KR20210040624A - Apparatus and method for storaging electronic receipt based on block chain - Google Patents

Abstract

The present invention relates to an apparatus and method for storing an electronic receipt based on block chains. The apparatus includes a memory and a processor electrically connected to the memory. The processor generates an electronic receipt block based on the payment history information of a business payment terminal, create the business index of the e-receipt block based on a business operator, add and store the e-receipt block to an e-receipt block chain corresponding to the business index, and links the operator index to the most recently used e-receipt block in the e-receipt block chain based on LRU (Least Recently Used). E-receipts can be easily managed according to business operators and users.

Description

Blockchain-based electronic receipt storage device and method {APPARATUS AND METHOD FOR STORAGING ELECTRONIC RECEIPT BASED ON BLOCK CHAIN}

The present invention relates to an e-receipt storage technology, and more particularly, based on a block chain, a blockchain-based store that stores an e-receipt generated according to a transaction between a business operator and a user so that it can be easily managed for each business operator and user. It relates to an electronic receipt storage device and method.

In the blockchain, small data called'blocks' as managed data are stored in a distributed data storage environment based on a chain-type connection created based on the P2P method, so that no one can arbitrarily modify them, and anyone can view the results of changes. It is a data deficit prevention technology based on distributed computing technology that can be done. This is fundamentally a form of distributed data storage technology. It is a change list that records continuously changing data in all participating nodes, and is designed to prevent arbitrary manipulation by the operator of the distributed node.

Blockchain technology is used for cryptocurrency systems such as bitcoin or for storing transaction records of financial institutions, and recently, it is also used for electronic document management and original verification. It is possible to induce participation in the blockchain network through technology that can manage electronic receipts using blockchain technology.

Korean Patent Publication No. 10-2018-0085570 (2018.07.27) relates to an apparatus and method for managing data using a block chain, and a block chain formed by a plurality of node terminals to synchronize and store data, and the The device that manages the storage, inquiry, and deletion of data in the blockchain is a main control unit that controls the management of data by transmitting a chain command for managing the block chain and a data command for managing the data to the node terminal, and the chain command. Blockchain storage in which empty space has been removed according to the block size limit of the file system, including the DB management unit that stores the created chain information in the chain table and stores the mapping information of data and transactions saved by the data command in the mapping table. Since data is stored in an area, it is possible to provide an apparatus and method for managing data using a block chain that enables efficient data storage in preparation for a storage area.

Korean Patent Laid-Open Publication No. 10-2019-0036948 (2019.04.05) relates to a data management system and method in a blockchain. In a node that manages data in a blockchain, the blockchain is the first It includes a block chain and a second block chain that stores hash information of data stored in the first block chain, and the first block chain and the second block chain manage data by interworking with each other to manage the data itself in the block chain. It can provide a data management system and method in a blockchain that can store and delete data.

Korean Patent Publication No. 10-2018-0085570 (July 27, 2018) Korean Patent Publication No. 10-2019-0036948 (2019.04.05)

An embodiment of the present invention provides a block chain-based electronic receipt storage device and method for storing electronic receipts generated according to transactions between operators and users based on a block chain so that they can be easily managed for each operator and user. I want to.

An embodiment of the present invention is to provide a block chain-based electronic receipt storage device and method that can quickly store and access electronic receipt blocks in a multi-chain structure by creating an index table based on a business operator and an index table based on a user. .

An embodiment of the present invention provides a block-chain-based electronic receipt storage device and method for storing an e-receipt block for each operator and user based on LRU (Least Recently Used) to easily check new and changed transactions by adding an e-receipt block to the blockchain. I want to provide.

Among the embodiments, the block chain-based electronic receipt storage device includes a memory and a processor electrically connected to the memory, and the processor generates an electronic receipt block based on payment details information of the operator payment terminal, and To generate the operator index of the e-receipt block, add the e-receipt block to the e-receipt block chain corresponding to the operator index, and store the e-receipt block, and store the operator index based on the least recently used (LRU). Links to the most recently used e-receipt block in the blockchain.

