acquire identity information of the first blockchain node. Through the intelligent contract characteristic of the block chain, each step of the transaction is carried out according to a set program, so that the safety and credibility of the transaction process are ensured; and each block on the block chain node comprises the operation information and the time information of the previous block, so that each step of the transaction process is ensured to be publicly supervised, and the fairness of the whole transaction is ensured.

Step S302: after receiving the selling information of the target commodity sent by the first blockchain node, the blockchain trading platform verifies whether the commodity information is real, and determines whether the first blockchain node has the ownership and/or tradeable right of the target commodity according to the privacy information.

Specifically, after receiving the selling information of the target commodity sent by the first blockchain node, the blockchain trading platform verifies whether the commodity information is real, and determines whether the first blockchain link point holds the ownership and/or the tradable right of the target commodity according to the privacy information. The selling information includes one or more of identity information of the first block chain node, proof information that the first block chain node holds the ownership of the target commodity, and proof information that the first block chain node holds the tradable right of the target commodity, so that the block chain trading platform can verify whether the commodity information is real according to the received selling information, and determine whether the first block chain node holds the ownership and/or tradable right of the target commodity. Optionally, before the seller user wants to sell the target product, the seller user needs to go through verification of the authenticity of the target product, ownership and/or trade right of the target product held by the seller user through the blockchain trading platform, and only the target product passing the verification can continue trading. The commodity information may include one or more of a name, a price, a category, an efficacy, an appearance, damage information, photo information, and video information recorded with the target commodity, so that the blockchain transaction platform may verify whether the target commodity really exists according to the commodity information, and if the item described in the commodity information is the target commodity, the blockchain transaction platform may determine whether the target commodity is real. For example: the commodity information describes a HUAWEI P20Pro yellow mobile phone, but the blockchain transaction platform determines that the HUAWEI P20Pro series does not have a yellow mobile phone, so that the blockchain transaction platform can consider that the mobile phone information is unreal, and further the HUAWEI P20Pro yellow mobile phone can not perform transaction on the blockchain transaction platform.

Optionally, the blockchain trading platform may send one or more of the proof information that the first blockchain link point holds the ownership of the target product and the proof information that the first blockchain link point holds the tradable right of the target product to a country-related organization (e.g., a housing administration, a vehicle administration, etc.), and the country-related organization verifies the ownership and/or tradable right of the seller user on the target product: after the verification of the country-related institution is passed, the country-related institution sends confirmation information to the blockchain trading platform, wherein the confirmation information comprises information of ownership and/or trading right of the target commodity held by the seller user, and then the blockchain trading platform determines whether the first blockchain link point holds the ownership and/or trading right of the target commodity according to the confirmation information.

Step S303: if the commodity information is real and the first block chain node holds the ownership and/or tradeable right of the target commodity, the block chain trading platform broadcasts the selling information to each block chain node of the block chain trading platform.

Specifically, if the blockchain trading platform verifies that the commodity information is real, and the first blockchain link point holds the ownership and/or tradable right of the target commodity, the blockchain trading platform broadcasts the selling information to each blockchain node of the blockchain trading platform. If the blockchain trading platform verifies that the commodity information is not true, or the first blockchain link point does not hold the ownership and/or tradeable right of the target commodity, the blockchain trading platform does not broadcast the selling information to each blockchain node of the blockchain trading platform, that is, the target commodity cannot be traded on the blockchain trading platform. It can be understood that the blockchain trading platform broadcasts the selling information to each blockchain link point of the blockchain trading platform to prove that the target product is real, and the first blockchain link point holds the ownership and/or tradeable right of the target product, and the target product can be legally traded.

Optionally, the blockchain trading platform may further broadcast verification information that the commodity information is real and the first blockchain node holds the ownership and/or tradable right of the target commodity together with the selling information to each blockchain node of the blockchain trading platform.

Step S304: and the second blockchain node sends a transaction request to the blockchain transaction platform.

Specifically, it should be noted that the second block link point may be a second terminal held by the buyer user, where the second terminal may be a smart phone, a tablet computer, or a smart band. Therefore, the second blockchain node sends the transaction request to the blockchain transaction platform, and may send the transaction request to the blockchain transaction platform for the second terminal, that is, after the buyer user browses the goods on the blockchain transaction platform and determines the target goods to be purchased, the second terminal is used to send the transaction request to the blockchain transaction platform, where the transaction request includes the identity information of the second blockchain node and a product identifier, and the product identifier is used to uniquely identify the target goods, where optionally, the identity information of the second blockchain node may include the identity information of the buyer user and/or the identity information of the second terminal, and the identity information is used to uniquely identify the second terminal. For example: the transaction request may be the user account number plus the product identification of the target good. Optionally, the identity information of the second blockchain node may be identity information of the buyer user, and the identity information may include an identity number of the buyer user and a user account corresponding to the blockchain transaction platform (e.g., a naughty number, a kyoto number, etc. in the prior art). Optionally, the transaction request may further include price information of the target product, and the price information may be price information determined by the buyer user and different from that of the seller user.

