CN113034149A - System and method for confirming electronic invoice and guaranteeing performance based on block chain - Google Patents
System and method for confirming electronic invoice and guaranteeing performance based on block chain Download PDFInfo
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Abstract
The invention discloses a system and a method for confirming and guaranteeing electronic invoices and performing contract based on a block chain, providing blank electronic invoice to the host computer of the seller through the host computer of the authorization end, and when the transaction is carried out, the buyer host, the seller host or the intermediary host issues corresponding escrow transaction contract in the blockchain network so as to receive payment evidence transmitted by the buyer host by the escrow transaction contract, and receiving the asset/service certificate and blank electronic invoice certificate transmitted by the host computer of the seller, when the transaction is confirmed to be correct, the payment pass certificate is transmitted to the host computer at the seller end, the asset/service pass certificate is transmitted to the host computer at the buyer end, and writing the transaction message into the blank electronic invoice certificate as the electronic invoice certificate to be transmitted to the host computer of the buyer end so as to achieve the technical effects of improving the authenticity of the invoice recorded content and verifying the convenience.
Description
Technical Field
The invention relates to a system and a method for integrating electronic invoices and escrow, in particular to a system and a method for confirming electronic invoices and guaranteeing performance based on a block chain.
Background
In recent years, with the popularization and vigorous development of electronic transactions, various electronic invoice systems have appeared like spring shoots after rain. However, how to ensure that the transaction information recorded in the invoice matches the actual transaction content has always been one of the problems that manufacturers want to solve.
Generally, a blank electronic invoice needs to be applied to a government authorized unit (such as a tax check authority) in advance, and after selling goods or services, a seller writes transaction contents into the blank electronic invoice and delivers the transaction contents to a buyer. However, since the transaction content written into the electronic invoice may not be consistent with the actual transaction content, for example: low-report transaction amounts, false transactions, etc. Therefore, there is a problem that authenticity of the invoice contents is difficult to verify.
In view of the above, manufacturers propose a technical means for auditing transactions, which integrates an accounting system to audit whether there is a false account, and if there is such a situation, the transaction information recorded in the invoice may be inconsistent with the actual transaction content. However, this method cannot avoid human intervention, and therefore, the problem that the authenticity of the invoice recorded content is difficult to verify still cannot be effectively solved.
As described above, it is known that the authenticity of the invoice contents has been difficult to verify in the prior art, and thus there is a need for an improved technical solution to solve the problem.
Disclosure of Invention
The invention discloses a block chain-based electronic invoice validation and performance guarantee system and a block chain-based electronic invoice validation and performance guarantee method.
The invention discloses a block chain-based electronic invoice validation and performance guarantee system, which is applied to a block chain network consisting of a plurality of node hosts, and comprises the following components: an authorization end host, a seller end host and a buyer end host. In the part of the authorized end host, which is one of the node hosts, comprising: the device comprises an initial module and a generation module. The initial module is used for issuing an authorized invoice contract in advance on the blockchain network during initialization, wherein the authorized invoice contract comprises a blank invoice generating function; the generation module is connected with the initial module and used for executing a blank invoice generation function to generate a plurality of blank electronic invoice certificates when receiving an invoice request, and transmitting the generated blank electronic invoice certificates according to a source address of the invoice request, wherein the blank electronic invoice certificates allow writing in transaction information.
The part of the host at the vendor end, which is one of the node hosts, comprises: a certificate passing module and a transaction module. The system comprises a certification module, an authorization end host and a certification module, wherein the certification module is used for providing a plurality of asset/service certificates and transmitting an invoice request to obtain blank electronic invoice certificates from the authorization end host; the transaction module is connected with the certification module and is used for transmitting one of the asset/service certification and the blank electronic invoice certification of the corresponding transaction to the escrow transaction contract after the escrow transaction contract is successfully issued.
Then, in the buyer-side host, which is one of the node hosts, the buyer-side host is used for transmitting the payment evidence of the corresponding transaction to the escrow transaction contract after the escrow transaction contract is successfully issued. When transaction is carried out, a buyer end host, a seller end host or an intermediary end host as one of the node hosts issues a corresponding escrow transaction contract, a transaction message corresponding to the transaction is set in the escrow transaction contract, and after the delivery condition of the escrow transaction contract is met, an exchange function of the escrow transaction contract is triggered and executed, so that the exchange function transmits an asset/service evidence in the escrow transaction contract to the buyer end host, transmits a payment evidence to the seller end host, writes the transaction message into a blank electronic invoice evidence as the electronic invoice evidence, and transmits the electronic invoice evidence to the buyer end host.