The processor may generate an index for each operator, and may form an operator index table including the operator index and link information of the electronic receipt block chain corresponding to the index.

The processor may be configured to search for the e-receipt block in the e-receipt block chain using the operator index and the link information, and link the link information to the retrieved e-receipt block based on an LRU.

The processor may generate a user index based on a user, and may form a user index table including the user index and link information of the electronic receipt block chain corresponding to the index.

The processor may form the electronic receipt blockchain in a multidimensional index structure through the operator index table and the user index table.

The processor may link the operator index and the user index to the most recently used electronic receipt block, including search and inquiry, to become the leader block of the electronic receipt blockchain.

The processor can be removed from the e-receipt blockchain in the order of the most recently unused e-receipt blocks.

Among the embodiments, the method for storing electronic receipts based on a block chain includes the steps of generating an electronic receipt block based on payment details information of the operator payment terminal, generating an operator index and a user index based on the operator and the user, and the electronic Adding and storing a receipt block to an electronic receipt block chain formed in a multidimensional index structure through the operator index and the user index, and storing the operator index and the user index based on LRU (Least Recently Used). It includes linking to the most recently used e-receipt block in the main blockchain.

The disclosed technology can have the following effects. However, since it does not mean that a specific embodiment should include all of the following effects or only the following effects, it should not be understood that the scope of the rights of the disclosed technology is limited thereby.

Blockchain-based electronic receipt storage device and method according to an embodiment of the present invention can store electronic receipts generated according to transactions between operators and users based on the blockchain so that they can be easily managed for each operator and user. have.

The block chain-based electronic receipt storage device and method according to an embodiment of the present invention creates an index table based on a business operator and an index table based on a user, and stores the electronic receipt block in a multi-chain structure to ensure reliability. You can and can improve your search and lookup speed.

Blockchain-based e-receipt storage device and method according to an embodiment of the present invention is based on LRU (Least Recently Used) by adding and storing e-receipt blocks for each operator and user to the blockchain, thereby efficiently and systematically storing e-receipts. Can be managed.

1 is a diagram illustrating a block chain-based electronic receipt storage system according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a physical configuration of the electronic receipt storage device of FIG. 1.
3 is a block diagram showing functional elements of the processor in FIG. 2.
4 is a flowchart illustrating a process of storing an electronic receipt performed by the processor in FIG. 2.
FIG. 5 is a diagram illustrating an embodiment of an electronic receipt storage process performed through the electronic receipt storage device of FIG. 1.
6 is an exemplary diagram showing the form of an index table of an electronic receipt blockchain according to an embodiment.

Since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be variously changed and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereto.

Meanwhile, the meaning of terms described in the present application should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when it is mentioned that a component is "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between components, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "have" refer to implemented features, numbers, steps, actions, components, parts, or It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, and the identification code does not describe the order of each step, and each step has a specific sequence clearly in the context. Unless otherwise stated, it may occur differently from the stated order. That is, each of the steps may occur in the same order as the specified order, may be performed substantially simultaneously, or may be performed in the reverse order.

The present invention can be implemented as computer-readable code on a computer-readable recording medium, and the computer-readable recording medium includes all types of recording devices storing data that can be read by a computer system. . Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tapes, floppy disks, and optical data storage devices. Further, the computer-readable recording medium is distributed over a computer system connected by a network, so that computer-readable codes can be stored and executed in a distributed manner.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in commonly used dictionaries should be construed as having meanings in the context of related technologies, and cannot be construed as having an ideal or excessively formal meaning unless explicitly defined in the present application.

The term “e-receipt” generally refers to a receipt issued by attaching an electronic signature to the amount paid between the parties to the transaction, and the term “e-receipt” as used herein may include electronic invoices, electronic tax invoices, and electronic transaction statements. I can.

1 is a diagram illustrating a block chain-based electronic receipt storage system according to an embodiment of the present invention.