Step S305: the blockchain trading platform receives one or more trading requests sent by one or more blockchain nodes.

Specifically, the blockchain transaction platform receives one or more transaction requests sent by one or more blockchain nodes, where the one or more blockchain nodes include the second blockchain node, and the transaction request includes identity information and a product identifier corresponding to the blockchain node, where the product identifier is used to uniquely identify the target product, for example, each product to be sold on the blockchain transaction platform has a unique product code corresponding thereto, and the product identifier may be a unique product code used to identify the target product on the blockchain transaction platform, where the product code may be generated or allocated by the blockchain transaction platform for the target product when a seller user wants the blockchain transaction platform to send sale information. It is to be understood that the blockchain trading platform may receive one or more trading requests for a target commodity sent by one or more blockchain nodes, each of the one or more trading requests corresponds to one blockchain node, and each of the one or more trading requests may include the identity information and the product identifier of the corresponding blockchain node. It will be appreciated that each of the remaining blockchain nodes on the blockchain trading platform, except for the first blockchain node, may send a trade request to the blockchain trading platform before the trade for the target commodity is locked.

Step S306: the first block link point receives one or more transaction requests sent by the block chain transaction platform to one or more block chain nodes forwarded by the first block link point.

Specifically, after receiving one or more transaction requests sent by one or more blockchain nodes, the blockchain transaction platform needs to send all transaction requests received by the blockchain transaction platform to the first blockchain node, and the first blockchain link point may receive the one or more transaction requests sent by the blockchain transaction platform to the one or more blockchain nodes forwarded by the blockchain transaction platform to the first blockchain link point. Optionally, the transaction request received by the first blockchain node may be a transaction request immediately sent by the blockchain transaction platform after receiving the transaction request, or a transaction request sent by the blockchain transaction platform according to a preset period after receiving the transaction request, or a plurality of transaction requests sent by the blockchain transaction platform to the first blockchain node when the number of transaction requests received by the blockchain transaction platform reaches the preset number of the first blockchain node.

Step S307: the first blockchain node sends a target transaction request to the blockchain transaction platform.

Specifically, after the first block link node receives one or more transaction requests sent by the block chain transaction platform to one or more block chain nodes forwarded by the first block link node, one transaction request may be selected from the received one or more transaction requests to serve as a target transaction request of a target commodity, and then the first block chain node sends the target transaction request to the block chain transaction platform, where the target transaction request includes identity information of the first block chain node and identity information of the second block chain node. Optionally, the first blockchain node may determine that the target transaction request is the one of the plurality of transaction requests that is the earliest (e.g., the earliest is sent to the blockchain transaction platform), that is, that the buyer has the highest credit (e.g., the highest credit in the historical shopping records of the blockchain node or the users to which the blockchain node belongs), or that the bid is the highest (e.g., the highest bid for the target commodity).

Step S308: after receiving a target transaction request sent by a first blockchain node, a blockchain transaction platform verifies whether the identity information of the first blockchain node and the identity information of a second blockchain node are legal or not.

Specifically, the target transaction request includes identity information of a first blockchain node and identity information of a second blockchain node, so that the blockchain transaction platform can verify whether the identity information of the first blockchain node and the identity information of the second blockchain node are legal or not through the received target transaction request. For example: when the identity information of the first block chain node comprises the identity card number of the seller user and the identity information of the second block chain node comprises the identity card number of the buyer user, whether the identities of the seller user and the buyer user are real can be directly verified, and whether the seller user and the buyer user are legal citizens can be verified. Optionally, if the blockchain transaction platform cannot directly verify whether the identity information of the first blockchain node and the identity information of the second blockchain node are legal, the identity information of the first blockchain node and the identity information of the second blockchain node may be sent to a national relevant organization (e.g., a public security organization) for further verification, and then the blockchain transaction platform may determine that the identity information of the first blockchain node and the identity information of the second blockchain node are legal according to the information that the national relevant organization passes the verification.

Step S309: and if the first block chain node is legal, the block chain trading platform grants the trading authority between the first block chain node and the second block chain node.

