CN111080435B

CN111080435B - Block chain-based import accounting method and computer-readable storage medium

Info

Publication number: CN111080435B
Application number: CN201911210942.1A
Authority: CN
Inventors: 马超群; 陈冬晴; 周中定; 李信儒
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2023-09-26
Anticipated expiration: 2039-12-02
Also published as: CN111080435A

Abstract

The application discloses a method for issuing import based on blockchain and a computer readable storage medium. The method for issuing the import based on the blockchain comprehensively utilizes the asymmetric encryption technology, the intelligent contract technology, the hash algorithm, the digital signature and the identity authentication in the blockchain, simplifies the transaction execution process of issuing the import, reduces the default and fraud possibility of both import and export parties, solves the trust and risk problems in payment and delivery, improves the trust degree of both transaction parties, reduces the risk born by banks, improves the transaction safety, reduces the fund occupation, improves the cash flow and realizes faster, safe and reliable trade activities.

Description

Block chain-based import accounting method and computer-readable storage medium

Technical Field

The application relates to the technical field of import opening in trade financing, in particular to a method for carrying out import opening based on blockchain and a computer readable storage medium.

Background

As shown in fig. 1, the import opening is a commitment that a bank (issuing bank) pays or accepts the responsibility of long-term payment to an exporter (beneficiary) after receiving a receipt specified by a credit card, which is a conditional bank payment commitment, on the request of an importer (applicant) and an instruction to issue to the exporter (beneficiary). Banks generally deal with two modes for importation enterprises: firstly, issuing a full deposit, namely issuing a credit card for an enterprise by a bank after submitting a deposit with 100% of the amount of the deposit by the enterprise applying for the issuing; secondly, issuing credit card for import enterprises by the bank under the condition that the enterprise applying for issuing does not submit the deposit or the deposit amount is 100% of the deposit. In the credit issuing, issuing bank mainly earns issuing commissions. The credit card is a bank credit, and the issuing bank has a first payment responsibility; a letter of credit is a self-contained legal document that is independent of the contract; the credit card is a pure bill service, and when the bank processes the credit card service, the bank only depends on the bill and does not ask for goods, and only if the bill and the bill are consistent, the bank must pay.

However, the existing import evidence opening mode has the following problems:

(1) in the activities of the traditional international trade, the import and export parties may have credit risks and business risks or the joint fraud of the import and export parties, so that the problems of trust and risks exist in payment and delivery, the risk of the international trade is increased, and the transaction security is lower.

(2) The bank credit risk is used in import and export issuing, and once the conditions of unfunctioning or combined fraud and the like occur on both import and export parties, the bank is in a weakness state, and the bank funds and the credit are lost.

(3) The credit card involves the opening and verification of a large number of paper documents, and is easy to forge and tamper; and paper receipts often adopt the mode of mailing transmission in the transmission process, waste resources and greatly reduce the efficiency of trade activity.

Disclosure of Invention

The application provides a blockchain-based import opening method and a computer-readable storage medium, which are used for solving the technical problems of low transaction security, high bank credit risk and low working efficiency in the existing import opening mode.

According to one aspect of the present application, there is provided a blockchain-based method of import accounting, comprising the steps of:

step S1: deploying trade contracts on the blockchain based on the buyer's request, and signing and confirming the trade contracts on the blockchain by the buyer and the seller;

step S2: generating a credit card based on the buyer's request and recording it onto the blockchain;

step S3: the seller records the relevant information of the goods export onto the blockchain and links the relevant information to the credit card;

step S4: conducting a trade payment activity based on the request of the seller, checking the related information of the goods outlet and the correlation thereof with the credit card, paying the goods to the seller based on the trade contract, recording a certificate of payment of the goods on a blockchain and linking the certificate to the credit card;

step S5: and carrying out trade payment activity based on the request of the buyer, after confirming that the bill related to the credit card is correct, paying the goods money based on the trade contract by the buyer, recording the certificate of the payment of the goods money on a blockchain and linking the certificate to the credit card, and finally carrying out goods drawing and clearing activity based on the request of the buyer.

