CN111259077B

CN111259077B - Method for carrying out import escort under consignment item based on blockchain and storage medium

Info

Publication number: CN111259077B
Application number: CN202010036960.9A
Authority: CN
Inventors: 马超群; 常晓星; 周中定; 李信儒; 兰秋军
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2023-09-26
Anticipated expiration: 2040-01-14
Also published as: CN111259077A

Abstract

The invention discloses a method for carrying out import escort under a consignment item based on a blockchain and a computer-readable storage medium. The method utilizes consensus technology, asymmetric encryption, hash algorithm, digital signature technology and blockchain data structure to realize the electronization of the bill, and is not tamperable and falsified, so as to ensure the authenticity of various bills used in business and solve the problems of easy counterfeiting and inconvenient verification of paper bills. And the blockchain network can be in butt joint with an application layer through an interface, so that the interaction of key data is realized, and the problem of credit investigation difficulty caused by unclear business conditions and transaction histories of banks to enterprises in the traditional trade financing business is solved to a certain extent. In addition, all steps in the process of sending goods to receiving can be recorded through the blockchain, the whole process of loading, transporting and taking the goods can be clearly recorded on the blockchain, and the traceability of information is ensured, so that the occurrence of packet loss and error claim events is avoided.

Description

Method for carrying out import escort under consignment item based on blockchain and storage medium

Technical Field

The invention relates to the technical field of import and export trade and relates to a method for carrying out import escort under a consignment item based on a blockchain and a computer-readable storage medium.

Background

The import escort refers to the business that the bank applies for importer, provides short-term funds to be melted when the bank pays for the outside, and pays the information by the applicant according to the agreed interest rate and term. The method is divided into imported escort under credit card item, imported escort under consignment item and imported escort under remittance item according to settlement mode. The import escort under the consignment term is also called an import escort, and is a financing cushion provided for the importer by taking the import escort document including the material right document as mortgage. The basic practice is that after the export is shipped, the consignment application is filled in, and the consignment application is completed by means of a complete set of documents (including transportation documents, business documents such as draft and invoice) are submitted to the collection row, the collection row sends a collection order book together with the draft and the receipt to the collection row for consignment, and then the collection row is used for consignment of importers. Depending on the nature of the collection, the importer pays for the receipt or receives the receipt. The collection can open the collection trust receipt according to the escort application of the importer, and the collection trust receipt is firstly paid to the outside, and the collected goods are returned to the bank after the importer picks up goods and processes, sells or resells the goods.

However, the existing import escort method has the following problems:

1. as the security deposit is used for guaranteeing that the bill is a paper bill, the fraud of the bill also happens in international trade, and the financing risk of the bank is increased.

2. In the traditional international trade financing activities, the information of banks and imported enterprises is asymmetric, the banks do not know whether the financial condition of the imported enterprises is stable or not, and whether the historical reputation condition is good or not, so that the banks are not beneficial to financing approval and the imported enterprises to acquire financing.

3. In the actual operation flow of import escort, after a bill of lading and an importer sign a trust agreement, the bank has only the ownership of goods on the upper surface and cannot actually control the flow direction of the goods, if the import escort applicant expires and cannot return the import escort and the goods for various reasons, the bank has the risk of losing money and goods.

Disclosure of Invention

The invention provides a method for carrying out import escort under a consignment item based on a blockchain and a computer readable storage medium, which are used for solving the technical problems that a bill is easy to tamper, information is asymmetric and the circulation process of goods cannot be monitored in the existing import escort mode.

According to one aspect of the invention, there is provided a method for performing under-consignment import escort based on blockchain, comprising the steps of:

step S1: the importer node and the exporter node sign trade contracts in a blockchain and agree to adopt a collection mode for settlement;

step S2: the collecting node signs an import collecting and collecting contract with the importer node on a blockchain after evaluating the credit condition based on the request of the importer node, and the collecting node and the exporter node carry out Hash signature confirmation on the import collecting contract on the blockchain;

step S3: the export business node performs goods export transportation activities after finishing the goods preparation, and relevant information in the goods export process is uploaded to the blockchain after being signed by relevant node Hash;

step S4: the exporter node applies for acceptance to the collection node based on the bill of lading, the collection node informs the collection node of payment, the collection node obtains ownership of the bill of lading after payment is finished, and the importer node is informed to conduct redemption of the bill;

step S5: signing a trust protocol on a blockchain by an importer node and a collection node, and obtaining the use right of a bill of lading by the importer node;

step S6: the importer node performs cargo import transportation activities, and relevant information in the cargo import process is uploaded to the blockchain after being signed by relevant node Hash;

Step S7: the importer node picks up goods to process, sell or resell and pays to the collecting node, and the payment record is signed by the Oracle node Hash and uploaded to the blockchain.