Specifically, after the blockchain trading platform verifies that the identity information of the first blockchain node and the identity information of the second blockchain node are legal, the blockchain trading platform grants a trading right between the first blockchain node and the second blockchain node, wherein the trading right includes an access right of the first blockchain node to the identity information of the second blockchain node and an access right of the second blockchain node to the identity information of the first blockchain node.

Optionally, the granting, by the blockchain trading platform, the trading right between the first blockchain node and the second blockchain link point includes authorization information of sending, by the blockchain trading platform, the trading right to the first blockchain node and the second blockchain link point, respectively; the method can also comprise that after the block chain transaction platform sends authorization information of transaction authority to the first block chain node, the first block chain node forwards the authorization information of transaction authority to the second block chain node; the method may further include that after the blockchain transaction platform sends authorization information of the transaction right to the second blockchain link point, the second blockchain node forwards authorization information of the transaction right to the first blockchain link point, where the authorization information may be determined by the blockchain transaction platform according to an intelligent contract, the authorization information may enable the first blockchain link point to access or acquire identity information of the second blockchain node, and the second blockchain link point may access or acquire access right of the identity information of the first blockchain node, and the authorization information may be, for example, an access address, a key, and the like. The access authority of the first block link point to the identity information of the second block link node may be to allow the first block link point to access or acquire a private block chain on the second block link point, where the private block chain may be used to store the privacy information of the second block chain node; the access right of the second block link point to the identity information of the first block link node may be to allow the second block link point to access or acquire a private block chain on the first block link point, where the private block chain may be used to store the privacy information of the first block chain node. It can also be understood that, if the blockchain trading platform does not grant the trading authority between the first blockchain node and the second blockchain node, the first blockchain node cannot view the identity information of the second blockchain node, and the second blockchain node cannot view the identity information of the first blockchain node.

Step S310: if the target transaction request is legal, the blockchain transaction platform broadcasts the target transaction request to each blockchain node in the blockchain transaction platform.

Specifically, after the blockchain transaction platform verifies that the identity information of the first blockchain node and the identity information of the second blockchain node are legal, the blockchain transaction platform broadcasts the target transaction request to each blockchain node in the blockchain transaction platform, and can inform each blockchain node in the blockchain transaction platform that the first blockchain node and the second blockchain node have achieved transaction intention about the target commodity, and the blockchain transaction platform no longer receives the transaction request sent by a third party blockchain node for the target commodity, so that the transaction state of the target commodity is locked, and the transaction rights and interests of both the first blockchain node and the second blockchain node are protected.

Step S311: and the first block chain node completes the transaction corresponding to the target transaction request with the second block chain node according to the transaction authority.

Specifically, after the blockchain transaction platform verifies that the identity information of the first blockchain node and the identity information of the second blockchain node are legal, the first blockchain link point can complete the transaction corresponding to the target transaction request according to the transaction authority and the second blockchain link point, and the transaction authority can allow the first blockchain and the second blockchain to perform transactions in the forms of money, points and the like. For example: the block chain transaction platform can send money transaction information to the banking institution, and the money transaction information can be used for transferring funds corresponding to the target commodity from an account corresponding to the second block chain link point to an account corresponding to the first block chain link point.

Optionally, before the first block link point completes the transaction corresponding to the target transaction request with the second block link point according to the transaction right, the method further includes that the first block link point sends logout information to a related mechanism (such as a bank) through a block chain transaction platform, and the logout information is used for logging out the mortgage of the target commodity on the related mechanism. And the target commodity can continue to carry out the transaction corresponding to the target transaction request after the target commodity cancels the mortgage.

Optionally, after the first block link point completes the transaction corresponding to the target transaction request according to the transaction permission and the second block link point, the method further includes that the second block chain sends first mortgage information to a related mechanism (such as a bank) through a block chain transaction platform, the first mortgage information includes identity information of the second block chain and commodity information of the target commodity, and the first mortgage information is used for the second block link point to mortgage the target commodity to the related mechanism.

Optionally, the method further includes sending, by the second blockchain, second mortgage information to a relevant institution (e.g., a bank) through the blockchain trading platform, where the second mortgage information includes identity information of the second blockchain and article information of the target article, and the mortgage information is used for the second blockchain to mortgage the target article to the relevant institution, where the target article is an article for which the second blockchain has a trading right and/or a trading right.