Further, the step S1 specifically includes the following:

step S11: the importer node requests a third party credit investigation mechanism node to confirm the operation condition and credit investigation condition of the exporter node on the blockchain, and the third party credit investigation mechanism node generates a credit investigation condition table of the exporter node, records the signature confirmation on the blockchain and sends the signature confirmation to the importer node;

step S12: after confirming that the import business node is correct, deploying an intentional book on the blockchain, carrying out signature confirmation, recording on the blockchain and sending to the export business node;

step S13: the export business node requests to the third party credit investigation organization node to confirm the operation condition and credit investigation condition of the import business node, the third party credit investigation organization node generates a credit investigation condition table of the import business node, and the signature is recorded on the blockchain after confirmation and is sent to the export business node;

step S14: after verifying the signature of the importer node, the exporter node confirms the signature on the intentional book;

step S15: the importer node deploys trade contracts on the blockchain, and sends and records the trade contracts to the importer node after signature confirmation;

step S16: the exporter node verifies the signature of the importer node and confirms the signature after confirming the trade contract.

Further, in the step S1, the importer node uses the private key to perform signature verification, and the exporter node uses the public key of the importer node to verify the signature of the importer node.

Further, the step S2 specifically includes the following:

step S21: the importer node deploys an issuing application form on the blockchain within the time specified by the trade contract and confirms the signature, and simultaneously sends the company's rules, financial statement and import contract to the issuing node and records the issuing application form on the blockchain;

step S22: after receiving the issuing application form, the issuing bank node checks the import qualification and repayment capacity of the importer according to the company's rules, financial report and import contract submitted by the importer node;

step S23: the issuing bank node applies for checking other information of the importer node outside the blockchain to the Oracle, including tax, borrowing conditions and credit grades, and the Oracle generates a qualification table of the importer node, sends the qualification table to the issuing bank node and records the qualification table on the blockchain;

step S24: the issuing bank node decides whether to agree to issue a credit card for the issuing bank node based on the evaluation results of the issuing bank node and Oracle, if refused, a refused notification is generated and sent to the issuing bank node and recorded on a blockchain, and if agreed, a signature is confirmed on the issuing application form;

step S25: the issuing bank node deploys an import credit card service credit agreement on the blockchain, the issuing bank node sends the signature confirmation to the importer node and records the signature confirmation to the blockchain after verifying that the signature of the issuing bank node is correct;

step S26: the issuing bank node issues a credit card for the issuing bank node according to the issuing application form and the import contract of the importer node, and the issuing bank node signs and confirms the storage card and records the storage card on the blockchain;

step S27: the issuing bank node sends the credit card to the notifying bank node and records the credit card on the blockchain, and the notifying bank node signs and confirms the storage of the credit card after checking;

step S28: the notice line node sends the credit card to the carrier node and records the credit card on the blockchain, the carrier node compares and checks the credit card with the signed trade contract content, and the signature is confirmed after the confirmation is correct.

Further, the step S3 specifically includes the following:

step S31: after goods are prepared, the export business invoice, the export contract, the export business invoice and the packing list are generated by the export business node, signature confirmation is recorded on the blockchain, the importer node is informed, and the importer node checks the signature confirmation after error;

step S32: the export commodity node deploys commodity inspection application forms on the blockchain, and sends and records the export commodity inspection office node to the blockchain after signature confirmation;

step S33: after confirming that the commodity inspection is qualified, the export business inspection bureau node records the commodity inspection application form signature on the blockchain after confirming and informs the export business node;

step S34: the exporter node deploys a shipping contract on the blockchain, the exporter node sends out the exporter logistics node after signature confirmation and records the export logistics node on the blockchain, and the exporter logistics node checks the signature of the exporter node to confirm that the signature is correct;

