KR102348739B1 - Apparatus and method for storaging electronic receipt based on block chain - Google Patents

Abstract

The present invention relates to a block chain-based electronic receipt storage device and method, comprising a memory and a processor electrically connected to the memory, wherein the processor generates an electronic receipt block based on payment history information of a business payment terminal, Create the operator index of the e-receipt block based on the operator, add the e-receipt block to the e-receipt block chain corresponding to the operator index and store it, and calculate the operator index based on LRU (Least Recently Used) Link to the most recently used e-receipt block in the e-receipt block chain.

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

In a blockchain, small-scale data called 'blocks' of managed data are stored in a chain-type, link-based distributed data storage environment created based on the P2P method. It is a data credit prevention technology based on distributed computing technology that can do this. This is essentially a form of distributed data storage technology, and it is a change list that records continuously changing data to all participating nodes, and is designed to prevent arbitrary manipulation by the operator of the distributed node.

Blockchain technology is used for virtual currency 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. By using blockchain technology, it is possible to induce participation in the blockchain network through technology that can manage e-receipts.

Korean Patent Application Laid-Open 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 for managing the storage, inquiry and deletion of data in the block chain includes a main control unit that controls the management of data by sending a chain command to manage the block chain and a data command to manage data to a node terminal, and a chain command Including the DB management unit that stores the generated chain information in the chain table and stores the mapping information of data and transactions stored by the data command in the mapping table. Since data is stored in the 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 the storage area.

Korean Patent Laid-Open Patent No. 10-2019-0036948 (2019.04.05) relates to a data management system and method in a block chain, in a node that manages data in a block chain, wherein the block chain stores the data a block chain, and a second block chain for storing hash information of data stored in the first block chain, wherein the first block chain and the second block chain interoperate to manage data and store 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 (2018.07.27) 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 a transaction between a business operator and a user based on a block chain to be easily managed for each business operator and user 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 the electronic receipt block in a multi-chain structure by creating a business-based index table and a user-based index table .

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

In embodiments, the block chain-based electronic receipt storage device includes a memory and a processor electrically connected to the memory, wherein the processor generates an electronic receipt block based on payment history information of the business payment terminal, and based on the business operator to create 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 it, and set the operator index based on LRU (Least Recently Used) to the e-receipt Link to the most recently used e-receipt block in the blockchain.

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

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

The processor may create a user index based on the user, and 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 e-receipt block chain 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 e-receipt block, including search and inquiry, to be a leader block of the e-receipt block chain.

The processor may remove from the e-receipt block chain in the order of the most recently unused e-receipt blocks.

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

The disclosed technology may have the following effects. However, this does not mean that a specific embodiment should include all of the following effects or only the following effects, so the scope of the disclosed technology should not be understood as being limited thereby.

The block chain-based electronic receipt storage device and method according to an embodiment of the present invention can store the electronic receipt generated according to a transaction between the operator and the user based on the block chain so that it can be easily managed for each operator and user. have.

A block chain-based electronic receipt storage device and method according to an embodiment of the present invention creates a business-based index table and a user-based index table, adds and stores an electronic receipt block in a multi-chain structure, so that the electronic receipt can be trusted. and can improve search and search speed.

The block chain-based electronic receipt storage device and method according to an embodiment of the present invention store electronic receipts efficiently and systematically by adding and storing electronic receipt blocks to the block chain for each operator and user based on LRU (Least Recently Used). can manage

1 is a diagram illustrating a block chain-based electronic receipt storage system according to an embodiment of the present invention.
Figure 2 is a block diagram illustrating the physical configuration of the electronic receipt storage device in Figure 1.
3 is a block diagram illustrating functional elements of the processor in FIG. 2 ;
4 is a flowchart illustrating an electronic receipt storage process performed through the processor in FIG.
5 is a view for explaining an embodiment of the electronic receipt storage process performed through the electronic receipt storage device in FIG.
6 is an exemplary diagram illustrating the form of an index table of the electronic receipt block chain 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 embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes 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 of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