In addition, the invention discloses a block chain-based electronic invoice validation and performance guarantee method, which is applied to a block chain network consisting of a plurality of node hosts and comprises the following steps: at the beginning, an authorized end host which is one of the node hosts issues an authorized invoice contract in advance in the blockchain network, wherein the authorized invoice contract comprises a blank invoice generating function; providing a plurality of asset/service certificates by a seller host which is one of the node hosts, and transmitting an invoice request to an authorization host; when receiving an invoice request, the authorization end host executes a blank invoice generating function to generate a plurality of blank electronic invoice certificates, and transmits the generated blank electronic invoice certificates to the seller end host, wherein the blank electronic invoice certificates allow writing in transaction information; when transaction is carried out, a buyer-side host, a seller-side host or an intermediary-side host which is one of the node hosts issues a corresponding escrow transaction contract in the block chain network, and a transaction message corresponding to the transaction is set in the escrow transaction contract; after the escrow transaction contract is successfully issued, the seller-end host transmits one of the asset/service evidence and the blank electronic invoice evidence corresponding to the transaction to the escrow transaction contract, and the buyer-end host transmits the payment evidence corresponding to the transaction to the escrow transaction contract; when the delivery condition in the escrow transaction contract is met, triggering and executing an exchange function of the escrow transaction contract, enabling the exchange function to transmit the asset/service evidence in the escrow transaction contract to the buyer side host computer, transmit the payment evidence to the seller side host computer, write the transaction message into a blank electronic invoice evidence as the electronic invoice evidence, and transmit the electronic invoice evidence to the buyer side host computer.
The system and the method disclosed by the invention have the difference from the prior art that the invention provides a blank electronic invoice voucher to the seller host through the authorization host, and when in transaction, the buyer host, the seller host or the intermediary host issues a corresponding escrow transaction contract in a block chain network so as to receive the payment voucher transmitted by the buyer host and receive the asset/service voucher and the blank electronic invoice voucher transmitted by the seller host, when the transaction is confirmed to be correct, the payment voucher is transmitted to the seller host, the asset/service voucher is transmitted to the buyer host, and the transaction message is written into the blank electronic invoice voucher as the electronic invoice voucher to be transmitted to the buyer host.
Through the technical means, the invention can achieve the technical effects of improving the authenticity of the invoice recorded content and verifying the convenience.
Drawings
FIG. 1 is a system block diagram of the present invention block chain based electronic invoice validation and performance assurance system.
Fig. 2A and 2B are flow charts of the block chain-based method for electronic invoice validation and performance assurance according to the present invention.
FIG. 3 is a schematic diagram of an application of the present invention for requesting invoices to obtain a blank electronic invoice voucher.
FIG. 4 is a schematic diagram of an application of the present invention for conducting an escrow transaction and invoicing.
Fig. 5A and 5B are schematic diagrams illustrating a return transaction and an invoice cancellation using the present invention.
Description of reference numerals:
100 blockchain network
110 authorization end host
111 initial module
112 generation module
Host computer of 120 vendor
121 pass certificate module
122 transaction module
130 buyer side host
140 intermediary host
300 invoice please see-back window
311 display Block
312 input block
313 please lead the key-press
400 transaction window
411. 412 input block
420 Purchase button
430 display block
440 confirm payment button
500 Return window
511-513 input block
514 return key
550 consent form
551 display area
552 consent return button
Detailed Description
The embodiments of the present invention will be described in detail with reference to the drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
Before describing the system and method for confirming and ensuring electronic invoices based on blockchain disclosed by the invention, terms defined by the invention are described, and the 'authorized invoice Contract' and the 'escrow return Contract' both refer to an intelligent Contract (Smart Contract) issued (Deploy) on a blockchain network. In practice, the intelligent contract refers to a computer program that drives instructions according to predetermined conditions and transmitted information, and specifically, the intelligent contract is implemented by a programming language such as: the intelligent contracts are compiled to obtain Binary codes and Application Binary Interfaces (ABIs) so as to broadcast the intelligent contracts to a block chain network, wait for miners (Miner) or verifiers (validators) to put the intelligent contracts on the block chain and obtain corresponding addresses (or called as contracts), and then complete the issuing of the intelligent contracts through block chain transaction. Then, each node host executes the corresponding intelligent contract according to the address, and changes the state of the intelligent contract on the block chain and detects whether the event is triggered or not by different instructions. In addition, the "blank electronic invoice voucher", "asset/service voucher", and "payment voucher" and so on refer to a "voucher" (Token) or so called "Token" running on the blockchain network.
