JP6404435B1 - Item transaction system and item transaction program - Google Patents

Abstract

The present invention activates item transactions via a network. A price of an item is determined between a first user and a second user who owns an item to be electronically traded, and compensation for the price is paid from the second user to the first user. The ownership of the item is transferred from the first user to the second user, the history of the change of ownership is stored as a block chain, and depending on the number of users who own the same kind of item as the network or Change the effects of items in the real world. [Selection] Figure 7

Description

  The present invention relates to an item transaction system and an item transaction program.

  In an online game using a client terminal such as a smartphone or a mobile phone, a function for electronically exchanging items used in the game between users is implemented. For example, an exhibition request for listing a first game item is received from a first user among a plurality of users, and an exchange between an item owned by the second user and an item exhibited by the first user is requested from a second user. A system that realizes real money trade by receiving an exchange request and indicating that these items are listed for exchange to some or all of a plurality of users is disclosed (Patent Document 1). ).

JP, 2015-112140, A

  By the way, in the conventional item exchange method, the motivation for activating the transaction of the item between users was not enough. Therefore, items are not frequently exchanged between users.

  One aspect of the present invention is a price determination means for determining a price of an item between a first user who owns an item to be electronically traded and a second user different from the first user. And by paying the first user from the second user a price for the price determined by the price determination means, the ownership of the item is transferred from the first user to the second user. An item transaction system comprising: item delegation means; and database creation means for storing a history of changes in ownership in the item delegation means as a transaction history database, wherein the item transaction system transacts the item via a network. Refer to the number of users who own items of the same type as the item stored as the history database, and respond to the number of users. Providing the value changing means for changing the effect of the item on or real world on a network Te is an item trading system characterized.

  In another aspect of the invention, the computer determines a price of the item between a first user who owns the item to be electronically traded and a second user that is different from the first user. The item ownership of the item is transferred from the first user to the second user by paying the first user with a price determination unit and a price for the price determined by the price determination unit. Item delegation means for delegation, database creation means for storing a history of changes in ownership in the item delegation means as a transaction history database, and a user who owns an item of the same type as the item stored as the transaction history database Referring to the number, change the effect of the item on the network or in the real world according to the number of users An item trading program for causing to function as an item trading system comprising a value changing means.

  Here, it is preferable that the value changing means is changed so as to enhance the effect of the item as the number of users increases.

Further, by referring to the number of transactions the item, it is preferable to change the number of issued the item to be traded in accordance with the number of transactions. For example, it is preferable to increase the number of items issued as the number of transactions increases.

Further, it is preferable to correct the number of transactions according to the past transaction status of a user involved in the item transaction . For example, it is preferable to perform correction so that the number of transactions increases as the number of past transactions of the user involved in the item transaction increases.

  Further, it is preferable that the item delegation means is charged for the payment of the consideration.

  The item is preferably used for playing an electronic game.

  ADVANTAGE OF THE INVENTION According to this invention, the transaction of the item via a network can be activated.

It is a figure which shows the structure of the item transaction system in embodiment of this invention. It is a figure which shows the structure of the server in embodiment of this invention. It is a figure which shows the structure of the client in embodiment of this invention. It is a figure which shows the example of the item database in embodiment of this invention. It is a figure which shows the structure of the block chain in embodiment of this invention. It is a flowchart which shows the item transaction method in embodiment of this invention. It is a flowchart which shows the change process of the effect of the item in embodiment of this invention. It is a flowchart which shows the change process of the upper limit of the issuance number of the item in embodiment of this invention.

  As shown in FIG. 1, the item transaction system 100 according to the embodiment of the present invention includes a configuration in which a server 102 and a plurality of clients 104 (104a, 104b...) Are connected via a network 106.

  As illustrated in FIG. 2, the server 102 includes a processing unit 10, a storage unit 12, an input unit 14, and an output unit 16. That is, the server 102 has a basic configuration of a computer and can be a general PC or the like. The server 102 functions as a full node server that holds all the data of the block chain that manages item transactions (transactions), which will be described later.