step S35: after receiving goods, the logistics node of the exporter generates a bill of lading signature confirmation, records the bill of lading signature confirmation on the blockchain and sends the bill of lading signature confirmation to the node of the exporter, and the node of the exporter verifies the signature of the logistics node of the exporter and confirms the signature after the signature of the logistics node of the exporter is correct;

step S36: before shipment, the logistics node of the exporter notifies the node of the exporter to apply for customs clearance, the node of the exporter deploys a customs clearance application form on the blockchain after receiving the notification, and the signature confirmation is recorded on the blockchain and is sent to the customs node of the exporter;

step S37: the customs node of the exporter reviews export contracts, export business invoices, packing lists, inspection lists and bill of lading, signs and confirms on the customs application list after successful verification and notifies the logistics node of the exporter;

step S38: the logistics node of the exporter starts transportation after receiving the notification, generates a transportation single signature, and records the transportation single signature on the blockchain and notifies the node of the exporter;

step S39: after receiving the notice, the exporter node checks the data on the blockchain, and then signs and confirms the data on the transport sheet.

Further, the step S3 further includes the following steps between the step S33 and the step S34:

step S33a: the exporter insurance company node generates a policy according to the quantity and quality of the goods, the signature confirmation is recorded on the blockchain and is sent to the exporter node, and the exporter node checks the signature confirmation after error.

Further, the step S4 specifically includes the following steps:

step S41: after the goods are transported out, the exporter node sends a solicited notification to the bargained line node, and the bargained line node inspects documents on the blockchain, including a bill of lading, a insurance policy, a check policy and a customs clearance, and transfers remittance to the exporter node after the consistency of the bill and the consistency of the bill are confirmed;

step S42: oracle records the transfer record of the money transfer from the pay-through node to the exporter node on the blockchain, and the exporter node confirms the signature of the transfer record;

step S43: the bargained line node sends out a compensation notice to the payment line, and the payment line transmits remittance to the bargained line node after confirming that the bill is correct;

step S44: oracle records the transfer records of the money transfer from the payline node to the bargained line node on the blockchain, and the bargained line node confirms the signature of the transfer records;

step S45: the payment line node sends out a compensation notice to the issuing line node, and the issuing line node transfers remittance to the payment line node after confirming that the bill is correct;

step S46: oracle records the transfer records of the issuer node to the payor node, and the payor node signature confirms the transfer records.

Further, the step S5 specifically includes the following:

step S51: when the goods reach the customs node of the importer, the logistics node of the exporter notifies the importer node to apply for customs reporting;

step S52: the importer node deploys an import customs clearance form on the blockchain, and the signature is confirmed and recorded on the blockchain;

step S53: the importer business inspection office node checks goods, records the goods after checking the qualified certificate signature of the goods, and verifies the signature of the importer business inspection office node to confirm the signature after confirming the signature of the importer business inspection office node is correct;

step S54: checking goods and documents by the customs node of the importer, signing and confirming on a customs application form after verification is passed, and notifying the logistics node of the importer;

step S55: after receiving the goods verification from the logistics node of the outlet party, the logistics node of the inlet party signs and confirms on the bill of lading and records the bill of lading on the blockchain and sends a notice to the node of the importer;

step S56: after verifying that the bill on the blockchain is correct, the importer node sends a payment notice to the issuing bank node and transfers remittance to the issuing bank node;

step S57: the Oracle node records the transfer record of the money transfer from the importer node to the issuing bank node to the blockchain, and the issuing bank node confirms the signature of the transfer record;

step S58: the importer node sends a notice of goods extraction to the importer logistics node, and the importer logistics node checks the transfer record of the importer node and then notifies the importer node of goods taking;

step S59: the importer node extracts goods from the importer logistics node and signs and confirms the goods on the bill of lading.

Further, the method also comprises the following steps:

step S6: checking whether the buyer and the seller have the default behavior in the transaction process, and if the default exists, adding the information of the default party into a blacklist and recording the information on a blockchain.

