JP6850772B2 - Cryptocurrency management device, cryptocurrency management system, cryptocurrency management method and computer program - Google Patents

Description

The present invention relates to a virtual currency management device, a virtual currency management method, and a computer program.

A mechanism in which a requester who requests a task and a task executor who executes the task enter into a contractual relationship on the network, and the requester pays a reward to the task executor according to the execution task of the task executor. Are known.

The task is, for example, a task performed on the Internet, and is assumed to be a task of opening or reading a message, a task of answering a questionnaire, a contribution, a posting, a task of reviewing a predetermined event, or the like.

In such a contractual relationship on a network, it is known that smart contracts can be used to ensure that contracts are executed with peace of mind regardless of mutual trust. The smart contract uses blockchain technology, and it is possible to transfer property using virtual currency without the intervention of an intermediary. When the task is executed by the task executor, the smart contract pays the task executor the amount of the virtual currency deposited in advance from the requester according to the accomplished task. According to smart contracts, property can be exchanged without the intervention of an intermediary. In addition, since the rewards for tasks on the network as described above are often very low compared to the rewards generated in general contracts in the real world, the rewards are paid without incurring a man-in-the-middle fee. Being able to interact is very useful.

However, according to the materials submitted by the Financial Services Agency's "Study Group on Cryptocurrency Management, etc.", the population of Japan currently has a virtual currency trading account is about 3.5 million, and they receive compensation in virtual currency. It is assumed that there are many task executors who are not easy to do. Therefore, there is a need for a virtual currency management device that can easily pay rewards to task performers who are not easy to receive virtual currency while taking advantage of the high reliability and low fees of transactions by smart contracts. ing.

Japanese Unexamined Patent Publication No. 2016-151802 JP-A-2018-036893 Japanese Unexamined Patent Publication No. 2016-081134

Patent Document 1 is an invention of a virtual currency management method and the like, and describes that a virtual currency is issued to a user when a specific action is executed on an application of a user terminal. Patent Document 2 discloses a generation program that generates a smart contract on the assumption of payment between individuals on the Internet. However, neither document describes how a user who does not have a virtual currency trading account receives valuable value.

Patent Document 2 discloses an advertisement browsing promotion system that gives a privilege to a user who browses an advertisement by giving a two-dimensional code to the advertisement. However, this benefit also presupposes an electronic cryptocurrency based on the public key cryptosystem, and there is no description on how a user who does not have a trading account that can receive the electronic cryptocurrency receives valuable value.

Therefore, it is an object of the present invention to enable a task executor to select whether to receive a reward in virtual currency or another valuable value in a transaction by a smart contract.

The virtual currency management device according to one aspect of the present invention is connected to the executor terminal, the requester terminal, and the blockchain network through the network, and is associated with the requester having the requester terminal, and the executor terminal. It is detected that the smart contract is generated and the deposit necessary for the smart contract is generated from the requester terminal to the blockchain network and the point DB that stores the possessed points associated with the executor who has Based on the point deposit unit that grants points according to the deposited valuable value to the point DB, the request receiving unit that receives the point exchange request transmitted with the execution of the task by the executor terminal, and the point exchange request. , A task completion signal transmitting unit that transmits a task completion signal to the blockchain network, and a virtual currency receiving unit that receives virtual currency transmitted from the blockchain network in response to the task completion signal.

Further, the point deposit unit is configured to refer to the exchange rate of virtual currency and legal tender through the network and to give points according to the value to be deposited according to the exchange rate to the point DB. You may.

Further, when a task completion signal is transmitted from the executor terminal to the blockchain network, a receipt detection unit that detects that the executor terminal has received virtual currency corresponding to the task from the blockchain network is provided. Further, the receipt detection unit may be configured to revoke points corresponding to the virtual currency among the points held in the point DB.

Further, a point exchange unit for exchanging a valuable value corresponding to the amount of the virtual currency received by the virtual currency receiving unit for another valuable value may be further provided.

Further, when a discrimination request for determining whether to receive the reward for the task in virtual currency or points is transmitted from the executor terminal, a determination unit for determining which is to be received is further added. You may have it.

Further, the discriminating unit compares the exchange rate of the virtual currency and the legal tender at the first time point when the smart contract is generated with the exchange rate at the second time point when the task is executed, and said that. It may be configured to determine receipt in the form of the higher value of fiat currency for the reward.

