CN108805656B - Supply and demand matching method, platform, system and computer readable storage medium - Google Patents
Supply and demand matching method, platform, system and computer readable storage medium Download PDFInfo
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Abstract
The invention discloses a supply and demand matching method, a platform, a system and a computer readable storage medium, and relates to the field of data processing. The supply and demand matching method comprises the following steps: a platform of a transaction block chain receives a demand message issued by a demand node and a supply message issued by a supply node of the transaction block chain; the platform generates an intelligent contract according to the demand message and the supply message, wherein the intelligent contract comprises a matching relation between demand nodes and supply nodes; the platform issues the intelligent contracts to the demand nodes and the supply nodes so that the demand nodes and the supply nodes execute the intelligent contracts; in response to the matched demand node and supply node confirming the transaction content according to the intelligent contract, the platform generates a contract script comprising the transaction content; the platform issues contract scripts to demand and supply nodes so that matching demand and supply nodes execute the contract scripts to fulfill transactions and record transaction information in a transaction blockchain. Thereby improving the safety and reliability in the supply and demand matching process.
Description
Technical Field
The present invention relates to the field of data processing, and in particular, to a supply and demand matching method, platform, system, and computer-readable storage medium.
Background
In the related technology, a public-oriented network direct marketing platform with the aim of 'scattered resource centralized management and centralized resource scattered service' can relieve the contradiction between the demands and supplies of industries such as food and drug resources and the like to a certain extent.
The public-oriented network direct marketing platform directly provides standardized services with high quality and low price to product demand parties in a point-to-point mode through the virtualization integration and allocation of dispersive food and drugs. The process is mainly as follows: firstly, the supply and demand bidirectional public network direct marketing platform of food and drug resources provides respective necessary information, such as identity identification, resource types, supply and demand information, transaction limits and the like; secondly, the public network direct marketing platform carries out virtualization integration on various dispersed food and drug resources under the support of technologies such as cloud end technology and the like, packages the food and drug resources, executes standardized services and realizes 'centralized management of scattered resources'; and finally, the public network direct marketing platform carries out dynamic transaction matching on the demand and supply of food and drug resources so as to realize scattered service of concentrated resources.
Disclosure of Invention
The inventor analyzes the related technology and finds that a set of reliable information security guarantee mechanism is not formed in the public network direct selling platform at present, the security and the transparency of transaction matching of a supplier and a demand supplier cannot be guaranteed, and the information on the public network direct selling platform faces the threat of being tampered and illegally used.
The embodiment of the invention aims to solve the technical problem that: how to improve the safety and reliability in the supply and demand matching process.
According to a first aspect of some embodiments of the present invention, there is provided a supply and demand matching method, comprising: a platform of a transaction block chain receives a demand message issued by a demand node and a supply message issued by a supply node of the transaction block chain; the platform generates an intelligent contract according to the demand message and the supply message, wherein the intelligent contract comprises a matching relation between demand nodes and supply nodes; the platform issues the intelligent contracts to the demand nodes and the supply nodes so that the demand nodes and the supply nodes execute the intelligent contracts; in response to the matched demand node and supply node confirming the transaction content according to the intelligent contract, the platform generates a contract script comprising the transaction content; the platform issues contract scripts to demand and supply nodes so that matching demand and supply nodes execute the contract scripts to fulfill transactions and record transaction information in a transaction blockchain.
In some embodiments, the platform matches the demand node and the supply node according to the attributes of the demand message, the supply message and the node, so that the sum of the interest values of the matching result is minimized, and generates an intelligent contract according to the matching result, wherein the interest values are in positive correlation with at least one of price, distance, response time and supply quantity of the supply node in the attributes of the node.
In some embodiments, the contract script includes digital signatures for matching demand nodes, supply nodes, and platforms, such that the matching demand nodes, supply nodes, and upon authenticating the digital signatures in the contract script, fulfill the transaction.
In some embodiments, the user information corresponding to the demand node and the supply node is stored in the user block chain.
In some embodiments, the user information corresponding to the demand node and the supply node is stored in a plurality of user block chains, and each user block chain stores different user information.
In some embodiments, the demand message includes a node identification of the demand node, and the provisioning message includes a node identification of the provisioning node; the supply and demand matching method further comprises the following steps: the platform queries blocks in a user block chain according to the node identification in the demand message or the supply message, and acquires user information corresponding to the node identification; and the platform sends the acquired user information to the node matched with the node corresponding to the node identification, so that the matched node fulfills the transaction according to the acquired user information.
In some embodiments, the intelligent contracts further include a breach penalty, such that matching demand and supply nodes are penalized in accordance with the intelligent contracts in response to the breach.