According to the method and the device for processing the block chain transaction requests, the block chain transaction platform firstly receives the target transaction request sent by the first block chain node, then verifies the identity information of the first block chain node and the identity information of the second block chain node contained in the target transaction request, if the block chain transaction platform verifies that the identity information of the first block chain node and the identity information of the second block chain node are both legal, the block chain transaction platform grants the transaction permission of the first block chain node and the transaction permission of the second block chain node, so that the first block chain node has the access permission to the identity information of the second block chain node, and the second block chain node has the access permission to the identity information of the first block chain node. Therefore, the transaction method based on the block chain can grant the transaction authority of the buyer and the seller after verifying the identity information of the buyer and the seller is legal, not only can disclose the whole transaction flow and the transaction information to the participant of the transaction, but also can keep the privacy information (such as identity information, transaction address, certification information and the like) which is sensitive to the participant at the same time, so that only the participant with the authority can check the privacy information Transparent and secure transactions.

With reference to the architecture diagram of a block chain-based transaction system provided in fig. 2 and the flowchart of a block chain-based transaction method provided in fig. 3, please refer to fig. 4, where fig. 4 is an application scenario flowchart of a block chain-based transaction method provided in an embodiment of the present application, where a first block chain node in the present application is a seller a in the embodiment of the present application, a second block chain node in the present application is a buyer B in the embodiment of the present application, a block chain transaction platform in the present application is a transaction platform C in the embodiment of the present application, and a third block chain node in the present application is a bank D and a national registration agency E in the embodiment of the present application, the specific implementation manner may include the following process steps:

application scenarios: the seller A and the buyer B trade target commodities on the trading platform C, the target commodities are mortared by the seller A, and the buyer B mortises commodities which have trading rights and/or can trade rights.

1. And the trading platform C issues a trading system intelligent contract and informs all the block chain nodes to update through a broadcast message.

2. The transaction seller a issues a request for product sale information to the transaction platform C.

3. The transaction platform C first verifies the product information of the seller a.

4. And after the transaction platform C passes the verification, the transaction platform C issues the product sale information of the seller A through the broadcast message, and after the verification message passes all other blockchain nodes, the other blockchain nodes are updated to respective local accounts.

5. Thereafter, the national registration agency E needs to verify the ownership and tradable rights of the seller a for its sold items.

6. After the verification is passed, E confirms ownership and transaction right of the seller A to the sold article through broadcast information, and after the verification information is passed, all other blockchain nodes are updated to respective local accounts; at this point, the item formally enters a state to be sold.

7. The transaction buyer B inquires the information of the product to be sold on the platform transaction platform C and sends a transaction request to the transaction platform C.

8. After receiving the message requesting purchase, seller A selects to confirm sale and sends a confirmation request to the transaction platform C.

9. Upon receiving seller a's confirmation to recognize the sale message, the transaction platform C first verifies the buyer's seller a and buyer B information of both buyer and seller.

10. After the verification is passed, the transaction platform C confirms the transaction through the broadcast message, and after all other blockchain nodes receive the broadcast message, the message passing the information verification of the buyer and seller A and the buyer B is updated to respective local account book; at this point, the primary purchase intent between seller A and buyer B is reached.

11. If the article to be sold of the seller A is mortgaged, the article mortgage needs to be cancelled first; a request to deregister an item mortgage is initiated by seller a to platform trading platform C.

12. And the transaction platform C issues a request for canceling the mortgage of the article through the broadcast message, and after the verification message passes, all other block chain nodes are updated to respective local accounts.

13. The bank D firstly verifies the information of the mortgage articles and all the people, and accepts the mortgage logout after the verification is passed.

14. And the bank D issues a broadcast message after processing the object mortgage logout, and all other block chain nodes are updated to respective local accounts after passing the verification message.

15. The national registration agency E confirms the mortgage cancellation and updates the mortgage registration information of the article.

16. The national registration agency E issues a broadcast message, and after the verification message passes, all other block chain nodes are updated to respective local accounts; at this point, seller a successfully logs out the mortgage on the item for sale.

17. Meanwhile, if the buyer B applies for the mortgage of the goods with the transaction right and/or the transaction right, the mortgage application is also required to be submitted to the platform transaction platform C.

18. And the transaction platform C issues a request for mortgage through the broadcast message, and after the verification message passes, all other block chain nodes are updated to respective local accounts.

19. The bank D firstly verifies the information of the mortgage articles and the owner of the mortgage articles, and receives the mortgage application after the mortgage articles pass the verification.

20. And the bank D issues a broadcast message for accepting the mortgage application, and after the verification message passes, all other block chain nodes are updated to respective local accounts.