The virtual currency management system according to one aspect of the present invention is a request to send a request for execution of a smart contract and a deposit process necessary for executing the smart contract to the blockchain network, the virtual currency management device, and the blockchain network. A system in which a person terminal and an executor terminal that executes a task, generates a point exchange request according to the task, and transmits the point exchange request to the virtual currency management device can communicate with each other via a network. The virtual currency management device includes a point DB that stores holding points associated with a requester having the requester terminal and holding points associated with an executor having the executor terminal, and the requester terminal from the requester terminal. A point deposit unit that detects that the smart contract has been generated and the deposit required to generate the smart contract has been performed on the blockchain network, and gives points according to the value to be deposited to the point DB. And the request receiving unit that receives the point exchange request transmitted with the execution of the task by the executor terminal, and the task completion signal transmission that transmits the task completion signal to the blockchain network based on the point exchange request. A virtual currency management system including a unit and a virtual currency receiving unit that receives virtual currency transmitted from the blockchain network in response to the task completion signal.

The method for managing virtual currency according to one aspect of the present invention is a method in which a performer terminal, a requester terminal, and a virtual currency management device connected to a blockchain network through a network manage virtual currency. The virtual currency management device has a holding point associated with a requester having the requester terminal and a point DB for storing the holding points associated with the executor having the executor terminal, and the virtual currency management device has a point DB associated with the executor having the executor terminal. A step of detecting that a smart contract has been generated and a deposit necessary for generating the smart contract has been made in the blockchain network, and points corresponding to the deposited valuable value are given to the point DB. , The step of receiving the point exchange request transmitted by the executor terminal together with the execution of the task, the step of transmitting the task completion signal to the blockchain network based on the point exchange request, and the task completion signal. Including a step of receiving virtual currency transmitted from the blockchain network according to the above.

The virtual currency management program according to one aspect of the present invention is a virtual currency management program executed by a computer connected to a performer terminal, a requester terminal, and a blockchain network through a network, and the computer is a computer. It has a point DB that stores the possession points associated with the requester having the requester terminal and the possession points associated with the executor having the executor terminal, and from the requester terminal to the blockchain network. By the command to detect that the smart contract is generated and the deposit necessary for the generation of the smart contract has been performed and to give points corresponding to the deposited valuable value to the point DB, and the executor terminal. , An instruction to receive a point exchange request transmitted with the execution of a task, an instruction to transmit a task completion signal to the blockchain network based on the point exchange request, and the blockchain in response to the task completion signal. Have the computer execute an instruction to receive virtual currency sent from the network.

According to the present invention, in a smart contract transaction, the task executor can choose whether to receive a reward in virtual currency or another valuable value.

It is a functional block diagram which shows the function provided with the virtual currency management apparatus which concerns on 1st Embodiment of this invention, and each configuration connected through a network. It is a sequence diagram which showed the flow of the process executed by the said virtual currency management apparatus in response to the request creation request from a requester. This is another example of a sequence diagram showing the flow of processing executed by the virtual currency management device in response to a request creation request from the requester. It is a sequence diagram which showed the flow of the process which the virtual currency is moved to the task executor by the virtual currency management apparatus according to the achievement of a task by a task executor. This is another example of a sequence diagram showing the flow of processing in which the virtual currency is moved to the task executor by the virtual currency management device according to the achievement of the task by the task executor. It is a sequence diagram which showed the flow of the process which points are given to the task executor by the virtual currency management apparatus according to the achievement of a task by a task executor, and the points are exchanged for further valuable value. It is a functional block diagram which shows the function which the virtual currency management apparatus which concerns on 2nd Embodiment of this invention has. It is a sequence diagram that the virtual currency management apparatus automatically determines whether a reward is paid to a task executor in virtual currency or in points.

Hereinafter, embodiments of the virtual currency management device according to the present invention will be described with reference to the drawings.

● Virtual currency management device (1) ●
FIG. 1 shows the configuration of the virtual currency management device 1 according to the embodiment of the present invention. The virtual currency management device 1 is a device (example of a computer) that generates a "smart contract", which is a program showing a contract such as a commercial transaction on a platform using a public blockchain, in response to a request from a client. In a smart contract, a predetermined task and a reward corresponding to the task are linked and managed as a contract, and when the task executor executes the task, the linked reward is paid. The virtual currency management device 1 is a device that, when a task is executed by a task executor, pays the task executor a reward in virtual currency or another valuable value based on the contents contracted by the smart contract.