In some embodiments, the supply and demand matching method further comprises: the matched supply node performs first verification according to the public key address of the matched demand node and the public key in the demand message; in response to the first verification passing, the matched supply node sends a feedback message to the matched demand node, wherein the feedback message comprises transaction content; the matched demand node carries out second verification according to the public key address of the matched supply node; in response to the second verification passing, the matched demand node confirms the transaction content; and the matched demand node sends confirmation information to the platform.
According to a second aspect of some embodiments of the present invention, there is provided a supply and demand matching platform, comprising: the message receiving module is configured to receive demand messages issued by demand nodes and supply messages issued by supply nodes of the transaction block chain; the intelligent contract generating module is configured to generate an intelligent contract according to the demand message and the supply message, wherein the intelligent contract comprises a matching relation between demand nodes and supply nodes; the intelligent contract issuing module is configured to issue intelligent contracts to the demand nodes and the supply nodes so that the demand nodes and the supply nodes execute the intelligent contracts; a contract script generating module configured to generate a contract script including transaction contents in response to the matched demand node and supply node confirming the transaction contents according to the intelligent contract; a contract script issuing module configured to issue a contract script to the demand node and the supply node so that the matched demand node and supply node execute the contract script to fulfill the transaction and record the transaction information in the transaction block chain.
In some embodiments, the intelligent contract generating module is further configured to match the demand node and the supply node according to the attributes of the demand message, the supply message and the node, so that the sum of the equity values of the matching result is minimized, and generate the intelligent contract according to the matching result, wherein the equity value is positively correlated with at least one of price, distance, response time and supply amount of the supply node in the attribute of the node.
In some embodiments, the contract script includes digital signatures for matching demand nodes, supply nodes, and platforms, such that the matching demand nodes, supply nodes, and upon authenticating the digital signatures in the contract script, fulfill the transaction.
In some embodiments, the user information corresponding to the demand node and the supply node is stored in the user block chain.
In some embodiments, the user information corresponding to the demand node and the supply node is stored in a plurality of user block chains, and each user block chain stores different user information.
In some embodiments, the demand message includes a node identification of the demand node, and the provisioning message includes a node identification of the provisioning node; the supply and demand matching platform further comprises: the user information query module is configured to query blocks in a user block chain according to the node identifiers in the demand message or the supply message, and acquire user information corresponding to the node identifiers; and the user information sending module is configured to send the acquired user information to the node matched with the node corresponding to the node identification, so that the matched node fulfills the transaction according to the acquired user information.
In some embodiments, the intelligent contracts further include a breach penalty, such that matching demand and supply nodes are penalized in accordance with the intelligent contracts in response to the breach.
According to a third aspect of some embodiments of the present invention, there is provided a supply and demand matching system, comprising: any of the aforementioned supply and demand matching platforms, supply nodes, and demand nodes.
In some embodiments, the matched supply node is further configured to perform a first verification according to the public key address of the matched demand node and the public key in the demand message, and send a feedback message to the matched demand node in response to the first verification passing, wherein the feedback message includes the transaction content; the matched demand node is further configured to perform a second verification according to the public key address of the matched supply node, and in response to the second verification passing, confirm the transaction content and send confirmation information to the supply and demand matching platform.
According to a fourth aspect of some embodiments of the present invention, there is provided a supply and demand matching platform, comprising: a memory; and a processor coupled to the memory, the processor configured to perform any of the aforementioned supply and demand matching methods based on instructions stored in the memory.
According to a fifth aspect of some embodiments of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements any one of the supply and demand matching methods described above.
Some embodiments of the above invention have the following advantages or benefits: the supply and demand parties can complete the self-adaptive transaction process through the platform, the process is automatically controlled by the intelligent contract and the intelligent script, automatic and standard matching and confirmation are realized, the transaction information is stored in the block chain and is not easy to be tampered, and the safety and the reliability in the supply and demand matching process are improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an exemplary flow chart of a supply and demand matching method according to some embodiments of the invention.
FIG. 2 is an exemplary flow diagram of a method for intelligent contract generation according to some embodiments of the invention.
Fig. 3 is an exemplary flow diagram of a transaction authentication method according to some embodiments of the invention.
Fig. 4 is an exemplary flow diagram of a transaction process according to some embodiments of the invention.
FIG. 5 is an exemplary flow chart of a default penalty method according to some embodiments of the invention.
FIG. 6 is an exemplary flow chart of a user information query method according to some embodiments of the invention.
FIG. 7 is an exemplary block diagram of a supply and demand matching system according to some embodiments of the invention.
FIG. 8 is an exemplary block diagram of a supply and demand matching platform according to some embodiments of the invention.
FIG. 9 is an exemplary block diagram of a supply and demand matching platform according to further embodiments of the present invention.