21. The national registration agency E confirms the mortgage application and updates the mortgage registration information of the mortgage article.

22. And the national registration mechanism E issues a broadcast message after mortgage registration information, and all other block chain nodes are updated to respective local accounts after verification information passes.

23. Bank D processes the subsequent flow of the mortgage of the goods and deposits a fee to buyer B.

24. The bank D issues a broadcast message to confirm the payment is successful after the payment is successfully placed, and all other blockchain nodes are updated to respective local accounts after the verification message passes; at this point, buyer B completes the item mortgage and obtains the mortgage money successfully.

Then, repeating the steps 5-10, such as the authentication of the national registration agency E on the article authority, the verification of the platform transaction platform C on the information of the buyer and the seller, the transfer of the fund from the buyer B to the seller A by the bank D and the like, and informing all other block chain nodes to update to respective local accounts in a mode of issuing broadcast messages after the verification messages pass after each step is completed; after the above operations are completed, the national registration agency E refreshes ownership information of the transaction article (the original owner seller A is changed into the current owner buyer B, and sends a broadcast message, and all other block chain nodes are updated to respective local accounts after the verification message passes, so that the whole transaction process is successful and finished.

The method of the embodiments of the present application is explained in detail above, and the related apparatus of the embodiments of the present application is provided below.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a blockchain-based transaction apparatus provided in an embodiment of the present application, where the blockchain-based transaction apparatus is applied to a blockchain transaction platform 201, and the blockchain-based transaction apparatus 10 may include a first receiving unit 501, a verifying unit 502, and an authorization unit 503, and may further include a first broadcasting unit 504, a second receiving unit 505, a second broadcasting unit 506, a third receiving unit 507, and a forwarding unit 508, where details of each unit are described below.

A first receiving unit 501, configured to receive a target transaction request sent by a first blockchain node, where the target transaction request includes identity information of the first blockchain node and identity information of a second blockchain node.

A verifying unit 502, configured to verify whether the identity information of the first blockchain node and the identity information of the second blockchain node are legal.

An authority unit 503, configured to grant a transaction authority between the first block link node and the second block link node if the first block link node is legal, where the transaction authority includes an access authority of the first block link node to the identity information of the second block link node and an access authority of the second block link node to the identity information of the first block link node.

In one possible implementation, the blockchain trading platform further includes: a first broadcasting unit 504, configured to broadcast the target transaction request to each blockchain node in the blockchain transaction platform if the target transaction request is legal.

In one possible implementation, the target transaction request further includes commodity information of the target commodity; the blockchain trading platform further comprises: a second receiving unit 505, configured to receive, before receiving a target transaction request sent by the first blockchain node, sales information of the target product sent by the first blockchain node, where the sales information includes privacy information and the product information, where the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target product, and proof information that the first blockchain node holds tradable right of the target product; a second broadcasting unit 506, configured to broadcast the selling information to each node of the blockchain trading platform.

In a possible implementation manner, the second broadcasting unit 506 is specifically configured to verify whether the product information is authentic, and determine whether the first block link point holds ownership and/or tradable right of the target product according to the privacy information; if the commodity information is real and the first block chain node holds the ownership and/or the tradable right of the target commodity, the block chain trading platform broadcasts the selling information to each block chain node of the block chain trading platform.

In one possible implementation, the blockchain trading platform further includes: a third receiving unit 507, configured to receive one or more transaction requests sent by one or more blockchain nodes, where the one or more blockchain nodes include the second blockchain node, the transaction request includes the identity information and a product identifier corresponding to the blockchain node, and the product identifier is used to uniquely identify the target product; a forwarding unit 508, configured to forward the one or more transaction requests to the first block link point.

It should be noted that, for the functions of each functional unit in the transaction apparatus 10 based on the blockchain described in the embodiment of the present application, reference may be made to the related description of step S301 to step S311 in the embodiment of the method described in fig. 3, and details are not repeated here.

Referring to fig. 6, fig. 6 is a schematic structural diagram of another transaction apparatus based on a blockchain according to an embodiment of the present disclosure, where the transaction apparatus based on a blockchain is applied to a blockchain node, where the blockchain node is a first blockchain node 202, and the blockchain-based transaction apparatus 20 may include a first sending unit 601, a fourth receiving unit 602, and a first transaction unit 603, and may further include a fifth receiving unit 604 and a second sending unit 605, where details of each unit are described below.

A first sending unit 601, configured to send a target transaction request to a blockchain transaction platform, where the target transaction request includes identity information of the first blockchain node and identity information of a second blockchain node.