In the present embodiment, the task also includes a task of opening a bank account or the like, registering or using a service. These tasks are called performance-based advertising (also known as "affiliate marketing"). When the task specified for the advertisement is executed, the requester, that is, the advertiser pays the task executor a reward. In this case, the requester is assumed to be an advertiser, and the task executor is assumed to be a general consumer. The task also includes a task that allows the requester to cite a post on an SNS or blog by the task executor. In this case, the requester is assumed to be the operator of the curation site, the curator, various mass media, and the like. The task executor is assumed to be an SNS user, a blog writer, or the like.

In this description, a predetermined platform that uses the blockchain is referred to as a blockchain network 50. The blockchain network 50 is a network capable of trading with existing cryptocurrencies using blockchain such as Ethereum. In addition, it may be possible to trade with a unique virtual currency.

A smart contract in the blockchain network 50 is a contract made on the blockchain network 50. A smart contract is a program that is written in a digital format and automatically executes processing according to the preset contents when the conditions set as the contract contents are achieved. The blockchain has a mechanism for maintaining the reliability of information without the need for a central management system or the like. Therefore, by generating a smart contract, the requester and the task executor can perform a commercial transaction without going through a server or the like that mediates the commercial transaction.

In the present embodiment, for example, the requester generates a smart contract for paying a predetermined reward to the executor who has executed a certain task such as "opening an email". Then, the blockchain network 50 manages this smart contract. In addition, the task executor can know the content of the task associated with the smart contract, for example, from an e-mail or an Internet site. When the task executor executes the "open mail" task and a signal indicating that the task is completed (hereinafter, also referred to as "task completion signal") is received by the blockchain network 50, the blockchain network 50 receives the task. Pay the reward corresponding to the completed task to the account associated with the terminal that sent the task completion signal.

As shown in FIG. 1, the virtual currency management device 1 includes a requester terminal 30 used by a client, an executor terminal 40 used by a task executor, a blockchain network 50, a legal tender rate storage unit 60, and a network. It is configured to be able to communicate via the NW. Communication between the virtual currency management device 1, the requester terminal 30, the performer terminal 40, the blockchain network 50, and the legal tender rate storage unit 60 is wireless in this embodiment, but some or all of the connections are made. It may be wired.

● Requester terminal 30
The requester terminal 30 is a terminal operated by a requester of a task such as an advertiser. The requester terminal 30 can input the content of the task, the reward paid to the task executor when the task is executed, and the total number of tasks. Further, the requester terminal 30 can transmit a deposit signal for depositing the deposit property necessary for generating the smart contract in the blockchain network 50 at the time of creating the request. The deposited property is, for example, a valuable value equal to or greater than the total amount of reward set for the task to be input. The deposited property is paid from the client's account and is managed on the blockchain network 50 as, for example, virtual currency, more specifically cryptocurrency.

The client terminal 30 is, for example, a smartphone, a tablet terminal, or a computer. The requester terminal 30 uses a CPU (Central Processing Unit), a computer program executed by the CPU, a computer program, a RAM (Random Access Memory) or a ROM (Read Only Memory) for storing predetermined data, or the like, and is used as an input / output unit 31. A functional block including a communication processing unit 32 and a communication processing unit 32 is configured.

The input / output unit 31 is realized by a display or touch panel for inputting / outputting data, a microphone or speaker for inputting / outputting audio data, and the like.

The communication processing unit 32 is a processing unit capable of executing data transmission / reception processing according to a predetermined protocol with the virtual currency management device 1 and the blockchain network 50 via a network NW such as the Internet, and is an application or a Web. It is realized by a browser or the like.

● Executor terminal 40
The executor terminal 40 is a terminal operated by a task executor who executes a task. The executor terminal is notified of information about the task from the requester terminal 30. The information about the task is, for example, the content of the task and the reward to be set. Further, the executor terminal 40 transmits a signal indicating that the request has been accepted (hereinafter, also referred to as “acceptance signal”) in response to the notification of information regarding the task. Further, the executor terminal 40 is configured to be able to execute a task. That is, for example, the executor terminal 40 sends an e-mail opening operation, a sentence input by the task executor, information indicating that the requester's offer has been approved by the task executor, and the like to a predetermined destination. Includes actions to be taken.
Etc. are possible.