The present application also provides a computer readable storage medium storing a computer program for blockchain-based import provisioning, which when run on a computer performs the steps of the blockchain-based import provisioning method as described above.

The application has the following beneficial effects:

the method for issuing the import based on the blockchain comprehensively utilizes the asymmetric encryption technology, the intelligent contract technology, the hash algorithm, the digital signature and the identity authentication in the blockchain, simplifies the transaction execution process of issuing the import, reduces the default and fraud possibility of both import and export parties, solves the trust and risk problems in payment and delivery, improves the trust degree of both transaction parties, reduces the risk born by banks, improves the transaction safety, reduces the fund occupation, improves the cash flow and realizes faster, safe and reliable trade activities.

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 business structure diagram of import opening in a conventional international trade model.

Fig. 2 is a traffic structure diagram of a blockchain-based import accounting method in accordance with the preferred embodiment of the present application.

FIG. 3 is a schematic diagram of a network deployment of multi-party nodes involved in a blockchain network of a blockchain-based method of import accounting in accordance with the preferred embodiments of the present application.

FIG. 4 is a flow chart of a method for blockchain-based import accounting in accordance with the preferred embodiment of the present application.

Fig. 5 is a schematic flow chart of step S1 in fig. 4 according to a preferred embodiment of the present application.

Fig. 6 is a schematic sub-flow diagram of step S2 in fig. 4 in accordance with a preferred embodiment of the present application.

Fig. 7 is a schematic flow chart of step S3 in fig. 4 according to a preferred embodiment of the present application.

Fig. 8 is a schematic flow chart of step S4 in fig. 4 according to a preferred embodiment of the present application.

Fig. 9 is a schematic sub-flow chart of step S5 in fig. 4 according to a preferred embodiment of the present application.

Detailed Description

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

For ease of understanding, as shown in fig. 2 and 3, the multi-party nodes involved in blockchain-based methods of import invoicing are explained below.

(1) Oracle (prophetic): a platform for providing external information, which can allow the blockchain to be connected to any existing API (Application Programming Interface application program interface), and can import, store and export information about network nodes on the blockchain, so as to realize dynamic acquisition of the information;

(2) importer (applicant) node: the applicant (applicant) refers to a party who requires a credit card to be opened, and in international trade, is usually a buyer (importer), and the applicant applies for the credit card to an exchange bank according to payment conditions established by a purchase and sale contract.

(3) Issuing bank node: an issuing bank refers to a bank that issues a credit card on behalf of or on behalf of an applicant, and is usually an importation bank, and has a first payment responsibility, so that the issuing bank plays the most important role in a documentary credit card transaction.

(4) Payment line node: it is a payment bank designated on the credit card, and the payment bank (paybank) is usually the ticket taker of the draft, so is also called the ticket taker, which is usually referred to as the issuing bank, or another bank designated, and is determined according to the rules of the credit card.

(5) Exporter (beneficiary) node: beneficiaries (beneficiaries) refer to those who receive a credit card and enjoy their benefits. In general, the beneficiary is mostly a seller or an exporter who has the right to use or enjoy the benefits of the credit card, and is called a beneficiary.

(6) The notification line node: the issuing bank notifies the bank of the exporter of the credit card, which is usually the exporting bank, according to the requirement of the issuing bank, and the issuing bank can directly mail the beneficiary of the credit card, but the bank verifies the authenticity of the credit card by virtue of seal and mortgage relationship, thereby being beneficial to protecting the rights and interests of the beneficiary, so most of the credit card is notified by the issuing bank.

(7) The pay line node: by a receipt is meant an act of a bargained bank (bargained bank) under a conforming receipt, prepaying or agreeing to prepaid goods to the beneficiary on or before the day of the bank's business that it should receive the payment, thereby purchasing a draft and/or bill, and additionally, the draft payer must be a bank, but cannot be made to act as a payer for the bargained bank.

