JP2020060954A - Trading method, trade processing apparatus, trade processing system and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trading method, a trading processing device, a trading processing system, and a computer program having high resistance to the occurrence of a device failure or malfunction.
A trade processing system according to the present embodiment includes a plurality of trade processing devices that share a block chain, and the trade processing device receives sales information about a product for sale from a seller and sells the sales information. Is stored in a data block of a blockchain and a purchaser who wishes to purchase the sale item determines whether or not the sale item is received, and the consideration of the sale item is expressed in virtual currency. A payment information processing unit that receives payment information including a payment smart contract and stores the payment information in the data block, and the payment information when the receipt confirmation of the sale item is received from the purchaser. And a remittance processing unit that performs a process of remitting the virtual currency to the seller.
[Selection diagram] Figure 1

Description

  The present invention relates to a trading method, a trading processing device, a trading processing system, and a computer program that support trading between a seller and a buyer.

  2. Description of the Related Art In recent years, a trading system such as a flea market or an online auction system in which users use terminal devices such as smartphones (smartphones), tablet terminals and PCs (personal computers) to buy and sell goods via the Internet has become widespread. It is popular. The seller publishes information such as images, names, prices, qualities, and sales periods of products for sale on a website on the Internet or the like. The purchaser confirms the information on the sale item published on the website or the like and purchases the sale item.

  Patent Document 1 proposes an electronic commerce system that automates the review of sales prices and the transfer of auction information to a new electronic commerce site in electronic commerce using the Internet. In this electronic commerce system, when the user registers sales information on the first commerce site, the selling price review amount or the price reduction rate that determines the price reduction range when the sales period and the selling price are reviewed is set, and the sales Review the price and set the number of times to relist. The e-commerce system automatically reviews the selling price by the number of times of relisting, repeats relisting at the first commerce site, the number of relisting set at the first commerce site ends, and the sales period at the first commerce site When the above is finished, the exhibition information set at the first commercial transaction site and the price information at the time of end of sale at the first commercial transaction site are transmitted to the second commercial transaction site in the second online sales system.

JP, 2017-228207, A

  In the electronic commerce system according to Patent Document 1, a website for electronic commerce is realized by one server device, and terminal devices of a plurality of users access one server device to perform electronic commerce. In the system having such a configuration, when one server device fails or malfunctions, the entire system stops operating.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a trading method, a trading processing device, a trading processing system, and a computer program that have high resistance to the occurrence of a failure or malfunction of the device. To provide.

  A trading method according to the present invention receives sales information on a product for sale from a seller, stores the sales information in a data block of a block chain, and a purchaser who desires to purchase the product for sale sells the product for sale. Accept payment information including a smart contract for determining whether or not to receive the sale item in virtual currency, store the payment information in the data block, and receive confirmation of receipt of the sale item from the purchaser In this case, the virtual currency related to the payment information is remitted to the seller.

  Further, in the trading method according to the present invention, the sales information includes information on a selling price of the sale item, the payment information includes information on a payment price for the sale item, and the payment information is accepted. In this case, it is characterized in that it is determined whether the payment price satisfies the selling price.

  Further, the trading method according to the present invention is characterized in that, when a return request for the product for sale is received from the purchaser, the virtual currency related to the payment information is remitted to the purchaser.

  Further, the trading method according to the present invention, when a return request for the sale item is received from the purchaser and a return confirmation of the sale item is received from the seller, the virtual currency relating to the payment information is Characterized by a refund to the purchaser.

  Further, the trading method according to the present invention uses the learning model that inputs the sales information and outputs the sales aptitude of the sales information related to the sales information, and sells the sales information related to the sales information received from the seller. It is characterized by determining suitability.

  Further, in the sales method according to the present invention, the sales information includes a description of the sale item, an image of the sale item and information of a sale price of the sale item, and the learning model is an explanation of the sale item, It is characterized in that learning is performed by using teacher data in which the image of the sale item and the sale price information of the sale item are associated with the sales suitability of the sale item.

  Further, the selling / selling method according to the present invention is characterized by deciding whether or not to sell the sale item related to the sale information received from the seller, based on the result of the determination of sale suitability.

  Further, the trading method according to the present invention is characterized in that sales suitability information including a sales suitability determination result and identification information of the seller is stored in the data block.

  Also, the trading method according to the present invention calculates an evaluation value of the seller based on the result of the determination of the sales suitability, and stores evaluation information including the evaluation value and identification information of the seller in the data block. It is characterized by

  Further, the trading method according to the present invention is characterized in that a seller's evaluation of a purchaser is accepted, a seller's evaluation of a seller is accepted, and evaluation information including the accepted evaluation is stored in the data block.

  Further, the trading method according to the present invention is characterized in that evaluation information regarding other sales for the seller or the purchaser is acquired, and the acquired evaluation information is provided to the purchaser or the seller.

  Further, in the selling / buying method according to the present invention, the sales information includes information on a selling price of the sale item, the payment information includes information about a payment price for the sale item, and The selling price is reduced, and when the payment price is equal to or higher than the selling price, the purchaser is granted the right to purchase the sale item.

  Further, in the trading method according to the present invention, when the payment information including the information on the payment price of the same amount is received from a plurality of purchasers, one purchaser is selected and selected according to the reception time of the payment information. It is characterized in that one purchaser is given the right to purchase the sale item.

  Further, the sale processing apparatus according to the present invention includes a sales information processing unit that receives sale information about a sale item from a seller and stores the sale information in a data block of a block chain, and a purchase of the sale item. From the purchaser who desires to receive payment information including a smart contract that determines whether or not the sale item is received and pays the price of the sale item in virtual currency, and stores the payment information in the data block. A payment information processing unit that performs payment, and a remittance processing unit that performs a process of remitting the virtual currency related to the payment information to the seller when a receipt confirmation of the sale item is received from the purchaser. To do.

  Further, the trading system according to the present invention includes a plurality of trading processors that share a block chain, and the trading processor receives sales information on a product for sale from a seller and sends the sales information to the block chain. A sales information processing unit that stores data in a data block, and a smart contract that determines whether or not the sale item is received from a purchaser who wants to purchase the sale item and pays the price of the sale item in virtual currency. A payment information processing unit that receives payment information including the payment information and that stores the payment information in the data block, and a virtual currency related to the payment information when the receipt confirmation of the sale item is received from the purchaser. It has a remittance processing unit that performs a process of remittance to the seller.

  In addition, the computer program according to the present invention allows a computer to receive sales information on a product for sale from a seller, store the sales information in a data block of a block chain, and purchase from the purchaser who desires to purchase the product for sale. Receiving payment information including a smart contract for determining whether or not the sale item is received and paying the consideration for the sale item in virtual currency, storing the payment information in the data block, and selling the sale item from the purchaser. When the receipt confirmation of is received, the process of performing the process of remitting the virtual currency related to the payment information to the seller is executed.

  Further, the computer program according to the present invention causes a computer to accept a purchase operation for a sale item related to sales information stored in a data block of a block chain, and whether or not to receive the sale item according to the accepted purchase operation. Is determined to generate payment information including a smart contract for paying the price of the sale item in virtual currency, and the generated payment information is transmitted to a block chain.

  Further, the computer program according to the present invention receives an input of information on a sale item from a computer, generates sales information on the sale item based on the received information, and stores the generated sale information in the block. It is characterized in that the process of transmitting to the chain is executed.

In the present invention, a plurality of transaction processing devices that communicate with each other share a block chain in which a plurality of data blocks are associated in order. The transaction processing device receives sales information related to an item for sale from a seller and stores it in a data block of the block chain. The sales information stored in the block chain can be viewed by the purchaser. The transaction processing device receives payment information for paying the price of the sale item in virtual currency from a purchaser who desires to purchase the sale item, and stores the payment information in a data block of the block chain. However, the payment information includes a smart contract program that determines whether or not the sale item has been received, and the payment is not made when the payment information is stored in the blockchain. Payment is made after it is made. By the program of this smart contract, the transaction processing device sends the virtual currency of the consideration to the seller when receiving confirmation of receipt of the article for sale from the purchaser.
By performing the trading process performed between the seller and the purchaser using the block chain shared by multiple trading processing devices, the trading process is performed even if one of the trading processing devices fails or malfunctions. It becomes possible to do.

  Further, in the present invention, the sale information includes information on the sale price of the sale item, and the payment information includes information about the payment price for the sale item. When the payment information from the purchaser is accepted, it is determined whether or not the payment price included in the payment information satisfies the selling price of the sale target item. As a result, the sale item is sold at the sale price set by the seller.

  Further, in the present invention, it is possible to accept a return request for a product for sale from a purchaser. When the return request from the purchaser is accepted, the virtual currency related to the payment information is returned to the purchaser. As a result, it is possible to prevent the purchaser from suffering a disadvantage, for example, when the product for sale has a defect.

  Further, in the present invention, the virtual currency related to the payment information is refunded to the purchaser when the return request is received from the purchaser and the return confirmation of the sale item is received from the seller. This can prevent the seller from being disadvantaged by a malicious purchaser.

  Further, in the present invention, the suitability for sale of the sale item is determined using a learning model. The learning model is a learned learning model in which the sales information is input and the sales aptitude of the sale item is output. Learning of the learning model can be performed by using, for example, teacher data in which a description of the sale item, an image of the sale item, and information about the sale price of the sale item are associated with the sales aptitude of the sale item. By using such a learning model to judge the sales suitability of the sold product and determine whether or not to sell the sold product based on the determination result, it is possible to prevent the unauthorized sale of the sold product.

  Further, in the present invention, the sales suitability information including the judgment result of the sales suitability of the sold product by the learning model and the identification information of the seller of the sold product is stored in the data block of the block chain. As a result, the purchaser can confirm the result of the determination of the sales suitability based on the learning model of the sold product.

  Further, in the present invention, the evaluation value of the seller is calculated based on the determination result of the sales aptitude of the sales object by the learning model, and the evaluation information including the calculated evaluation value and the identification information of the seller is used as the data block of the block chain. To store. Thereby, the purchaser who is going to purchase the sale item can refer to the evaluation of the seller who sells the sale item, and can use it as a decision material for the purchase.

  Further, in the present invention, the seller's evaluation of the purchaser is accepted, the seller's evaluation of the seller is accepted, and the evaluation information including the accepted evaluation is stored in the data block of the block chain. As a result, it is possible to store information on the evaluations by both the seller and the purchaser related to the sales of the sold product in the block chain, and use these evaluations as a judgment material for the subsequent sales.

  Further, in the present invention, when the seller or the user of the purchaser is using a trading system such as another flea market or an auction, the evaluation of the user in the other trading system is acquired, and this evaluation is sold by the seller. Or provide to the purchaser. As a result, it is possible to provide the evaluation of a newly entered user or the like based on the evaluation of another trading system.

  Further, in the present invention, the selling price of the article for sale is reduced with the passage of time. The purchaser who wants to purchase the sale item sets the payment price for the sale item in the payment information stored in the block chain. When the selling price decreases and the payment price set by the purchaser becomes equal to or higher than the selling price, the purchaser who sets the payment price is granted the right to purchase the sale item. As a result, it is possible to establish the sale and sale of the sale item in a state where the selling price that the seller wants to sell and the payment price that the buyer wants to buy are balanced.