Referring to fig. 1, fig. 1 is a block diagram of a system for confirming and ensuring electronic invoices and performing contract based on a block chain according to the present invention, which is applied to a block chain network 100 composed of a plurality of node hosts, and the system includes: an authorized host 110, a seller host 120 and a buyer host 130. It should be noted that, since the invoicing requires government authorization, the authorized end host 110 is referred to as a node host provided by a government entity or a node host authorized by the government entity. The node host refers to a computer device with a network function, such as: personal computers, notebook computers, servers, etc. and are interconnected in a point-to-point (Peer-to-Peer, P2P) manner to form a blockchain network 100. the blockchain network 100 may be a Bitcoin (bitcoil) blockchain network, an ethernet (Ethereum) blockchain network, or other similar blockchain networks.
Specifically, in the portion of the authorizing end host 110 that serves as one of the node hosts, the authorizing end host 110 includes: an initial module 111 and a generation module 112. The initialization module 111 is configured to issue an authorized invoice contract in advance in the blockchain network 100 at the initialization time, where the authorized invoice contract includes a blank invoice generation function. In practical implementations, executing this blank invoice generation function may result in a blank electronic invoice voucher containing invoice writing to the enterprise or organization that is to issue the invoice, i.e., the blank electronic invoice voucher is a non-homogenous voucher, having a unique identification code and containing invoice writing.
The generating module 112 is connected to the initial module 111, and configured to execute a blank invoice generating function to generate a plurality of blank electronic invoice certificates when receiving an invoice request, and transmit the generated blank electronic invoice certificates according to a source address of the invoice request, where the blank electronic invoice certificates allow writing of transaction messages. For example, assuming that the source address of the invoice request is "0 xad1 …", the generation module 112 will transmit the generated blank electronic invoice voucher to the address, and allow the host owning the address (i.e., the seller host 120) to write the transaction message into one of the blank electronic invoice vouchers as an electronic invoice voucher with the transaction message when performing a transaction.
Part of the vendor host 120, which is one of the node hosts, and comprises: a certification module 121 and a transaction module 122. The certification module 121 is configured to provide a plurality of asset/service certificates and transmit an invoice request to obtain a blank electronic invoice certificate from the authorized end host 110. In practical implementation, the asset/service certification and the blank electronic invoice certification can be implemented by the "ERC 721" standard, that is, the certification running on this blockchain network 100 is established in an intelligent contract and can be transferred through blockchain transactions. In addition, assuming that the transaction is to be returned, the seller host 120, the buyer host 130 or the intermediary host 140 may issue a escrow return contract corresponding to the return transaction in the blockchain network 100, and set a return message corresponding to the return transaction in the escrow return contract, the escrow return contract allowing the buyer host 130 to transmit the asset/service pass and the corresponding electronic invoice pass to the escrow return contract when the return message is confirmed to be correct, and transmit the payment pass to the escrow return contract when the return message is confirmed to be correct by the seller host 120, and when the return condition in the escrow return contract is satisfied, trigger a return function of the escrow return contract to transmit the asset/service pass to the seller host 120, embed a cancellation message in the electronic invoice pass, and transmit the payment pass to the buyer host 130, the return condition is satisfied when the asset/service voucher, the payment voucher, and the electronic invoice voucher match the return message, and the return function is automatically triggered to be executed, or the buyer host 130, the seller host 120, or the intermediary host 140 is allowed to trigger the return function. In addition, if the buyer host 130 cancels the return or the seller host 120 detects that the asset/service certificate and the corresponding electronic invoice certificate in the escrow return contract are wrong, the return function can be executed to transmit the asset/service certificate and the electronic invoice certificate in the escrow return contract to the buyer host 130 and transmit the payment certificate in the escrow return contract to the seller host 120. In fact, the payment pass can be regarded as a pass with a delayed redemption function like a bond, a check, a request for money, a redemption basis, etc.
The transaction module 122 is connected to the certification module 121, and is configured to transmit one of the asset/service certification and the blank electronic invoice certification of the corresponding transaction to the escrow transaction contract after the escrow transaction contract is successfully issued. In other words, during the transaction process, the seller host 120 detects that the escrow transaction contract is successfully issued, and then escrows the sold asset/service certificate to the escrow transaction contract, instead of directly transmitting the sold asset/service certificate to the buyer host 130. In actual practice, detecting whether a escrow transaction contract was successfully issued may be accomplished by detecting whether its contract address exists.
Then, as part of the buyer-side host 130, also serving as one of the node hosts, the buyer-side host 130 is configured to transmit a payment pass for the corresponding transaction to the escrow transaction contract after the escrow transaction contract is successfully issued. In practical implementation, the payment voucher may be not only the voucher with the delayed redemption function, but also a currency voucher with value, such as: used as currency general evidence.