FIG. 10 is an exemplary block diagram of a supply and demand matching platform according to further embodiments of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
After the analysis of the inventor, the block chain has the characteristics of openness and globality, so that the transaction activity can be ensured to be carried out at any time and place, and the limit of the traditional transaction on time and space is broken through. In addition, characteristics such as fairness and transaction transparency of the blockchain provide more transaction opportunities for the trader. The block chain technology can strengthen the product authentication and anti-counterfeiting management through a consistency and integrity verification mechanism in embedded data management, avoid the problem of commercial fraud, contribute to the whole-process tracking of the production, supply, circulation, sale and other links of the product, and enhance the transparency of supply chain supervision and the safety of transaction. For example, for important application scenes such as 'detection of food and drug quality and resource allocation', the confidence of consumers on the food and drug quality can be enhanced, the contradiction between supply and demand of products is balanced, the product layout is rationalized, the transaction efficiency is improved, and the market potential is excited under the transparent tracking supervision.
The invention adopts a transaction block chain to complete the recording of transaction information. In the invention, the supply node and the demand node in the system are block link points of a transaction block chain, and are used for recording transaction information in the transaction block chain. In addition, the system also comprises a platform which is used for assisting the supply node and the demand node to complete the transaction process. The platform is also a node in the transaction blockchain.
In some embodiments, the initialized transaction blockchain may be exemplarily represented using equation (1).
BC＝(Rrquirement,Supply,BCtran,IC,T) (1)
In equation (1), BC denotes an initialized blockchain system, Requirement denotes a resource demand set, Supply denotes a resource Supply set, IC denotes a blockchain contract which is an intelligent contract, and T ═ Requirement × Supply } denotes a cartesian set of product transactions.
FIG. 1 is an exemplary flow chart of a supply and demand matching method according to some embodiments of the invention. As shown in fig. 1, the supply and demand matching method of this embodiment includes steps S102 to S116.
In step S102, the demand node issues a demand message.
In some embodiments, the demand message may include node attributes of the demand node, and may also include a public key and a public key address of the demand node. The node attributes of the demand node may include, for example, one or more of an identity of the demand node, a resource demand amount, an address location, a demand initiation time, and the like.
An example of the demand message is shown in equation (2).
In the formula (2), ruaIs a resource demand node in a resource demand set. Ru is a messageaIs ruaThe need for the initiated resource(s) is,
is ruaA collection of messages to be published on a platform,
the internal parameter is ru in turnaRu id ofaResource demand raGeographic location laTi, the initiation timea。rua,publicRepresentation ruaRu is a public key of (1), addressaRepresentation ruaThe public key address of (c).
ruaCan pass the public key of the runaIs obtained by carrying out Hash operation on the private key of the user, ruaCan pass through the public key address of ruaThe public key of (2) is obtained by carrying out hash operation.
In step S104, the provisioning node issues a provisioning message.
In some embodiments, the provisioning message may include node attributes of the provisioning node, and may also include a public key and a public key address of the provisioning node. The node attributes of the provisioning node may include, for example, one or more of identity of the provisioning node, resource supply, resource price, address location, response time, parameter weight, and the like.
An example of the provisioning message is shown in equation (3).
In the formula (3), subIs a resource provisioning node in a resource provisioning set. Su, messagebIs subThe need for the initiated resource(s) is,
is subA collection of messages to be published on a platform,
the internal parameter is subSubResource supply amount sbResource price pbGeographic location lbResponse time trbAnd a weight W. sub,publicRepresentation subSu of (1), addressbRepresentation subThe public key address of (c).
subCan pass the public key of subIs obtained by carrying out Hash operation on the private key of the public key, subCan pass through the public key address of subThe public key of (2) is obtained by carrying out hash operation.
The supply node can query the information of the demand node through the platform, for example, the supply node can only query the information of the demand node which issues the demand message, so as to reduce the disclosure of the node privacy as much as possible.
The demand message and the supply message can be viewed only by the platform, or can be viewed by all nodes in the system, and can be selected by a person skilled in the art according to needs.
In step S106, the platform of the transaction block chain generates an intelligent contract according to the demand message and the supply message, where the intelligent contract includes a matching relationship between the demand node and the supply node. That is, the smart contracts are used for matching.
In some embodiments, the platform may perform adaptive transaction matching on all demand nodes based on information provided by each supply node, i.e., the matching process is performed automatically by the platform.
The intelligent contract may also include steps that instruct both the supplier and the supplier how to proceed with the next operation, such as in what manner to perform verification, confirmation, feedback, etc.
In step S108, the platform issues the smart contract to the demand node and the supply node.
The essence of an intelligent contract is a piece of program, such as readable computer code. The demand node and the supply node can run programs after receiving the intelligent contracts, and then can automatically confirm the matched nodes and automatically perform an authentication process.