  Further, in the present invention, when a plurality of purchasers set the same payment price in the payment information, one purchaser is selected according to the time when the payment information is received from the purchasers, and the selected one is selected. Grants the purchaser the right to purchase the product for sale. As a result, it can be expected that the sale of the product for sale will be completed early.

  In the case of the present invention, it can be expected to improve the resistance to the occurrence of a device failure or malfunction.

It is a schematic diagram for explaining an outline of a transaction processing system according to the present embodiment. It is a block diagram which shows the structure of the node device which concerns on this Embodiment. It is a schematic diagram which shows one structural example of the block chain which concerns on this Embodiment. It is a block diagram which shows the structure of the server apparatus which concerns on this Embodiment. It is a schematic diagram which shows one structural example of the user information DB which concerns on this Embodiment. It is a block diagram which shows the structure of the smartphone which concerns on this Embodiment. It is a timing chart which shows an example of the trading process performed in the trading system which concerns on this Embodiment. It is a timing chart which shows an example of the trading process performed in the trading system which concerns on this Embodiment. It is a flowchart which shows the procedure of the transmission process of the sales information which the smartphone which concerns on this Embodiment performs. It is a flowchart which shows the procedure of the reception process of the sales information which the node device of the block chain system which concerns on this Embodiment performs. It is a flowchart which shows the procedure of the transmission process of the payment information which the smartphone which concerns on this Embodiment performs. It is a flowchart which shows the procedure of the payment information receiving process which the node device of the block chain system which concerns on this Embodiment performs. It is a flow chart which shows the procedure of the notice processing which the server unit concerning this embodiment performs. It is a flow chart which shows a procedure of processing of receipt confirmation and returned goods which a smart phone concerning this embodiment performs. It is a flowchart which shows the procedure of the payment condition determination processing which the node device of the block chain system which concerns on this Embodiment performs. FIG. 6 is a schematic diagram for explaining an outline of a trading processing system according to a second embodiment. FIG. 9 is a schematic diagram showing a configuration example of a block chain according to a second embodiment. FIG. 6 is a block diagram showing the configuration of a second server device according to the second embodiment. FIG. 9 is a schematic diagram showing a configuration of an aptitude determination model according to the second embodiment. 9 is a flowchart showing a procedure of aptitude determination processing performed by the second server device according to the second embodiment. 9 is a flowchart showing a procedure of evaluation acceptance processing performed by the smartphone according to the second embodiment. 9 is a flowchart showing a procedure of evaluation display processing performed by the smartphone according to the second embodiment. FIG. 11 is a schematic diagram for explaining the configuration of a transaction processing system according to a modification of the second embodiment. FIG. 11 is a schematic diagram for explaining a trading method by the trading processing system according to the third embodiment. FIG. 10 is a schematic diagram showing a configuration example of a block chain according to a third embodiment. 13 is a flowchart showing a procedure of price fluctuation processing performed by the node device of the block chain system according to the third embodiment.

  A specific example of the trading method according to the embodiment of the present invention will be described below with reference to the drawings. It should be noted that the present invention is not limited to these exemplifications, and is shown by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

<System overview>
FIG. 1 is a schematic diagram for explaining the outline of the trading processing system according to the present embodiment. The transaction processing system according to the present embodiment is a process of giving and receiving a price between a user (seller) who wants to sell an article (sale) and a user (purchaser) who wants to purchase this article. Is a system of electronic commerce that realizes a so-called online flea market or auction. Further, in the transaction processing system according to the present embodiment, virtual currency is used to pay the price of a product to be sold, and information about the virtual currency is managed by the block chain system 1.

  The block chain system 1 has a configuration in which a plurality of node devices 2 are connected via a peer-to-peer type network. Although FIG. 1 shows a state in which three node devices 2 are connected, the block chain system 1 may be configured by connecting more node devices 2. The node device 2 stores a block chain 3 in which data blocks including information about virtual currency are sequentially connected. The block chain 3 is distributed and shared by the plurality of node devices 2, and the plurality of node devices 2 store the block chains 3 having the same content. Further, the block chain system 1 according to the present embodiment has a function of executing a program stored in the block chain 3 on a virtual machine, that is, a so-called smart contract function.

  In the transaction processing system according to the present embodiment, a user who is a seller and a purchaser uses the smartphone (smartphone) 6 of his / her own to access the block chain system 1 to perform the sale and sale of an article for sale. You can The seller uses the smartphone 6 to create sales information including information such as an image of a product to be sold, a name, a description, and a selling price, and sends the created sales information to the block chain system 1. This sales information is stored in the data block of the block chain 3 and shared by the plurality of node devices 2.

  The purchaser can access the block chain system 1 by using the smartphone 6, obtain information on the sale item, and browse the information on the smartphone 6. The smartphone 6 acquires the sales information stored in the data block of the block chain 3 from the node device 2 of the block chain system 1, and displays a list of products for sale based on conditions such as the type or price of the product for sale, for example. The purchaser selects a purchase target from the sale items displayed on the smartphone 6 and pays the virtual currency owned by the purchaser to the seller to purchase payment information indicating that the purchase item is to be purchased from the smartphone 6 using the blockchain system. Send to 1. This payment information is stored in the data block of the block chain 3 and shared by the plurality of node devices 2. In the present embodiment, the purchaser transmits the payment information, so that the owner of the virtual currency corresponding to the amount to be paid temporarily moves from the purchaser to the present system. That is, the present system temporarily deposits the virtual currency moving from the purchaser to the seller until the completion of trading.

  In the transaction processing system according to the present embodiment, when the payment information is stored in the data block of the block chain 3, the virtual currency equivalent to the price is not remitted from the purchaser to the seller. The smartphone 6 of the purchaser uses the function of the smart contract of the block chain system 1 and conditions the payment information and sends it to the block chain system 1. As a result, in the transaction processing system according to the present embodiment, the payment condition is that the purchaser transmits the receipt confirmation information from the smartphone 6 to the block chain system 1 after receiving the sale item, and if the payment condition is satisfied. The virtual currency will be transferred from the buyer to the seller.

  Further, in the trading system according to the present embodiment, the user information such as the ID (identification information) and the address of each user of the seller and the purchaser is managed by the server device 4. A user who wants to use the transaction processing system needs to install a predetermined application (application program) on his / her smartphone 6 and register his / her user information in the server device 4.

  After transmitting the payment information, the purchaser's smartphone 6 confirms that the payment information is stored in the data block of the block chain 3, and then requests the server device 4 to transmit the purchaser's user information to the seller. Send. In response to the request from the purchaser's smartphone 6, the server device 4 reads the purchaser's user information from the database, and transmits the read purchaser's user information to the seller's smartphone 6. The seller can perform the shipping procedure of the sale item based on the user information of the purchaser received by his / her smartphone 6.

  However, the trading system may be configured to store the user information of each user who is a purchaser and a seller in the block chain 3. In this case, the transaction processing system does not have to include the server device 4, and the transaction processing can be performed only by the block chain system 1 and the smartphone 6 of each user.

  The purchaser receives the sale item sent by the seller, and if there is no problem with the received sale item, the purchaser performs a receipt confirmation operation on the smartphone 6. In response to this operation, the smartphone 6 transmits receipt confirmation information to the block chain system 1. In response to the transmission of the receipt confirmation information, the program included in the payment information stored in the blockchain 3 is executed by the function of the smart contract, and the virtual currency is remitted from the purchaser to the seller as the price of the sale item. .

  However, if the purchaser determines that there is a problem with the sale, the purchaser can perform a return request operation on the smartphone 6. In response to this operation, the smartphone 6 sends the return information to the block chain system 1. Thereafter, the purchaser ships the item for sale to the seller. The seller receives the returned product for sale from the purchaser, and if there is no problem with the received product for sale, performs a return confirmation operation on his / her smartphone 6. In response to this operation, the smartphone 6 sends the returned goods confirmation information to the block chain system 1. In response to the transmission of the return confirmation information, the program included in the payment information stored in the block chain 3 is executed by the function of the smart contract, and the virtual currency used as the price of the sale item is remitted (refunded) to the purchaser. .

  In the transaction processing system according to the present embodiment, the purchaser sends payment information to the blockchain system 1, whereby the owner of the virtual currency for payment is transferred from the purchaser to the system. This virtual currency is transferred from the system to the seller in response to the completion of buying and selling, and the transfer of ownership of the virtual currency is called remittance in this embodiment. Further, when the return of goods is completed due to the failure of trading, the ownership of the virtual currency is transferred from the system to the purchaser, and this transfer of the ownership of the virtual currency is called refund in this embodiment.

  However, when the purchaser transmits the payment information to the blockchain system 1, the ownership of the virtual currency may not be transferred from the purchaser to the system, and the purchaser may keep the virtual currency. In this case, the virtual currency is remitted from the purchaser to the seller in response to the completion of the sale. Further, when the return is completed due to the failure of the sale, the virtual currency is not remitted from the purchaser to another person, and the payment by the purchaser is canceled.

  As described above, in the transaction processing system according to the present embodiment, the information regarding the transaction of the product for sale is accumulated in the block chain 3 of the block chain system 1, and the remittance of virtual currency with the progress of the transaction processing is performed by the smart contract. It is automatically executed by the function. Since the block chain system 1 has a configuration in which a plurality of node devices 2 share the same block chain 3, for example, even if any one of the node devices 2 fails or malfunctions, a failure or As long as there is a node device 2 in which no trouble has occurred, the trading process can be performed.

<Device configuration>
FIG. 2 is a block diagram showing the configuration of the node device 2 according to this embodiment. The node device 2 according to this embodiment includes a processing unit (processor) 21, a storage unit (storage) 22, a communication unit (transceiver) 23, and the like. The processing unit 21 is configured using one or more CPUs (Central Processing Units), MPUs (Micro Processing Units), GPUs (Graphics Processing Units), and other arithmetic processing units. The processing unit 21 reads and executes the program 22a stored in the storage unit 22 to perform various processes related to trading of virtual currency and various processes related to trading between users. Further, the processing unit 21 of the node device 2 according to the present embodiment functions as a virtual machine and can execute a program stored in the block chain 3, that is, a so-called smart contract program on the virtual machine.

  The storage unit 22 is configured by using a large-capacity storage device such as a magnetic disk device, and stores the program 22a executed by the processing unit 21 and various data necessary for executing the program. In the present embodiment, the storage unit 22 stores the block chain 3 shared by the plurality of node devices 2 in a distributed manner. The program 22a may be written in the storage unit 22 at the manufacturing stage of the node device 2, for example, the node device 2 may obtain what is distributed by a remote program distribution device by communication, or may be, for example, a memory. What is recorded on the recording medium 98 such as a card or an optical disk may be read by the node device 2 and stored in the storage unit 22. The program 22a may be provided in the form of distribution via a network, or may be provided in the form recorded on the recording medium 98.