Specifically, when a transaction is performed, the buyer host 130, the seller host 120 or the intermediary host 140, which is one of the node hosts, issues a corresponding escrow transaction contract, and sets a transaction message corresponding to the transaction in the escrow transaction contract, where the transaction message may include: invoice information, seller and buyer identity (such as account address), delivered asset/service, buyer's payment content (such as currency and amount paid), etc. When the delivery condition of the escrow transaction contract is met, an exchange function for executing the escrow transaction contract is triggered, so that the exchange function transmits the asset/service evidence in the escrow transaction contract to the buyer side host 130, transmits the payment evidence to the seller side host 120, writes the transaction message into a blank electronic invoice evidence as the electronic invoice evidence, and transmits the electronic invoice evidence to the buyer side host 130. In practice, when the transaction contract is correct, the delivery condition is satisfied, and the transaction message, the received asset/service certificate and the payment certificate are automatically triggered to execute the swap function, or the buyer host 130, the seller host 120 or the broker host 140 is allowed to trigger the swap function. In addition, if the seller host 120 cancels the transaction or the buyer host 130 detects a transaction error, the exchange function of the escrow transaction contract can be executed to transmit the asset/service certificate and the blank electronic invoice certificate in the escrow transaction contract to the seller host 120 and the payment certificate in the escrow transaction contract to the buyer host 130.
In particular, in practical implementation, each module described in the present invention can be implemented by various manners, including software, hardware, or any combination thereof, for example, in some embodiments, each module can be implemented by software, hardware, or any combination thereof, and besides, the present invention can also be implemented partially or completely by hardware, for example, one or more modules in a System can be implemented by an integrated circuit Chip, a System on Chip (SoC), a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), or the like. The present invention may be a system, method and/or computer program. The computer program may include a computer readable storage medium having computer readable program instructions embodied thereon for causing a processor to implement various aspects of the present invention, the computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: hard disk, random access memory, read only memory, flash memory, compact disk, floppy disk, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical signals through a fiber optic cable), or electrical signals transmitted through a wire. Additionally, the computer-readable program instructions described herein may be downloaded to the various computing/processing devices from a computer-readable storage medium, or over a network, for example: the internet, a local area network, a wide area network, and/or a wireless network to an external computer device or an external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, hubs and/or gateways. The network card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device. The computer program instructions which perform the operations of the present invention may be combinatorial language instructions, instruction set architecture instructions, machine dependent instructions, microinstructions, firmware instructions, or Object Code (Object Code) written in any combination of one or more programming languages, including an Object oriented programming language, such as: common Lisp, Python, C + +, Objective-C, Smalltalk, Delphi, Java, Swift, C #, Perl, Ruby, and PHP, etc., as well as conventional Procedural (Procedural) programming languages, such as: c or a similar programming language. The computer-readable program instructions may execute entirely on the computer, partly on the computer, as stand-alone software, partly on a client computer and partly on a remote computer or entirely on the remote computer or server.
Referring to fig. 2A and 2B, fig. 2A and 2B are flowcharts of a method for block chain-based electronic invoice validation and performance assurance according to the present invention, which is applied to a block chain network 100 composed of a plurality of node hosts, and includes the steps of: initially, an authorized end host 110 as one of the node hosts issues an authorized invoice contract in advance in the blockchain network 100, wherein the authorized invoice contract includes a blank invoice generating function (step 210); providing a plurality of asset/service certificates by the vendor host 120, which is one of the node hosts, and transmitting an invoice request to the authorizing host 110 (step 220); the authorizing end host 110, upon receiving the invoice requisition request, executes a blank invoice generating function to generate a plurality of blank electronic invoice vouchers, and transmits the generated blank electronic invoice vouchers to the seller end host 120, wherein the blank electronic invoice vouchers allow writing of transaction messages (step 230); when a transaction is conducted, the buyer host 130, the seller host 120 or the intermediary host 140, which is one of the node hosts, issues a corresponding escrow transaction contract in the blockchain network 100, and sets a transaction message corresponding to the transaction in the escrow transaction contract (step 240); after the escrow transaction contract is successfully issued, the seller host computer 120 transmits one of the asset/service pass and the blank electronic invoice pass corresponding to the transaction to the escrow transaction contract, and the buyer host computer 130 transmits the payment pass corresponding to the transaction to the escrow transaction contract (step 250); when the delivery condition in the escrow transaction contract is satisfied, an exchange function for executing the escrow transaction contract is triggered, so that the exchange function transmits the asset/service evidence in the escrow transaction contract to the buyer side host 130, transmits the payment evidence to the seller side host 120, writes the transaction message into a blank electronic invoice evidence as the electronic invoice evidence, and transmits the electronic invoice evidence to the buyer side host 130 (step 260). Through the above steps, a blank electronic invoice certificate can be provided to the seller host 120 through the authorization host 110, and when a transaction is performed, the buyer host 130, the seller host 120 or the intermediary host 140 issues a corresponding escrow transaction contract on the blockchain network 100, so that the escrow transaction contract receives the payment certificate transmitted by the buyer host 130, and receives the asset/service certificate and the blank electronic invoice certificate transmitted by the seller host 120, when the transaction is confirmed to be correct, the payment certificate is transmitted to the seller host 120, the asset/service certificate is transmitted to the buyer host 130, and a transaction message is written into the blank electronic invoice certificate as the electronic invoice certificate to be transmitted to the buyer host 130.