Further, the step S2 includes the steps of:

step S21: the importer node applies for signing import escort contract to the escort node according to trade contract, deploys an import escort contract application form on the blockchain, performs Hash signature on the application form after relevant information is filled, and transmits the application form to the escort node;

step S22: after receiving the import escort contract application form of the importer node, the escort node verifies by using the public key of the importer node, confirms that the application form is really from the importer node, and requests the third party credit bureau node to call credit investigation data about the importer node;

step S23: after receiving the request, the third party credit bureau node informs the Oracle node to apply for investigation of the business data, tax data, product data and social evaluation data of the importer node;

step S24: the Oracle node generates a survey report and carries out a Hash signature and then uploads the survey report to the blockchain, and the third party credit agency node determines credit investigation data and generates a credit condition table according to the survey report and the transaction history of the importer node, carries out the Hash signature and uploads the Hash signature to the blockchain;

Step S25: the receiving node of the generation verifies by using the public key of the third party credit agency, determines a credit condition table from the third party credit agency node, sets a escort credit limit for the third party credit agency node according to the credit condition of the importer node, then determines whether to sign an import escort contract with the importer node, if so, generates a refusal notice and carries out Hash signature, then uploads the report to the blockchain, and if so, deploys the import escort contract on the blockchain and carries out Hash signature and then sends the report to the importer node;

step S26: after verifying the import escort contract, the importer node confirms the Hash signature and uploads the Hash signature to the blockchain, and sends the signed import escort contract to the consignment node;

step S27: after receiving the import escort contract, the consignment node verifies that the signature confirms the import escort contract from the importer node, then carries out Hash signature on the import escort contract and uploads the Hash signature to the blockchain, and sends the signed import escort contract to the exporter node;

step S28: and the exporter node receives the import escort contract from the collection node, verifies by using the public key of the collection node, confirms that the import escort contract is the import escort contract from the collection node, performs Hash signature on the import escort contract, and uploads the Hash signature to the blockchain.

Further, the step S1 includes the steps of:

step S11: after the importer node pays good trade details with the exporter node on line, the trade contract is deployed on the blockchain, the digest of the trade contract is encrypted by utilizing the private key of the importer node, and the contract is resolved by adopting a collection mode in the trade contract;

step S12: the exporter node uses the public key of the importer node to verify, and determines that the trade contract is drawn by the importer node and the contract content is correct, and uses the private key to carry out Hash signature confirmation on the blockchain.

Further, the step S3 includes the steps of:

step S31: the export commodity circulation node starts to prepare goods, applies for renting a ship to order a warehouse from the export commodity circulation node according to contract regulations, deploys a transportation sheet comprising information related to goods transportation on a blockchain, sends out the export commodity circulation node after carrying out Hash signature, and carries out Hash signature on the transportation sheet and uploads the transportation sheet to the blockchain after receiving the transportation sheet by the export commodity circulation node;

step S32: the exporter node makes an insurance to the exporter insurance company node, after making an offline negotiation to determine various insurance matters, the exporter insurance company node generates a policy and makes a Hash signature, then sends the policy to the exporter node and records the policy on a blockchain, and the exporter node makes an insurance after verifying the signature and the policy without errors, and makes a Hash signature confirmation on the policy and then issues the policy on the blockchain;

Step S33: the export business node applies for goods business inspection to the export business inspection office node, and after receiving the application, the export business inspection office node performs goods business inspection, and after the business inspection is qualified, issues a business inspection report, performs Hash signature and issues the report to the blockchain;

step S34: the export business node applies for the export commodity certificate of the enterprise proxy from the export business office node, and the export business office node receives the application, issues the export commodity certificate of the enterprise proxy and issues the export commodity certificate to the blockchain network after Hash signing;

step S35: the export business node applies for the on-site inspection to the export customs node, the export customs node performs the on-site inspection after receiving the application, opens a release notice and performs a Hash signature after determining that the export goods meet the requirements, and issues the release notice to the blockchain network;

step S36: the exporter node delivers goods to the exporter logistics node, and the exporter logistics node opens a bill of lading, carries out Hash signature, then sends the bill of lading to the exporter node and records the bill of lading on a blockchain;

step S37: after receiving the bill of lading verification, the exporter node carries out Hash signature confirmation, and issues the signed bill of lading to the block chain network;

step S38: the export business node uploads the invoice related documents of goods to the blockchain network, applies tax returns to the export tax bureau node, examines the documents, processes the export tax returns after verification, issues tax returns, performs Hash signature, uploads the tax returns to the blockchain, and notifies the export business node.