When a component is referred to as being “connected to” another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, "between" and "between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The singular expression is to be understood as including the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the embodied feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

In each step, identification numbers (eg, a, b, c, etc.) are used for convenience of description, and identification numbers do not describe the order of each step, and each step clearly indicates a specific order in context. Unless otherwise specified, it may occur in a different order from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

The present invention can be embodied as computer-readable codes on a computer-readable recording medium, and the computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored. . Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like. In addition, the computer-readable recording medium is distributed in a computer system connected to a network, so that the computer-readable code 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 art to which the present invention belongs, unless otherwise defined. Terms defined in general used in the dictionary should be interpreted as having the meaning consistent with the context of the related art, and cannot be interpreted 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 for the amount paid between the parties to the transaction. 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 , the 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 a user's payment through a transaction with a business operator and an electronic receipt related to a 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 notebook computer, or a computer, and is not necessarily 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 agree to the issuance of the electronic receipt, and may receive the electronic receipt if the consent is given to the issuance of the electronic receipt. 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 after the payment is approved. In an embodiment, the user terminal 110 may receive an electronic receipt every time payment is approved according to a new transaction and may output the electronic receipt. The user terminal 110 may be notified of the electronic receipt change transaction whenever the payment is changed according to the change of the existing transaction. In an embodiment, the user terminal 110 may search for at least one electronic receipt issued for each user and inquire about transaction details included in the electronic receipt.

The payment terminal 130 may correspond to a point of sale (POS) terminal provided for payment and cancellation of payment to a merchant (business operator) that sells goods or provides services, but is not limited thereto, but is not limited to cash payment, card It may be implemented as a computing device capable of performing payment and canceling payment using a payment method presented by a user, such as payment, simple payment, or mobile 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 is completed is received from the payment approval server 150, payment related information It can be delivered to the electronic receipt storage device (170). Here, when the payment is approved, the payment terminal 130 may transmit payment history information including at least the purchase amount of the user to the electronic receipt storage device 170 .

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

The payment approval server 150 may include a general-purpose computer, laptop, data server, etc. that calculates various data in order 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, a simple payment server, etc., but is not limited thereto, but a VAN (Value Added Network) server or PG (Payment Gateway) for electronic payment. ) and the like. The payment approval server 150 completes payment approval when a user's request for approval of payment information according to product payment or service provision is requested from the payment server 130 and transmits information indicating that payment approval is completed to the payment terminal 130 . can Here, the payment information may include product information, service information, or amount 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 an 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 approval number or an approval key. The payment approval server 150 includes the merchant name, merchant address, merchant 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.) ), including payment approval history information, can be stored. The payment approval server 150 may make an electronic receipt request to the electronic receipt storage device 170 and may provide the electronic receipt to the user terminal 110 .

In one embodiment, the payment approval server 150 may perform a payment change processing for the payment change request of the payment terminal 130 and transfer 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 history 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 server corresponding to a computer or program capable of managing the electronic receipt change transaction. 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 electronic receipt storage device 170 may provide an electronic receipt and store the electronic receipt based on a block chain. The electronic receipt storage device 170 may generate an electronic receipt by receiving the user's payment history information from the payment terminal 130 , and may 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 history information of the business payment terminal 130 . The electronic receipt storage device 170 can create a business index of the electronic receipt block based on the business operator, and add the electronic receipt block to the electronic receipt block chain corresponding to the business index to search the electronic receipt block chain and the electronic receipt block It is possible to create and store the operator index table including the operator index for 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 in FIG. 2 .