  FIG. 3 is a schematic diagram showing a configuration example of the block chain 3 according to the present embodiment. The block chain 3 according to this embodiment is information having a data structure in which a plurality of blocks are connected in a chain. FIG. 3 illustrates an example in which three blocks, Nth, N + 1th, and N + 2th, are connected. Each block may include a hash value calculated based on the information of the immediately preceding block and information such as virtual currency information, sales information, or payment information. In FIG. 3, each block stores three pieces of information, but this is an example, and each block may store two pieces or less or four pieces or more of information. Further, the number of pieces of information stored in each block may be variable. The type of information stored in each block is also arbitrary.

  The virtual currency information is information relating to transactions of virtual currency managed by the block chain system 1. The virtual currency information includes, for example, information about the price of virtual currency sent from one user to another user. By tracing a plurality of blocks connected to the block chain 3 and collecting virtual currency information, it is possible to grasp the total amount of virtual currency possessed by each user. Virtual currency trading is an existing technology, and for example, Ethereum technology can be adopted. In the present embodiment, detailed description of the processing relating to virtual currency transactions is omitted.

  The sales information stored in the block chain 3 is information created by the smartphone 6 of a user who wants to sell a product for sale by using the sales processing system according to the present embodiment. The sale information may include information such as a sale item ID, a seller ID, a sale item name, a sale item image, a description, and a sale price. The sale item ID is identification information attached to the sale item. The seller ID is so-called user ID, which is identification information attached to a user who wants to sell a product for sale.

  The sale item ID and the user ID are generated by the smartphone 6 of each user, for example. The user ID may be, for example, identification information used for trading virtual currency, that is, a so-called wallet address. In this case, the user ID is generated by the smartphone 6 based on a random number. The sale item ID may be generated by the smartphone 6 based on a random number like the wallet address. Further, for example, the sale item ID may be information in which a numerical value of a predetermined digit is connected to the user ID, and in this case, the sale item ID may be generated by the smartphone 6.

  In addition, the user ID and the sale item ID may be generated by the server device 4. For example, when the user starts using the trading system, the server device 4 may be requested to issue a user ID. Further, the seller may request the server device 4 to issue the sale item ID when selling the sale item. The server device 4 generates an ID in response to the request from the smartphone 6 and transmits the generated ID to the smartphone 6. The server device 4 may store the user ID and the sale item ID that have been issued so far, and may issue the IDs so that the IDs do not overlap. The user ID may be generated by the server device 4, and the sale item ID may be generated by the smartphone 6.

  The sale item name is the name of the sale item and is character string information input by the user of the seller using the smartphone 6. The sale item image is, for example, an image obtained by capturing an image of the sale item with a camera. The descriptive text is an arbitrary text regarding the sale item and is character string information input by the user of the seller using the smartphone 6. The selling price is a selling price given to a product for sale by the user of the seller, and a price based on a virtual currency managed by the block chain system 1 is set.

  The payment information stored in the block chain 3 is information created by the smartphone 6 of a user who desires to purchase a sale item by using the transaction processing system according to the present embodiment. The payment information may include information such as a sale item ID, a purchaser ID, and a payment price. The sale item ID corresponds to the sale item ID included in the above-mentioned sale information, and is the identification information attached to the sale item that the user of the purchaser desires to purchase. The purchaser ID is identification information attached to a user who desires to purchase a product for sale, a so-called user ID. The payment price is the price paid by the purchaser for the purchase. The payment price may be set to a value obtained by adding the selling price of the product to be sold and the commission paid to the system. The fee may be paid to, for example, a person who has performed processing related to consensus building of the blockchain 3 in the blockchain system 1, that is, a miner who has performed so-called mining processing, and for example, an operating company that operates the server device 4. Etc. may be paid. The fee does not necessarily have to be included in the payment price of the payment information, and for example, the user may separately pay the operating company or the like, or may be a system in which no fee is required, for example.

  Further, in the present embodiment, the payment information includes a payment condition program. This payment condition program is a program executed on the virtual machine of the block chain system 1, and is a so-called smart contract program. The payment condition program determines whether or not the conditions for sending the virtual currency corresponding to the payment price set in the payment information from the purchaser to the seller are satisfied. In the present embodiment, the payment condition program remits virtual currency on condition that the purchaser gives confirmation of receipt of the sale item.

  Further, in the present embodiment, the electronic signature is attached to the sales information and the payment information. The electronic signature is information created using the private key of the user who created the sales information or payment information, and it is possible to verify the validity of the sales information or payment information by using the corresponding public key. To do. For example, the user's smartphone 6 can calculate a hash value based on the created sales information or payment information, and can add the calculated hash value encrypted with a secret key to the sales information or payment information as an electronic signature. . Further, the sales information or the payment information may include a public key for verifying the electronic signature.

  Returning to FIG. 2, the communication unit 23 of the node device 2 is configured to include a circuit that performs processing relating to communication and the like, and via the network NW such as the Internet, a wireless LAN (Local Area Network), and a mobile phone communication network. And communicates with other node devices 2 and devices such as the smartphone 6. The communication unit 23 transmits the transmission data given from the processing unit 21 to another device. The communication unit 23 also receives data transmitted from another device and gives the received data to the processing unit 21.

  Further, in the processing unit 21, the shared processing unit 21a, the sales information processing unit 21b, the payment information processing unit 21c, the payment processing unit 21d, and the like function as software by executing the program 22a stored in the storage unit 22. It is realized as a block. The sharing processing unit 21a performs processing for sharing the block chain 3 among the plurality of node devices 2. For example, the sharing processing unit 21a performs a process for forming an agreement with another node device 2 for adding a block to the block chain 3. In the consensus building process, for example, when the blockchain system 1 is a public blockchain (that is, a blockchain in which an unspecified number of node devices 2 can participate), “Proof of Work” or “Proof of Stake”, etc. The method of can be adopted. On the other hand, when the blockchain system 1 is a private type blockchain (that is, a blockchain composed of only specific node devices 2), even if the plurality of node devices 2 form an agreement by, for example, a majority vote. Good. The method of forming an agreement between the plurality of node devices 2 may be appropriately determined according to the scale of the block chain system 1. Since the process related to sharing the block chain 3 is an existing technique, detailed description of the process is omitted in this specification.

  The sales information processing unit 21b receives the sales information transmitted from the smartphone 6 of the user of the seller, and stores the received sales information in the block of the block chain 3. The payment information processing unit 21c receives the payment information transmitted from the smartphone 6 of the user of the purchaser, and stores the received payment information in the block of the block chain 3. The sales information stored in the block by the sales information processing unit 21b and the payment information stored in the block by the payment information processing unit 21c are shared by the sharing processing unit 21a by the sharing processing of the block chain 3, and the plurality of node devices 2 are processed. Shared between.

  The payment processing unit 21d executes the payment condition program of the payment information stored in the block of the block chain 3 on the virtual machine to transfer the virtual currency corresponding to the price of the sale item from the purchaser to the seller. I do. Specifically, the payment processing unit 21d performs a remittance process from the purchaser to the seller on condition that the receipt confirmation information transmitted from the purchaser's smartphone 6 is received. In addition, when the sale item is returned, the payment processing unit 21d performs a process of refunding the virtual currency paid by the purchaser to the purchaser. Specifically, the payment processing unit 21d receives the return request information transmitted from the purchaser's smartphone 6 and then receives the return confirmation information transmitted from the seller's smartphone 6 to the purchaser. Perform refund processing. It should be noted that processing of remittance, refund, and the like may adopt processing of an existing virtual currency system, and thus detailed description of the processing content will be omitted in the present embodiment.

  FIG. 4 is a block diagram showing the configuration of the server device 4 according to the present embodiment. The server device 4 according to the present embodiment includes a processing unit (processor) 41, a storage unit (storage) 42, a communication unit (transceiver) 43, and the like. The processing unit 41 is configured by using an arithmetic processing device such as a CPU or MPU. The processing unit 41 reads out and executes the server program 42a stored in the storage unit 42 to perform various arithmetic processes related to management of user information.

  The storage unit 42 is configured by using a large-capacity storage device such as a magnetic disk device, and stores a server program 42a executed by the processing unit 41 and various data necessary for executing the server program 42a. The server program 42a may be written in the storage unit 42, for example, at the manufacturing stage of the server apparatus 4, or the server apparatus 4 may obtain what is distributed by a remote program distribution apparatus by communication, or, for example, What is recorded on the recording medium 99 such as a memory card or an optical disk may be read by the server device 4 and stored in the storage unit 42. The server program 42a may be provided in the form of distribution via a network, or may be provided in the form recorded on the recording medium 99.

  Further, in the present embodiment, the storage unit 42 is provided with a user information DB (database) 42b for storing and accumulating information about users who use the trading system. FIG. 5 is a schematic diagram showing a configuration example of the user information DB 42b according to the present embodiment. The user information DB 42b according to this embodiment stores, for example, information such as user IDs, names, addresses, telephone numbers, and mail addresses in association with each other. The user ID is identification information uniquely given to the user, and is information that can be set as the seller ID or the purchaser ID in the sales information or payment information stored in the block chain 3. The information such as the name, address, telephone number, and email address stored in association with the user ID is the user's personal information necessary for delivery of the sale item, etc., and is registered by the user when starting to use the trading system. Information to be provided.

  Returning to FIG. 4, the communication unit 43 of the server device 4 is configured to include a circuit that performs processing relating to communication, and each user can access the network NW such as the Internet, a wireless LAN, and a mobile phone communication network. Communication is carried out with a device such as the smartphone 6 in possession. The communication unit 43 transmits the transmission data provided from the processing unit 41 to another device. Further, the communication unit 43 receives data transmitted from another device and gives the received data to the processing unit 41.

  In addition, the processing unit 41 executes the server program 42a stored in the storage unit 42, so that the user information management processing unit 41a, the user information notification processing unit 41b, and the like are realized as software functional blocks. The user information management processing unit 41a issues a user ID to a user who starts using the trading system, receives the input of information such as a name, an address, a telephone number, and an email address from the user, and stores it in the storage unit 42. A process of registering in the user information DB 42b is performed.

  The user information notification processing unit 41b performs a process of transmitting the information of this user to the smartphones 6 of other users in response to the notification request given from the smartphone 6 of the user. For example, when the purchaser needs to notify the seller of information such as his / her name and address as the destination of the purchased product, the purchaser gives the server device 4 a notification request specifying the seller ID on the smartphone 6. . Upon receiving this notification request, the user information notification processing unit 41b of the server device 4 reads information such as the name and address of the purchaser from the user information DB 42b, and the smartphone 6 of the user with the seller ID specified in the notification request. Send to.

  In the trading system according to the present embodiment, information such as names and addresses, which are personal information of the seller and the user of the purchaser, is managed by the server device 4 instead of being managed by the block chain 3. Although it is configured, it is not limited to this. The personal information of the user may be managed by the block chain 3. In the case of this configuration, the server device 4 may not be included in the trading system. Further, when the user's personal information is not required for delivering the sale item, for example, when anonymous delivery capable of delivering the sale item by designating the user ID is available, the transaction processing system includes the server device 4. It doesn't have to be.

