CN111091465B - Block chain-based bond underwriting group member information verification method and device - Google Patents
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Abstract
The invention discloses a block chain-based bond underwriting group member information verification method and a device, wherein the method comprises the following steps: acquiring information of one or more contractors of the currently-purchased target bond; searching the information of the bearing group of the target bond stored on the blockchain system, wherein the information of the bearing group of the target bond comprises the following steps: member information of each underwriting group member in the underwriting group of the target bond; verifying whether each underwriter of the currently-applied target bond is a underwriter member of the target bond based on underwriter information of each underwriter of the currently-applied target bond and member information of each underwriter member of the underwriter group of the target bond. The invention stores the group information of the bond based on the blockchain system, not only ensures that the group information of the bond is non-tamper-proof, but also can ensure that the bond system automatically identifies whether the currently-purchased bond is a group member of the bond, thereby avoiding a great deal of manual operation and improving the bond purchasing efficiency.
Description
Technical Field
The invention relates to the technical field of blockchains, in particular to a method and a device for verifying bond underwriting group member information based on blockchains.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
The bond is a bond in which a debt such as a government, an enterprise, a bank or the like raised funds by a person, and the bond is issued according to legal programs and promises to the creditor to pay the money on a specified date. Participants in the bond market mainly include: three of a distributor, a contractor and a direct investor; where a issuer refers to a principal (e.g., country, government, or bank) who issues a bond and assumes the liability of the bond to be redeemed; the underwriter refers to a body (e.g., a large commercial bank, securities corporation, etc.) that helps the issuer to complete bond issuance, subscription, and distribution to other settlement members; direct investors refer to subjects (e.g., banks, funds, insurance, dealer, etc.) who can participate in previous bids and claims.
For particularly large volumes of securities issued at a time, a underwriter often does not want to take on the issuing risk alone, and a underwriter is organized. In the existing bond system, the groups of bonds are established by means of off-line signing, namely, each contractor signs a group agreement, and group authentication is achieved after authentication is validated. When each underwriter purchases a bond through the bond system, it is necessary to identify whether each underwriter is a member of the underwriter group for that bond.
Currently, in the prior art, whether each underwriter is a underwriter member of the bond is identified mainly by the following two ways: ① Manually identifying whether each underwriter is a underwriter member of the bond; ② The information of the bearing group of the bond is input into the bond system in advance, and whether the bearing group member of the bond is automatically identified by the bond system. Therefore, the two modes involve a great deal of manual work, and have the problems of low efficiency and high cost. In addition, the information of the underwriting group of the bond system is manually input, and the problem that the data is tampered is difficult to avoid only for the system operator.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a block chain-based bond underwriting group member information verification method, which is used for solving the technical problem that a great deal of manual operations are involved when an existing bond system verifies whether a underwriter of a currently purchased bond is an underwriting group member of the bond, and comprises the following steps: acquiring information of one or more contractors of the currently-purchased target bond; searching the information of the bearing group of the target bond stored on the blockchain system, wherein the information of the bearing group of the target bond comprises the following steps: member information of each underwriting group member in the underwriting group of the target bond; verifying whether each underwriter of the currently-applied target bond is a underwriter member of the target bond based on underwriter information of each underwriter of the currently-applied target bond and member information of each underwriter member of the underwriter group of the target bond.
The embodiment of the invention also provides a device for verifying the information of the debt group members based on the blockchain, which is used for solving the technical problem that a great deal of manual operations are involved when the prior debt system verifies whether the currently-applied debt contractor is the debt group member, and comprises the following steps: the information acquisition module is used for acquiring the information of one or more contractors of the currently-purchased target bond; the blockchain searching module is used for searching the information of the underwriting group of the target bond stored on the blockchain system, wherein the information of the underwriting group of the target bond comprises the following components: member information of each underwriting group member in the underwriting group of the target bond; and the information verification module is used for verifying whether each underwriter of the current target bond is an underwriter member of the target bond according to the underwriter information of each underwriter of the current target bond and the member information of each underwriter member in the underwriter group of the target bond.
The embodiment of the invention also provides a computer device which is used for solving the technical problem that a large amount of manual operations are involved in the verification of whether the underwriter of the currently purchased bond is a underwriter member of the bond in the existing bond system.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problem that a great deal of manual operations are involved in verifying whether a underwriter of a currently-purchased bond is a underwriter member of the bond in the existing bond system, wherein the computer readable storage medium stores a computer program for executing the block chain-based bond underwriter member information verification method.