Referring to FIG. 1, a block chain-based electronic receipt storage system 100 may be implemented including a user terminal 110, a payment terminal 130, a payment approval server 150, and an electronic receipt storage device 170. have.

The user terminal 110 may be provided with an electronic receipt related to payment by a user through a transaction with a business operator and an electronic receipt related to payment change due to transaction cancellation, and may correspond to a computing device capable of performing an electronic receipt search function. have. Here, the user terminal 110 may be implemented as a smartphone, a laptop computer, or a computer, but is not limited thereto, and may be implemented as various devices such as a tablet PC. The user terminal 110 may be connected to the payment terminal 130, the payment approval server 150, and the electronic receipt storage device 170 through a network.

The user terminal 110 may determine whether to consent to issuance of the electronic receipt, and when consent to issuance of the electronic receipt is granted, may receive the electronic receipt. After payment is approved, the user terminal 110 may receive an electronic receipt related to payment approval from the payment approval server 150 or the electronic receipt storage device 170. In one embodiment, the user terminal 110 may receive an electronic receipt and output an electronic receipt whenever payment is approved according to a new transaction. The user terminal 110 may receive a notification of the electronic receipt change transaction whenever payment changes according to a change in an existing transaction. In one embodiment, the user terminal 110 may search for at least one electronic receipt issued for each user and may query transaction details included in the electronic receipt.

The payment terminal 130 may correspond to a POS (Point of Sale) terminal provided for payment and payment cancellation at an affiliated store (business operator) that sells goods or provides services, and is not limited thereto, and cash payment, card It may be implemented as a computing device capable of performing payment using a payment method suggested by a user, such as payment, simple payment, or mobile payment, and canceling payment. In one embodiment, the payment terminal 130 requests payment approval according to the user's payment information to the payment approval server 150, and when information indicating that payment approval has been completed is received from the payment approval server 150, the payment terminal 130 transmits payment related information. It can be delivered to the electronic receipt storage device 170. Here, when payment is approved, the payment terminal 130 may transmit payment details information including at least the user's purchase amount to the electronic receipt storage device 170.

In one embodiment, the payment terminal 130 may request the payment approval server 150 to change payment according to the user's transaction cancellation. Before requesting the payment change to the payment approval server 150, the payment terminal 130 can query the electronic receipt change transaction details according to the payment change from the electronic receipt storage device 170 and prevent the transaction cancellation from being doubled. I can. The electronic receipt change transaction details inquiry according to the payment change may be performed by the payment approval server 150. In one embodiment, the payment terminal 130 may search for at least one electronic receipt issued for each business operator and may query transaction details included in the electronic receipt.

The payment approval server 150 may include a general-purpose computer, a laptop, a data server, etc. that calculate various data to perform payment approval for the user's payment information. In one embodiment, the payment approval server 150 may include a card company server, a mobile payment server, or a simple payment server, but is not limited thereto, and a value added network (VAN) company server or a payment gateway (PG) for electronic payment. ), etc. may be included. The payment approval server 150 completes payment approval and transmits information indicating that payment approval is completed to the payment terminal 130 when approval for payment information according to the user's product payment or service provision is requested from the payment server 130. I can. Here, the payment information may include product information, service information, or amount, etc. input or selected in the payment terminal 130 in relation to a product purchased by the user or a service provided to the user.

In one embodiment, the payment approval server 150 may issue payment matching information to the payment terminal 130 after payment approval. Here, the payment matching information may include an authorization number or an authorization key. The payment approval server 150 includes the affiliate store name, affiliate store address, affiliate store contact information, payment time, payment amount, payment matching information (eg, approval number, approval key, etc.), and user identification information (eg, user ID, name, contact information, etc.). ) Can be stored in the payment approval history information. The payment approval server 150 may request an electronic receipt to the electronic receipt storage device 170 and provide an electronic receipt to the user terminal 110.