Further, the step S4 includes the steps of:

step S41: the exporter node obtains a bill of lading and applies for acceptance to the acceptance node, the acceptance node receives the acceptance application, reviews the bill on the block chain, and notifies the acceptance node of payment after confirming that the bill is correct;

step S42: the collection node pays the money to the collection node, and notifies the Oracle node to issue the transfer record Hash signature to the blockchain network;

step S43: the collection line node receives the goods money, issues a signed received goods money statement to the blockchain network, then remits the goods money to the export node, informs the export node to collect money, and informs the Oracle node to issue the transfer record after Hash signing to the blockchain network;

step S44: the exporter node receives the goods money, issues all the statement of the received goods money and the bill of lading is returned to the collection node, and uploads the statement to the blockchain network after Hash signing;

step S45: the collection node obtains ownership of the bill of lading, then issues all statement of the bill of lading collection node, and uploads the statement to the blockchain network after Hash signing;

step S46: the acquiring node obtains ownership of the bill of lading and notifies the importer node of the redemption of the bill.

Further, the step S5 includes the steps of:

step S51: the importer node applies for financing to the collecting node, fills relevant information in the imported escort application form, carries out Hash signature, sends the relevant information to the collecting node and issues the relevant information to the blockchain network;

step S52: the receiving-substitute node receives an import receiving-escort application, decides to provide import escort service for the importer node according to the credit condition of the importer node, opens a trust receipt, negotiates with the importer node, deploys a trust protocol on a blockchain, carries out Hash signature and sends the trust protocol to the importer node;

step S53: the importer node verifies the authenticity of the trust protocol by using the public key of the line receiving node, determines that the content is error-free, then carries out Hash signature confirmation, and issues the signed trust protocol to the blockchain network;

step S54: the collecting node verifies by using the public key of the importer node, confirms that the importer node agrees to the terms on the trust agreement, and issues statement that the bill of lading use right belongs to the importer node to the blockchain network, and the importer node obtains the bill of lading use right.

Further, the step S6 includes the steps of:

step S61: the importer node puts forward a commodity inspection application to the importer commodity inspection bureau node, and the importer commodity inspection bureau node issues a Hash signature on a commodity inspection qualified certificate to the blockchain network after inspecting that imported goods are qualified;

Step S62: the importer node applies for permission import evidence to the importer business office node, the importer business office node receives the application, issues permission import evidence and carries out Hash signature after the importer business office node is qualified for verification, and then uploads the permission import evidence to the blockchain network;

step S63: the importer node applies for a tax bureau node of the importer for paying a tax, the tax bureau node of the importer receives the application, and processes the tax payment for paying the tax after the importer node is verified to be qualified, and the paid tax certificate after the Hash signature is issued to the blockchain network;

step S64: the importer node applies for in-situ inspection to the importer customs node, the importer customs node receives the application, after the inspection of goods is qualified, the importer node issues a release notice, and issues the release notice into the blockchain network after Hash signing;

step S65: the importer node successfully picks up goods and stores the goods in a warehouse of the importer logistics node, the importer logistics node receives the goods, checks and then sends a stored goods list, and sends the stored goods list to the importer node after Hash signature;

step S66: and the importer node receives the warehouse inventory, checks the warehouse inventory, performs Hash signature confirmation on the warehouse inventory, and then issues the warehouse inventory to the blockchain network.

Further, the following steps are included between the step S6 and the step S7:

Step S67: after negotiating various insurance matters under the node line of the importer and the node line of the importer, the node of the importer generates an insurance policy and carries out Hash signature and then sends the insurance policy to the importer node, and the importer node receives the insurance policy, carries out Hash signature confirmation and then issues the insurance policy to the blockchain network after checking.

Further, the step S7 includes the steps of:

step S71: the importer node transfers the money, interest and handling fees to the collecting node after processing, selling or resale the warehouse goods of the importer logistics node, and notifies the Oracle node to issue the transfer record to the blockchain network after Hash signing;

step S72: after receiving the goods money, interest and handling fees, the collecting node informs the Oracle node of showing the statement and issuing the statement to the blockchain network after carrying out Hash signature.