A fourth receiving unit 602, configured to receive a transaction right granted by the blockchain transaction platform and between the second blockchain link point and the transaction right, where the transaction right includes an access right of the first blockchain link point to the identity information of the second blockchain node and an access right of the second blockchain link point to the identity information of the first blockchain node.

A first transaction unit 603, configured to complete a transaction corresponding to the target transaction request according to the transaction right and the second block link point.

In one possible implementation manner, the first blockchain node further includes: a fifth receiving unit 604, configured to receive a transaction request sent by one or more blockchain nodes forwarded by the blockchain transaction platform, where the one or more blockchain nodes include the second blockchain node, where the transaction request sent by any one blockchain node includes identity information and a product identifier of the corresponding blockchain node, and the product identifier is used to uniquely identify a target commodity; a first determining unit, configured to determine, by the first blockchain node, the target transaction request from the transaction requests sent by the one or more blockchain nodes.

In one possible implementation manner, the first blockchain node further includes: a second sending unit 605, configured to send, before receiving a transaction request sent by one or more blockchain nodes forwarded by the blockchain transaction platform, sale information of the target product to the blockchain transaction platform, where the sale information includes privacy information of the first blockchain node and product information of the target product, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target product, and proof information that the first blockchain node holds tradable right of the target product.

It should be noted that, for the functions of each functional unit in the transaction apparatus 20 based on the blockchain described in the embodiment of the present application, reference may be made to the related description of step S301 to step S311 in the embodiment of the method described in fig. 3, and details are not repeated here.

Referring to fig. 7, fig. 7 is a schematic structural diagram of another blockchain-based transaction apparatus provided in the embodiment of the present application, where the blockchain-based transaction apparatus is applied to a blockchain node, the blockchain node is a second blockchain node 203, and the blockchain-based transaction apparatus 30 may include a sixth receiving unit 701, a seventh receiving unit 702, and a second transaction unit 703, and may further include an eighth receiving unit 704 and a third sending unit 705, where details of each unit are described below.

A sixth receiving unit 701, configured to receive the target transaction request broadcast by the blockchain transaction platform, where the target transaction request includes identity information of the first blockchain node and identity information of the second blockchain node.

A seventh receiving unit 702, configured to receive a transaction right granted by the blockchain transaction platform to the first blockchain link point, where the transaction right includes an access right of the first blockchain link point to the identity information of the second blockchain node and an access right of the second blockchain link point to the identity information of the first blockchain node.

The second transaction unit 703 is configured to complete a transaction corresponding to the target transaction request according to the transaction right and the first block link point.

In one possible implementation, the apparatus further includes: an eighth receiving unit 704, configured to receive selling information broadcast by the blockchain trading platform, where the selling information includes privacy information and commodity information of a target commodity, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity.

In one possible implementation, the target transaction request further includes commodity information of the target commodity; the device further comprises: a third sending unit 705, configured to send a transaction request of the target product to the blockchain transaction platform, where the transaction request includes identity information of a second blockchain node and a product identifier, and the product identifier is used to uniquely identify the target product.

It should be noted that, for the functions of each functional unit in the transaction apparatus 30 based on the blockchain described in the embodiment of the present application, reference may be made to the related description of step S301 to step S311 in the embodiment of the method described in fig. 3, and details are not repeated here.

As shown in fig. 8, fig. 8 is a schematic structural diagram of another blockchain-based transaction apparatus provided in the embodiment of the present application, where the apparatus 40 includes at least one processor 801, at least one memory 802, and at least one communication interface 803. In addition, the device may also include common components such as an antenna, which will not be described in detail herein.

The processor 801 may be a general purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs according to the above schemes.

Communication interface 803 is used for communicating with other devices or communication Networks, such as ethernet, Radio Access Network (RAN), core network, Wireless Local Area Networks (WLAN), etc.

The Memory 802 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The memory 802 is used for storing application program codes for executing the above schemes, and is controlled by the processor 801 to execute. The processor 801 is used to execute application program code stored in the memory 802.

The memory 802 stores code that can perform the blockchain based transaction method provided in fig. 3 above, for example, when the apparatus 40 is the blockchain transaction platform 201, a target transaction request sent by a first blockchain node can be received, where the target transaction request includes identity information of the first blockchain node and identity information of a second blockchain node; verifying whether the identity information of the first blockchain node and the identity information of the second blockchain node are legal or not; and if the access authority is legal, granting the transaction authority between the first block chain node and the second block chain node, wherein the transaction authority comprises the access authority of the first block chain node to the identity information of the second block chain node and the access authority of the second block chain node to the identity information of the first block chain node.