In one embodiment, the payment approval server 150 may perform a payment change processing in response to a payment change request from the payment terminal 130 and transmit the payment change to the electronic receipt storage device 170 whenever the payment is changed. have. The payment approval server 150 may provide payment change details information to the electronic receipt storage device 170.

The electronic receipt storage device 170 may provide an electronic receipt to the user terminal 110 and may be implemented as a computer or a server corresponding to a program capable of managing electronic receipt change transactions. The electronic receipt storage device 170 may be connected to the user terminal 110, the payment terminal 130, and the payment approval server 150 through a network, and may exchange information.

In one embodiment, the e-receipt storage device 170 may provide an e-receipt and store the e-receipt based on a block chain. The electronic receipt storage device 170 may receive the user's payment details information from the payment terminal 130 to generate an electronic receipt and provide the generated electronic receipt to the payment approval server 150 or the user terminal 110. have. The electronic receipt storage device 170 may generate an electronic receipt block based on payment details information of the business payment terminal 130. The e-receipt storage device 170 can create a business index of the e-receipt block based on the business operator, and search for the e-receipt block chain and the e-receipt block by adding the e-receipt block to the e-receipt block chain corresponding to the operator index It is possible to create and store a business operator index table including a business operator index. The electronic receipt storage device 170 may generate an index for each user and may form a multidimensional index structure together with an index for each operator.

In one embodiment, the electronic receipt storage device 170 may be implemented including a processor, a memory, a user input/output unit, and a network input/output unit, which will be described in more detail with reference to FIG. 2.

FIG. 2 is a block diagram illustrating a physical configuration of the electronic receipt storage device of FIG. 1.

Referring to FIG. 2, the electronic receipt storage device 170 may include a processor 210, a memory 230, a user input/output unit 250, and a network interface 270.

The processor 210 can execute each procedure for storing the electronic receipt according to the payment approval and change performed between the payment terminal 130 and the payment approval server 150 based on a blockchain, and is read throughout the process. The created or created memory 230 may be managed, and a synchronization time between the volatile memory and the nonvolatile memory in the memory 230 may be scheduled. The processor 210 can control the overall operation of the electronic receipt storage device 170, and is electrically connected to the memory 230, the user input/output unit 250, and the network input/output unit 270 to control data flow between them. can do. The processor 210 may be implemented as a CPU (Central Processing Unit) of the electronic receipt storage device 170.

The memory 230 is implemented as a nonvolatile memory such as a solid state disk (SSD) or a hard disk drive (HDD), and may include an auxiliary storage device used to store all data required for the e-receipt storage device 170, and , A main memory device implemented as a volatile memory such as random access memory (RAM).

The user input/output unit 250 may include an environment for receiving a user input and an environment for outputting specific information to a user. For example, the user input/output unit 250 may include an input device including an adapter such as a touch pad, a touch screen, an on-screen keyboard, or a pointing device, and an output device including an adapter such as a monitor or a touch screen. In one embodiment, the user input/output unit 250 may correspond to a computing device accessed through a remote connection, and in that case, the electronic receipt storage device 170 may be performed as a server.

The network input/output unit 270 includes an environment for connecting to an external device or system through a network, for example, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), and a VAN ( Value Added Network) may include an adapter for communication.

3 is a block diagram showing functional elements of the processor in FIG. 2.

Referring to FIG. 3, the processor 210 includes an electronic receipt block generation unit 310, a business operator index generation unit 330, a user index generation unit 350, an electronic receipt storage unit 370, and a control unit 390. can do.

The electronic receipt block generation unit 310 may generate an electronic receipt block based on payment details information of the business payment terminal 130. The electronic receipt block generation unit 310 may generate an electronic receipt block by receiving payment details information from the payment terminal 130 of the operator whenever a transaction is made between the user and the operator. The payment detail information may include at least the user's purchase amount, and may further include at least one of a payment date and time, a product name, a quantity, a product type, an affiliate store name, an affiliate store address, an affiliate store contact information, and a payment method.