  The processing unit 10 includes means for performing arithmetic processing such as a CPU. The processing unit 10 executes the item transaction server program stored in the storage unit 12 to realize processing related to item transactions in the present embodiment. The storage unit 12 includes storage means such as a semiconductor memory and a hard disk. The storage unit 12 is connected to the processing unit 10 so as to be accessible, and stores an item transaction server program, data used for processing, and the like. The input unit 14 includes means for inputting information to the server 102. The input unit 14 includes, for example, a touch panel and a keyboard that receive input from the user. The input unit 14 includes a network interface that receives information from the outside of the server 102 and receives data to be processed. The output unit 16 includes means for outputting information processed by the server 102. The output unit 16 includes, for example, a display that presents an image to the administrator. The output unit 16 includes a network interface that transmits information to the outside of the server 102 and transmits information to the external client 104.

  As shown in FIG. 3, the client 104 includes a processing unit 20, a storage unit 22, an input unit 24, and an output unit 26. That is, the client 104 has a basic computer configuration and can be a general PC, tablet terminal, mobile phone, or the like. The client 104 functions as an SPV client that partially receives blockchain data from the server 102 and performs processing.

  The processing unit 20 includes means for performing arithmetic processing such as a CPU. The processing unit 20 executes the item transaction client program stored in the storage unit 22 to realize processing relating to item transactions in the present embodiment. The storage unit 22 includes storage means such as a semiconductor memory and a hard disk. The storage unit 22 is connected to the processing unit 20 so as to be accessible, and stores an item transaction client program, data used for processing, and the like. The input unit 24 includes means for inputting information to the client 104. The input unit 24 includes, for example, a touch panel and a keyboard that receive input from the user. The input unit 24 includes a network interface that receives information from the outside of the client 104 and receives data to be processed. The output unit 26 includes means for outputting information processed by the client 104. The output unit 26 includes, for example, a display that presents an image to the administrator. The output unit 26 includes a network interface that transmits information to the outside of the client 104 and transmits information to other clients 104 and the server 102.

  The item transaction system 100 performs processing for managing item transactions on a network space among a plurality of clients 104 via a network 106. The item transaction system 100 stores and manages the transaction history of items between different users as a transaction history database using, for example, a block chain method. The transaction history database is shared (stored in each storage means) between the server 102 and the plurality of clients 104 included in the item transaction system 100.

[Item transaction processing]
Hereinafter, the process at the time of trading an item between users is demonstrated. Here, an example will be described where user A uses client 104a and user B uses client 104b to delegate items from user A to user B.

  In principle, the item transaction is a relative transaction between the user A and the user B. That is, the price of the item to be traded is determined between the user A and the user B, and the consideration corresponding to the price of the item is paid from the user B to the user A, whereby the ownership of the item is transferred from the user A to the user. Delegated to B.

  Here, as reference information when setting the price of an item, the number of issued items, the upper limit of the number of issued items, the number of transactions, the effect of the item (the effect of using the item in an electronic game, when the item is used in the real world Effect) will be released. The reference information is managed by the server 102 as an item database, and can be confirmed by the user by accessing the server 102 from each client 104.

  In the present embodiment, it is assumed that an item to be traded exhibits an effect (value) on the network or the real world. Here, the effect (value) on the network means an effect in an electronic virtual space. For example, it is possible to play an electronic game (for example, a token for playing), or in an electronic game. It means that the play can be advantageously advanced (for example, an item on the game). The effect (value) in the real world means that, for example, it is possible to exchange items and money or goods. However, the effect (value) brought about by the item is not limited to these.

  FIG. 4 shows an example of registration of the item database. As shown in FIG. 4, in the item database, the number of issues for each item, the upper limit of the number of issues, the number of owners, the number of transactions, the effect of the item (the effect when the item is used in an electronic game, the item is used in the real world) (Effects of doing so) is registered. For example, for item a, the number of issues is 60, the maximum number of issues is 100, the number of owners is 25, the number of transactions is 520 times, the item's game effect is 10 attack power, the item's real-world effect Can be exchanged for goods x with a probability of 1%. Thus, information for determining the value for each item is registered, and the price of the item can be set between users by referring to the information.