  FIG. 6 is a block diagram showing the configuration of the smartphone 6 according to this embodiment. The smartphone 6 according to the present embodiment includes a processing unit (processor) 61, a storage unit (storage) 62, a communication unit (transceiver) 63, a camera 64, a display unit (display) 65, an operation unit 66, and the like. ing. The processing unit 61 is configured by using an arithmetic processing device such as a CPU or MPU. The processing unit 61 reads out and executes the application (application program) 62a stored in the storage unit 62 to perform various processes necessary for selling and purchasing the sale item.

  The storage unit 62 is configured by using a nonvolatile memory element such as a flash memory, and stores various programs executed by the processing unit 61 and various data necessary for executing the programs. In the present embodiment, the storage unit 62 stores an application 62a executed by the processing unit 61. The application 62a according to the present embodiment is a program that performs processing relating to both a case where a user sells a sale item and a case where the user purchases the sale item. The application 62a may be written in the storage unit 62, for example, at the manufacturing stage of the smartphone 6, or the smartphone 6 may acquire the application 62a by communication from a server device that distributes various applications, for example, a memory. What is recorded on a recording medium such as a card may be read by the smartphone 6 and stored in the storage unit 62. The application 62a may be provided in the form of distribution via a network, or may be provided in the form recorded on a recording medium.

  The storage unit 62 also stores key information 62b. The key information 62b can be, for example, a set of information including a private key and a public key, and is information corresponding to a wallet address in a virtual currency transaction. The key information 62b is used in a virtual currency transaction using the block chain system 1 and a trading process between users. The key information 62b is determined by an arbitrary method when the use of the virtual currency in the block chain system 1 is started or when the use of the trading system is started. In the trading system according to the present embodiment, key information is used for processing such as creation and confirmation of an electronic signature attached to sales information and payment information.

  The communication unit 63 uses, for example, a mobile phone communication network or a wireless communication network such as a wireless LAN, and communicates with other devices via a network NW such as the Internet. In the present embodiment, the communication unit 63 communicates with the node device 2, the server device 4 and the like via the network NW. The communication unit 63 transmits the data by modulating the data for transmission given from the processing unit 61 and outputting the signal obtained to the antenna. Further, the communication unit 63 demodulates the signal received by the antenna, converts it into digital data, and supplies this data to the processing unit 61 as received data.

  The camera 64 is provided, for example, on the back surface of the housing of the smartphone 6, and provides the processing unit 61 with an image captured according to a user operation. The camera 64 according to the present embodiment is used, for example, when a user of a seller captures an image of a product for sale. The display unit 65 is configured by using a liquid crystal panel or the like, and displays various images according to the processing of the processing unit 61. The operation unit 66 receives the operation by the user and notifies the processing unit 61 of the received operation content. The operation unit 66 is configured using, for example, a touch panel provided on the surface of the display unit 65, a push switch provided on the housing of the smartphone 6, and the like.

  In addition, the processing unit 61 executes the application 62a stored in the storage unit 62 so that the sales information processing unit 61a, the display processing unit 61b, the payment information processing unit 61c, the receipt confirmation information processing unit 61d, and the returned goods information processing. The unit 61e, the returned goods confirmation information processing unit 61f and the like are realized as software functional blocks. When the user of the smartphone 6 wants to sell the sale item as a seller, the sale information processing unit 61a performs a process of generating sale information about the sale item and transmitting it to the block chain system 1. The sale information processing unit 61a receives, for example, an input of the name, description, price, and the like of the sale item according to the user's operation on the operation unit 66, and acquires the image of the sale item imaged by the camera 64. The sale information processing unit 61a generates a sale item ID for this sale item, and uses the user ID as a seller ID to generate sale information including the above information. Further, the sales information processing unit 61 a generates and attaches an electronic signature using the key information 62 b stored in the storage unit 62 to the generated sales information, and transmits the electronic signature to the block chain system 1.

  When the user of the smartphone 6 desires to purchase a product for sale as a purchaser, the display processing unit 61b displays a list of information on the articles that can be purchased on the display unit 65. The display processing unit 61b retrieves and acquires the sales information stored in the block chain 3 of the block chain system 1, and displays a list of names and images of products for sale on the display unit 65 based on the acquired sales information. At this time, the display processing unit 61b may receive the condition designation of the sale item to be displayed from the user and display it, and sort and display the sale item information in an appropriate order such as a name order or a price order. Good.

  The payment information processing unit 61c performs processing of generating payment information for purchasing the sale item and transmitting the payment information to the block chain system 1 after the user selects a purchase target from the sale items displayed on the display unit 65. To do. The payment information processing unit 61c receives an input from the user regarding the price to be paid for the selected sale item. At this time, the payment information processing unit 61c may accept the payment price as well as the fee price from the user. However, when the sales price set for the sale item is used as the payment price, the payment information processing unit 61c may determine the payment price without the user's input. The payment information processing unit 61c generates payment information including the payment price, the sale item ID of the selected sale item, and the purchaser user ID. In addition, the payment information processing unit 61c attaches to the payment information a payment condition program that defines the conditions for sending the virtual currency corresponding to the price of the sale item to the seller. The payment information processing unit 61c generates an electronic signature using the payment information including the payment condition program and the key information 62b stored in the storage unit 62, attaches the generated electronic signature to the payment information, and then the blockchain system 1 Send to.

  After transmitting the payment information, the payment information processing unit 61c confirms that the payment information is stored in the block chain 3 of the block chain system 1, and confirms that the server device 4 is the user of the purchaser with respect to the user of the seller. Send a notification request for information. Whether or not to notify the purchaser's user information may be determined by the purchaser's user.

  The seller notified of the user information of the purchaser can deliver the sale item based on the user information. The purchaser who has received the delivered sale item confirms the content of the sale item, and if there is no problem, performs a receipt confirmation operation on his / her smartphone 6. The receipt confirmation information processing unit 61d receives an operation for confirming receipt of a product for sale, based on a user operation on the operation unit 66. When the receipt confirmation information processing unit 61d receives a receipt confirmation operation by the purchaser, the receipt confirmation information processing unit 61d transmits receipt confirmation information including information such as the sale item ID and the purchaser ID to the blockchain system 1. In accordance with the receipt confirmation information, the blockchain system 1 executes the payment condition program included in the payment information on the virtual machine, and the virtual currency of the payment price specified by the payment information is remitted to the seller.

  Further, the purchaser can return the product for sale if there is a problem with the product for sale. The purchaser who wishes to return the product performs a return request operation using his / her smartphone 6. The merchandise return information processing unit 61e accepts a merchandise return request operation based on a user operation on the operation unit 66. The returned goods information processing unit 61e that has received the operation of the returned goods request transmits the returned goods request information including information such as the sale item ID and the purchaser ID of the sale item to be returned to the block chain system 1. The purchaser performs a return request operation on the smartphone 6 and then returns the sale item to the seller.

  The seller who receives the returned sale item confirms the content of the returned sale item, and if there is no problem, performs a return confirmation operation on his / her smartphone 6. The returned goods confirmation information processing unit 61f receives a returned goods confirmation operation based on a user operation on the operation unit 66. The returned goods confirmation information processing unit 61f that has received the operation for confirming the returned goods transmits the returned goods confirmation information including information such as the sale item ID and the sale item ID regarding the returned sale item to the block chain system 1. In accordance with this return confirmation information, the blockchain system 1 executes the payment condition program included in the payment information on the virtual machine, and the virtual currency of the payment price specified in the payment information is returned to the purchaser.

<Trading processing>
7 and 8 are timing charts showing an example of a trading process performed by the trading system according to the present embodiment. FIG. 7 shows an example in the case where the sale of the sale item is successful, and FIG. 8 shows an example in which the sale item is returned without the sale item being sold. In the transaction processing system according to the present embodiment, a seller who wants to sell a product for sale generates sales information including information about the product for sale with his or her smartphone 6, and transmits it to the block chain system 1. The block chain system 1 receives the sales information transmitted from the smartphone 6 of the seller and stores it in the block of the block chain 3.

  The purchaser who wants to purchase the sale item acquires the sale information from the block chain system 1 by his / her smartphone 6 to cause the smartphone 6 to display the list of the sale item that can be purchased. You can select the purchase target from the items. The smartphone 6 that has received the selection operation of the purchase target by the purchaser receives payment information including information such as the payment price for the sale target product and a payment condition program (smart contract) for determining the payment condition to the seller. It is generated and transmitted to the block chain system 1. The block chain system 1 receives the payment information transmitted from the purchaser's smartphone 6 and stores it in the block of the block chain 3.

  After that, the purchaser's smartphone 6 transmits a notification request for notifying the seller of the purchaser's user information to the server device 4. Upon receiving the notification request, the server device 4 reads the user information of the purchaser who made the request from the user information DB 42b and sends it to the smartphone 6 of the seller. The seller who has received the purchaser's user information on the smartphone 6 can ship the sale item to the purchaser based on the received user information.

  The purchaser, who has received the sale item sent by the seller, confirms the received sale item and, if there is no problem, performs a receipt confirmation operation on his / her smartphone 6 (see FIG. 7). In response to this, the purchaser's smartphone 6 transmits receipt confirmation information indicating that the sale item has been received to the block chain system 1. In the present embodiment, the purchase confirmation information is directly transmitted from the purchaser's smartphone 6 to the block chain system 1. For example, the smartphone 6 transmits the reception confirmation information to the server device 4, The server device 4 that receives the message may send the receipt confirmation information to the block chain system 1.

  In the blockchain system 1 that has received the receipt confirmation information, the payment condition program included in the payment information stored in the blockchain 3 is executed, and the virtual currency of the payment price included in the payment information is remitted to the seller. . For example, the purchaser's user ID is set as the remittance source, the seller's user ID is set as the remittance destination, and the transaction in which the price information of the virtual currency to be remitted is set is generated by the payment condition program, and is transmitted to the blockchain 3. Is stored. This transaction corresponds to the virtual currency information shown in FIG.

  On the other hand, when it is determined that the received sale product has a problem and the customer requests the return of the sale product, the purchaser performs a return request operation with his / her smartphone 6 (see FIG. 8). In response to this, the smartphone 6 of the purchaser transmits the product return request information to the block chain system 1. In the blockchain system 1 that has received the return request information, the payment condition program included in the payment information is executed, and the product returns to the waiting state for the return confirmation of the sale item.

  Here, for example, the blockchain system 1 gives a notice of return to the smartphone 6 of the seller by executing the payment condition program, or the seller accesses the blockchain system 1 with the smartphone 6 to block. By confirming the return request information stored in the chain 3, the seller can know that the return request has been made. If it is necessary to inform the delivery destination for the return, the seller requests the server device 4 to notify the user information by using the smartphone 6. In response to this notification request, the server device 4 reads the user information of the seller from the user information DB 42b, and sends the read user information to the smartphone 6 of the purchaser. However, for example, when the seller's address is notified as the delivery source when the seller sells the sale item to the purchaser, the seller's user information is not notified via the server device 4. You don't have to.