In addition, after step 260, if the return transaction is to be performed, the seller host 120, the buyer host 130 or the intermediary host 140 may issue a escrow return contract in the blockchain network 100, and a return message corresponding to the return transaction is set in the escrow return contract, such as: to log out invoices, seller identities, buyer returned assets/services, seller returned payment contents, etc. (step 270); after the escrow return contract is successfully issued, the seller-side host computer 120 transmits the payment pass certificate to be returned to the escrow return contract when confirming that the return message is correct, and the buyer-side host computer 130 transmits the asset/service pass certificate and the corresponding electronic invoice pass certificate corresponding to the return transaction to the escrow return contract when confirming that the return message is correct (step 280); when the return condition in the escrow return contract is satisfied, a return function for executing the escrow return contract is triggered to transmit the asset/service pass certificate to the seller end host computer 120, and a cancellation message is embedded in the electronic invoice pass certificate, and a payment pass certificate is transmitted to the buyer end host computer 130, wherein the return condition is satisfied when the asset/service pass certificate, the payment pass certificate and the electronic invoice pass certificate all conform to the return message, and the return function is automatically triggered to execute or allow the buyer end host computer 130, the seller end host computer 120 or the intermediary end host computer 140 to trigger the return function (step 290). In this way, the seller host 120 can receive the sold asset/service pass and cancel the issued invoice, and the buyer host 130 recovers the paid payment pass, thereby implementing the return mechanism of both transaction parties (i.e., the seller host 120 and the buyer host 130).
Referring to fig. 3, fig. 3 is a schematic diagram illustrating an invoice obtained by applying the present invention to obtain a blank electronic invoice voucher. When the seller wants to request the blank electronic invoice, the invoice request window 300 shown in FIG. 3A can be opened by the seller host 120, and the account address (e.g., "0 x02a4ab …") of the seller host 120 shown in the display block 311 is determined to be correct. If the invoice is confirmed to be correct, the seller can enter the number of invoices to be requested (e.g. the value "500") in the input block 312, then click the request key 313 to generate a corresponding invoice request, and transmit the invoice request to the authorization host 110, so that the authorization host 110 executes a blank invoice generation function to generate a corresponding number of blank electronic invoice certificates, and the blank electronic invoice certificates are provided to the seller host 120 for invoice issuing.
Fig. 4 is a schematic diagram of the application of the present invention to conduct an escrow transaction and invoice, as shown in fig. 4. When the buyer wants to purchase goods or services from the seller, the buyer can open the transaction window 400 as illustrated in fig. 4 through the buyer host 130 to browse the related information of the goods or services to be purchased and the account address of the seller, and after confirming that there is no error, enter the amount to be purchased in the input block 411, and enter the payment certificate and amount for the transaction in the input block 412. When the input is completed, the click purchase button 420 proposes a transaction to the seller host 120, and at this time, the buyer host 130, the seller host 120 or the intermediary host 140 issues a custody transaction contract in the blockchain network 100, and sets a transaction message corresponding to the transaction in the custody transaction contract. After the escrow transaction contract is successfully issued, the buyer-side host 130 transmits a corresponding amount of payment credentials to the escrow transaction contract.