  Here, the block chain system will be described. The block functions as a transaction database containing information regarding item transactions between users. Specifically, each block includes a list of transactions that are information about digest data and transactions. The digest data includes a new hash value calculated from the previous block. That is, as shown in FIG. 5, when a block includes a hash value calculated from information included in the previous block, each block is stored as a transaction database (block chain) in a chained state. Is done. The transaction history database is not managed only by the server 102 but is verified and added by a plurality of clients 104.

  Transactions are data that record item transactions between users. The transaction includes input information indicating information related to the transfer source (user A) and output information indicating information related to the transfer destination (user B). The input information includes the output information of the transaction (identification information (transaction hash value, array number, etc.) for identifying the transaction) when the user A who is the delegation receives the delegation of the item to be traded, and the user A It includes information for proving possession of the item (such as a script that satisfies the conditions for using the output). The output information includes information such as the type and number of delegated items, a script for using the delegated items at the address specifying the delegation destination user B, and the like.

  Hereinafter, with reference to FIG. 6, the process which trades an item is demonstrated. Here, an example of a transaction in which the item a is transferred from the user A to the user B will be described. The following is an example of item transaction, and the method of transaction is not limited to this.

  In step S10, the fact that user A owns item a is disclosed via network 106. For example, the user A transmits information indicating that the item a is owned to other users (including the user B) using a social networking system (SNS), a chat system, or the like in the client 104a.

  In step S <b> 12, a request is sent from user B to user A to receive item a delegation. By the processing in this step, the item transaction system 100 functions as a part of the price determination unit. User B informs user A that he wants to receive the delegation of item a. That is, the client 104b transmits information regarding the delegation to the item a to the client 104a, the number of items to be delegated, and information regarding the delegation price.

  At this time, the user B can obtain information on an item to be traded from the server 102. That is, by accessing the server 102 from the client 104b, information related to the item a included in the registration information of the item database is read and displayed on the client 104b. User B can set the delegation price of item a with reference to the displayed information. Note that the information presented to the user B does not have to be all information included in the item database, and may be only a part thereof. For example, only the effect of the item relating to the item a (the effect when the item is used in an electronic game, the effect when the item is used in the real world) may be transmitted from the server 102 to the client 104b.

  In step S14, the user A replies whether or not to receive a delegation request from the user B. By the processing in this step, the item transaction system 100 functions as a part of the price determination unit. The client 104a receives information related to the delegation request from the client 104b and displays these information. User A confirms this information, and if conditions such as the number of items and transfer price are accepted, informs user B of that fact. That is, information indicating that a delegation request is received from the client 104a to the client 104b is transmitted.

  If user A cannot accept the delegation request, the exchanges of steps S12 and S14 may be repeated.

  In the present embodiment, the user B serving as the delegation destination transmits the delegation request including the price to the user A serving as the delegation source. However, the present invention is not limited to this. For example, a delegation request including a price may be sent from the user A as the delegation source to the user B as the delegation destination, and the user B may reply whether or not to receive this request. Further, for example, the price may be determined by another method such as an auction method.

  In step S16, transmission and remittance of information relating to the address of the transfer destination is performed from user B to user A. When the client 104b receives the information to accept the delegation request from the client 104a, the client 104b displays the information and presents it to the user B. When the user B acquires the item “a” under the delegation request condition, the user B transmits information on the address of the user B as the delegation destination from the client 104b to the client 104a. The address includes information obtained by encrypting a public key paired with the secret key with a secret key that only the user B can know. The client 104b transmits the address to the client 104a.

  In addition, a payment process for consideration for the transfer price presented from the user B to the user A in the transfer request is performed. The payment of the consideration is not particularly limited, but may be performed using, for example, a virtual currency such as Bitcoin, Ethereum, or NEM. Since the existing method may be applied to the payment processing of the consideration, the description is omitted.

  In the payment of the consideration, a part or additional fee may be paid to the user (minor) who has performed the block chain generation process (mining process) described later. Further, in the payment of the consideration, a part or additional fee may be charged and paid to the system administrator who operates the system.