The present invention also provides a computer readable storage medium storing a computer program for performing under-consignment import escort based on blockchain, which when run on a computer performs the method for under-consignment import escort based on blockchain as described above.

The invention has the following beneficial effects:

the method for carrying out import escort under the consignment item based on the blockchain realizes the electronization of the bill, the falsification and counterfeiting prevention of the bill by utilizing the consensus technology, the asymmetric encryption, the Hash algorithm, the digital identity, the digital signature technology and the blockchain data structure, ensures the authenticity of various bills used in the business and solves the problems of easy counterfeiting and inconvenient verification of paper bills. And moreover, the blockchain can connect the mutually untrusted nodes together to realize the transmission of a trust mechanism, has the characteristics of non-falsification, traceability, privacy protection and the like, and the blockchain network is used as a bottom layer architecture and can be in butt joint with an application layer through an interface, so that the interaction of key data is realized, and the problem of credit investigation difficulty caused by unclear business conditions and transaction histories of banks to enterprises in the traditional trade financing service is solved to a certain extent. In addition, all steps in the process of sending goods to receiving can be recorded through the blockchain, the whole flow and transportation flow of goods from loading, transporting and taking can be clearly recorded on the blockchain, and the traceability of information is ensured, so that the occurrence of package loss and error claim events is avoided, and enterprises can master the logistics direction of products through the blockchain, thereby preventing fleeing goods and being beneficial to false making.

In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 is a block chain network deployment diagram of a method for performing under-consignment import escort based on block chains in accordance with a preferred embodiment of the present application.

Fig. 2 is a schematic diagram of a business network of a method for performing under-consignment import escort based on blockchains in accordance with a preferred embodiment of the present application.

FIG. 3 is a flow chart of a method for performing under-consignment import escort based on blockchains in accordance with a preferred embodiment of the present application.

Fig. 4 is a schematic flow chart of step S1 in fig. 3 according to a preferred embodiment of the present application.

Fig. 5 is a schematic flow chart of step S2 in fig. 3 according to a preferred embodiment of the present application.

Fig. 6 is a schematic flow chart of step S3 in fig. 3 according to a preferred embodiment of the present application.

Fig. 7 is a schematic flow chart of step S4 in fig. 3 according to a preferred embodiment of the present application.

Fig. 8 is a schematic flow chart of step S5 in fig. 3 according to a preferred embodiment of the present invention.

Fig. 9 is a schematic sub-flow chart of step S6 in fig. 3 according to a preferred embodiment of the present invention.

Fig. 10 is a schematic flow chart of step S7 in fig. 3 according to a preferred embodiment of the present invention.

Detailed Description

Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.

For ease of understanding, as shown in fig. 1 and 2, the following explains the multi-party nodes involved in the blockchain network in the blockchain-based method of consignment import escort.

1. Oracle node (prophetic machine): the mechanism of writing the information outside the blockchain into the blockchain is the only way for the intelligent contract to interact with the external data, and is also the interface for the blockchain to interact with the real world data;

2. exporter node: refers to international trade companies, manufacturing enterprises and other units engaged in international product export;

3. exporter business inspection bureau node: indicating the mouth party to carry out inspection mechanisms including health quarantine, commodity inspection and the like on the exported goods;

4. export bureau node: the government is responsible for supervising and managing the commodity quality of the export goods and auditing and supervising the operation condition of the export enterprise;

5. The exporter tax bureau node: the government organization that manages tax work is responsible for transacting tax business such as tax refund to the export commodity in this scene;

6. exporter insurance company node: the method refers to a company for providing corresponding insurance service for damage to the quantity and quality of goods caused in the processes of transportation, loading and unloading of export goods and the like;

7. export customs node: the government agency responsible for collecting and protecting tariffs and controlling export goods;

8. export side logistics node: the process of the importer transferring the goods from the export to the import is pointed out. The method mainly comprises the steps of planning, management and control processes of transportation, loading, unloading, storage, packaging, distribution, logistics processing, information processing and the like;

9. and (5) a line substituting node: the importation bank receives the consignment of the consignment and pays the payor (importer). The collecting row receives the requirement of importer, and after importer (issuing applicant) signs import collecting deposit contract and trust receipt, the importer collecting deposit is transacted, and the money obtained by the import collecting deposit is directly used for paying to the exporting place collecting row;