The executor terminal 40 is, for example, a smartphone, a tablet terminal, or a computer. The executor terminal 40 uses a CPU (Central Processing Unit), a computer program executed by the CPU, a RAM (Random Access Memory) or a ROM (Read Only Memory) for storing the computer program and predetermined data, and the like. A functional block including a virtual currency receipt request unit 42, a point receipt request unit 43, a consent transmission unit 44, and a communication processing unit 45 is configured.

The input / output unit 41 is realized by a display or touch panel for inputting / outputting data, a microphone or speaker for inputting / outputting audio data, and the like. The input / output unit 41 can input an operation for executing a task. In addition, the input / output unit 41 can input the selection result of whether the task executor receives the reward corresponding to the task in virtual currency or another valuable value.

The virtual currency receiving request unit 42 transmits a task completion signal to the blockchain network 50 when an instruction to receive a reward corresponding to the executed task in the virtual currency is received from the input / output unit 41. It is a functional part to do.

The point receiving request unit 43 has a function of transmitting a point receiving request to the request receiving unit 13 described later of the virtual currency management device 1 when the selection to receive the reward for the executed task by points is input. It is a department. Point is another example of valuable value. Upon receiving the point receipt request, the virtual currency management device 1 transmits a task completion signal to the blockchain network 50.

The consent transmission unit 44 is a functional unit that transmits a consent signal to the blockchain network 50 in response to the notification of information about the task. Further, the consent transmission unit 44 may transmit a consent request to the virtual currency management device 1 instead of the consent signal. Upon receiving the consent request, the virtual currency management device 1 transmits a consent signal from the consent signal transmission unit 19, which will be described later, to the blockchain network 50.

The communication processing unit 45 is a processing unit capable of executing data transmission / reception processing according to a predetermined protocol with the virtual currency management device 1 and the blockchain network 50 via a network NW such as the Internet, and is an application or a Web. It is realized by a browser or the like.

● Legal tender rate storage unit 60
The legal tender rate storage unit 60 is a storage device that stores the current rates of the virtual currency managed by the blockchain network 50 and the legal tender. The virtual currency management device 1 can acquire the current virtual currency-legal currency rate from the legal tender rate storage unit 60 through the network NW. Further, the legal tender rate storage unit 60 may also store the past virtual currency-legal tender rate and can be referred to by the virtual currency management device 1.

● Virtual currency management device 1
As described above, when the task is executed by the task executor, the virtual currency management device 1 rewards the task executor with the virtual currency or another valuable value based on the contents contracted by the smart contract. It is a device that pays. Specifically, the virtual currency management device 1 receives a request from the requester terminal 30, and records the virtual currency deposited in the blockchain network 50 by the operation of the requester terminal 30 as points of the same amount. Then, when the executor terminal 40 receives the reward with points, the virtual currency management device 1 transmits a task completion signal to the blockchain network 50, receives the reward virtual currency, and then corresponds to the reward. It is exchanged for points and sent to the executor terminal 40. At the same time, the deposited points are amortized. When the executor terminal 40 receives the reward in the virtual currency, it detects that the virtual currency has moved from the blockchain network 50 to the executor terminal 40 and invalidates the deposited points.

As shown in FIG. 1, the virtual currency management device 1 includes a point DB 11, a point deposit unit 12, a request receiving unit 13, a task completion signal transmitting unit 14, a virtual currency receiving unit 15, a point exchange unit 16, and a receiving detecting unit 17. Each functional block including a point revocation unit 18, a consent signal transmission unit 19, and a communication processing unit 20 is configured.

The point DB 11 is a database that stores the possessed points associated with the requester having the requester terminal 30 and the possessed points associated with the executor having the executor terminal 40.

The point deposit unit 12 detects that the requester terminal 30 has generated the smart contract and the deposit necessary for the generation of the smart contract to the blockchain network 50, and points points according to the value to be deposited. It is a functional unit given to the account associated with the requester of DB11. Rewards are set in virtual currency on smart contracts. Also, the rate between points and legal tender, for example yen, is constant. Therefore, the point deposit unit 12 refers to the virtual currency-legal tender rate received from the legal tender rate storage unit 60, converts the reward into points, and grants the reward to the client's account.

The request receiving unit 13 is a functional unit that receives the point exchange request generated by the executor terminal 40.

The task completion signal transmission unit 14 is a functional unit that transmits a task completion signal to the blockchain network 50 based on the point exchange request.