On the other hand, the seller host 120 also transmits one of the asset/service pass and the blank electronic invoice pass corresponding to the transaction to the escrow transaction contract after the escrow transaction contract is successfully issued. At this time, since both the buyer-side host 130 and the seller-side host 120 have transmitted the corresponding evidence of the transaction to the escrow transaction contract, the delivery condition of the escrow transaction contract is satisfied, the buyer-side host 130 may display the evidence-passing status in the escrow transaction contract in the display block 430 for the buyer to confirm, and after the buyer confirms that the result is correct, the buyer-side host 130 may click on the confirm-pay button 440 to trigger the exchange function executing the escrow transaction contract, so that the exchange function transmits the asset/service evidence in the escrow transaction contract to the buyer-side host 130, transmits the payment evidence in the escrow transaction contract to the seller-side host 120, and writes the transaction message in the escrow transaction contract into the blank electronic invoice evidence in the escrow transaction contract as the electronic evidence, and then transmits the electronic invoice evidence to the buyer-side host 130. Thus, the flow of transaction and invoice issuing is completed. It should be noted that, although the above example is to click the payment confirmation button 440 to trigger the exchange function of executing the escrow transaction contract, the invention is not limited thereto, and in fact, when the evidence transmitted by the buyer host 130 and the seller host 120 matches the transaction message, the exchange function of executing the escrow transaction contract can be automatically triggered without human confirmation and manual triggering.
As shown in fig. 5A and 5B, fig. 5A and 5B are schematic diagrams illustrating a return transaction and an invoice cancellation using the present invention. Assuming that the buyer wants to return the purchased goods or services, the seller may be informed that the seller host 120 issues a escrow return contract in the blockchain network 100, or the buyer issues the escrow return contract directly through the buyer host 130, or even the mediator host 140 issues the escrow return contract, and when issuing the escrow return contract, a return message corresponding to the return transaction is set therein. Taking the example of the buyer host 130 issuing the escrow return contract, the buyer can open the return window 500 illustrated in fig. 5A through the buyer host 130 to set the return message corresponding to the return transaction, for example, the payment pass to be received is set in the input block 511, the asset/service pass to be returned is set in the input block 512, and the electronic invoice pass to be returned is set in the input block 513. The buyer then clicks on the refund button 514 to issue a escrow refund contract with a refund message on the blockchain network 100. After the escrow return contract is successfully issued, the buyer host 130 will transmit the asset/service pass corresponding to the return transaction and the corresponding electronic invoice pass to the escrow return contract when confirming that the return message is correct. Alternatively, the seller may open the agreement window 550 illustrated in FIG. 5B through the seller host computer 120 and confirm the return message in the escrow return contract in display block 551, which displays the asset/service pass and electronic invoice pass sent by the buyer host computer 130 to the escrow return contract and the payment pass that the seller host computer 120 should return. When the seller confirms that there is no error, the consent return button 552 may be clicked to pass the payment to be returned to the escrow return contract. At this time, since both the buyer host 130 and the seller host 120 have transmitted the corresponding pass certificate to the escrow return contract, the return condition of the escrow return contract is satisfied, and the return function of the escrow return contract is automatically triggered to execute (besides the automatic triggering execution, the buyer host 130, the seller host 120 or the intermediary host 140 may also be allowed to trigger the execution), the asset/service pass certificate in the escrow return contract is transmitted to the seller host 120, and a cancellation message is embedded in the electronic invoice pass certificate, and the payment pass certificate in the escrow return contract is transmitted to the buyer host 130. Therefore, the flow of returning the transaction and cancelling the invoice is completed.
As is clear from the above description, the electronic invoice issued during the transaction and the electronic invoice cancelled during the return are both certified certificates running on the blockchain, so that the electronic invoice is difficult to forge, tamper, falsify and delete, i.e. the electronic invoice has high authenticity. Therefore, the method is very suitable for situations of financing, tax refunding, rewarding or donation and the like by using the electronic invoice. Taking the financing of the electronic invoice as an example, because the seller cannot arbitrarily issue the electronic invoice with random amount, the electronic invoice with the issued amount of N must have the corresponding buyer willing or paid the amount, so the financing can be performed as the receivable account confirmed by the buyer; then, taking refund as an example, since the electronic invoice is certified by the seller, the buyer is guaranteed to pay the fee listed by the electronic invoice, so that the refund can be performed according to the fee, and similarly, in the part of business tax or business tax administration tax, the electronic invoice can be directly used as the refund basis of the business tax or business tax administration tax because the electronic invoice is certified by the buyer and the seller; in addition, for example, in the case of exchange or donation, since the electronic invoice is verified by both the buyer and the seller, the unit receiving the electronic invoice does not worry about its validity. In other words, the common points of the above situations are electronic invoices with high authenticity, and therefore, the electronic invoices are applicable to the electronic invoices generated by the invention. On the other hand, since the blockchain has a decentralized characteristic, there is no need to manage the electronic invoices through one party, and the electronic invoices (including the cancelled electronic invoices) accumulated on the blockchain for a long time can be used for subsequent big data analysis, such as: sales analysis, stock analysis, or credit analysis, etc.