  The purchaser requesting the return returns the merchandise to the seller. The seller who receives the returned sale item confirms the received sale item, and if there is no problem, performs a return confirmation operation with his or her own smartphone 6. In response to this, the purchaser's smartphone 6 transmits the product return confirmation information to the block chain system 1. Return Block Confirmation Information In the blockchain system 1 that has received the payment condition program included in the payment information, the virtual currency of the payment price included in the payment information is refunded to the purchaser.

<Flowchart>
FIG. 9 is a flowchart showing a procedure of a sales information transmission process performed by the smartphone 6 according to the present embodiment. The sales information processing unit 61a of the processing unit 61 of the smartphone 6 according to the present embodiment is for inputting information regarding a sale item when a sale item is selected from a menu screen displayed on the display unit 65, for example. The screen is displayed, and the input of information on the sale item is accepted based on the user operation on the operation unit 66 (step S1). Next, the sales information processing unit 61a generates sales information in the form shown in the lower left of FIG. 3 based on the received input information (step S2). At this time, the sale information processing unit 61a determines the sale item ID for the sale item, acquires the user ID of the seller, acquires the image information of the sale item, and receives the name of the sale item accepted in step S1. Information such as a description and a selling price is treated as one piece of information, and a piece of information to which an electronic signature is attached is sales information. The sales information processing unit 61a transmits the generated sales information to the block chain system 1 via the communication unit 63 (step S3), and ends the process.

  FIG. 10 is a flowchart showing a procedure of sales information reception processing performed by the node device 2 of the block chain system 1 according to the present embodiment. The sales information processing unit 21b of the processing unit 21 of the node device 2 according to the present embodiment receives the sales information transmitted from the smartphone 6 of the seller at the communication unit 23 (step S11). The sales information processing unit 21b stores the received sales information in the block of the block chain 3 of the storage unit 22 (step S12). After that, the shared processing unit 21a of the processing unit 21 of the node device 2 performs various processes for sharing the block chain 3 with the plurality of node devices 2 (step S13), and the storage in step S12 is thereby performed. The sold sales information is shared by the plurality of node devices 2.

  FIG. 11 is a flowchart showing a procedure of payment information transmission processing performed by the smartphone 6 according to the present embodiment. The display processing unit 61b of the processing unit 61 of the smartphone 6 according to the present embodiment stores in the block chain 3 of the block chain system 1 when a purchase item is selected from a menu screen displayed on the display unit 65, for example. The obtained one or more sales information is acquired (step S21). The display processing unit 61b displays, on the display unit 65, a list of items for sale that can be purchased by the purchaser based on the acquired sales information (step S22).

  The payment information processing unit 61c of the processing unit 61 receives the selection of the sale item to be purchased based on the user operation on the operation unit 66 while the sale item list is displayed (step S23). The payment information processing unit 61c generates payment information for the sale item for which the selection has been accepted (step S24). At this time, the payment information processing unit 61c may accept the input of the payment price for the selected sale item from the user. The payment information processing unit 61c attaches to the information such as the sale item ID of the selected sale item, the purchaser's user ID, and the payment price, the payment condition program for determining the payment condition by the smart contract, and the information. The payment information is the one with an electronic signature to. The payment information processing unit 61c transmits the generated payment information to the block chain system 1 via the communication unit 63 (step S25). After that, the payment information processing unit 61c transmits a notification request for notifying the seller of the user information of the purchaser to the server device 4 through the communication unit 63 (step S26), and ends the process.

  FIG. 12 is a flowchart showing the procedure of the payment information reception process performed by the node device 2 of the block chain system 1 according to this embodiment. The payment information processing unit 21c of the processing unit 21 of the node device 2 according to the present embodiment receives the payment information transmitted from the purchaser's smartphone 6 at the communication unit 23 (step S31). The payment information processing unit 21c determines whether or not the payment price included in the received payment information satisfies the sales price included in the sales information regarding the sale target item to be purchased (step S32). When the payment price does not satisfy the selling price (S32: NO), the payment information processing unit 21c ends the process without storing the received payment information in the block of the block chain 3.

  When the payment price satisfies the selling price (S32: YES), the payment information processing unit 21c stores the received payment information in the block of the block chain 3 of the storage unit 22 (step S33). After that, the shared processing unit 21a of the processing unit 21 of the node device 2 performs various processes for sharing the block chain 3 with the plurality of node devices 2 (step S34), and thereby stores the data in step S33. The obtained payment information is shared by the plurality of node devices 2. In addition, in the present embodiment, the node device 2 determines whether or not the payment price satisfies the selling price, that is, whether the payment price is equal to or higher than the selling price. However, the present invention is not limited to this. Absent. The configuration may be such that the smartphone 6 makes this determination, and in this configuration, the smartphone 6 does not transmit the payment information determined that the payment price does not satisfy the selling price to the node device 2.

  FIG. 13 is a flowchart showing the procedure of the notification process performed by the server device 4 according to the present embodiment. The user information notification processing unit 41b of the processing unit 41 of the server device 4 according to the present embodiment receives the notification request transmitted from the smartphone 6 at the communication unit 43 (step S41). The notification request includes, for example, information on a user ID that specifies user information to be notified and a user ID that is a notification destination of the user information. The user information notification processing unit 41b reads the user information to be notified from the user information DB 42b of the storage unit 42 based on the information included in the received notification request (step S42). Next, the user information notification processing unit 41b transmits the user information read from the user information DB 42b to the smartphone 6 of the designated notification destination user based on the information included in the received notification request (step S43), The process ends.

  FIG. 14 is a flowchart showing a procedure of processing of confirmation of receipt and return of goods performed by the smartphone 6 according to the present embodiment. The receipt confirmation information processing unit 61d of the processing unit 61 of the smartphone 6 according to the present embodiment determines whether or not a receipt confirmation operation has been performed based on a user operation on the operation unit 66 (step S51). When the receipt confirmation operation is performed (S51: YES), the receipt confirmation information processing unit 61d generates receipt confirmation information, and the communication unit 63 transmits the generated receipt confirmation information to the blockchain system 1 (step S52). ), The processing ends. The receipt confirmation information includes, for example, a sale item ID relating to the received sale item and information indicating that the sale item has been received. When the receipt confirmation operation has not been performed (S51: NO), the receipt confirmation information processing section 61d advances the process to step S53.

  Next, the merchandise return information processing unit 61e of the processing unit 61 determines whether or not a merchandise return request operation has been performed based on a user operation on the operation unit 66 (step S53). When the return request operation is performed (S53: YES), the return information processing unit 61e generates the return request information and transmits the generated return request information to the block chain system 1 by the communication unit 63 (step S54). , The process ends. The return item request information includes, for example, a sale item ID related to the sale item for which a return item is requested, and information indicating that the sale item is returned. When the return request operation is not performed (S53: NO), the return information processing unit 61e advances the process to step S55.

  Next, the returned goods confirmation information processing unit 61f of the processing unit 61 determines whether or not a returned goods confirmation operation has been performed based on a user operation on the operation unit 66 (step S55). When the return confirmation operation is not performed (S55: NO), the return confirmation information processing section 61f returns the process to step S51. When the return confirmation operation is performed (S55: YES), the return confirmation information processing unit 61f generates return confirmation information, and the generated return confirmation information is transmitted to the block chain system 1 by the communication unit 63 (step S56). ), The processing ends. The returned merchandise confirmation information includes, for example, a merchandise sale ID related to the merchandise that has been returned, and information indicating that the merchandise return has been confirmed.

  FIG. 15 is a flowchart showing the procedure of the payment condition determination process performed by the node device 2 of the block chain system 1 according to this embodiment, in which the payment condition program included in the payment information is executed on the virtual machine of the node device 2. This is the process performed by The payment processing unit 21d of the processing unit 21 of the node device 2 according to the present embodiment determines whether or not the receipt confirmation information transmitted from the smartphone 6 of the purchaser has been received by the communication unit 23 (step S61). . When the receipt confirmation information is received (S61: YES), the payment processing unit 21d performs a process of sending the virtual currency corresponding to the purchase price among the payment prices included in the payment information to the seller (step S62), The process ends.

  When the receipt confirmation information has not been received (S61: NO), the payment processing unit 21d determines whether the return request information transmitted from the purchaser's smartphone 6 has been received (step S63). When the return request information is not received (S63: NO), the payment processing unit 21d returns the process to step S61. When the return request information is received (S63: YES), the payment processing unit 21d determines whether or not the return confirmation information transmitted from the smartphone 6 of the seller is further received (step S64). When the returned goods confirmation information has not been received (S64: NO), the payment processing unit 21d waits until the returned goods confirmation information is received. When the returned goods confirmation information is received (S64: YES), the payment processing unit 21d performs processing of refunding the virtual currency corresponding to the payment price included in the payment information to the purchaser (step S65), and ends the processing.

<Summary>
In the transaction processing system according to the present embodiment having the above configuration, the plurality of node devices 2 communicating with each other share the block chain 3 in which the plurality of data blocks are associated in order. The node device 2 receives the sales information on the sale item from the smartphone 6 of the seller and stores it in the data block of the block chain 3. The sales information stored in the block chain 3 can be browsed by the purchaser using the smartphone 6. The node device 2 receives payment information for paying the price of the sale item in virtual currency from the smartphone 6 of the purchaser who desires to purchase the sale item, and stores the payment information in the data block of the block chain 3. However, the payment information includes a payment condition program of a smart contract that determines whether or not the sale item is received, and the payment is not made when the payment information is stored in the blockchain 3, but the sale item is sold. Payment is made after receipt of the. By executing this payment condition program on the virtual machine, when the node device 2 receives the receipt confirmation information from the smartphone 6 of the purchaser, the node device 2 remits the virtual currency that is the price of the sale item to the seller. By performing the trading process performed between the seller and the purchaser by using the block chain 3 shared by the plurality of node devices 2, even if any one of the node devices 2 fails or malfunctions, the trading is performed. It becomes possible to perform processing.

  Further, in the transaction processing system, the sales information includes information on the selling price of the product, and the payment information includes information on the payment price for the product. When the node device 2 receives the payment information from the purchaser's smartphone 6, the node device 2 determines whether or not the payment price included in the payment information satisfies the selling price of the product to be purchased. As a result, the sale item is sold at the sale price set by the seller.

  Further, in the transaction processing system, the purchaser can make a request to return the product for sale. When receiving the return request information from the purchaser's smartphone 6, the node device 2 finally refunds the virtual currency related to the payment information to the purchaser. As a result, it is possible to prevent the purchaser from suffering a disadvantage, for example, when the product for sale has a defect.

  In the transaction processing system, when the node device 2 receives the return request information from the purchaser's smartphone 6 and also receives the return confirmation information from the seller's smartphone 6, the virtual currency related to the payment information is sent to the purchaser. Refund. This can prevent the seller from being disadvantaged by a malicious purchaser.