The electronic receipt block generation unit 310 may generate an electronic receipt based on payment details information, generate a hash code for a specific area of the electronic receipt, and encrypt the electronic receipt with a hash code to block the electronic receipt. Can be created. In one embodiment, the e-receipt block generator 310 may generate a hash code for all or a selected part of the e-receipt, and the hash code may be determined in various ways. The e-receipt block may include block-related information and e-receipt information issued by each transaction. The block-related information may include block identification information, block generation time, and hash code, and other information may be additionally included. The block identification information may mean identification information that can be distinguished from other electronic receipt blocks. The block generation time may mean information on the generation time of the corresponding e-receipt block, and the connection order of the e-receipt blocks may be determined using the block generation time. The block hash code corresponds to the summary of the e-receipt and enables efficient management and verification of e-receipts. The e-receipt information corresponds to information that is not based on other information, and may be information on an e-receipt issued by a transaction between a business operator and a user. The electronic receipt information may include payment details information and payment matching information. The payment details information may include detailed information of the electronic receipt item, for example, merchant information such as merchant name, address, and contact information, product name, quantity, amount, transaction date, and payment method. The payment matching information may correspond to a payment identification code, for example, an approval number that is uniquely issued by the payment approval server 150 after payment is completed.

The operator index generator 330 may generate an operator index of the electronic receipt block based on the operator. In one embodiment, the operator index generator 330 may generate an index for each operator, and may generate an operator index table for searching for an electronic receipt block by using the operator as an index. The operator index table may include the operator index of the e-receipt blockchain and link information of the e-receipt blockchain corresponding to the index. The operator index may correspond to a configuration for classifying the electronic receipt block chains stored in the e-receipt storage unit 370 for each operator to search for an e-receipt block. Each e-receipt block chain stored in the e-receipt storage unit 370 may correspond to a corresponding operator index. A business operator can search for the desired e-receipt blocks all at once by using the business operator index. In addition, the link information may be composed of location information of the leader block of the electronic receipt block chain related to the operator index stored in the electronic receipt storage unit 370.

The user index generator 350 may generate a user index of the electronic receipt block based on the user. In an embodiment, the user index generator 330 may generate an index for each user and may generate a user index table that enables searching for an electronic receipt block by using the user as an index. The user index table may include the user index of the e-receipt blockchain and link information of the e-receipt blockchain corresponding to the index. The user index may correspond to a configuration for classifying the electronic receipt block chains stored in the electronic receipt storage unit 370 for each user to search for the electronic receipt block. Each electronic receipt block chain stored in the e-receipt storage unit 370 may correspond to a corresponding user index. The user can search for desired e-receipt blocks at once by using this user index. In addition, the link information may be composed of location information of the leader block of the electronic receipt block chain related to the user index stored in the electronic receipt storage unit 370.

In an embodiment, a multimensional index structure may be formed based on the operator index table and the user index table respectively generated by the operator index generator 330 and the user index generator 350.

The e-receipt storage unit 370 may store an e-receipt block chain in which e-receipt blocks are connected in a time series in a multidimensional index structure of a business operator index and a user index. The e-receipt storage unit 370 may form an e-receipt block chain by connecting e-receipt blocks according to the order in which they are generated. The e-receipt blockchain can include the e-receipt main blockchain and the e-receipt-derived blockchain. The e-receipt main block chain may mean a set of blocks in which a plurality of e-receipt new transaction blocks are connected in one dimension. At this time, in the e-receipt main block chain, any one e-receipt new transaction block may be connected by including the hash value of the e-receipt new transaction block created immediately before. The e-receipt-derived blockchain is derived from the e-receipt main blockchain and includes a root block and at least one connecting block connected thereto. The root block is a block included in the main e-receipt blockchain, and is the block from which the e-receipt-derived blockchain is derived. The at least one connection block is an electronic receipt change transaction block, and the electronic receipt change transaction block may be connected in proportion to the number of payment changes for one electronic receipt. Here, the e-receipt-derived block chain may mean a set of connected blocks by deriving the e-receipt change transaction blocks into an e-receipt new transaction block connected to the e-receipt main block chain. At this time, in the e-receipt-derived block chain, any one e-receipt change transaction block may be connected by including the hash value of the e-receipt change transaction block created immediately before for the same transaction.