In summary, it can be seen that the difference between the present invention and the prior art is that the authorizing end host provides a blank electronic invoice voucher to the seller end host, and when transaction is carried out, the buyer-end host computer, the seller-end host computer or the intermediary-end host computer issues a corresponding escrow transaction contract in the blockchain network so as to receive the payment evidence transmitted by the buyer-end host computer by the escrow transaction contract, and receiving the asset/service certificate and blank electronic invoice certificate transmitted by the host computer of the seller, when the transaction is confirmed to be correct, the payment pass certificate is transmitted to the host computer at the seller end, the asset/service pass certificate is transmitted to the host computer at the buyer end, and writing the transaction message into the blank electronic invoice voucher as the electronic invoice voucher to be transmitted to the host computer of the buyer end, so that the technical means can solve the problems in the prior art, and further achieve the technical effects of improving the authenticity of the invoice recorded content and verifying the convenience.
Although the present invention has been described with reference to the foregoing embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A system for block-chain-based electronic invoice validation and performance guarantee, applied in a block-chain network composed of a plurality of node hosts, the system comprising:
an authorized end host as one of the node hosts, the authorized end host comprising:
an initial module, configured to issue an authorized invoice contract in advance in the blockchain network during initialization, where the authorized invoice contract includes a blank invoice generating function; and
the generating module is connected with the initial module and used for executing the blank invoice generating function to generate a plurality of blank electronic invoice certificates when receiving an invoice request, and transmitting the generated blank electronic invoice certificates according to the source address of the invoice request, wherein the blank electronic invoice certificates allow the writing of transaction information;
a vendor host as one of the node hosts, the vendor host comprising:
the evidence-passing module is used for providing a plurality of asset/service evidence-passing and transmitting the invoice request to obtain the blank electronic invoice evidence-passing from the authorization end host; and
the transaction module is connected with the evidence-passing module and is used for transmitting one of the asset/service evidence and the blank electronic invoice evidence of the corresponding transaction to the escrow transaction contract after the escrow transaction contract is successfully issued; and
the buyer end host computer is used for transmitting at least one payment evidence corresponding to the transaction to the escrow transaction contract after the escrow transaction contract is successfully issued;
when the transaction is carried out, the buyer end host, the seller end host or the intermediary end host as one of the node hosts issues the corresponding escrow transaction contract, the transaction message corresponding to the transaction is set in the escrow transaction contract, and after the delivery condition of the escrow transaction contract is met, the exchange function of the escrow transaction contract is executed, so that the exchange function transmits the asset/service evidence in the escrow transaction contract to the buyer end host, transmits the payment evidence to the seller end host, writes the transaction message into the blank electronic invoice evidence as the electronic invoice evidence, and then transmits the electronic invoice evidence to the buyer end host.
2. The system for block chain-based electronic invoice validation and performance assurance of claim 1, wherein upon a return-back transaction, a escrow return contract is issued over the block chain network by the seller host, the buyer host or the intermediary host, and a return message corresponding to the return-back transaction is set in the escrow return contract, the escrow return contract allowing the buyer host to transmit the asset/service pass and the corresponding electronic invoice pass to the escrow return contract upon confirming that the return message is absent, and the seller host to transmit the payment pass to the escrow return contract upon confirming that the return message is absent, the return function of the escrow return contract being executed upon satisfying the return condition in the escrow return contract for transmitting the asset/service pass to the seller host, and embedding a logout message in the electronic invoice voucher, and transmitting the payment voucher to the buyer side host, wherein the refund condition is satisfied when the asset/service voucher, the payment voucher and the electronic invoice voucher all conform to the refund message, and the refund function is automatically executed or the buyer side host, the seller side host or the intermediary side host is allowed to trigger the execution of the refund function.
3. The system for blockchain-based electronic invoice validation and performance assurance of claim 1, wherein the exchange function of the escrow transaction contract is executed when the seller host cancels a transaction or the buyer host detects a transaction error, for transmitting the asset/service clearance and the blank electronic invoice clearance in the escrow transaction contract to the seller host and for transmitting the payment clearance to the buyer host.
4. The system for block chain-based electronic invoice validation and performance assurance of claim 2, wherein the buyer host cancels a return or the seller host detects that the asset/service certificate and the corresponding electronic invoice certificate in the escrow return contract are wrong, the return function is executed to transmit the asset/service certificate and the electronic invoice certificate in the escrow return contract to the buyer host, and the payment certificate in the escrow return contract is transmitted to the seller host.