(8) Third party credit bureau node: and the agency system is used for collecting enterprise and personal information and providing enterprise and personal information inquiry, rating and inquiry services for enterprise and personal information users and independently operating agency persons according to the approval of related laws and regulations.

(9) Exporter insurance company node: the importer is pointed out to a company that provides insurance services for goods transportation and the like.

An exporter business inspection bureau node: the detecting mechanism indicates that the importer is responsible for checking whether the commodity meets the export requirement.

Export customs node: the customs of the consignment party is responsible for auditing the mechanisms for verifying the delivery of the goods and collecting tariffs and other tax fees.

Export side logistics node: the method indicates that the importer at least engages in transportation (including transportation agency and goods express) or storage as an operation business, and can organize and manage basic functions of transportation, storage, loading and unloading, packaging, circulation processing, distribution and the like according to the logistics requirements of clients, and the method has an information management system which is suitable for self business, and implements independent accounting and independent economic organization for bearing civil responsibility.

Importer business inspection bureau node: the finger importer is responsible for checking whether the commodity meets the detection mechanism of import requirements.

Importer customs node: the customs of the importer is responsible for auditing and checking the mechanism of issuing passes for goods.

Entering side logistics node: the finger-entering party at least engages in transportation (including transportation agency and goods express) or storage as an operation business, and can organize and manage basic functions of transportation, storage, loading and unloading, packaging, circulation processing, distribution and the like according to the logistics requirements of clients.

As shown in FIG. 4, the preferred embodiment of the present application provides a blockchain-based method of import provisioning, comprising the steps of:

In this embodiment, the method for issuing the import opening based on the blockchain comprehensively utilizes the asymmetric encryption technology, the intelligent contract technology, the hash algorithm, the digital signature and the identity authentication in the blockchain, simplifies the transaction execution process of the import opening, reduces the possibility of default and fraud of both import and export parties, solves the trust and risk problems in payment and delivery, improves the trust degree of both transaction parties, reduces the risk born by banks, improves the security of transactions, reduces the occupation of funds, improves the cash flow, and realizes faster, safe and reliable trade activities.

It will be appreciated that, as shown in fig. 5, the step S1 specifically includes the following:

step S13: the export business node requests to the third party credit investigation organization node to confirm the operation condition and credit investigation condition of the import business node to be cooperated, and the third party credit investigation organization node generates a credit investigation condition table of the import business node, records the signature confirmation on the blockchain and sends the record to the export business node;

step S14: after the exporter node confirms that the business can cooperate, the exporter node verifies that the signature of the importer node is correct and then confirms the signature on the intentional book of cooperation;

step S15: after the importer node and the exporter node are subjected to intentional negotiation, the importer node deploys trade contracts on the blockchain, and after signature confirmation, the importer node is sent to and recorded on the blockchain;

It will be appreciated that in step S1, the importer node uses the private key for signature verification, and the exporter node uses the importer node 'S public key for verification of the importer node' S signature.

It will be appreciated that, as shown in fig. 6, the step S2 specifically includes the following:

step S21: the importer node sends an application for import accounting to an accounting node within the time specified by the trade contract, specifically: deploying an issuing application form on the blockchain, carrying out signature confirmation, and simultaneously transmitting company rules, financial reports and import contracts to issuing nodes and recording the issuing nodes on the blockchain;

step S23: the issuing bank node applies for checking other information of the importer node outside the blockchain to the Oracle, including tax, borrowing conditions, credit grades and the like, and the Oracle generates a qualification table of the importer node, sends the qualification table to the issuing bank node and records the qualification table on the blockchain;

step S26: the issuing bank node issues a credit card for the issuing bank node according to the issuing application form of the importer node and the importer contract and the like, and the issuing bank node signs and confirms the deposit card and records the deposit card on the blockchain;