  Although the device used by the seller and the purchaser is the smartphone 6 in the present embodiment, the present invention is not limited to this, and various information processing devices such as a PC or a tablet terminal device may be used. . In the trading system, the user information is managed by the server device 4 and the user information is exchanged via the server device 4, but the present invention is not limited to this. For example, the user information may be directly transmitted and received between the users of the seller and the purchaser, for example, by using e-mail. In this case, the sales information and the payment information may include information such as the user's email address. Further, for example, the transaction processing system may be configured such that the sale item is sent to a delivery center or the like defined by the seller, the delivery center manages user information, and the sale item is delivered to the purchaser. Further, the sale item does not necessarily have to be an item that needs to be delivered, and may be digital contents, skills, services, or the like.

<Second Embodiment>
FIG. 16 is a schematic diagram for explaining the outline of the transaction processing system according to the second embodiment. The trading system according to the second embodiment has a configuration in which a second server device 5 is further provided in addition to the trading system shown in FIG. In the trading system according to the second embodiment, the sales information is not directly transmitted from the smartphone 6 of the seller to the block chain system 1, but the sales information is transmitted from the smartphone 6 to the second server device 5. , Is transmitted from the second server device 5 to the block chain system 1. In the trading system according to the second embodiment, the payment information, the receipt confirmation information, the return request information, the return confirmation information and the like may be directly transmitted from the smartphone 6 to the block chain system 1.

  The second server device 5 receives the sale information transmitted from the smartphone 6 of the seller, and determines the suitability of the sale item based on the received sale information. When the second server device 5 determines that the sale item related to the sale information is proper, the second server device 5 transmits the sale information to the block chain system 1. On the other hand, when it is determined that the sale item is inappropriate, the second server device 5 discards the sale information without transmitting it to the block chain system 1. In addition, the second server device 5 generates sales suitability information including the determination result of the suitability of the product for sale, and transmits the sales suitability information to the block chain system 1.

  In addition, in the sale processing system according to the present embodiment, the seller and the purchaser regarding the sale of the sale item are evaluated, and the evaluation information as the evaluation result is stored in the block chain 3 of the block chain system 1. The second server device 5 generates evaluation information that evaluates the seller based on the result of the suitability determination of the sold product, and transmits the evaluation information to the block chain system 1. The purchaser of the sale item, for example, after confirming receipt of the sale item or making a return request, generates evaluation information for evaluating the seller on the smartphone 6, and transmits the evaluation information to the block chain system 1. The seller of the sale item generates evaluation information that evaluates the purchaser on the smartphone 6 and transmits it to the block chain system 1, for example, after the price of the sale item is remitted or after confirming the return. The evaluation information transmitted from the second server device 5 and the smartphone 6 is stored in the block chain 3 of the block chain system 1 and shared.

  FIG. 17 is a schematic diagram showing a configuration example of the block chain 3 according to the second embodiment. The sales aptitude information stored in the block chain 3 according to the second embodiment is information created by the second server device 5. The sales suitability information may include information such as a sale item ID, a seller ID, and a sales suitability. The sale item ID is identification information attached to the sale item. The seller ID is a user ID given to a user who is a seller. The sales aptitude is the result of the second server device 5 determining the sales aptitude of the product for sale based on the sales information from the seller. In the present embodiment, the sales suitability is set to either sellable or unsellable, for example.

  The evaluation information stored in the block chain 3 is information in which the second server device 5, the seller or the purchaser evaluated the seller or the purchaser, and is created by the second server device 5 or the smartphone 6. Information. The evaluation information may include information such as a sale item ID, an evaluation target person ID, an evaluator ID, and an evaluation value. The sale item ID is identification information attached to the sale item. The evaluation target person ID is a user ID of a seller or a purchaser who is an evaluation target. The evaluator ID is an ID for identifying the person who has performed the evaluation, and in the present embodiment, the user ID of the seller or the purchaser or the server ID attached to the second server device 5 is set. To be done. The evaluation value is an evaluation with respect to the evaluation target person, and in the present embodiment, the value is set in a 5-step evaluation in which the highest evaluation is 5 and the lowest evaluation is 1.

  FIG. 18 is a block diagram showing the configuration of the second server device 5 according to the second embodiment. The second server device 5 according to the second embodiment is configured to include a processing unit (processor) 51, a storage unit (storage) 52, a communication unit (transceiver) 53, and the like. The processing unit 51 is configured using an arithmetic processing device such as a CPU or MPU. The processing unit 51 reads and executes the server program 52a stored in the storage unit 52 to perform various arithmetic processes related to the suitability determination of the sale item.

  The storage unit 52 is configured by using a large-capacity storage device such as a magnetic disk device, and stores a server program 52a executed by the processing unit 51 and various data necessary for executing the server program 52a. The server program 52a may be written in the storage unit 52, for example, at the manufacturing stage of the second server device 5, or, for example, the second server device 5 obtains what is distributed by a remote program distribution device by communication. Alternatively, the second server device 5 may read the data recorded in the recording medium 97 such as a memory card or an optical disk and store it in the storage unit 52. The server program 52a may be provided in the form of distribution via a network, or may be provided in the form recorded in the recording medium 97.

  In addition, in the present embodiment, the storage unit 52 stores an aptitude determination model 52b for performing an adequacy determination of a product for sale. FIG. 19 is a schematic diagram showing the configuration of the suitability determination model 52b according to the second embodiment. The aptitude determination model 52b according to the second embodiment is a learning model having a structure of a neural network in which a plurality of neurons are connected to each other, and is a learned model that has been learned in advance by deep learning.

  A neuron shown by a circle in the figure performs an operation on a plurality of inputs and outputs one value Z as an operation result. The neuron has information such as a weighting coefficient and a threshold used for the calculation. The neural network has a configuration in which a plurality of neurons are hierarchically connected. The neural network shown in FIG. 19 includes an input layer that receives m input values, an intermediate layer that performs arithmetic processing on data received by the input layer, and an operation result of the intermediate layer that is aggregated into one neural layer. And an output layer that outputs a value. Although the middle layer has two layers in the illustrated example, this is an example, and the middle layer may have one layer or three or more layers. The deep learning is a process of setting appropriate values for the coefficient and threshold value of each neuron of the neural network using a large number of teacher data given in advance.

  The suitability determination model 52b according to the present embodiment receives the sales information and outputs the sales suitability of the sale item according to the sales information. For example, the sales information shown in FIG. 3 includes information on the name of a product to be sold, an image of a product to be sold, a description, and a selling price, and the suitability determination model 52b receives these information items included in the sales information. However, with respect to the image of the product for sale, an appropriate filtering process is performed in advance to extract the feature amount indicating the feature of the image, and the extracted feature amount is input to the suitability determination model 52b. This can adopt a so-called CNN (Convolution Neural Network) learning model configuration including a convolutional layer and a pooling layer.

  The sales suitability output by the suitability determination model 52b according to the second embodiment is, for example, information indicating whether selling is possible or not. However, the suitability determination model 52b may output the sales suitability as a ratio of 0% to 100%, or may output the sales suitability as some other numerical information.

  The aptitude determination model 52b is deep-learned in advance by the second server device 5 or another server device. In the deep learning of the suitability determination model 52b, teacher data in which sales information including a sales product name, a sales product image, a description, a sales price, and the like created in advance and the suitability of the sales product according to this sales information are associated with each other. Is performed using. Since the deep learning processing is an existing technique, detailed description of the processing procedure is omitted. The second server device 5 stores an aptitude determination model 52b that has undergone deep learning in the storage unit 52. The teacher data can be, for example, data in which sales information regarding a legitimate article is associated with the aptitude for sale, and sales information regarding a counterfeit article is associated with an aptitude for sale. This allows the suitability determination model 52b to determine that the counterfeit article cannot be sold. Further, for example, learning may be performed to determine that an illegal article such as a drug or a handgun is unsellable, and learning to determine an article that infringes an intellectual property right is unsaleable.

  Returning to FIG. 18, the communication unit 53 of the second server device 5 is configured to include a circuit that performs processing related to communication, and the like, and via the network NW such as the Internet, a wireless LAN, and a mobile phone communication network. Communication is performed between the node device 2 of the block chain system 1 and devices such as the smartphone 6 owned by the user. The communication unit 53 transmits the data for transmission given from the processing unit 51 to another device. The communication unit 53 also receives data transmitted from another device and gives the received data to the processing unit 51.

  Further, in the processing unit 51, by executing the server program 52a stored in the storage unit 52, the suitability determination processing unit 51a, the user evaluation processing unit 51b, and the like are realized as software functional blocks. The aptitude determination processing unit 51 a uses the aptitude determination model 52 b stored in the storage unit 52 to perform a process of determining the aptitude of the sale item based on the sales information received from the smartphone 6 of the seller. The suitability determination processing unit 51a extracts the feature amount from the sale item image included in the received sale information, and inputs the sale item name, the feature amount of the sale item image, the description, and the selling price to the suitability determination model 52b. The suitability determination processing unit 51a acquires the sales suitability information output by the suitability determination processing unit 51a, and transmits the sales information to the blockchain system 1 when the sale item related to the sales information can be sold. On the other hand, when the sale item cannot be sold, the aptitude determination processing unit 51a discards the sale information without transmitting it to the block chain system 1.

  The user evaluation processing unit 51b performs a process of generating evaluation information for the user of the seller based on the determination result of the suitability determination processing unit 51a and transmitting the evaluation information to the block chain system 1. In the second embodiment, the evaluation information allows evaluation values to be evaluated in five levels from 1 to 5. The user evaluation processing unit 51b sets the evaluation value of the seller's user to 5 when the determination result indicating that the sale is possible is obtained as the suitability of the sale item, and sets the evaluation value when the determination result that the sale is impossible is obtained. It can be 1. However, the method of determining the evaluation value is not limited to this. For example, when the aptitude determination model 52b is configured to output the aptitude determination result at a rate of 0% to 100%, the evaluation value 1 is given to the determination result 0% to 20%, and the determination result is changed to 21% to 40%. On the other hand, the evaluation value 2 is given, the evaluation value 3 is given to the judgment results 41% to 60%, the evaluation value 4 is given to the judgment results 61% to 80%, and the judgment results 81% to 100% are given. The evaluation value 5 can be provided.

  In the trading system according to the second embodiment, the user can use the smartphone 6 to evaluate the trading partner user. For example, the smartphone 6 accepts the purchase confirmation operation by the purchaser and transmits the receipt confirmation information, receives the operation for requesting the return of the sale and transmits the return request information, or refunds the price after the return. After that, the evaluation screen for accepting the evaluation of the seller is displayed on the display unit 65, and the evaluation of the seller is accepted based on the user operation on the operation unit 66. The smartphone 6 generates evaluation information based on the received evaluation and transmits the generated evaluation information to the block chain system 1.

  Further, for example, the smartphone 6 displays an evaluation screen for accepting the evaluation of the purchaser after the price of the sale item has been remitted, or after the seller returns the return confirmation information by accepting the return confirmation operation. The purchaser's evaluation is displayed based on the user operation on the operation unit 66. The smartphone 6 generates evaluation information based on the received evaluation and transmits the generated evaluation information to the block chain system 1.