In one embodiment, the e-receipt storage unit 370 may store the e-receipt by adding the e-receipt block generated each time the e-receipt block is generated to the e-receipt block chain corresponding to the operator index and user index. The e-receipt storage unit 370 may store the e-receipt block by connecting the e-receipt block to the e-receipt block chain corresponding to the operator index and user index based on the operator and user who are the parties to the e-receipt block. The e-receipt storage unit 370 can search for an e-receipt block in the e-receipt block chain using a business operator index or a user index, and retrieve transaction details included in the e-receipt block. In one embodiment, the e-receipt storage unit 370 allows link information of the operator index and the user index to be linked to the most recently used e-receipt block, including addition, search, and inquiry based on LRU (Least Recently Used). It can be configured so that the most recently used e-receipt block becomes the leader block of the e-receipt blockchain. The e-receipt storage unit 370 can manage the expansion, storage capacity, and processing speed of the e-receipt blockchain by removing it from the e-receipt blockchain in the order of e-receipt blocks that are not used most recently.

The control unit 390 controls the overall operation of the processor 210, and controls between the electronic receipt block generation unit 310, the operator index generation unit 330, the user index generation unit 350, and the electronic receipt storage unit 370. You can manage the flow or data flow.

4 is a flowchart illustrating a process of storing an electronic receipt based on a block chain performed by the processor in FIG. 2.

Referring to FIG. 4, the processor 210 may generate an electronic receipt block based on payment details information of the business payment terminal 130 (step S410).

The processor 210 may generate the operator index and the user index based on the operator and the user (step S430).

The processor 210 may store the electronic receipt block by adding it to the electronic receipt block chain formed in a multidimensional index structure through the operator index and the user index (step S450).

The processor 210 may link the operator index and the user index to the most recently used e-receipt block in the e-receipt blockchain based on the least recently used (LRU) (step S470).

FIG. 5 is a diagram illustrating an embodiment of a block chain-based e-receipt storage process performed through the e-receipt storage device of FIG. 1.

Referring to FIG. 5, when a user purchases a product or service, a user may request a payment by presenting a payment method for payment of a purchase amount to a seller, and may convey an intention to consent to issuance of an electronic receipt.

The payment terminal 130 may request payment approval from the payment approval server 150 for the user's purchase amount and payment method-related information, and the payment approval server 150 may perform payment approval processing. The payment approval server 150 may transmit an approval number for identifying payment approval details to the payment terminal 130 after approving the payment of the purchase amount using the user's payment method.

After payment is completed, the payment terminal 130 may determine whether or not the user agrees to issue an electronic receipt, and if there is no consent, output a paper receipt and provide it to the user. The payment terminal 130 may process a request for issuing an electronic receipt when the user agrees to issue an electronic receipt. That is, the payment terminal 130 may transmit payment detail information including at least user and business information to the electronic receipt storage device 170 to process an electronic receipt issuance request.

When payment details information is received from the payment terminal 130, the electronic receipt storage device 170 may generate an electronic receipt based on the payment details information. Here, the electronic receipt may be generated in the same form as the paper receipt including the user's purchase details. The electronic receipt storage device 170 may provide the generated electronic receipt to the user terminal 110 through the payment approval server 150 or directly to the user terminal 110.

The e-receipt storage device 170 may generate an e-receipt block to store the generated e-receipt based on a block chain. The e-receipt storage device 170 may generate a business operator index based on a business operator for storage and management of the electronic receipt block, and may generate a user index based on a user. The e-receipt storage device 170 may store the e-receipt block by adding it to an e-receipt block chain formed in a multidimensional index structure through a business operator index and a user index.