10. importer business inspection bureau node: indicating that the importer carries out inspection mechanisms including health quarantine, commodity inspection and the like on imported goods;

11. Ingress square business office node: the government is responsible for supervising and managing the commodity quality of imported goods and auditing and supervising the operation condition of export enterprises;

12. importer customs node: the government organization responsible for collecting and protecting tariffs and controlling the goods at the gold deposit;

13. importer tax bureau node: the government organization that manages tax work is responsible for transacting tax service such as paying tax to import commodity in this scene;

14. and (3) collecting row nodes: a bank which receives the consignment of the consignor and is responsible for transacting the collection business;

15. importer node: refers to international trade companies, manufacturing enterprises and other units engaged in international product import;

16. entering side logistics node: refers to the process of transferring the incoming cargo. The method mainly comprises the steps of planning, handling, storing, packaging, distributing, logistics processing, information processing and the like, managing and controlling the process.

17. Importer insurance company node: the method refers to a company for providing corresponding insurance service for damages to the quantity and quality of goods caused by imported goods in the processes of transportation, loading and unloading and the like;

18. third party credit bureau node: the agency is specially used for various credit management activities, and has the main functions of providing service for credit transactions of market subjects, solving the problem of information asymmetry which puzzles the credit transactions, and avoiding the bad belief and the bad der behaviors such as reverse selection and moral risk.

As shown in fig. 3, a preferred embodiment of the present invention provides a method for performing under-consignment import escort based on blockchain, comprising the steps of:

In this embodiment, the method for performing import escort under the consignment term based on the blockchain uses consensus technology, asymmetric encryption, hash algorithm, digital identity, digital signature technology and blockchain data structure to realize the electronization of the bill, and can not be tampered or forged, ensure the authenticity of various bills used in the business, and solve the problems of easy counterfeiting and inconvenient verification of paper bills. And moreover, the blockchain can connect the mutually untrusted nodes together to realize the transmission of a trust mechanism, has the characteristics of non-falsification, traceability, privacy protection and the like, and the blockchain network is used as a bottom layer architecture and can be in butt joint with an application layer through an interface, so that the interaction of key data is realized, and the problem of credit investigation difficulty caused by unclear business conditions and transaction histories of banks to enterprises in the traditional trade financing service is solved to a certain extent. In addition, all steps in the process of sending goods to receiving can be recorded through the blockchain, the whole flow and transportation flow of goods from loading, transporting and taking can be clearly recorded on the blockchain, and the traceability of information is ensured, so that the occurrence of package loss and error claim events is avoided, and enterprises can master the logistics direction of products through the blockchain, thereby preventing fleeing goods and being beneficial to false making.

It will be appreciated that, as shown in fig. 4, the step S1 includes the steps of:

In the step S1, signing of trade contracts is carried out on a blockchain, the contracts can be prevented from being tampered maliciously, information is disclosed and transparent, and other party nodes can effectively supervise the authenticity of trade conveniently.

It will be appreciated that, as shown in fig. 5, the step S2 includes the steps of:

In the step S2, the signing process of the import escort contract is automatically performed on the blockchain based on the intelligent contract technology, so that the transmission and examination processes of the related application form and the bill are simplified, the manpower, material resources, financial resources and time cost are saved, the whole financing process is quicker, safer and more intelligent, and the credit investigation condition of the importer node can be accurately evaluated by the escort node through the third party credit agency node, the financing risk of the source node is reduced, and the potential risk formed by poor reputation and performance of the importer node is also solved.

It will be appreciated that, as shown in fig. 6, the step S3 includes the steps of:

In the step S3, the information in the cargo export circulation process is all signed by the relevant nodes and then uploaded to the blockchain, and the whole cargo export process is transparent and open on the blockchain, so that the export circulation process of the cargo is effectively monitored by the nodes of each party, particularly the collection node, and the traceability of the information is ensured, and the situation of faking of the export information is prevented.

It will be appreciated that, as shown in fig. 7, the step S4 includes the steps of:

In the step S6, the exporter node applies for receiving after obtaining the bill of lading, and the transfer records in the receiving process are all uploaded to the blockchain after being signed by the Oracle node Hash, so that the authenticity of the transfer is ensured, the false transaction is prevented from occurring, the transfer process of the ownership of the bill of lading is also performed transparently on the blockchain, and the receiving node can effectively monitor the attribution process of the ownership of the bill of lading conveniently.