  In step S18, a transaction is created. By the processing in this step, the item transaction system 100 functions as part of the item delegation means. When the client 104a receives the address from the client 104b and confirms payment of the consideration, the client 104a generates a transaction that is data for recording the transaction of the item a from the user A to the user B. Specifically, the transaction output information (identification information (transaction hash value, array number, etc.) for identifying the transaction) when the user A who is the delegation has been delegated the item a to be traded, and the user Information for proving that A owns the item a (such as a script that satisfies the conditions for using the output) is generated as input information. At this time, the user A authenticates the output information of the transaction when the item a is delegated using the secret key used when the item a that is the transaction target is delegated. It can be verified that he is the owner of a. Further, the number of items a transferred from the user A to the user B, a script for using the items transferred at the address specifying the transfer destination user B, and the like are generated as output information. Then, a transaction including these input information and output information is generated.

  The generated transaction information is disclosed via the network 106. Note that the transaction may not be completely completed at the time when the transaction is generated. That is, as will be described later, a transaction may be established when a block chain generation process (mining process) including the transaction is completed.

  In step S <b> 20, information related to the transaction is transmitted to the server 102. The server 102 in this embodiment manages the number of owned users and the number of past transactions (number of transactions) for each item. Therefore, after generating a new transaction, the client 104a transmits to the server 102 information indicating that a new transaction has been generated with respect to the information of the user B who has become the owner of the item a and the item a. Further, when the number of items a owned by the user A becomes 0 by the transaction, information indicating that the user A is no longer the owner of the item a is transmitted to the server 102.

  In step S <b> 22, the server 102 performs an update process for the number of owned users of the item and the past number of transactions (number of transactions). When the server 102 receives from the client 104a information on the user B who has become the owner of the item a and information indicating that a new transaction has been generated for the item a, the server 102 owns the item a registered in the item database. Increase the number of people and the number of transactions by one. Further, when the server 102 receives information indicating that the user A is no longer the owner of the item a by the transaction, the server 102 decreases the number of owners of the item database by one.

[Blockchain generation processing (mining processing)]
As described above, a block is generated by collecting a plurality of transactions indicating information related to item transactions. By this processing, the item transaction system 100 functions as part of the item delegation unit and the database creation unit. A user who performs blockchain generation processing is called a minor.

  The miner verifies that the data of the transaction published in the network 106 within the predetermined time in the client 104 is correct, and generates a new block by collecting the verified transactions.

  The transaction verification process generates a hash value by performing a predetermined operation on unsigned transaction data included in the transaction, and decrypts the encrypted signature data included in the transaction data with a public key. Generated and whether these values match or not. A plurality of transactions verified in this way are collected, and a new block including a hash value calculated from information included in the previous block is generated.

  At this time, a correct block is generated by imposing an appropriate proof of work on the minor, and a correct block chain is constructed. The generated block and block chain are published on the network 106. The server 102 functions as a full node server that stores and manages all block chain and block information included therein.

  In addition, you may make it give rewards, such as giving an item newly, to the user (minor) who performed the production | generation process (mining process) of a block. That is, you may make it give the effect called excavation of an item in common.

  As described above, in the present embodiment, a transaction indicating the content of an item transaction between users is generated, and a block chain that is a transaction history database including information on the transaction is used, so that the item Trading can be realized.

[Effect change processing]
In this embodiment, referring to the number of users (number of owners) who own items of the same type as items stored as blockchains, the effect of the item on the network or in the real world is determined according to the number of owners. Processing to change is performed. By this processing, the item transaction system 100 functions as part of the value changing unit.

  When the number of owners stored for each item in the item database is updated, the server 102 changes the effect of the item according to the number of owners stored in association with each item. The item effect changing process will be described below with reference to the flowchart of FIG.

  In step S30, the number of owners of each item stored in the item database is read out. The processing unit 10 of the server 102 reads out each item and the number of owners from the item database stored in the storage unit 12.

  In step S32, the effect of the item is set for each item according to the number of owners. The processing unit 10 updates the effect of the item in the item database according to the number of owners of the item read in step S30.