In the embodiment of the invention, when the bond buying operation of each underwriter is detected, acquiring the underwriter information of one or more underwriters of the currently-purchased target bond, and searching the underwriter group information of the target bond stored on the blockchain system, wherein the underwriter group information stored on the cross-regional chain system contains the member information of each underwriter group member in the underwriter group of the target bond, so that whether each underwriter of the currently-purchased target bond is an underwriter group member of the target bond can be verified according to the underwriter information of each underwriter of the currently-purchased target bond and the member information of each underwriter group member in the underwriter group of the target bond.
According to the embodiment of the invention, the block chain system is based on the block chain system to store the information of the bearing group of the bond, so that the information of the bearing group of the bond is not tamper-proof, and the bond system can automatically identify whether the currently-purchased bond bearing person is a member of the bearing group of the bond, thereby avoiding a great deal of manual operation and improving the bond purchasing efficiency.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a flowchart of a method for verifying member information of a blockchain-based bond underwriting group in an embodiment of the present invention;
FIG. 2 is a flowchart of a underwriter registration process provided in an embodiment of the present invention;
FIG. 3 is a flow chart of a set-up of a underwriting group provided in an embodiment of the present invention;
FIG. 4 is a flowchart of online contractual agreements of a contractor provided in an embodiment of the present invention;
Fig. 5 is a schematic diagram of a device for verifying member information of a bond bearing group based on blockchain in an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention.
In the description of the present specification, the terms "comprising," "including," "having," "containing," and the like are open-ended terms, meaning including, but not limited to. The description of the reference terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The order of steps involved in the embodiments is illustrative of the practice of the application, and is not limited and may be suitably modified as desired.
The embodiment of the invention provides a block chain-based method for verifying member information of a bond bearing group, which can be applied to, but is not limited to, a bond system.
Fig. 1 is a flowchart of a method for verifying member information of a bond bearing group based on blockchain, which is provided in an embodiment of the present invention, and as shown in fig. 1, the method may include the following steps:
S101, acquiring information of one or more contractors of the currently-applied target bond.
It should be noted that, in the embodiment of the present invention, the target bond may be a bond commonly issued by a plurality of underwriters, and generally refers to a particularly large amount of securities, such as national bonds or bulk stocks. Because of the particularly large volume of securities issued, one underwriter is typically reluctant to take on the risk of issuing, and thus, one underwriter group is organized for common underwriting of issues by multiple underwriters, resulting in a reduced risk of each underwriter being individually underwritten.
It should be noted that S101 may be a step triggered by the bond system when detecting that the service system of any one of the contractors performs a bond applying operation through the bond system, and since the bond system needs to verify whether the contractor currently applying the bond is a member of the bond applying group when applying the bond, if the bond applying operation of one or more contractors is detected at the time of bond issuing, the contractor information of each contractor currently applying the bond may be acquired through S101, alternatively, the contractor information may include, but is not under, the name of the contractor.
S102, searching the information of the underwriting group of the target bond stored on the blockchain system, wherein the information of the underwriting group of the target bond comprises the following steps: member information of each of the underwriter members in the underwriter of the target bond.
It should be noted that the member information of each underwriter group member may include, but is not limited to, identification information of each underwriter group member, for example, a underwriter name of an underwriter who is the underwriter group member.
It should be noted that the blockchain system in the embodiment of the present invention may be a blockchain system that is built independently of each underwriter, or may be a blockchain system that is built by each underwriter as a blockchain node; if the data is the former, each underwriter can access the blockchain system to acquire the data stored in the blockchain system; if the latter, the data on the blockchain system is shared across the various underwriter nodes. According to the embodiment of the invention, the information of the bearing group of the target bond is stored on the blockchain system in advance, and the data on the blockchain system has non-tamper property, so that the risk of tampering of the information of the bearing group can be prevented by storing the information of the bearing group of the target bond in the blockchain system.
As an alternative implementation, the information of the underwriting group of the target bond may be stored on the blockchain system in the form of key value pairs, wherein the key is the identification information of the target bond and the value is the member information of each underwriting member. Thus, based on the identification information of the target bond, the member information of all the underwriter group members in the underwriter group of the target bond can be searched from the blockchain system.