In step S110, the matched demand node and supply node execute the intelligent contract and confirm the transaction content according to the intelligent contract. The transaction content may be, for example, specific content of a product provided by the supply node to the demand node, and may further include other transaction details, which are not described herein again.
In step S112, the platform generates a contract script that includes the transaction content. The contract script is used for authentication and transaction. The nature of the contract script is also a program.
In step S114, the platform issues the contract script to the demand node and the supply node. For example, the platform may broadcast the contract script in the system, or store the contract script in a storage location that is readable by all nodes in the system.
In step S116, the matched demand and supply nodes execute the contract script to fulfill the transaction and record the transaction information in the transaction blockchain.
By the method of the embodiment, the supply and demand parties can complete the self-adaptive transaction process through the platform, the process is automatically controlled by the intelligent contract and the intelligent script, automatic and standard matching and confirmation are realized, the transaction information is stored in the block chain and is not easy to be tampered, and the safety and the reliability in the supply and demand matching process are improved.
An embodiment of the invention for generating an intelligent contract is described below with reference to FIG. 2.
FIG. 2 is an exemplary flow diagram of a method for intelligent contract generation according to some embodiments of the invention. As shown in fig. 2, the intelligent contract generating method of this embodiment includes steps S202 to S204.
In step S202, the platform matches the demand node and the supply node according to the attributes of the demand message, the supply message, and the node, so that the sum of the rights and interests of the matching result is minimized. The equity value is positively correlated with at least one of price, distance, response time, and supply amount of the supply node among the attributes of the node. The sum of the right values of the matching results can be the sum of the right values of all the matching results, or the sum of the right values of the preset partial matching results.
There may be multiple demand nodes in the system, so that multiple sets of supply and demand relationships, i.e. multiple sets of matching results, are obtained by matching. The purpose of the platform to do the above processing is to minimize the sum of the right and interest values in the system, so that the optimal matching result can be obtained, and the resource allocation in the whole system reaches an equilibrium state.
In some embodiments, the matching result may be determined according to equation (4).
min(∑bsb·pb·D·trb·w) (4)
In equation (1), b denotes the identity of the supplying node, pbRepresenting the supply price of the supply node b, D representing the distance between the supply node b and the matching demand node, trbRepresenting the response time of the supplying node b and W representing the weight. The products of the above parameters for each provisioning node are summed to obtain the equity value. And when the interest value is minimized, the corresponding matching result is the optimal matching result.
In step S204, the platform generates an intelligent contract according to the matching result, i.e., the intelligent contract includes the matching result with the minimized equity value.
In some embodiments, the private key of the platform may be further used to encrypt the intelligent contract, so that the provisioning node and the demand node, after receiving the intelligent contract, use the pre-obtained platform public key to perform decryption, and verify whether the intelligent contract is issued by the platform.
By the method of the embodiment, the matching accuracy can be improved, the maintenance cost is reduced, and the overall benefit of the system is improved. Thereby further attracting more supply and demand nodes to carry out transactions in the system.
After the intelligent contract is generated, the matched supply and demand parties can carry out verification and transaction confirmation according to the intelligent contract. In some embodiments, the demand message includes node attributes, a public key and a public key address of the demand node, and the provisioning message includes node attributes, a public key and a public key address of the provisioning node, so that the matching demand node and provisioning node can mutually authenticate. An embodiment of the transaction authentication of the present invention is described below with reference to fig. 3.
Fig. 3 is an exemplary flow diagram of a transaction authentication method according to some embodiments of the invention. As shown in fig. 3, the transaction authentication method of this embodiment includes steps S302 to S310.
In step S302, the matching supply node performs a first verification according to the public key address of the matching demand node and the public key in the demand message.
If the demand message is readable by all nodes, the matching provisioning node can directly obtain the public key and the public key address therein. If the demand message is only readable by the platform, the platform may attach the public key and the public key address in the demand message to the smart contract for transmission, or transmit the public key and the public key address separately to the matching provisioning node. Those skilled in the art can also select a specific public key and a specific public key address obtaining manner as needed, which is not described herein again.
In some embodiments, the matching provisioning node may perform the first verification by comparing whether a public key obtained from the public key address of the matching demand node is consistent with a public key in the demand message issued by the matching demand node.
In step S304, in response to the first verification passing, the matched supply node sends a feedback message to the matched demand node, wherein the feedback message includes the transaction content. The feedback message may also include a signature and provisioning address of the provisioning node, etc., as desired.
An example of a feedback message may be as shown in equation (5).