It will be appreciated that, as shown in fig. 8, the step S5 includes the steps of:

In the step S5, the financing process is performed transparently on the blockchain based on the intelligent contract technology, so that the exporter node and the collection node can effectively monitor, the financing progress is accelerated, and the fast, safe and intelligent financing is facilitated.

It will be appreciated that, as shown in fig. 9, the step S6 includes the steps of:

In the step S6, the information in the goods import circulation process is all signed by the relevant nodes and then uploaded to the blockchain, and the whole goods import process is disclosed and transparent on the blockchain, so that the nodes of each party, especially the collection node, can effectively monitor the import circulation process of the goods, the traceability of the goods import information is ensured, and the situations of packet loss and error claim are avoided.

It will be appreciated that, preferably, the method for performing under-consignment import escort based on blockchain further includes the following steps between the step S6 and the step S7:

It will be appreciated that as shown in fig. 10, the step S7 includes the steps of:

In the step S7, the importer node firstly carries out goods picking, processing, selling or resale and returns, and pays goods, interest and commission to the substitute receiving node, so that the problem of funds shortage of the importer node is greatly relieved, and the transfer record is signed by the Oracle node and then uploaded to the blockchain, thereby ensuring the authenticity of the transfer and facilitating the later tracing.

It will be appreciated that a second embodiment of the present invention also provides a computer readable storage medium storing a computer program for performing, when running on a computer, a method of blockchain-based under-consignment import escort as described above.

Forms of general computer-readable media include: a floppy disk (floppy disk), a flexible disk (flexible disk), hard disk, magnetic tape, any other magnetic medium, a CD-ROM, any other optical medium, punch cards, paper tape, any other physical medium with patterns of holes, a Random Access Memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a FLASH erasable programmable read-only memory (FLASH-EPROM), any other memory chip or cartridge, or any other medium from which a computer can read. The instructions may further be transmitted or received over a transmission medium. The term transmission medium may include any tangible or intangible medium that may be used to store, encode, or carry instructions for execution by a machine, and includes digital or analog communications signals or their communications with intangible medium that facilitate communication of such instructions. Transmission media includes coaxial cables, copper wire and fiber optics, including the wires that comprise a bus for transmitting computer data signals.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for carrying out import escort under consignment item based on blockchain is characterized in that,

the method comprises the following steps:

step S7: the importer node picks up goods to process, sell or resell and pays to the collecting node, and the payment record is uploaded to the blockchain after being signed by the Oracle node Hash;

the step S1 includes the steps of:

step S12: the exporter node uses the public key of the importer node to verify, confirm that the trade contract is drawn up by the importer node and the contract content is correct, and uses the private key to carry out Hash signature confirmation on the blockchain;

the step S2 includes the steps of:

step S28: the method comprises the steps that an exporter node receives an import escort contract from a collection node, the public key of the collection node is utilized for verification, the import escort contract from the collection node is confirmed, and the import escort contract is uploaded to a blockchain after Hash signature is carried out on the import escort contract;

the step S3 includes the steps of:

step S38: the export business node uploads the invoice related bill of the goods to the blockchain network, applies for tax refund to the export tax office node, the export tax office node checks the bill, processes the export tax refund after verification is correct, issues tax refund evidence, performs Hash signature, uploads the tax refund to the blockchain, and notifies the export business node;

the step S4 includes the steps of:

step S46: the collecting node obtains ownership of the bill of lading and informs importer node to redeem the bill;

the step S5 includes the steps of:

Step S54: the collecting node verifies by using the public key of the importer node, confirms that the importer node agrees to the clause on the trust agreement, and issues statement that the bill of lading use right belongs to the importer node to the blockchain network, and the importer node obtains the bill of lading use right;

the step S6 includes the steps of:

step S66: the importer node receives the warehouse inventory, checks the warehouse inventory, performs Hash signature confirmation on the warehouse inventory, and then issues the warehouse inventory to the blockchain network;

step S67: after negotiating various insurance matters under the node line of the importer and the node line of the importer insurance company, the node of the importer insurance company generates an insurance policy and carries out Hash signature and then sends the insurance policy to the importer node, and the importer node receives the insurance policy, carries out Hash signature confirmation and then issues the insurance policy to the blockchain network after checking;

the step S7 includes the steps of:

2. A computer readable storage medium storing a computer program for under-consignment import escort based on a blockchain, the computer program when run on a computer performing the method for under-consignment import escort based on a blockchain as in claim 1.