Optionally, when a block chain system is used to build a group of a bond, the embodiment of the present invention may implement online signing of each contractor, and store the group information of the bond to the block chain system through online signing, so before searching the group information of the target bond stored on the block chain system, the method for verifying member information of the group member of the bond based on the block chain may further include the following steps: and constructing a bearing group of the target bond, and generating bearing group information of the target bond, wherein the bearing group of the target bond comprises the following components: one or more underwriters; and storing the information of the underwriting group of the target bond to the blockchain system.
Wherein, when the target bond is established and the information of the target bond is generated, the method can be realized by the following steps: acquiring one or more selected underwriters, and sending a construction request to each selected underwriter through the blockchain system, wherein the construction request is used for constructing an underwriter group of the target bond; receiving response results returned by each underwriter through the blockchain system, wherein the response results comprise: a first response result and a second response result, wherein the first response result represents that each underwriter agrees to the underwriter group joining the target bond, and the second response result represents that each underwriter refuses to join the underwriter group joining the target bond; when the response results returned by all underwriters are the first response results, constructing an underwriting group of the target bond, and generating underwriting group information of the target bond; and when the response results returned by the contractors are not all the first response results, acquiring one or more reselected contractors, and sending a construction request to the selected contractors through the blockchain system.
Optionally, after the target bond's underwriting group is built and the target bond's underwriting group information is generated, the blockchain-based bond underwriting group member information verification method provided by the embodiment of the invention may further include the following steps: generating a construction notification message of the target bond; the construction notification message of the target bond is transmitted to each underwriter through the blockchain system.
As an alternative embodiment, the underwriting group information of the target bond may be stored to the blockchain system by: acquiring CA certificates of all underwriters in the underwriter group information of the target bond; verifying the CA certificates of all underwriters; and storing the underwriting group information of the target bond to the blockchain system in the form of key value pairs under the condition that the CA certificate of each underwriter passes verification, wherein the key is identification information of the target bond, and the value is member information of each underwriting member.
Optionally, the CA certificates of the respective underwriters in the underwriter group information of the target bond are acquired by: receiving registration requests of all underwriters, wherein the registration requests contain underwriter information of all underwriters; according to the registration request of each underwriter, transmitting the underwriter information of each underwriter to a CA server; the receiving CA server returns CA certificates to the respective underwriters.
S103, verifying whether each underwriter of the current target bond is a underwriter member of the target bond according to the underwriter information of each underwriter of the current target bond and the member information of each underwriter member of the target bond.
It should be noted that, in the embodiment of the present invention, the member information of each underwriting group member in the underwriting group of the target bond is stored in advance in the blockchain system, so after acquiring the underwriting information of each underwriting person of the current target bond, it is possible to verify whether each underwriting person of the current target bond is an underwriting group member of the target bond according to the member information of each underwriting group member stored in the blockchain system.
As can be seen from the foregoing, according to the method for verifying the member information of the debt group based on the blockchain, when the operation of buying the debt by each underwriter is detected, the underwriter information of one or more underwriters of the currently-purchased target debt is obtained, and the underwriter information of the target debt stored in the blockchain is searched.
According to the block chain-based bond group member information verification method provided by the embodiment of the invention, the block chain-based system stores the group information of the bonds, so that the group information of the bonds is non-tamper-resistant, the bond system can automatically identify whether the currently-applied bond is a group member of the bonds, a large number of manual operations are avoided, and the bond purchasing efficiency is improved.
According to the blockchain-based bond acceptance group member information verification method provided by the embodiment of the invention, as an optional implementation manner, the embodiment of the invention can build and develop an application system comprising an underwriter registration module, an underwriter group building module, an underwriter subscription module, a bond purchase module and a blockchain module based on a Spring Boot frame, and the application system can exist independently of the existing bond system or can be used as a part of the existing bond system. The following describes each module separately:
① The underwriter registration module is used for registering information of each underwriter, and the registered information comprises but is not limited to: information such as underwriter ID, role type (including but not limited to underwriter administrator, underwriter release bookkeeping operator or underwriter project underwriter operator, etc.), uniform social credit code, underwriter name, contact or address; certificates may be applied to the CA server using the underwriter ID and underwriter name, and the certificate returned by the CA server may be saved to a file system (file server). When registering, the underwriter applies for the CA certificate according to the information such as the underwriter name, underwriter ID and the like, after the CA server identifies the identity of the applicant, a public key is distributed to the applicant, the public key and the identity information of the applicant are bound together, and after signing, a certificate is formed and returned to the applicant.