  The effect of the item to be changed is not particularly limited, but can be the effect when the item is used in an electronic game. For example, the effect of the item a on the electronic game is to increase the attack power, but the effect of the item may be changed so as to increase or decrease the effect of the attack power increase. At this time, it is suitable to change so that the effect of an item may be heightened with the increase in the number of owners of an item. For example, the attack power may be increased as the effect of the item a on the electronic game as the number of owners of the item increases. Specifically, if the number of owners of an item is 1 or more and less than 50, the attack power is increased by 10; if the number of owners is 50 or more and less than 200, the attack power is increased by 20; Good. It should be noted that the effect of the item on the electronic game is not limited to an increase in attack power, but may be any effect that provides some effect in an electronic game such as an increase in defense power, an increase in recovery power, and special magic. Further, the effect of the item on the electronic game may be such that an item on the electronic game corresponding to the game stage is obtained with a predetermined probability as a result of the game play. The item may be an item that can be used in the game.

  Moreover, the effect of the item to be changed can be the effect when the item is used in the real world. For example, the effect of using item a in the real world is that it can be exchanged for goods x with a probability of 1%, so the probability of exchange can be increased or decreased, or the type of goods to be exchanged can be changed. do it. At this time, it is suitable to change so that the effect of an item may be heightened with the increase in the number of owners of an item. For example, as the number of item owners increases, the exchange probability of goods x may be increased as an effect when the item a is used in the real world. Specifically, if the number of item owners is 1 or more and less than 50, the exchange probability is 1%, and if the number of owners is 50 or more and less than 200, the exchange probability is increased to 5%. What should I do?

  In addition, the effect when the item is used in the real world is not limited to the effect with the goods, but may be any effect as long as it gives some effect in the real world, such as monetization or participation in an event. For example, you may make it give the effect that the game play of the game stage corresponding to the item which a user holds can be performed. In addition, for example, an item corresponding to the game stage can be obtained with a predetermined probability as a result of the game play, and the item can be a virtual currency such as bit coin, a coubon ticket used in another web service or a real-world store. Alternatively, it may be a voucher that can be exchanged for a thing used in the real world (food, daily necessities, etc.). Moreover, the probability that an item is obtained from the corresponding game stage may increase as the number of users (owners) holding the item increases.

  In this way, the item transaction can be activated by changing the effect of the item as the number of item owners changes. In other words, the effect of an item cannot be enhanced when one user holds many items, and the effect of an item can be enhanced by making as many users as possible owners of the item. It is possible to increase the motivation for performing a transaction for diffusing items among users.

  Therefore, it can be used for the promotion of events and products using items. For example, a campaign that gives an effect that a sample of a new product can be received with a certain probability as an effect (value) in the real world for a certain item, and increases the probability as the number of owners of that item increases. By doing so, it is possible to motivate the item to diffuse in order to increase the probability of getting a sample.

  At this time, by enabling the user to confirm the effect of the item stored in the item database in the client 104, the user can confirm the change in the value of the item and the like, and try to spread the item. The motivation can be further increased.

[Change the maximum number of items issued]
In the present embodiment, the upper limit of the number of items issued may be changed as the item transaction increases.

  When the number of transactions (number of transactions) stored for each item in the item database is updated, the server 102 changes the upper limit of the number of issues stored in association with each item. Hereinafter, the process for changing the upper limit of the number of items issued will be described with reference to the flowchart of FIG.

  In step S40, the transaction count of each item stored in the item database is read. The processing unit 10 of the server 102 reads out each item and the number of transactions from the item database stored in the storage unit 12.

  In step S42, the upper limit of the number of items issued is set for each item according to the number of transactions. The processing unit 10 updates the upper limit of the number of items issued in the item database according to the number of item transactions read in step S40. At this time, it is suitable to change so that the upper limit of the number of issue of an item may be increased with the increase in the number of item transactions. Specifically, when the number of item transactions is 1 or more and less than 1000, the upper limit of the number of item issuance is 100, and when the number of transactions is 1000 or more and less than 30000, the upper limit of the item issuance number is 1000. What should I do? Note that the method for setting the upper limit of the number of items to be issued is not limited to this.