The virtual currency receiving unit 15 is a functional unit that receives virtual currency transmitted from the blockchain network 50 in response to a task completion signal.

The point exchange unit 16 exchanges points corresponding to the amount of virtual currency received for yet another valuable value, and amortizes the exchanged points among the points held by the executor stored in the point DB. It is a functional part to do. Another valuable value is assumed to be another virtual currency such as a gift certificate or yen Peg currency. The exchange for another valuable value may be, for example, electronically sending the execution keyword of a gift certificate or a discount ticket, or accessing a predetermined Internet site and giving a number such as a prepaid card to the task executor. By inputting it, the valuable value held by the card may be increased. In addition, gift certificates and the like may be sent by mail. In addition, it may be exchangeable for a predetermined goods or service.

The receipt detection unit 17 is a functional unit that detects that the virtual currency has been transferred from the blockchain network 50 to the executor terminal 40.

The point revocation unit 18 is a functional unit that revokes points from the point DB 11. When the receipt detection unit 17 detects the movement of the virtual currency, the point expiration unit 18 calculates points corresponding to the amount of the transferred virtual currency from the points associated with the executor terminal 40 stored in the point DB 11. Reduce the amount. The amount of points to be deducted is determined based on the rate at which the smart contract was generated.

The consent signal transmission unit 19 has a function of receiving a notification of the request from the executor terminal 40, and when the executor terminal 40 approves the request, the executor terminal 40 transmits a consent signal for notifying the blockchain network 50 to that effect. It is a department. When sending a consent signal to the blockchain network 50, it may be necessary to pay a small amount of virtual currency to the blockchain network 50. Therefore, according to the configuration in which the consent signal is transmitted from the virtual currency management device 1, the virtual currency is transmitted even when the executor does not have the virtual currency, as compared with the case where the consent signal is directly transmitted from the executor terminal 40. The request can be accepted through the management device 1. Further, even when the executor holds the virtual currency, the management of the virtual currency related to a series of smart contracts can be centralized in the virtual currency management device 1.

The communication processing unit 20 is a processing unit capable of executing data transmission / reception processing according to a predetermined protocol with the virtual currency management device 1 and the blockchain network 50 via a network NW such as the Internet, and is an application or a Web. It is realized by a browser or the like.

● Flow in which the requester terminal 30 creates a request by a smart contract via the virtual currency management device 1. As shown in FIG. 2, the requester terminal 30 first requests the virtual currency management device 1 to create a request. (Step S101). The information included in the request for making a request includes, for example, the content of the task, the reward amount set for the task, and the number of tasks.

The virtual currency management device 1 requests a virtual currency-legal currency rate from the legal tender rate storage unit 60 (step S102). The legal tender rate storage unit 60 transmits the virtual currency-legal tender rate at the time when the request is received based on the request (step S103).

The virtual currency management device 1 transmits a contract generation request to the requester terminal 30 (step S104).

When the requester terminal 30 receives the contract generation request, the requester terminal 30 notifies the requester to that effect, and the requester terminal 30 transmits a contract generation signal to the blockchain network 50 based on the instruction from the requester. (Step S105). Further, the client terminal 30 transmits the valuable value corresponding to the total amount of the reward included in the contract to the blockchain network 50 as a deposit property (step S106). This reward is set in virtual currency, and the valuable value corresponding to the total amount of reward is determined with reference to the virtual currency-legal tender rate acquired in step S103. Steps S105 and S106 are in no particular order and may be performed at the same time.

The instruction from the requester may be omitted here, assuming that the consent has been obtained at the time of the request creation request (step S101) by the requester. That is, the client terminal 30 may automatically transmit the contract generation signal and the reward deposit signal to the blockchain network 50 based on the contract execution request (step S104) from the virtual currency management device 1.

The blockchain network 50 confirms the deposited property received from the client terminal 30 (step S107). Thus, a smart contract based on the request from the requester terminal 30 is generated.

The point deposit unit 12 possessed by the virtual currency management device 1 detects that the deposit has been confirmed by the blockchain network 50, and transfers points according to the value to be deposited to the account associated with the client of the point DB 11. Grant (step S108). Further, the virtual currency management device 1 notifies the executor terminal 40 that there is a task execution request from the requester terminal 30 and the content of the request (step S109).

The executor terminal 40 that has received the notification transmits a signal (hereinafter, also referred to as “acceptance signal”) to the effect that the request has been received to the blockchain network 50 (step S110).