In the formula (5), subIndicating a matching supply node, ruaRepresenting the matched demand nodes; su of respondbRepresentation node subThe feedback message of (2); cabRepresents transaction content, which may include ru, for exampleaRu node id ofa、subSubResource supply amount sbResource price pbNode subAnd ruaDistance D, response time trbWeight W; su of signatureb,privateRepresentation node subBy the node subPrivate key su ofb,privateEncrypting; su, addressbRepresentation node subThe public key address of (a); the feedback message is sent by node ruaPublic key rua,publicAnd (4) encrypting. The specific content in the feedback message can be adjusted as needed by those skilled in the art.
In step S306, the matched demand node performs a second verification according to the public key address of the matched supply node.
For example, if the feedback message includes the signature of the matched supply node, the matched demand node may obtain the public key of the matched supply node through the obtained public key address, and then decrypt the signature of the matched supply node by using the public key of the supply node to perform the second verification; for another example, the matching demand node may perform the second verification by comparing whether the public key obtained from the public key address of the matching supply node is consistent with the public key in the supply message issued by the matching supply node. One skilled in the art may select one or more ways to perform the second verification.
In some embodiments, if the feedback message is encrypted with the public key of the matching demand node, the matching demand node may also decrypt the feedback message with its own private key in advance.
In step S308, in response to the second verification passing, the matched demand node confirms the transaction content. For example, it can be determined whether the transaction content is the content required by the user.
In step S310, the matched demand node sends a confirmation message to the platform.
In some embodiments, the matching demand node may attach its own signature to the validation message, and may also attach the signature of the matching supply node.
The above process is automated by the provisioning node and the demand node executing an intelligent contract. By the method of the embodiment, the supplier and the demander can carry out the transaction after the identity of the counterparty is verified, so that the security and the reliability of the transaction are further improved.
After the supply and demand parties agree on the transaction content, the platform generates a contract script. In some embodiments, the contract script may include digital signatures for matching demand nodes, supply nodes, and platforms such that the matching demand nodes, supply nodes, and supply nodes fulfill transactions upon authentication of the digital signatures in the contract script. An embodiment of the transaction process of the present invention is described below with reference to fig. 4.
Fig. 4 is an exemplary flow diagram of a transaction process according to some embodiments of the invention. As shown in fig. 4, the transaction process of this embodiment includes steps S402 to S408.
In step S402, the platform generates a contract script including the digital signatures of the matched demand node, supply node and platform and the transaction content in response to the matched demand node and supply node confirming the transaction content.
An example of a contract script may be shown in equation (6).
Script＝[Nversion||Ntime||Signature.rua·Signature.sub·
Signature.BC(Cab)] (6)
In the formula (5), NversionIs a transaction serial number; n is a radical oftimeTime to reach for the transaction; ru is signaturea、Signature.subBC are the demand nodes ruaSupply node subAnd a digital signature of the platform; cabIs the transaction content.
The digital signature may be, for example, sent by the provisioning node or the demand node to the platform upon confirmation of the transaction. Those skilled in the art may also use other ways to enable the platform to obtain the digital signatures of the supply node and the demand node, as desired. The digital signature may be obtained by, for example, extracting a digest of information such as transaction contents in the contract script and encrypting the digest.
In step S404, the platform issues contract scripts to the demand node and the supply node.
In step S406, the matching demand node and supply node authenticate the digital signature in the contract script.
In step S408, in response to the authentication of the digital signature passing, the matching demand node, supply node fulfill the transaction and record the transaction information in the transaction blockchain. The transaction information may include, for example, a transaction process and a transaction result. The matched demand node and supply node can record all transaction information in the same block at one time, and can also record the transaction information in batches along with the transaction, so that the tracking, confirmation and supervision of the execution condition of each link of the transaction are realized.
In some embodiments, a merkel tree (Merkle tree) structure may be employed to record and store transaction process data, which may include, for example, commodity transaction details, blockchain billing values, timestamps, and the like; the structure of Merkel Patricia tree may be used to record and store transaction result data, which may include, for example, product quality tracking, credit scoring, accounting settlement maintenance, etc. The Mercker tree is a binary tree structure, a compressed cryptology abstract, namely a hash value of a block is generated for all transaction records in the block, and the hash value can detect the change of any transaction record; the essence of the Kerr-Patriori tree structure is an encryption authentication data structure, which can be used for storing all key-value pairs, can ensure the authenticity and integrity of transaction results, and can inquire and trace the transaction results through the key values, thereby providing an environment-friendly interface for service expansion.
By the method of the embodiment, the contract script can be ensured to comprise the transaction information confirmed by the supply and demand parties, so that the supply and demand parties can fulfill the transaction according to the contract script, and the safety and reliability of supply and demand matching and transaction are improved.
If the supply node or the demand node generates default behaviors in the transaction process, the platform can also punish according to the intelligent contract. An embodiment of the inventive penalty method is described below with reference to FIG. 5.