Fig. 2 is a flowchart of registration of a underwriter, where, as shown in fig. 2, the underwriter ID and underwriter name that uniquely identify each underwriter are sent to a CA server, and the CA server assigns a public key to each underwriter, binds the public key to the identity information of each underwriter to generate a certificate, and returns.
② And the bearing group construction module is used for constructing bearing groups of bonds. Before the bond begins to be purchased, a bookkeeping manager is required to select a carrier in the system to complete the operations of building the carrier group. And the underwriting group building module finds CA certificates corresponding to all underwriting operators according to all selected underwriting operators, and invokes the block chain access layer to finish the information uplink of the underwriting group. The uplink time zone blockchain system performs validity verification on the CA certificates of the respective underwriters, and after the verification is passed, the underwriter group information is pushed to the blockchain system for storage in a key-value mode (for example, a key with a bond ID as a key value pair and a value with an underwriter name as a key value pair). Optionally, after the bookkeeping manager completes the underwriter group organization, the system can automatically notify the underwriter group members after submitting and notifying the underwriter. Fig. 3 is a flowchart of a underwriting group construction provided in an embodiment of the present invention, as shown in fig. 3, after receiving an underwriting group construction request, verifying CA certificates of each underwriting group requesting to be constructed, and after verification is passed, storing member information of each underwriting group member through a blockchain system.
Since the CA certificate applies, the CA server assigns a public key to the applicant (underwriter) and binds the public key with the identity information of the applicant to form a certificate. If the authenticity of a certificate is to be verified, the public key in the certificate is used for verifying the certificate, and error information is returned when the verification fails.
③ And the contractor signing module is used for realizing online signing by each contractor. After receiving the notice of the establishment of mail by the underwriting group, the underwriting manager logs in the system for signing authentication. The underwriter may choose to agree to the reference group or not agree to the reference group. If all underwriters agree to join the underwriter group, this indicates that the bond underwriter group was successfully built, and the bond enters the next circulation state. If there is a underwriter that does not agree to join the underwriter, the bookkeeping manager will receive notification that the underwriter member may be subsequently re-edited to initiate the group authentication process again. Fig. 4 is a flowchart of online contractual signing of a contractor provided in an embodiment of the present invention.
④ And the bond buying module is used for each contractor to execute bond buying operation. When the bond begins to be purchased, the underwriter member logs into the system to perform bond purchasing operations. The system will compare the underwriter with the blockchain stored underwriter group information to determine if it is a member of the underwriter group. If yes, continuing the buying step, and if not, rejecting the buying operation.
⑤ And the blockchain module is used for constructing a blockchain system for storing the underwriting group information. Optionally, the embodiment of the invention encapsulates Fabric Java Sdk into Dubbo micro-services by using Spring Boot, decouples, facilitates external call and provides interaction function between fabric network and application layer.
Based on the same inventive concept, the embodiment of the invention also provides a device for verifying the member information of the bond underwriting group based on the blockchain, as described in the following embodiment. Because the principle of solving the problem of the embodiment of the device is similar to that of the member information verification method of the bond bearing group based on the blockchain, the implementation of the embodiment of the device can be referred to the implementation of the method, and the repetition is omitted.
Fig. 5 is a schematic diagram of a device for verifying member information of a bond underwriting group based on blockchain, according to an embodiment of the present invention, as shown in fig. 5, the device includes: an information acquisition module 51, a blockchain lookup module 52, and an information verification module 53.
Wherein the information acquisition module 51 is configured to acquire underwriter information of one or more underwriters currently buying the target bond; the blockchain searching module 52 is configured to search the information of the underwriting group of the target bond stored on the blockchain system, where the information of the underwriting group of the target bond includes: member information of each underwriting group member in the underwriting group of the target bond; the information verification module 53 is configured to verify whether each underwriter of the currently-purchased target bond is an underwriter member of the target bond according to information of each underwriter of the currently-purchased target bond and member information of each underwriter member of the underwriter of the target bond.
As can be seen from the above, the device for verifying member information of a debt underwriting group based on blockchain provided by the embodiment of the present invention obtains the underwriting information of each underwriting person of the currently-applied target debt through the information obtaining module 51; searching for the underwriting group information of the target bond stored on the blockchain system through the blockchain searching module 52; and verifying whether each underwriter of the currently-purchased target bond is an underwriter member of the target bond according to the underwriter information of each underwriter of the currently-purchased target bond and the member information of each underwriter member of the underwriter of the target bond by the information verification module 53.