  In this way, by changing the upper limit of the number of items issued according to the number of item transactions, it is possible to appropriately limit the number of items traded according to the actual state of item transactions. As a result, an unnecessarily large number of items are not subject to transaction, and the value of the item can be appropriately maintained in accordance with the actual situation of the transaction.

  The number of transactions (number of transactions) registered in the item database may be corrected according to the past transaction history of the user who has traded the item. That is, in step S22, the number of item transactions (number of transactions) is increased by 1 in response to the occurrence of a new transaction. However, the number of transactions increased according to the number of past transactions of the user involved in the transaction. The number may be corrected. At this time, it is preferable to perform correction so as to increase the number of item transactions in the item database as the number of past transactions of users involved in the transaction increases. The number of past transactions of each user may be stored and updated in the server 102 by transmitting the user involved in the transaction from the client 104 to the server 102 every time a new transaction occurs.

  Thus, by correcting the number of item transactions according to the number of past transactions of the user, it is possible to set the upper limit of the number of items issued by weighting the transactions of the user who has a large number of transactions. For example, users with a large number of transactions are likely to focus on important items in the market, so by increasing the number of items issued by such users, the number of items according to market demand Can be distributed.

  Note that an item having the same attribute may be handled as the same type of item by previously setting and storing an attribute or the like for each item. That is, when the number of owners stored for each item of the same type in the item database is updated, the effect of the item may be changed according to the number of owners stored in association with the item of the same type. Good. Further, the upper limit of the number of issues of the same type of item may be changed as the transaction of the same type of item increases.

  In addition, the item (token) in the present embodiment can be issued using a unique currency issuing function (mosaic) of virtual currency (NEM). This makes it possible to convert items to virtual currency at a virtual currency exchange. In addition, it becomes easy to manage the total circulation amount of items and collect fees when transferring items. The item may be issued using an issue function other than the virtual currency (NEM) unique currency issue function (mosaic).

10 processing units, 12 storage units, 14 input units, 16 output units, 20 processing units, 22 storage units, 24 input units, 26 output units, 100 item transaction systems, 102 servers, 104 clients.

Claims (9)

Price determining means for determining a price of the item between a first user who owns the item to be electronically traded and a second user different from the first user;
Item delegation in which ownership of the item is delegated from the first user to the second user by paying the first user to the first user for the price determined by the price determination unit Means,
Database creation means for storing a history of ownership change in the item delegation means as a transaction history database;
An item trading system for trading the item via a network,
Reference is made to the number of users who own items of the same type as the item stored as the transaction history database, and there is provided value changing means for changing the effect of the item on the network or in the real world according to the number of users. A feature item trading system. The item transaction system according to claim 1,
The item transaction system according to claim 1, wherein the value changing means is changed so as to enhance the effect of the item as the number of users increases. The item transaction system according to claim 1 or 2,
Item trading system, characterized in that with reference to the transaction number of the item, to change the number of issued the item to be traded in accordance with the number of transactions. The item transaction system according to claim 3,
The item transaction system characterized by increasing the number of items issued as the number of transactions increases. The item transaction system according to claim 3 or 4,
An item transaction system, wherein the number of transactions is corrected in accordance with a past transaction status of a user involved in the item transaction. The item transaction system according to claim 5,
An item transaction system, wherein correction is performed so that the number of transactions increases as the number of past transactions of a user involved in the item transaction increases. The item transaction system according to any one of claims 1 to 6,
An item transaction system, wherein the item delegation means charges for the consideration payment. The item transaction system according to any one of claims 1 to 7,
The item transaction system according to claim 1, wherein the item is used for playing an electronic game. Computer
Price determining means for determining a price of the item between a first user who owns the item to be electronically traded and a second user different from the first user;
Item delegation in which ownership of the item is delegated from the first user to the second user by paying the first user to the first user for the price determined by the price determination unit Means,
Database creation means for storing a history of ownership change in the item delegation means as a transaction history database;
With reference to the number of users who own items of the same type as the item stored as the transaction history database, value changing means for changing the effect of the item on the network or in the real world according to the number of users;
An item transaction program that functions as an item transaction system.

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