Figure 2 is a block diagram illustrating the physical configuration of the electronic receipt storage device in Figure 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 may 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 the block chain, and is read throughout the process. It is possible to manage the lost or written memory 230 , and schedule a synchronization time between the volatile memory and the nonvolatile memory in the memory 230 . The processor 210 may 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 the 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 non-volatile memory, such as a solid state disk (SSD) or a hard disk drive (HDD), and may include an auxiliary storage device used to store overall data required for the electronic receipt storage device 170 and , and may include a main memory 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 the 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 connected through a remote connection, and in such a case, the electronic receipt storage device 170 may be performed as a server.

The network input/output unit 270 includes an environment for connecting with 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 (VAN). It may include an adapter for communication such as Value Added Network).

3 is a block diagram illustrating 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 index generation unit 330 , a user index generation unit 350 , an electronic receipt storage unit 370 and a control unit 390 . can do.

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

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

The business operator index generation unit 330 may generate a business operator index (index) of the electronic receipt block on the basis of the business operator. In one embodiment, the business operator index generation unit 330 may generate an index for each business operator and may create a business operator index table that can search the e-receipt block by using the business operator as an index. The operator index table may include the operator index of the e-receipt block chain and link information of the e-receipt block chain corresponding to the index. The business operator index may correspond to a configuration for classifying the electronic receipt block chains stored in the electronic receipt storage unit 370 by business operator so that the electronic receipt block can be searched. Each e-receipt block chain stored in the e-receipt storage unit 370 may correspond to a corresponding business index. A business operator can search for desired e-receipt blocks at once by using such a business index. And the link information may be composed of location information of the leader block of the e-receipt block chain associated with the operator index stored in the e-receipt storage unit 370.

The user index generator 350 may generate a user index of the electronic receipt block based on the user. In one embodiment, the user index generation unit 330 may generate an index for each user and may generate a user index table that can search the e-receipt block using the user as an index. The user index table may include a user index of the e-receipt block chain and link information of the e-receipt block chain corresponding to the index. The user index may correspond to a configuration for categorizing the electronic receipt block chains stored in the electronic receipt storage unit 370 for each user so that the electronic receipt block can be searched. Each e-receipt block chain stored in the e-receipt storage unit 370 may correspond to a corresponding user index, respectively. A user can search for desired e-receipt blocks at once using this user index. And the link information may be composed of location information of the leader block of the e-receipt block chain related to the user index stored in the e-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 the e-receipt block chain in which the e-receipt block is connected in time series with a multi-dimensional index structure of a business 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 creation order. The e-receipt blockchain can include the e-receipt main block chain and the e-receipt derivative block chain. 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 new e-receipt transaction block can be connected by including the hash value of the newly generated e-receipt new transaction block. The e-receipt-derived blockchain is derived from the e-receipt main blockchain and includes a root block and at least one connection block connected thereto. The root block is a block included in the e-receipt main block chain, and is the block from which the e-receipt derivative block chain derivation begins. 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 refer to a set of blocks in which the e-receipt change transaction blocks are derived and linked to the e-receipt new transaction block connected to the e-receipt main block chain. At this time, any one e-receipt change transaction block in the e-receipt-derived block chain can be connected by including the hash value of the e-receipt change transaction block created just 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 an e-receipt block is generated to the e-receipt block chain corresponding to the operator index and the user index. The e-receipt storage unit 370 may connect the e-receipt block to the e-receipt block chain corresponding to the operator index and the user index based on the operator and the user who are the transaction parties of the e-receipt block and may store it. The e-receipt storage unit 370 may search the e-receipt block in the e-receipt block chain by using the operator index or the user index, and may inquire the transaction details included in the e-receipt block. In one embodiment, the e-receipt storage unit 370 links to the most recently used e-receipt block including addition, search, and inquiry of link information of the operator index and user index based on LRU (Least Recently Used). It can be configured so that the most recently used e-receipt block is always the leader block of the e-receipt block chain. The e-receipt storage unit 370 can manage the expansion, storage capacity and processing speed of the e-receipt block chain by removing it from the e-receipt block chain in the order of the most recently unused e-receipt block.