According to the block chain-based bond group member information verification device provided by the embodiment of the invention, the block chain-based system stores the group information of the bonds, so that the group information of the bonds is non-tamper-resistant, the bond system can automatically identify whether the currently-applied bond is a group member of the bonds, a large number of manual operations are avoided, and the bond purchasing efficiency is improved.
In an optional embodiment, the blockchain-based device for verifying member information of a bond underwriting group provided by the embodiment of the present invention may further include: the bearing group building module 54 is configured to build a bearing group of the target bond, and generate bearing group information of the target bond, where the bearing group of the target bond includes: one or more underwriters; the blockchain storage module 55 is used for storing the information of the underwriting group of the target bond to the blockchain system.
Optionally, the above-mentioned underwriting group building module 54 is further configured to obtain the selected one or more underwriters, send a building request to each selected underwriter through the blockchain system, and receive a response result returned by each underwriter through the blockchain system, and when the response result returned by each underwriter is all the first response result, build an underwriting group of the target bond, and generate underwriting group information of the target bond, where the building request is for building an underwriting group of the target bond; the response result comprises: and a first response result and a second response result, wherein the first response result represents that each underwriter agrees to the underwriter of the target bond, and the second response result represents that each underwriter refuses to join the underwriter of the target bond.
Further, in the case that the response results returned by the respective underwriters are not all the first response results, the above-mentioned underwriter group building module 54 is further configured to obtain the reselected one or more underwriters, and send the building request to the selected individual underwriters through the blockchain system.
Optionally, the blockchain storage module 55 is further configured to obtain CA certificates of respective underwriters in the underwriter group information of the target bond, verify the CA certificates of the respective underwriters, and store the underwriter group information of the target bond to the blockchain system in a key value pair in a case that the CA certificates of the respective underwriters pass, where the key is identification information of the target bond and the value is member information of each underwriter member.
Further, the blockchain storage module 55 is further configured to receive a registration request of each underwriter, send underwriter information of each underwriter to the CA server according to the registration request of each underwriter, and receive a CA certificate returned from the CA server to each underwriter, where the registration request includes underwriter information of each underwriter.
In an optional embodiment, the blockchain-based device for verifying member information of a bond underwriting group provided by the embodiment of the present invention may further include: a message notification module 56 for generating a construction notification message for the target bond and transmitting the construction notification message for the target bond to each underwriter through the blockchain system.
The embodiment of the invention also provides a computer device which is used for solving the technical problem that a great deal of manual operations are involved in the verification of whether the underwriter of the currently purchased bond is a underwriter member of the bond in the existing bond system.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problem that a great deal of manual operations are involved in verifying whether a underwriter of a currently-purchased bond is a underwriter member of the bond in the existing bond system, wherein the computer readable storage medium stores a computer program for executing the block chain-based bond underwriter member information verification method.
In summary, the embodiments of the present invention provide a method, an apparatus, a computer device, and a computer readable storage medium for verifying the information of the group members of a bond based on a blockchain, which verify each group member in the group of the bond through a blockchain intelligent contract, and store the group information to each node of the blockchain system after the verification is passed, because the group information stored in the blockchain is stored through multiple parties in a consensus manner, the group information of the bond has the characteristics of disclosure, transparency, and tamper resistance. When the underwriter buys the bond, the system automatically compares the underwriter information with the blockchain stored underwriter group information to verify whether the underwriter currently buying the bond is the underwriter group member of the bond, thereby achieving the purpose of automatically identifying and checking identity information.
The embodiment of the invention can realize but is not limited to the following technical effects: ① The underwriter applies for the CA certificate when registering, is used for identity verification during the uplink, and improves the data security; ② The contractor signs online, so that signing operation is more flexible and convenient; ③ When the bond is purchased by the underwriter, whether the bond is a underwriter group member is automatically judged, so that the manual operation is reduced, and the verification efficiency is improved; ④ The block chain system is used for storing the information of the underwriting group, so that the purposes of disclosure, transparency and tamper resistance can be achieved.