5. The system for block-chain based electronic invoice presentment and performance assurance of claim 1, wherein the escrow transaction contract satisfies the delivery condition after all of the transaction message, the received asset/service pass-through and the payment pass-through are correct, and automatically executes the swap function or allows the buyer-side host, the seller-side host or the broker-side host to trigger the swap function.
6. A block chain-based electronic invoice validation and performance guarantee method is applied to a block chain network consisting of a plurality of node hosts, and comprises the following steps:
at the beginning, an authorized end host which is one of the node hosts issues an authorized invoice contract in advance in the blockchain network, wherein the authorized invoice contract comprises a blank invoice generating function;
providing a plurality of asset/service certificates by a vendor host which is one of the node hosts, and transmitting an invoice request to the authorization host;
when the authorization end host receives the invoice request, executing the blank invoice generating function to generate a plurality of blank electronic invoice certificates, and transmitting the generated blank electronic invoice certificates to the seller end host, wherein the blank electronic invoice certificates allow writing in transaction information;
when a transaction is carried out, a buyer-side host which is one of the node hosts, the seller-side host or an intermediate-side host issue a corresponding escrow transaction contract in the blockchain network, and the transaction message corresponding to the transaction is set in the escrow transaction contract;
after the escrow transaction contract is successfully issued, the seller-end host transmits one of the asset/service evidence and the blank electronic invoice evidence corresponding to the transaction to the escrow transaction contract, and the buyer-end host transmits at least one payment evidence corresponding to the transaction to the escrow transaction contract; and
and when the delivery condition in the escrow transaction contract is met, executing an exchange function of the escrow transaction contract, so that the exchange function transmits the asset/service evidence in the escrow transaction contract to the buyer end host computer, transmits the payment evidence to the seller end host computer, writes the transaction message into the blank electronic invoice evidence as the electronic invoice evidence, and transmits the electronic invoice evidence to the buyer end host computer.
7. The blockchain-based electronic invoice validation and performance assurance method according to claim 6, wherein the method further comprises the steps of:
when a return transaction is carried out, the seller-side host computer, the buyer-side host computer or the intermediary-side host computer issues a escrow return contract in the block chain network, and a return message corresponding to the return transaction is set in the escrow return contract;
after the escrow returning contract is successfully issued, the seller host computer transmits the payment pass certificate to be returned to the escrow returning contract when confirming that the returning message is correct, and the buyer host computer transmits the asset/service pass certificate corresponding to the returning transaction and the corresponding electronic invoice pass certificate to the escrow returning contract when confirming that the returning message is correct; and
and executing a return function of the escrow return contract after meeting a return condition in the escrow return contract, so as to transmit the asset/service certificate to the seller host, embed a logout message in the electronic invoice certificate, and transmit the payment certificate to the buyer host, wherein the return condition is met when the asset/service certificate, the payment certificate and the electronic invoice certificate are all in accordance with the return message, and automatically trigger the execution of the return function or allow the buyer host, the seller host or the mediator host to trigger the execution of the return function.
8. The method of claim 6, wherein the exchange function of the escrow transaction contract is executed when the seller host cancels a transaction or the buyer host detects a transaction error, for transmitting the asset/service clearance and the blank electronic invoice clearance in the escrow transaction contract to the seller host and for transmitting the payment clearance to the buyer host.
9. The method of claim 7, wherein the buyer host cancels the return or the seller host detects that the property/service certificate and the corresponding electronic invoice certificate in the escrow return contract are wrong, the return function is executed to transmit the property/service certificate and the electronic invoice certificate in the escrow return contract to the buyer host, and the payment certificate in the escrow return contract is transmitted to the seller host.
10. The method of claim 6, wherein the escrow transaction contract satisfies the delivery condition after the transaction message, the received asset/service certificate, and the payment certificate are correct, and the swap function is automatically executed or the buyer host, the seller host, or the intermediary host is allowed to trigger the swap function.
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| TW108147442A TWI716236B (en) | 2019-12-24 | 2019-12-24 | Electronic receipt/invoice confirming and escrow system based on blockchain and method thereof |
| TW108147442 | 2019-12-24 |
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| CN113034149A true CN113034149A (en) | 2021-06-25 |
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| CN113191865A (en) * | 2021-03-30 | 2021-07-30 | 建信金融科技有限责任公司 | Method, device, equipment and system for processing shipping charge data |
| CN113421094B (en) * | 2021-04-28 | 2023-05-09 | 中国电子科技网络信息安全有限公司 | Block chain-based indivisible asset intelligent contract implementation method |
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| TWI716236B (en) | 2021-01-11 |
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