It will be appreciated that, as shown in fig. 7, the step S3 specifically includes the following:

step S31: after goods are prepared, the export business node generates files such as an export contract, an export business invoice, a packing list and the like, signature confirmation is recorded on the blockchain, the importer node is informed of the files, and the importer node checks the files to confirm the signature, wherein the related information such as the export contract, the export business invoice, the packing list and the like is linked to the credit card on the blockchain, so that the subsequent checking and checking are facilitated;

step S32: the export business node deploys a commodity inspection application form on the blockchain, and sends the commodity inspection application form to the export business office node after signature confirmation and records the commodity inspection application form on the blockchain, wherein the commodity inspection application form is linked to the credit card, so that the subsequent examination and check are facilitated;

step S33: after confirming that the commodity inspection is qualified, the node of the export commodity inspection bureau signs the signature of the commodity inspection application form, issues a commodity inspection qualified certificate, records the signature on the blockchain and informs the node of the export commodity;

step S34: the exporter node deploys a consignment contract on the blockchain, the exporter node sends out an exporter logistics node after signature confirmation and records the export logistics node on the blockchain, and the exporter logistics node checks the signature of the exporter node to confirm that the signature is correct, wherein the consignment contract is linked to the credit card;

step S35: after receiving goods, the exporter logistics node generates a bill of lading signature confirmation, records the bill of lading signature confirmation on a blockchain and sends the bill of lading signature confirmation to the exporter node, and the exporter node verifies the signature of the exporter logistics node and confirms the signature confirmation after the signature of the exporter logistics node is correct, wherein the bill of lading is linked to the credit card on the blockchain;

step S36: before shipment, the logistics node of the exporter notifies the node of the exporter to apply for customs clearance, the node of the exporter deploys a customs clearance application form on the blockchain after receiving the notification, the signature confirmation is recorded on the blockchain and is sent to the customs node of the exporter, and the customs clearance application form is linked to the credit card;

step S38: the export logistics node starts transportation after receiving the notification, generates a transportation bill signature, confirms the transportation bill, records the transportation bill signature on a blockchain and notifies the export logistics node, and the transportation bill is linked to the credit card;

It will be appreciated that, as a preferred option, the step S3 further includes the following steps between the step S33 and the step S34:

step S33a: the exporter insurance company node generates a policy according to the quantity and quality of goods, the signature confirmation is recorded on the blockchain and is sent to the exporter node, the exporter node checks the signature confirmation after error, and the policy is linked to the credit card.

It will be appreciated that, as shown in fig. 8, the step S4 specifically includes the following steps:

step S42: oracle records the transfer records of the money transfer from the pay-through node to the exporter node on a blockchain, the exporter node carries out signature confirmation on the transfer records, and the transfer records of the money transfer from the pay-through node to the exporter node are linked to the credit card, so that the importer node can check and check conveniently;

step S44: oracle records the transfer records of the payor node sending money to the bargained row node onto the blockchain, the bargained row node confirms the signature of the transfer records, and the transfer records of the payor node sending money to the bargained row node are linked to the credit card;

step S46: oracle records onto the blockchain the transfer records of the issuer node sending funds to the issuer node, the issuer node signature confirms the transfer records, and the transfer records of the issuer node sending funds to the issuer node are linked to the LC.

It will be appreciated that, as shown in fig. 9, the step S5 specifically includes the following:

step S52: the importer node deploys an import customs clearance form on the blockchain, and the signature is confirmed and recorded on the blockchain, wherein the import customs clearance form is linked to the credit card;

step S53: the importer business inspection office node checks goods, records the product inspection qualified certificate signature confirmation on a blockchain, and verifies the sign of the importer business inspection office node to confirm the signature after the sign of the importer business inspection office node is correct, wherein the product inspection qualified certificate is linked to the credit card;

step S57: the Oracle node records the transfer record of the money transfer from the importer node to the issuing bank node onto the blockchain, the issuing bank node confirms the signature of the transfer record, and the transfer record of the money transfer from the importer node to the issuing bank node is linked to the credit card;

It will be appreciated that, preferably, the blockchain-based import evidence method further comprises the steps of:

step S6: checking whether the buyer and the seller have default behavior in the transaction process, if so, adding the information of the default party into a blacklist and recording the information on a blockchain, thereby improving the trust degree of the import and export parties and protecting the credit of the bank.