The control unit 390 controls the overall operation of the processor 210, and controls between the electronic receipt block generation unit 310, the business 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 block chain-based electronic receipt storage process performed through the processor in FIG. 2 .

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

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

The processor 210 may store the e-receipt block by adding it to the e-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 block chain based on the least recently used (LRU) (step S470).

FIG. 5 is a view for explaining an embodiment of a block chain-based electronic receipt storage process performed through the electronic receipt storage device in FIG. 1 .

Referring to FIG. 5 , when a user purchases a product or service, he/she may request payment by presenting a payment method for payment of the purchase amount to the seller, and may communicate whether or not to agree to the issuance of an electronic receipt.

The payment terminal 130 may request payment approval for the user's purchase amount and payment method related information to the payment approval server 150 , and the payment approval server 150 may perform a payment approval process. After the payment approval server 150 approves payment of the purchase amount using the user's payment method, the payment approval server 150 may transmit an approval number for identifying the payment approval details to the payment terminal 130 .

The payment terminal 130 may determine whether the user agrees to issue an electronic receipt after payment is completed, and if there is no consent, it may output a paper receipt and provide it to the user. The payment terminal 130 may perform an electronic receipt issuance request processing when there is a user's consent to issue an electronic receipt. That is, the payment terminal 130 may transmit payment history information including at least user and business information to the electronic receipt storage device 170 to process the electronic receipt issuance request.

When payment history information is received from the payment terminal 130 , the electronic receipt storage device 170 may generate an electronic receipt based on the payment history information. Here, the electronic receipt may be generated in the same form as the paper receipt including the purchase details of the user. 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 electronic receipt storage device 170 may generate an electronic receipt block to store the generated electronic receipt based on the block chain. The electronic receipt storage device 170 may generate a business operator index based on the business operator for storage and management of the electronic receipt block, and may generate a user index based on the user. The e-receipt storage device 170 may store the e-receipt block by adding it to the e-receipt block chain formed in a multidimensional index structure through a business index and a user index.

The electronic receipt storage device 170 can search the electronic receipt block by using the operator index or the user index from the user terminal 110 or the operator payment terminal 130 to search the electronic receipt block chain. The e-receipt storage device 170 configures the storage location of the most recently used e-receipt block that has been searched and inquired as link information, so that the recent e-receipt block can become the leader block of the e-receipt block chain, and using this You can quickly search and inquire about receipts.

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

Referring to FIG. 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 create The block chain-based electronic receipt storage device 170 according to an embodiment may generate an electronic receipt block based on payment history information when a transaction is made between a business operator and a user, and block information and electronic receipt information in the electronic receipt block may include The e-receipt block can form an e-receipt block chain by being connected 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 part of a block immediately preceding in the e-receipt block chain.

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

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

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: e-receipt block generation unit 330: business 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 e-receipt block based on the payment history information of the business payment terminal,
Create a business index of the e-receipt block based on the business operator, and form a business index table including the business index and link information of the e-receipt block chain corresponding to the index,
Create a user index of the e-receipt block based on the user and form a user index table including the user index and link information of the e-receipt block chain corresponding to the index,
Storing an electronic receipt block chain in which the electronic receipt block is connected in time series in a multidimensional index structure of a business index and a user index based on the business index table and the user index table,
Each time an e-receipt block is created, the e-receipt block is added and stored in the e-receipt block chain corresponding to the business index and user index,
Search or inquire the e-receipt block in the e-receipt block chain using the operator index or the user index and the link information,
Based on LRU (Least Recently Used), the link information is configured to link to the most recently used e-receipt block including addition, search, and inquiry, so that the most recently used e-receipt block is always the leader block of e-receipt block chain with
To manage the expansion, storage capacity and processing speed of the e-receipt block chain by removing it from the e-receipt block chain in the order of the most recently unused e-receipt block
Blockchain-based electronic receipt storage device.
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