FIG. 5 is an exemplary flow chart of a default penalty method according to some embodiments of the invention. The intelligent contracts in this embodiment also include penalty violations. As shown in FIG. 5, the default penalty method of this embodiment includes steps S502-S504.
In step S502, the provisioning node or the demand node executes the intelligent contract.
An example of the penalty of a demand node in an intelligent contract is shown in equation (7).
Run in equation (7), pushaRepresentation requirement node ruaIs given as ruaPayment is required in the transaction; c is ruaCurrent credit of; wnIs ruaThe default weight coefficient can be set with different weights according to the default degree. The default punishment can adopt a private key BC of the platformprivateEncrypted and issued. The demand node and the supply node may obtain the public key of the platform in advance to decrypt the obtained encrypted data.
In step S504, in response to the supply node or the demand node performing default behavior during the transaction, punishment is performed according to the intelligent contract. The penalty results may then optionally be reported to the platform for supervision and recording by the platform.
By the method of the embodiment, the default node can be punished automatically, and the reliability of the transaction is further improved.
The systems employed by the present invention may also be implemented in a double-stranded architecture in some embodiments. In addition to the transaction blockchains described in the previous embodiments, the system may also include a user blockchain. The platform is located in both the transaction blockchain and the user blockchain. The transaction block chain is responsible for creating a transaction block and executing a transaction, is a place for carrying out transaction and settlement by both parties, and does not need to store user information of both parties of the transaction; the user block chain, namely the sub-chain, is responsible for establishing the user block on the platform and storing the user account information, is a place for inquiring the user information and does not relate to related transactions. Because the user information of both transaction parties is stored independently by the user block chain and is completely isolated from the transaction block chain, and the related user information is only shared in the user sub-chain to which the user belongs and is protected by the hash function, the mechanism can provide higher privacy and security protection for both transaction parties.
The user block chain aims to ensure the authenticity, integrity and privacy of the information of the transaction participants, the information can be stored by adopting a Mercker tree structure, and the unique hash value of the Mercker tree can meet the requirement of the user chain on data security. The information stored by the user blockchain includes, for example, an identity, a key, a credit rating, etc. of the registered user.
The user block chain may have only one or may include a plurality of user block chains. When the number of the user block chains is multiple, different user block chains can be maintained by different devices, for example, by multiple groups of different devices on the platform side, each user block chain has different user data, and the possibility of large-scale privacy disclosure is further reduced. The user block chain provided by the embodiment of the invention can also have an expandable mechanism. When the number of users is large, the original user block chain can be decomposed into a plurality of user block chains, and the user block chains can be operated in parallel, so that the total load of the system can be balanced, and the calculation delay is low.
When the matched node needs to know part or all of the user information of the other party, the matched node can be queried and informed by the platform under the condition of meeting the preset safety condition or query condition, so that the diffusion of the user information can be reduced as much as possible. An embodiment of the user information query method of the present invention is described below with reference to fig. 6.
FIG. 6 is an exemplary flow chart of a user information query method according to some embodiments of the invention. As shown in fig. 6, the user information query method of this embodiment includes steps S602 to S604.
In step S602, the platform queries a block in the user block chain according to the node identifier in the demand message or the supply message, and obtains user information corresponding to the node identifier.
In step S604, the platform sends the acquired user information to the node that sent the query request so that the matching node fulfills the transaction according to the acquired user information. The user information sent by the platform may be partial information or complete information. For example, the platform may send only address information closely related to the transaction to the matching node.
By the method of the embodiment, the transaction information and the user information can be stored separately, and the nodes can inquire and send the user information when needing the user information, so that the privacy information of the user can be prevented from being leaked as much as possible, and the transaction safety is improved.
An embodiment of the supply and demand matching system of the present invention is described below with reference to fig. 7.
FIG. 7 is an exemplary block diagram of a supply and demand matching system according to some embodiments of the invention. As shown in fig. 7, the supply and demand matching system 70 of this embodiment includes a supply and demand matching platform 710, a supply node 720, and a demand node 730. The supply node 720 and the demand node 730 may be provided as one or more as needed, only one of which is illustrated in fig. 7 by way of example.
An embodiment of the supply and demand matching platform of the present invention is described below with reference to fig. 8.