As shown in FIG. 3, the executor terminal 40 may transmit a request for acceptance of the request to the virtual currency management device 1 instead of the acceptance signal (step S120). In this case, the virtual currency management device 1 that has received the request for acceptance of the request transmits an acceptance signal to the blockchain network 50 (step S121).

● Flow in which the executor terminal 40 receives a reward in virtual currency As shown in FIG. 4, first, a task is executed by an executor's operation on the executor terminal 40 (step S201). The task may be automatically executed by a predetermined program. Next, a receipt request in virtual currency from the executor is input to the executor terminal 40 (step S202). The virtual currency receipt requesting unit 42 of the executor terminal 40 transmits a task completion signal to the blockchain network 50 (step S203). The task is not limited to an active operation, and may be a task that is accomplished when a predetermined time elapses from the transmission of the consent signal. In this case, the task completion signal is automatically transmitted after a predetermined time from the transmission of the consent signal.

As shown in FIG. 5, the virtual currency receiving request unit 42 may transmit the task completion request to the virtual currency management device 1 instead of the task completion signal (step S213). In this case, the virtual currency management device 1 that has received the task completion request transmits a task completion signal to the blockchain network 50 (step S214). When transmitting a task completion signal to the blockchain network 50, it may be necessary to pay a small amount of virtual currency to the blockchain network 50. Therefore, according to the configuration in which the task completion signal is transmitted from the virtual currency management device 1, the virtual currency management device 1 can unify the management of virtual currency related to a series of smart contracts.

As shown in FIGS. 4 and 5, when the blockchain network 50 receives the task completion signal, the reward corresponding to the task recorded in the contract is transferred as virtual currency to the virtual currency account of the executor ( Step S204).

The receipt detection unit 17 of the virtual currency management device 1 detects that the virtual currency has been transferred from the blockchain network 50 to the virtual currency account of the executor (step S205). Based on this, the point revocation unit 18 revokes the points corresponding to the virtual currency among the points held by the client stored in the point DB 11 (step S206).

In addition, based on the reception of the task completion signal, among the points held by the requester stored in the point DB 11, the points corresponding to the reward are moved to the points held by the executor, and then the points corresponding to the reward. The same effect can be obtained by revoking. According to this configuration, by referring to the balance record of the point DB 11, it is possible to acquire all the task completion records of the task executor regardless of the form of the received reward.

● Flow in which the executor terminal 40 receives a reward for points and yet another valuable value As shown in FIG. 5, first, a task is executed by an executor's operation on the executor terminal 40 (step S301). The task may be automatically executed by a predetermined program. The executor terminal 40 receives a receipt request with another valuable value from the executor (step S302).

The task completion signal transmission unit 14 of the virtual currency management device 1 transmits a task completion signal to the blockchain network 50 (step S303). When the blockchain network 50 receives the task completion signal, the blockchain network 50 moves the reward corresponding to the task to the virtual currency management device 1 as virtual currency (step S304). The virtual currency receiving unit 15 receives this.

The point exchange unit 16 exchanges points corresponding to the amount of received virtual currency for yet another valuable value and sends it to the executor (step S305), and exchanges the points stored in the point DB 11 among the points held. Amortize the points for the amount (step S306).

The virtual currency management device 1 may exchange only the points corresponding to the reward set in the contract each time the task is executed, or the points owned by the client stored in the point DB 11 may be exchanged. It is also possible to move the points held by the performer and hold them, and then exchange the held points for another valuable value.

According to this configuration, on the blockchain network 50, it is possible to implement a highly reliable smart contract by managing the reward with virtual currency, while the task executor also rewards with valuable value other than virtual currency. It can be received and can be more convenient for the task executor.

● Virtual currency management device (2) ●
The second embodiment of the virtual currency management device according to the present invention will be described focusing on the parts different from the first embodiment. This virtual currency management device is different from the first embodiment in that it has a discriminating unit that automatically determines whether the task executor receives the reward in virtual currency, points, or another valuable value. different. The same reference numerals are given to the same configurations as those in the first embodiment.

As shown in FIG. 5, the virtual currency management device 100 of the second embodiment has a discriminating unit 21. When the executor terminal 40 sends a discrimination request requesting discrimination as to whether to receive the reward for the task in virtual currency or in points or yet another valuable value, the discrimination unit 21 receives the reward. To determine. In the present embodiment, the discriminating unit 21 compares the conversion rate of the virtual currency and the legal tender at the first time point when the smart contract is generated with the conversion rate at the second time point when the task is executed. , Decide to receive in the form of the higher value of fiat currency for the reward.