  Using the evaluation information stored in the block chain 3 of the block chain system 1, various functions can be realized in the trading processing system according to the second embodiment. For example, when displaying a list of items that can be purchased, or when receiving a selection of items to be purchased, the smartphone 6 of the purchaser displays the average value of the evaluation values of the sellers who sell the items. It can be calculated and displayed along with information about the sale. For example, the smartphone 6 traces each block of the block chain 3 in order and collects the evaluation information in which the user ID of the user to be evaluated is set as the evaluation target person ID. The smartphone 6 can acquire the evaluation values included in the collected evaluation information and calculate the average value of the acquired evaluation values. The smartphone 6 displays the evaluation value of the user of the seller in a list display or detailed display of the items to be sold, and at this time, the average value calculated from the evaluation information of the block chain 3 is used as the evaluation value of the user.

  In the present embodiment, there are two types of evaluation information, that is, evaluation information that another user has evaluated, and evaluation information that the second server device 5 has evaluated the user. When calculating the average value of the user's evaluation values, the smartphone 6 may simply average the evaluation values included in the two types of evaluation information, or may perform appropriate weighting on the two types of evaluation information, for example. Alternatively, the average value may be calculated. Further, for example, the smartphone 6 may individually calculate an average value for each of the two types of evaluation information and display the two evaluations separately.

  The display of the user's evaluation based on the evaluation information may be performed by a method other than the display of the average value of the evaluation values. For example, the smartphone 6 may display the total number of bad evaluations (for example, an evaluation value of 1) made to the user or the total number of good evaluations (for example, an evaluation value of 5). Further, for example, the smartphone 6 may display the evaluated number or ratio for each stage of the five-stage evaluation by a numerical value, and may further display using a bar graph, a pie graph or the like.

  Further, the transaction processing system may be configured such that the seller can restrict the purchase based on the evaluation value of the purchaser. For example, the smartphone 6 accepts the setting of restrictions on the evaluation of the purchaser when accepting the input of the sales information on the sale item from the seller. The seller can make settings on the smartphone 6, for example, permitting purchase only to users whose average evaluation value is 3 or more. The smartphone 6 of the seller transmits the sales information including the restriction condition regarding the evaluation to the block chain system 1. The purchaser's smartphone 6 does not transmit the payment information, for example, for the sale item whose evaluation value for the owner's user does not satisfy the restriction condition.

  Further, for example, when the transaction processing system has a configuration capable of accepting payment information from a plurality of purchasers for one sale item, the seller refers to each purchaser's evaluation to determine which purchaser It is possible to choose whether to sell the product for sale.

  FIG. 20 is a flowchart showing the procedure of aptitude determination processing performed by the second server device 5 according to the second embodiment. The suitability determination processing unit 51a of the processing unit 51 of the second server device 5 according to the second embodiment receives the sales information transmitted from the smartphone 6 of the seller at the communication unit 53 (step S71). The suitability determination processing unit 51a extracts the feature amount of the image by performing the filtering process or the like on the sale item image included in the sale information (step S72). The suitability determination processing unit 51a reads the suitability determination model 52b stored in the storage unit 52 (step S73).

  The suitability determination processing unit 51a inputs each information included in the sales information received in step S71 (however, for the sale item image, the feature amount extracted in step S72 is used) to the suitability determination model 52b (step S74), the result of the aptitude determination output by the aptitude determination model 52b is acquired (step S75). Based on the acquired suitability determination result, the suitability determination processing unit 51a determines whether or not the sale item related to the sales information can be sold (step S76). When it is determined that the sale item can be sold (S76: YES), the aptitude determination processing unit 51a transmits the sales information received in step S71 to the block chain system 1 by the communication unit 53 (step S77). The process proceeds to step S78. When it is determined that the sale item cannot be sold (S76: NO), the aptitude determination processing unit 51a advances the process to step S78.

  Next, the user evaluation processing unit 51b of the processing unit 51 calculates the evaluation value of the seller of the sale item based on the result of the suitability determination (step S78). The user evaluation processing unit 51b generates evaluation information including the calculated evaluation value and information such as the sale item ID and the user ID of the seller (step S79). The user evaluation processing unit 51b transmits the generated evaluation information to the block chain system 1 via the communication unit 53 (step S80), and ends the process.

  FIG. 21 is a flowchart showing the procedure of the evaluation acceptance process performed by the smartphone 6 according to the second embodiment. The processing unit 61 of the smartphone 6 according to the second embodiment displays, on the display unit, an evaluation screen that receives an evaluation from the seller or the purchaser when an evaluation item is selected from the menu screen displayed on the display unit 65, for example. It displays on 65 (step S91). The processing unit 61 receives the evaluation of the seller or the purchaser based on the user operation on the operation unit 66 (step S92). The processing unit 61 generates evaluation information based on the received evaluation (step S93), transmits the generated evaluation information to the block chain system 1 by the communication unit 63 (step S94), and ends the process.

  FIG. 22 is a flowchart showing the procedure of the evaluation display process performed by the smartphone 6 according to the second embodiment. In this example, the purchaser's smartphone 6 displays a list of items for sale, and the purchaser performs an operation of selecting one of the items for sale, thereby providing detailed information about the selected item for sale. 6 is displayed on the display unit 65, and the seller's evaluation is displayed on this detailed information. The processing unit 61 of the smartphone 6 according to the second embodiment determines whether or not a detailed display operation of the sale item is performed based on a user operation on the operation unit 66 while the sale item list is displayed. Yes (step S101). When the detailed display operation is not performed (S101: NO), the processing unit 61 waits until the detailed display operation is performed.

  When the operation of the detailed display is performed (S101: YES), the processing unit 61 communicates with the node device 2 of the block chain system 1 and performs the detailed display from the information stored in the block chain 3. A process of collecting evaluation information about the seller of the product is performed (step S102). Next, the processing unit 61 acquires the evaluation value of the seller included in each collected evaluation information (step S103). The processing unit 61 calculates the average value of the acquired one or more evaluation values (step S104). The processing unit 61 displays the detailed information of the sale item including the calculated average value as the evaluation of the seller on the display unit 65 (step S105), and ends the process.

  In the transaction processing system according to the second embodiment having the above configuration, the second server device 5 uses the aptitude determination model 52b to determine the sales aptitude of the sale item related to the sales information. The suitability determination model 52b is a deep learning model in which the sales information generated by the smartphone 6 of the seller is input and the sales suitability of the sale item related to the sales information is output. The aptitude determination model 52b uses a teacher data in which information such as a name of a sale item, an explanation about the sale item, an image (feature amount) of the sale item, and a selling price is associated with the sale aptitude of the sale item, for example. It is a learned model that has been learned. The transaction processing system determines the sale aptitude of the sale item by using the aptitude determination model 52b, and determines whether or not the sale item can be sold based on the determination result, thereby preventing illegal sale and sale of the sale item. .

  Further, in the transaction processing system, the sales suitability information including the sales suitability determination result of the sale product by the suitability determination model 52b and the user ID of the seller of the sale product is stored in the block chain 3. As a result, the purchaser can check the sales suitability determination result of the sale product by the suitability determination model 52b using the smartphone 6.

  In the trading system, the second server device 5 calculates the seller's evaluation value based on the result of the sales suitability judgment by the suitability judgment model 52b, and includes the calculated evaluation value and the seller's user ID. The evaluation information is transmitted to the block chain system 1. Thereby, the purchaser who is going to purchase the sale item can refer to the evaluation of the seller who sells the sale item, and can use it as a decision material for the purchase.

  In the transaction processing system, the smartphone 6 receives the evaluation of the purchaser by the seller and the seller of the seller by the purchaser, and transmits the evaluation information including the received evaluation to the block chain system 1. As a result, it is possible to store the evaluation information by both the seller and the purchaser related to the sale and sale of the sale item in the block chain 3, and use these evaluations as a judgment material in the subsequent sale and purchase.

  In the trading system according to the second embodiment, the second server device 5 transmits the sales information received from the seller to the block chain system 1, but the present invention is not limited to this. For example, the sales information may be directly transmitted from the seller's smartphone 6 to the block chain system 1, and the sales aptitude information by the second server device 5 may be transmitted to the block chain system 1. Even with this configuration, the purchaser can determine the sales suitability of the sales information by confirming the sales suitability information stored in the block chain 3 using the smartphone 6.

(Modification)
FIG. 23 is a schematic diagram for explaining the configuration of the trading processing system according to the modification of the second embodiment. In the transaction processing system according to the modified example, the server device 4 collects the evaluation information on other auction sites, flea market sites, etc. for users of sellers and purchasers who use this system. For example, when the user registers user information at the start of use of the trading system, the server device 4 inputs information about the use of other auction sites or flea market sites, such as user IDs at other sites. It is received and stored in the user information DB 42b. The server device 4 accesses another site based on the input information and collects information regarding user evaluation. After that, the server device 4 generates evaluation information including the collected evaluation and the user ID of the user, and transmits the generated evaluation information to the block chain system 1. As a result, the blockchain 3 of the blockchain system 1 stores information about user evaluations at other sites. The seller and the user of the purchaser who use the sale / purchase processing system can confirm evaluations of other users on other sites by using the smartphone 6.

  In the trading system according to the modification, when the user of the seller or the buyer uses the trading system such as another flea market site or an auction site, the evaluation of the user in the other trading system is performed by the server device. 4 transmits the evaluation information including the acquired evaluation to the blockchain system 1, thereby providing the information regarding the evaluation at another site to the user who uses the trading system. As a result, for example, it is possible to provide an evaluation of a user who has newly entered, based on an evaluation by another trading system.

  In this modification, the server device 4 is configured to acquire the evaluation of the user at another site, but the present invention is not limited to this. The configuration may be such that the user's evaluation at another site is acquired by, for example, the second server device 5, the smartphone 6, or a device other than these.

  The other configurations of the trading system according to the second embodiment are the same as those of the trading system according to the first embodiment, and therefore, the same portions are denoted by the same reference numerals and detailed description thereof will be omitted.

<Third Embodiment>
FIG. 24 is a schematic diagram for explaining a trading method by the trading processing system according to the third embodiment. In the transaction processing system according to the third embodiment, the selling price of a product for sale decreases with the passage of time. The seller can set, for example, the starting price, the minimum price, the price fluctuation rate, and the like for the selling price of the product for sale. The seller sends sales information in which these pieces of information are set to his own smartphone 6 to the block chain system 1. After the sales information is stored in the block chain 3 of the block chain system 1, the selling price of the sale item decreases from the start price to the lowest price with the passage of time according to the setting of the seller.

  The purchaser who wants to purchase the sale item can set the payment price lower than the current sale price and transmit the payment information from the smartphone 6 to the block chain system 1. However, in this case, the sale is not established when the payment information is transmitted, and the sale is established when the selling price of the sale item is reduced to the payment price or less. Therefore, a plurality of purchasers can set different payment prices and transmit the payment information, and the purchaser who sets the highest payment price has the right to purchase the product for sale. The purchaser who has obtained the right to purchase may send a notification request from the smartphone 6 to the server device 4 and wait for receipt of the sale item.