It should be noted that, for the functions of each functional unit in the transaction apparatus 40 based on the blockchain described in the embodiment of the present application, reference may be made to the description related to step S301 to step S311 in the method embodiment described in fig. 3, and details are not repeated here.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a storage medium, and including several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, and may specifically be a processor in the computer device) to execute all or part of the steps of the above-mentioned method of the embodiments of the present application. The storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a magnetic disk, an optical disk, a Read-only memory (ROM) or a Random Access Memory (RAM).

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A blockchain based transaction method, the method comprising:

a blockchain trading platform receives a target trading request sent by a first blockchain node, wherein the target trading request comprises identity information of the first blockchain node and identity information of a second blockchain node;

the blockchain transaction platform verifies whether the identity information of the first blockchain node and the identity information of the second blockchain node are legal or not;

and if the transaction authority is legal, the block chain transaction platform grants the transaction authority between the first block chain node and the second block chain node, wherein the transaction authority comprises the access authority of the first block chain node to the identity information of the second block chain node and the access authority of the second block chain node to the identity information of the first block chain node.

2. The method of claim 1, further comprising:

and if the target transaction request is legal, the blockchain transaction platform broadcasts the target transaction request to each blockchain node in the blockchain transaction platform.

3. The method of claim 1 or 2, wherein the target transaction request further comprises commodity information of a target commodity; before the blockchain trading platform receives the target trading request sent by the first blockchain node, the method further includes:

the blockchain trading platform receives selling information of the target commodity sent by the first blockchain node, wherein the selling information comprises privacy information and commodity information, and the privacy information comprises one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity;

the blockchain trading platform broadcasts the sale information to each node of the blockchain trading platform.

4. The method of claim 3, wherein the broadcasting of the sale information by the blockchain trading platform to each node of the blockchain trading platform comprises:

the block chain trading platform verifies whether the commodity information is real or not, and determines whether the first block chain link point holds the ownership and/or tradeable right of the target commodity or not according to the privacy information;

if the commodity information is real and the first block chain node holds the ownership and/or the tradable right of the target commodity, the block chain trading platform broadcasts the selling information to each block chain node of the block chain trading platform.

5. The method of claim 3 or 4, further comprising:

the block chain transaction platform receives transaction requests sent by one or more block chain nodes, wherein the one or more block chain nodes comprise the second block chain node, the transaction request sent by any one block chain node comprises identity information and a product identifier of the corresponding block chain node, and the product identifier is used for uniquely identifying the target commodity;

and the blockchain trading platform forwards the trading request sent by the one or more blockchain nodes to the first blockchain link point.

6. A blockchain based transaction method, the method comprising:

a first blockchain node sends a target transaction request to a blockchain transaction platform, wherein the target transaction request comprises identity information of the first blockchain node and identity information of a second blockchain node;

the first block link point receives a trading right between the second block link point and the first block link point, wherein the trading right comprises an access right of the first block link point to the identity information of the second block link node and an access right of the second block link point to the identity information of the first block link node;

and the first block chain node completes the transaction corresponding to the target transaction request according to the transaction authority and the second block chain node.

7. The method of claim 6, further comprising:

the first block chain node receives a transaction request sent by one or more block chain nodes forwarded by the block chain transaction platform, wherein the one or more block chain nodes comprise the second block chain node, the transaction request sent by any one block chain node comprises identity information and a product identifier of the corresponding block chain node, and the product identifier is used for uniquely identifying a target commodity;

the first blockchain node determines the target transaction request from the transaction requests sent by the one or more blockchain nodes.

8. The method of claim 7, wherein before the first blockchain link node receives the transaction request sent by one or more blockchain nodes forwarded by the blockchain transaction platform, the method further comprises:

the first blockchain node sends selling information of the target commodity to the blockchain trading platform, wherein the selling information comprises privacy information of the first blockchain node and commodity information of the target commodity, and the privacy information comprises one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity.

9. A blockchain based transaction method, the method comprising:

a second block chain node receives the target transaction request broadcast by a block chain transaction platform, wherein the target transaction request comprises identity information of a first block chain node and identity information of a second block chain node;

the second block link point receives a trading right granted by the block chain trading platform to the first block link point, wherein the trading right comprises an access right of the first block link point to the identity information of the second block chain node and an access right of the second block link point to the identity information of the first block chain node;

and the second block chain node completes the transaction corresponding to the target transaction request according to the transaction authority and the first block chain node.