The e-receipt storage device 170 may search the e-receipt block chain from the user terminal 110 or the operator payment terminal 130 using the operator index or the user index to search the e-receipt block. The e-receipt storage device 170 configures the storage location of the most recently used e-receipt block in which search and inquiries were made as link information, so that the latest e-receipt block can become the leader block of the e-receipt block chain, You can quickly search and search receipts.

6 is an exemplary diagram showing the form of an index table of an electronic receipt block chain formed in an electronic receipt storage device according to an embodiment.

6, the block chain-based electronic receipt storage device 170 according to an embodiment may generate a business operator index table 500 based on a business operator, and a user index table 600 based on a user. Can be created. The block chain-based electronic receipt storage device 170 according to an embodiment may generate an electronic receipt block based on payment details information when a transaction is made between a business operator and a user, and block information and electronic receipt information are stored in the electronic receipt block. Can include. The e-receipt block can form an e-receipt block chain by connecting them in the order of time created by each operator and by user. The e-receipt block may include a hash code of at least a portion of the block immediately preceding the e-receipt block chain.

The block chain-based e-receipt storage device 170 according to an embodiment links the operator index and the user index to the most recently used e-receipt block in the e-receipt blockchain based on LRU (Least Recently Used). Information can be changed and removed from the e-receipt blockchain in the order of the most recently unused e-receipt blocks.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. You will understand that you can do it.

100: Blockchain-based electronic receipt storage system
110: user terminal 130: payment terminal
150: payment approval server 170: electronic receipt storage device
210: processor 230: memory
250: user input/output unit 270: network input/output unit
310: electronic receipt block generation unit 330: operator index generation unit
350: user index generation unit 370: electronic receipt storage unit
390: control unit
500: operator index table
600: user index table

Claims (8)

A memory and a processor electrically connected to the memory,
The processor is
Create an electronic receipt block based on the payment details information of the operator's payment terminal,
Create a business operator index of the e-receipt block based on the business operator,
Add and store the electronic receipt block to the electronic receipt block chain corresponding to the operator index,
Linking the operator index to the most recently used e-receipt block in the e-receipt blockchain based on LRU (Least Recently Used)
Blockchain-based electronic receipt storage device.
The method of claim 1, wherein the processor
Create an index for each business operator,
Blockchain-based electronic receipt storage device, characterized in that to form an operator index table including link information of the electronic receipt block chain corresponding to the operator index and the index.
The method of claim 2, wherein the processor
Searching for the electronic receipt block in the electronic receipt block chain using the operator index and the link information,
Blockchain-based electronic receipt storage device, characterized in that the link information is configured to link to the searched electronic receipt block based on the LRU.
The method of claim 3, wherein the processor
Create a user index based on users,
Blockchain-based electronic receipt storage device, characterized in that to form a user index table including the user index and the link information of the electronic receipt block chain corresponding to the index.
The method of claim 4, wherein the processor
Blockchain-based electronic receipt storage device, characterized in that the electronic receipt block chain is formed in a multidimensional index structure through the operator index table and the user index table.
The method of claim 5, wherein the processor
Blockchain-based electronic receipt storage device, characterized in that by linking the operator index and the user index to the most recently used e-receipt block, including search and inquiry, as a leader block of the e-receipt block chain.
The method of claim 6, wherein the processor
Blockchain-based e-receipt storage device, characterized in that removing from the e-receipt block chain in the order of e-receipt blocks that are not used most recently.
Generating an electronic receipt block based on payment details information of a business payment terminal;
Generating an operator index and a user index based on the operator and the user;
Adding and storing the electronic receipt block to an electronic receipt block chain formed in a multidimensional index structure through the operator index and the user index; And
A blockchain-based electronic receipt storage device comprising the step of linking the operator index and the user index to the most recently used e-receipt block in the e-receipt main blockchain based on LRU (Least Recently Used).

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