  Further, in the transaction processing system according to the third embodiment, a plurality of purchasers may set the same payment price and transmit payment information. When there are a plurality of purchasers who set the payment price to the same amount, one purchaser who sends the payment information to the blockchain system 1 earliest can obtain the right to purchase the sale item. Therefore, when the node device 2 according to the third embodiment receives the payment information from the smartphone 6, the node device 2 adds the time stamp information indicating the date and time of the reception to the payment information and stores it in the data block of the block chain 3. To do.

  FIG. 25 is a schematic diagram showing a configuration example of the block chain 3 according to the third embodiment. The sales information stored in the block chain 3 according to the third embodiment includes information such as a start price, a price fluctuation rate, and a minimum price. The starting price is a price at the time when the product for sale is sold, and is the highest price of the selling price. The price fluctuation rate is a price that decreases per unit time, and in the illustrated example, the price decreases by 10 per hour. The lowest price is the lowest price that allows a decrease in the selling price, and when the selling price reaches the lowest price, no further price reduction occurs.

  Further, in the third embodiment, the sales information includes a price change program. This price fluctuation program is a program executed on the virtual machine of the block chain system 1, and is a so-called smart contract program. The price change program performs a process of reducing the selling price of the sale item according to the start price, the price change rate, and the minimum price set in the sales information. Further, the price change program searches the blockchain 3 for the payment information transmitted by the purchaser who wishes to purchase the sale item, and when the payment price included in the payment information is equal to or higher than the sale price of the sale item, the payment information is obtained. The process of giving the right to purchase the product for sale to the buyer who sent

  Further, in the third embodiment, the payment information is provided with a time stamp. Although illustration is omitted, the sales information may be time stamped. The time stamp is information indicating the date and time when the payment information is received, and is created by the node device 2 that receives the payment information and attached to the payment information. If the same payment price is set for multiple payment information for the same product, the purchaser who is entitled to purchase the product is determined based on the time stamp attached to the payment information. To be done. The time stamp may be added to the payment information by the smartphone 6.

  FIG. 26 is a flowchart showing a procedure of price fluctuation processing performed by the node device 2 of the block chain system 1 according to the third embodiment, in which the price fluctuation program included in the sales information is executed on the virtual machine of the node device 2. This is the process performed by The processing unit 21 of the node device 2 according to the third embodiment searches for payment information stored in the block chain 3 (step S111), thereby allowing a purchaser who wants to purchase the sale item related to the sale information to receive the purchase information. Get payment information. The processing unit 21 compares the payment price set in the payment information with the current selling price of the product to be sold, and determines whether the payment price is equal to or higher than the selling price (step S112).

  When the payment price is less than the sales price (S112: NO), the processing unit 21 determines whether or not a predetermined time has passed since the sales information was stored in the block chain 3 or since the previous price decrease (step). 113). When the predetermined time has not elapsed (S103: NO), the processing unit 21 returns the process to step S111. When the predetermined time has elapsed (S113: YES), the selling price of the sale item is decreased according to the price fluctuation rate set in the selling information (step S114). The processing unit 21 determines whether or not the sale price of the sale item has reached the lowest price set in the sale information (step S115). When the selling price has not reached the minimum price (S115: NO), the processing unit 21 returns the process to step S111. When the selling price has reached the lowest price (S115: YES), the processing unit 21 stops the fluctuation of the selling price of the sale item (step S116) and ends the process. After that, the sale is continued with the minimum sale price set.

  When it is determined that the payment price is equal to or higher than the selling price (S112: YES), the processing unit 21 notifies whether the sale related to the sale item is right or wrong (step S117), and ends the process. At this time, the processing unit 21 gives the right of purchase to one purchaser who has set the payment price equal to or higher than the selling price, and grants the purchase right to the other purchasers. And do not grant the right to purchase. In addition, when there are a plurality of payment information in which the payment price of the same amount is set, the processing unit 21 gives the earliest payment information to the purchaser that has transmitted the payment information to the blockchain system 1 based on the time stamp attached to the payment information. The purchase right is granted by notifying that the sale is successful.

  The trading system according to the third embodiment having the above-described configuration reduces the selling price of the article for sale as time passes. The purchaser who wants to purchase the sale item sets the payment price for the sale item in the payment information stored in the block chain 3. When the selling price decreases and the payment price set by the purchaser becomes equal to or higher than the selling price, the purchaser who sets the payment price is granted the right to purchase the sale item. As a result, it is possible to establish the sale and sale of the sale item in a state where the selling price that the seller wants to sell and the payment price that the buyer wants to buy are balanced.

  In addition, when a plurality of purchasers have set the same payment price in the payment information, the transaction processing system determines when the node device 2 receives the payment information transmitted from the smartphone 6 of the purchasers to the block chain system 1. According to the above, one purchaser is selected, and the purchase right of the sale item is given to the selected one purchaser. That is, the purchase and sale processing system grants the purchase right to the purchaser who received the payment information earliest. As a result, it can be expected that the sale of the product for sale will be completed early.

  However, in the transaction processing system, when there are multiple purchasers with the same payment price, the seller selects the purchaser instead of selecting one purchaser according to the payment information reception timing. It may be configured to be possible. The seller can select any one of the plurality of purchasers by referring to the evaluation information described in the second embodiment, for example. In this case, the seller's smartphone 6 displays information regarding a plurality of purchasers and performs processing for accepting the purchaser's selection by the seller.

  The other configurations of the trading system according to the third embodiment are the same as those of the trading system according to the first embodiment, and thus the same portions are denoted by the same reference numerals and detailed description thereof will be omitted.

  The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above meaning but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

1 blockchain system 2 node equipment (trade processing equipment)
3 block chain 4 server device 5 second server device 6 smartphone 21 processing unit 21a shared processing unit 21b sales information processing unit 21c payment information processing unit 21d payment processing unit (remittance processing unit)
22 storage unit 22a program (computer program)
23 communication unit 41 processing unit 41a user information management processing unit 41b user information notification processing unit 42 storage unit 42a server program 42b user information DB
51 processing unit 51a aptitude determination processing unit 51b user evaluation processing unit 52 storage unit 52a server program 52b aptitude determination model 53 communication unit 61 processing unit 61a sales information processing unit 61b display processing unit 61c payment information processing unit 61d receipt confirmation information processing unit 61e Returned goods information processing section 61f Returned goods confirmation information processing section 62 Storage section 62a App (computer program)
62b key information 63 communication unit 64 camera 65 display unit 66 operation unit 97, 98, 99 recording medium

Claims (18)

Receive sales information related to a product for sale from the seller, store the sales information in a block chain data block,
From a purchaser who wishes to purchase the sale item, it is determined whether or not the sale item is received, payment information including a smart contract for paying the price of the sale item in virtual currency is accepted, and the payment information is stored in the data block. Stored in
A trading method comprising: transmitting a virtual currency related to the payment information to the seller when a receipt confirmation of the sale item is received from the purchaser. The sales information includes information on the selling price of the sale item,
The payment information includes information on a payment price for the sale,
The method of trading according to claim 1, wherein, when the payment information is received, it is determined whether the payment price satisfies the selling price. The method of trading according to claim 1 or 2, wherein, when a return request of the sale item is received from the purchaser, the virtual currency related to the payment information is remitted to the purchaser. The virtual currency related to the payment information is refunded to the purchaser when a return request of the sale item is received from the purchaser and a return confirmation of the sale item is received from the seller. The trading method according to claim 3. The sales suitability of the sales product related to the sales information received from the seller is determined using a learning model that inputs the sales information and outputs the sales suitability of the sales product related to the sales information. The trading method according to any one of claims 1 to 4. The sales information includes a description of the sale item, an image of the sale item, and information on a sale price of the sale item,
The learning model is learned using teacher data that associates the description of the sale item, the image of the sale item, and the sale price information of the sale item with the sales aptitude of the sale item. The trading method according to claim 5. 7. The selling / buying method according to claim 5 or 6, wherein the sale availability of the sale item related to the sale information received from the seller is determined based on the result of the sale suitability determination. 8. The trading method according to any one of claims 5 to 7, wherein sales suitability information including a sales suitability determination result and identification information of the seller is stored in the data block. Calculate the evaluation value of the seller based on the determination result of the sales aptitude,
The trading method according to any one of claims 5 to 8, wherein evaluation information including the evaluation value and the identification information of the seller is stored in the data block. Accept the buyer's evaluation by the seller,
Accept the seller's evaluation by the buyer,
The evaluation information including the received evaluation is stored in the data block, The trading method according to claim 5. Obtaining evaluation information about the seller or other purchases and sales for the buyer,
The trading method according to any one of claims 5 to 10, wherein the acquired evaluation information is provided to the purchaser or the seller. The sales information includes information on the selling price of the sale item,
The payment information includes information on a payment price for the sale,
Decrease the selling price over time,
12. The trading method according to claim 1, wherein when the payment price is equal to or higher than a selling price, the purchaser is given a right to purchase the sale item. When accepting payment information including the same price payment information from multiple purchasers, select one purchaser according to the payment information acceptance time,
13. The trading method according to claim 12, wherein the selected one purchaser is given the right to purchase the sale item. A sales information processing unit that receives sales information about a product for sale from a seller and stores the sales information in a data block of a block chain,
From a purchaser who wishes to purchase the sale item, it is determined whether or not the sale item is received, payment information including a smart contract for paying the price of the sale item in virtual currency is accepted, and the payment information is stored in the data block. A payment information processing unit that performs processing of storing in
And a remittance processing unit that performs a process of remitting the virtual currency related to the payment information to the seller when a confirmation of receipt of the sale item is received from the purchaser. Equipped with multiple trading devices that share a blockchain,
The transaction processing device is
A sales information processing unit that receives sales information about a product for sale from a seller and stores the sales information in a data block of a block chain,
From a purchaser who wishes to purchase the sale item, it is determined whether or not the sale item is received, payment information including a smart contract for paying the price of the sale item in virtual currency is accepted, and the payment information is stored in the data block. A payment information processing unit that performs processing of storing in
And a remittance processing unit that remits the virtual currency related to the payment information to the seller when a confirmation of receipt of the sale item is received from the purchaser. On the computer,
Receive sales information related to a product for sale from the seller, store the sales information in a block chain data block,
From a purchaser who wishes to purchase the sale item, it is determined whether or not the sale item is received, payment information including a smart contract for paying the price of the sale item in virtual currency is accepted, and the payment information is stored in the data block. Stored in
A computer program that, when receiving confirmation of receipt of the sale item from the purchaser, executes a process of transmitting virtual currency related to the payment information to the seller. On the computer,
Accepts purchase operations for sales items related to sales information stored in the block chain data block,
According to the accepted purchase operation, it is determined whether or not the sale item is received, and payment information including a smart contract for paying the price of the sale item in virtual currency is generated,
A computer program characterized by causing a process of transmitting the generated payment information to a block chain. On the computer,
Accept the input of information related to the sale,
Based on the received information, generate sales information related to the sale,
The computer program according to claim 17, further comprising: a process of transmitting the generated sales information to the block chain.

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