10. The method of claim 9, further comprising:

the second block link point receives selling information broadcast by the block chain trading platform, wherein the selling information comprises privacy information and commodity information of a target commodity, and the privacy information comprises one or more of identity information of the first block chain node, proof information of ownership of the target commodity held by the first block link point, and proof information of tradable right of the target commodity held by the first block link point.

11. The method of claim 9, wherein the target transaction request further includes merchandise information of the target merchandise; the method further comprises the following steps:

and the second blockchain node sends a transaction request of the target commodity to the blockchain transaction platform, wherein the transaction request comprises the identity information of the second blockchain node and a product identifier, and the product identifier is used for uniquely identifying the target commodity.

12. A blockchain trading platform, the trading platform comprising:

13. The trading platform of claim 12, further comprising:

the first broadcasting unit is used for broadcasting the target transaction request to each blockchain node in the blockchain transaction platform if the target transaction request is legal.

14. The trading platform of claim 12, wherein the target trading request further includes commodity information for a target commodity; the trading platform further comprises:

a second receiving unit, configured to receive, before a target transaction request sent by the first blockchain node is received, sales information of the target product sent by the first blockchain node, where the sales information includes privacy information and the product information, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target product, and proof information that the first blockchain node holds tradable right of the target product;

and the second broadcasting unit is used for broadcasting the selling information to each node of the blockchain trading platform.

15. The trading platform of claim 14, wherein the second broadcast unit is specifically configured to broadcast the second content to the second client device

Verifying whether the commodity information is real or not, and determining whether the first block link point holds the ownership and/or tradable right of the target commodity or not according to the privacy information;

if the commodity information is real and the first block chain node holds the ownership and/or the tradable right of the target commodity, the selling information is broadcasted to each block chain node of the block chain trading platform.

16. The trading platform of claim 14, further comprising:

a third receiving unit, configured to receive a transaction request sent by one or more blockchain nodes, where the one or more blockchain nodes include the second blockchain node, where the transaction request sent by any one blockchain node includes identity information and a product identifier of the corresponding blockchain node, and the product identifier is used to uniquely identify the target product;

a forwarding unit, configured to forward, to the first blockchain link point, the transaction request sent by the one or more blockchain nodes.

17. A block link point, wherein the block link node is a first block link node, the first block link point comprising:

18. The first blockchain node of claim 17, wherein the first blockchain node further comprises:

a fifth receiving unit, configured to receive a transaction request sent by one or more blockchain nodes forwarded by the blockchain transaction platform, where the one or more blockchain nodes include the second blockchain node, where the transaction request sent by any one blockchain node includes identity information and a product identifier of the corresponding blockchain node, and the product identifier is used to uniquely identify a target commodity;

a first determining unit, configured to determine the target transaction request from the transaction requests sent by the one or more blockchain nodes.

19. The first blockchain node of claim 18, wherein the first blockchain node further comprises: a second sending unit, configured to send, to the blockchain trading platform, sale information of the target commodity before receiving a trading request sent by one or more blockchain nodes forwarded by the blockchain trading platform, where the sale information includes privacy information of the first blockchain node and commodity information of the target commodity, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity.

20. A block link point, wherein the block link node is a second block link node, the second block link point comprising:

21. The second blockchain node of claim 20, further comprising:

an eighth receiving unit, configured to receive selling information broadcast by the blockchain trading platform, where the selling information includes privacy information and commodity information of a target commodity, and the privacy information includes one or more of identity information of the first blockchain node, proof information that the first blockchain node holds ownership of the target commodity, and proof information that the first blockchain node holds tradable right of the target commodity.

22. The second blockchain node of claim 20, wherein the target transaction request further includes commodity information for the target commodity; the second blockchain node further comprises:

and a third sending unit, configured to send a transaction request of the target commodity to the blockchain transaction platform, where the transaction request includes identity information of a second blockchain node and a product identifier, and the product identifier is used to uniquely identify the target commodity.

23. A service device comprising a processor, a memory and a communication interface, wherein the memory is configured to store an information delivery computer program and the processor is configured to invoke the computer program to perform the method of any of claims 1-5.

24. A terminal device comprising a processor, a memory and a communication interface, wherein the memory is configured to store an information delivery computer program and the processor is configured to invoke the computer program to perform the method of any of claims 6-8 or 9-11.

25. A computer storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the method of any of the preceding claims 1-5 or 6-8 or 9-11.

26. A computer program, characterized in that the computer program comprises instructions which, when executed by a computer, cause the computer to carry out the method according to any one of claims 1-5 or 6-8 or 9-11.