FIG. 8 is an exemplary block diagram of a supply and demand matching platform according to some embodiments of the invention. As shown in fig. 8, the supply and demand matching platform 800 of this embodiment includes: a message receiving module 8010 configured to receive demand messages issued by demand nodes and supply messages issued by supply nodes of a transaction block chain; an intelligent contract generating module 8020 configured to generate an intelligent contract according to the demand message and the supply message, wherein the intelligent contract includes a matching relationship between the demand node and the supply node; an intelligent contract issuing module 8030 configured to issue an intelligent contract to the demand node and the supply node so that the demand node and the supply node execute the intelligent contract; a contract script generation module 8040 configured to generate a contract script including transaction contents in response to the matched demand node and supply node confirming the transaction contents according to the intelligent contract; a contract script issuing module 8050 configured to issue contract scripts to demand nodes and supply nodes so that matching demand nodes and supply nodes execute the contract scripts to fulfill transactions and record transaction information in a transaction blockchain.
In some embodiments, the intelligent contract generating module 8020 may be further configured to match the demand node and the supply node according to the attributes of the demand message, the supply message, and the node so that the sum of the equity values of the matching results is minimized, and generate the intelligent contract according to the matching results, the equity value being in positive correlation with at least one of the price, the distance, the response time, and the supply amount of the supply node in the attribute of the node.
In some embodiments, the contract script may include digital signatures for matching demand nodes, supply nodes, and platforms such that the matching demand nodes, supply nodes, and supply nodes fulfill transactions upon authentication of the digital signatures in the contract script.
In some embodiments, the user information corresponding to the demand node and the supply node may be stored in the user block chain.
In some embodiments, the user information corresponding to the demand node and the supply node may be stored in a plurality of user block chains, and each user block chain stores different user information.
In some embodiments, the demand message may include a node identification of the demand node, and the provisioning message may include a node identification of the provisioning node; the supply and demand matching platform 800 may further include: a user information query module 8060 configured to query a block in a user block chain according to a node identifier in a demand message or a supply message, and obtain user information corresponding to the node identifier; a user information sending module 8070 configured to send the obtained user information to the node matched with the node corresponding to the node identification, so that the matched node fulfills the transaction according to the obtained user information.
In some embodiments, the intelligent contracts may also include default penalties, such that matching demand and supply nodes are penalized in accordance with the intelligent contracts in response to the occurrence of default behavior.
In the supply and demand matching system shown in fig. 7, the matched supply node 720 may be further configured to perform a first verification according to the public key address of the matched demand node 730 and the public key in the demand message, and send a feedback message to the matched demand node 730 in response to the first verification passing, where the feedback message includes the transaction content; the matching demand node 730 may be further configured to perform a second verification based on the public key address of the matching supply node 720, and in response to the second verification passing, validate the transaction content and send validation information to the supply and demand matching platform 710.
FIG. 9 is an exemplary block diagram of a supply and demand matching platform according to further embodiments of the present invention. As shown in fig. 9, the supply and demand matching platform 900 of this embodiment includes: a memory 910 and a processor 920 coupled to the memory 910, wherein the processor 920 is configured to execute a supply and demand matching method in any of the embodiments based on instructions stored in the memory 910.
FIG. 10 is an exemplary block diagram of a supply and demand matching platform according to further embodiments of the invention. As shown in fig. 10, the supply and demand matching platform 1000 of this embodiment includes: the memory 1010 and the processor 1020 may further include an input/output interface 1030, a network interface 1040, a storage interface 1050, and the like. These interfaces 1030, 1040, 1050 and the memory 1010 and the processor 1020 may be connected via a bus 1060, for example. The input/output interface 1030 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. Network interface 1040 provides a connection interface for various networking devices. The storage interface 1050 provides a connection interface for external storage devices such as an SD card and a usb disk.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, wherein the program is configured to implement any one of the supply and demand matching methods when executed by a processor.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (19)
1. A supply and demand matching method comprising:
a platform of a transaction block chain receives a demand message issued by a demand node and a supply message issued by a supply node of the transaction block chain;
the platform generates an intelligent contract according to the demand message and the supply message, wherein the intelligent contract comprises a matching relation between demand nodes and supply nodes;
the platform issues the intelligent contract to the demand node and the supply node so that the demand node and the supply node execute the intelligent contract and automatically confirm the matched nodes;
in response to the matched demand node and supply node confirming the transaction content according to the intelligent contract, the platform generates a contract script comprising the transaction content;
the platform issues the contract script to the demand node and the supply node so that the matching demand node and supply node execute the contract script to fulfill the transaction and record the transaction information in the transaction blockchain.
2. The supply and demand matching method according to claim 1, wherein the platform matches demand nodes and supply nodes according to the attributes of the demand messages, the supply messages and the nodes so that the sum of the equity values of the matching results is minimized, and generates an intelligent contract according to the matching results, wherein the equity values are positively correlated with at least one of prices, distances, response times and supply amounts of the supply nodes in the attributes of the nodes.
3. The supply and demand matching method according to claim 1 wherein the contract script includes digital signatures of matching demand nodes, supply nodes and platforms such that the matching demand nodes, supply nodes fulfill transactions upon authentication of the digital signatures in the contract script.