Compared with the existing import evidence manner, the method for conducting import evidence based on blockchain has the following advantages:

all information on an industrial chain in the whole import and development process is completely published on the chain by using a blockchain technology, and through a consensus mechanism and repeated confirmation of a plurality of key nodes, the true transparency and the whole-course integrity of the information are improved, the non-falsifiability and the non-falsification of the information are ensured, and the bank credit risk caused by the credit and debit problems of both sides of a bank is reduced.

The blockchain provides an automatic transaction processing system for distributed accounting and intelligent contract script technology, replaces the processes of examination sheets, making sheets, telegrams, mailing and the like of a great deal of manpower and time occupied in the traditional settlement process, and greatly improves the efficiency of international trade.

In the traditional mode, different entities respectively store respective information, each system has information island, the transparency of the information is seriously insufficient, high time cost and money cost are caused, once problems (default, fraud and other actions) occur on import and export parties, the problems are difficult to track and process, and at the moment, banks face the risks of funds and credit. Firstly, a chain is made by using a block chain technology, namely, all important participating nodes form a alliance chain; and then the transaction information of all participating subjects is uplink, so that the whole transaction process is transparent, the security and the efficiency of the transaction are improved, the trust degree among the participating subjects can be deepened, and the trust mechanism in international trade is remodeled; finally, using a chain, the transaction record and the history inquiry are conveniently carried out in the whole trade process.

By applying the technology of combining the blockchain and the intelligent contract, the document transmission and auditing process is simplified, the labor, material, financial and time costs are saved, and a plurality of complicated processes in the middle of international trade are simplified; the default and fraud possibility of both import and export parties are reduced, the trust and risk problems in payment and delivery are solved, and the trust degree of both transaction parties is improved; the risk born by the bank is reduced, and the credit of the bank is protected; the fund occupation is reduced; the cash flow is improved, so that the whole trade financing process is faster, safer and more intelligent.

It will be appreciated that the second embodiment of the present application also provides a computer readable storage medium storing a computer program for blockchain-based import evidence, which when run on a computer performs the steps of the blockchain-based import evidence method 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 application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for issuing import based on blockchain is characterized in that,

the method comprises the following steps:

step S5: carrying out trade payment activity based on the request of the buyer, after confirming that the bill related to the credit card is correct, the buyer pays goods based on trade contract, recording the certificate of goods payment on a blockchain and linking the certificate to the credit card, and finally carrying out goods withdrawal clearing activity based on the request of the buyer;

the step S1 specifically includes the following:

step S16: the exporter node verifies the signature of the importer node to confirm the signature after confirming the trade contract;

the step S2 specifically includes the following:

step S28: the notice line node sends the credit card to the carrier node and records the credit card on the blockchain, the carrier node compares and checks the credit card with the signed trade contract content, and the signature is confirmed after the confirmation is correct;

the step S3 specifically includes the following:

step S39: after receiving the notice, the exporter node checks the data on the blockchain, and then signs and confirms the data on the transport bill;

the step S4 specifically includes the following steps:

step S46: oracle records the transfer records of the money transfer from the issuer node to the payer node on the blockchain, and the payer node confirms the signature of the transfer records;

the step S5 specifically includes the following:

2. The method for conducting import opening based on blockchain of claim 1,

in the step S1, the importer node uses the private key to perform signature verification, and the exporter node uses the public key of the importer node to verify the signature of the importer node.

3. The blockchain-based import provisioning method of claim 1, wherein:

the step S3 further includes the following steps between the step S33 and the step S34:

4. The method for conducting import opening based on blockchain of claim 1,

the method also comprises the following steps:

5. A computer readable storage medium storing a computer program for blockchain-based import validation, wherein the computer program when run on a computer performs the steps of the blockchain-based import validation method of any of claims 1-4.