It will be appreciated by those skilled in the art that 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 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The method for verifying the member information of the bond bearing group based on the blockchain is characterized by being developed based on a Spring Boot framework and comprises the following steps:
and constructing a bearing group of the target bond, and generating bearing group information of the target bond, wherein the bearing group of the target bond comprises the following components: one or more underwriters;
Storing the underwriting group information of the target bond to a blockchain system;
Acquiring, when a bond applying operation of one or more contractors is detected, contractor information of the one or more contractors of the currently applied target bonds;
searching the information of the underwriting group of the target bond stored on the blockchain system, wherein the information of the underwriting group of the target bond comprises the following steps: member information of each underwriting group member in the underwriting group of the target bond;
Verifying whether each underwriter currently buying the target bond is a underwriter member of the target bond according to the underwriter information of each underwriter of the target bond and the member information of each underwriter member in the underwriter group of the target bond;
Wherein constructing the underwriting group of the target bond, generating underwriting group information of the target bond, comprises:
Acquiring one or more selected underwriters, and sending a construction request to each selected underwriter through a blockchain system, wherein the construction request is used for constructing an underwriter group of the target bond;
Receiving response results returned by each underwriter through the blockchain system, wherein the response results comprise: a first response result and a second response result, the first response result representing that each underwriter agrees to join the underwriter of the target bond, the second response result representing that each underwriter refuses to join the underwriter of the target bond;
When the response results returned by all underwriters are the first response results, constructing an underwriting group of the target bond, and generating underwriting group information of the target bond;
when the response results returned by the contractors are not all the first response results, acquiring one or more reselected contractors, and sending a construction request to the selected contractors through a block chain system;
storing the underwriting group information of the target bond to a blockchain system, comprising:
acquiring CA certificates of all underwriters in the underwriter group information of the target bond;
Verifying the CA certificates of all underwriters;
and under the condition that the CA certificate of each underwriter passes verification, storing the underwriter group information of the target bond into a blockchain system in the form of key value pairs, wherein a key is identification information of the target bond, and the value is member information of each underwriter member.
2. The method of claim 1, wherein obtaining CA certificates for each underwriter in the underwriter group information for the target bond comprises:
Receiving registration requests of all underwriters, wherein the registration requests contain underwriter information of all underwriters;
according to the registration request of each underwriter, transmitting the underwriter information of each underwriter to a CA server;
And receiving CA certificates returned to the contractors by the CA server.
3. The method of claim 1, wherein after constructing the underwriter group of the target bond and generating underwriter group information of the target bond, the method further comprises:
generating a construction notification message of the target bond;
And sending the construction notification message of the target bond to each underwriter through a blockchain system.
4. A blockchain-based bond underwriting group member information verification device, the device developed based on a Spring Boot framework, the device comprising:
The system comprises a bearing group construction module, a target bond bearing group construction module and a target bond bearing group construction module, wherein the bearing group construction module is used for constructing the bearing group of the target bond and generating bearing group information of the target bond, and the bearing group of the target bond comprises: one or more underwriters;
The block chain storage module is used for storing the information of the bearing group of the target bond to the block chain system;
An information acquisition module for acquiring, when a bond application operation of one or more underwriters is detected, underwriter information of one or more underwriters of a currently applied target bond;
the blockchain searching module is used for searching the information of the underwriting group of the target bond stored on the blockchain system, wherein the information of the underwriting group of the target bond comprises the following components: member information of each underwriting group member in the underwriting group of the target bond;
The information verification module is used for verifying whether each underwriter currently buying the target bond is an underwriter member of the target bond according to the underwriter information of each underwriter of the target bond and the member information of each underwriter member in the underwriter group of the target bond;
wherein, the underwriting group module is further for:
Acquiring one or more selected underwriters, and sending a construction request to each selected underwriter through a blockchain system, wherein the construction request is used for constructing an underwriter group of the target bond;
Receiving response results returned by each underwriter through the blockchain system, wherein the response results comprise: a first response result and a second response result, the first response result representing that each underwriter agrees to join the underwriter of the target bond, the second response result representing that each underwriter refuses to join the underwriter of the target bond;
When the response results returned by all underwriters are the first response results, constructing an underwriting group of the target bond, and generating underwriting group information of the target bond;
when the response results returned by the contractors are not all the first response results, acquiring one or more reselected contractors, and sending a construction request to the selected contractors through a block chain system;
the blockchain storage module is further to:
acquiring CA certificates of all underwriters in the underwriter group information of the target bond;
Verifying the CA certificates of all underwriters;
and under the condition that the CA certificate of each underwriter passes verification, storing the underwriter group information of the target bond into a blockchain system in the form of key value pairs, wherein a key is identification information of the target bond, and the value is member information of each underwriter member.
5. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the blockchain-based bond underwriting group member information verification method of any of claims 1 to 3 when the computer program is executed by the processor.
6. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the blockchain-based bond underwriting group member information verification method of any one of claims 1 to 3.
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