4. The supply and demand matching method according to claim 1, wherein the user information corresponding to the demand node and the supply node is stored in a user block chain.
5. The supply and demand matching method according to claim 4, wherein the user information corresponding to the demand node and the supply node is stored in a plurality of user block chains, and each user block chain stores different user information.
6. The supply and demand matching method according to claim 4 wherein the demand message includes a node identification of a demand node and the supply message includes a node identification of a supply node;
the supply and demand matching method further comprises the following steps:
the platform queries blocks in a user block chain according to the node identification in the demand message or the supply message, and acquires user information corresponding to the node identification;
and the platform sends the acquired user information to the node matched with the node corresponding to the node identification, so that the matched node fulfills the transaction according to the acquired user information.
7. The supply and demand matching method according to claim 1 wherein the intelligent contracts further include penalty penalties such that matched demand and supply nodes are penalized in accordance with the intelligent contracts in response to the occurrence of a breach.
8. The supply and demand matching method according to claim 1, further comprising:
the matched supply node performs first verification according to the public key address of the matched demand node and the public key in the demand message;
in response to the first verification passing, the matched supply node sends a feedback message to the matched demand node, wherein the feedback message comprises transaction content;
the matched demand node carries out second verification according to the public key address of the matched supply node;
in response to the second verification passing, the matched demand node confirms the transaction content;
and the matched demand node sends confirmation information to the platform.
9. A supply and demand matching platform comprising:
the message receiving module is configured to receive demand messages issued by demand nodes and supply messages issued by supply nodes of the transaction block chain;
the intelligent contract generating module is configured to generate an intelligent contract according to the demand message and the supply message, wherein the intelligent contract comprises a matching relation between demand nodes and supply nodes;
the intelligent contract issuing module is configured to issue the intelligent contracts to the demand nodes and the supply nodes so that the demand nodes and the supply nodes execute the intelligent contracts and automatically confirm the matched nodes;
a contract script generating module configured to generate a contract script including transaction contents in response to the matched demand node and supply node confirming the transaction contents according to the intelligent contract;
a contract script issuing module configured to issue the contract script to the demand node and the supply node so that the matched demand node and supply node execute the contract script to fulfill the transaction and record the transaction information in the transaction block chain.
10. The supply and demand matching platform according to claim 9, wherein the intelligent contract generating module is further configured to match demand nodes and supply nodes according to the attributes of the demand messages, the supply messages and the nodes so that the sum of the equity values of the matching results is minimized, and generate an intelligent contract according to the matching results, wherein the equity values are in positive correlation with at least one of price, distance, response time and supply amount of the supply nodes in the attributes of the nodes.
11. The supply and demand matching platform of claim 9 wherein the contract script includes digital signatures for matching demand nodes, supply nodes and platform such that the matching demand nodes, supply nodes fulfill transactions upon authentication of the digital signatures in the contract script.
12. The supply and demand matching platform according to claim 9 wherein the user information corresponding to demand nodes and supply nodes is stored in a user block chain.
13. The supply and demand matching platform according to claim 12, wherein the user information corresponding to the demand nodes and the supply nodes is stored in a plurality of user blockchains, and each user blockchain stores different user information.
14. The supply and demand matching platform according to claim 12 wherein the demand message includes a node identification of a demand node and the supply message includes a node identification of a supply node;
the supply and demand matching platform further comprises:
the user information query module is configured to query blocks in a user block chain according to the node identifiers in the demand message or the supply message, and acquire user information corresponding to the node identifiers;
and the user information sending module is configured to send the obtained user information to the node matched with the node corresponding to the node identification, so that the matched node fulfills the transaction according to the obtained user information.
15. The supply and demand matching platform according to claim 9 wherein the intelligent contracts further include penalty penalties such that matched demand and supply nodes are penalized in accordance with the intelligent contracts in response to the occurrence of a breach.
16. A supply and demand matching system comprising:
the supply and demand matching platform of any one of claims 9 to 15,
a supply node, and
a demand node.
17. The supply and demand matching system of claim 16 wherein,
the matched supply node is further configured to perform first verification according to the public key address of the matched demand node and the public key in the demand message, and send a feedback message to the matched demand node in response to the first verification passing, wherein the feedback message comprises transaction content;
the matched demand node is further configured to perform a second verification according to the public key address of the matched supply node, and in response to the second verification passing, confirm the transaction content and send confirmation information to the supply and demand matching platform.
18. A supply and demand matching platform comprising:
a memory; and
a processor coupled to the memory, the processor configured to execute the supply and demand matching method of any of claims 1-8 based on instructions stored in the memory.
19. A computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the supply and demand matching method of any one of claims 1 to 8.
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