● Flow in which the executor terminal 40 receives a reward for another valuable value As shown in FIG. 6, first, the task is executed by the executor's operation on the executor terminal 40 (step S401). The task may be automatically executed by a predetermined program. Next, the executor terminal 40 transmits a determination request requesting the virtual currency management device 100 to determine whether to receive the reward for the task in virtual currency, points, or another valuable value (step S402). ).

The task completion signal transmission unit 14 transmits a task completion signal to the blockchain network 50 (step S403), and the blockchain network 50 pays a reward according to the task to the virtual currency receiving unit 15 in virtual currency. (Step S404).

The virtual currency management device 100 requests the legal tender-legal currency rate from the legal tender rate storage unit 60 (step S405). The legal tender rate storage unit 60 transmits the virtual currency-legal tender rate at the time when the task is executed to the virtual currency management device 100 (step S406).

The determination unit 21 compares the virtual currency-legal tender rate at the first time when the smart contract is generated with the virtual currency-legal tender rate at the second time when the task is executed, and compares the legal currency for the reward. It is determined to receive in the form of the higher value (step S407). As the conversion rate at the first time point, the discriminating unit 21 may hold the information acquired at the time of generating the smart contract, and in step S406, the virtual currency-legal currency rate at the first time point and the second time point is statutory. It may be obtained from the currency rate storage unit 60.

The virtual currency management device 100 sends a reward to the executor terminal 40. When the determination unit 21 determines the receipt in virtual currency, the virtual currency transmission unit 22 sends the virtual currency to the executor terminal 40. When the determination unit 21 determines the receipt of points, the point exchange unit 16 exchanges the points for the points and sends the points to the executor (step S408). Next, the point exchange unit 16 or the point expiration unit 18 amortizes or expires the amount of points corresponding to the sent reward from the point DB 11 (step S409).

According to this configuration, the task executor can reliably receive the reward amount set by the client at the first time when the smart contract is created, regardless of the fluctuation of the virtual currency-legal tender rate. .. On the other hand, if the rate of the virtual currency soars between the first and second points, receiving it in the virtual currency will get a greater value than the amount deposited by the client at the time of creating the smart contract. Can be done. In other words, the task executor can obtain the investment profit from the virtual currency in the period from the first time point to the second time point. That is, the task executor can obtain an opportunity to receive the investment profit due to the fluctuation of the virtual currency-legal tender rate while guaranteeing the minimum amount of the reward for the task.

In addition, the discrimination unit 21 determines the receiving form of the reward requested to be discriminated based on the selection result of whether to receive the reward for the task in the virtual currency or the points, which has been input from the executor terminal 40 in the past. You may decide. For example, it may be configured to store the previous receipt form and receive it in the same form as the previous one.

1 Virtual currency management device 11 point DB
12 Point deposit unit 13 Request reception unit 14 Task completion signal transmission unit 15 Virtual currency reception unit 16 Point exchange unit 17 Receipt detection unit 18 Discrimination unit 30 Requester terminal 40 User terminal

Claims (9)

Connected to the performer terminal, requester terminal, and blockchain network through the network,
A point DB that stores the possessed points associated with the requester having the requester terminal and the possessed points associated with the executor having the executor terminal, and
It is detected that a smart contract has been generated and a deposit necessary for generating the smart contract has been made from the client terminal to the blockchain network, and points corresponding to the deposited valuable value are set as the point DB. The point deposit department to be given to
A request receiving unit that receives a point exchange request transmitted with the execution of a task by the executor terminal, and
A task completion signal transmission unit that transmits a task completion signal to the blockchain network based on the point exchange request.
A virtual currency receiving unit that receives virtual currency transmitted from the blockchain network in response to the task completion signal, and
A virtual currency management device equipped with. The virtual according to claim 1, wherein the point deposit unit refers to exchange rates of virtual currency and legal tender through a network, and grants points according to the value to be deposited according to the exchange rate to the point DB. Currency management device. Further provided is a receipt detection unit that detects that the executor terminal has received the virtual currency corresponding to the task from the blockchain network when the task completion signal is transmitted from the executor terminal to the blockchain network. , The receipt detection unit invalidates the points corresponding to the virtual currency among the points held in the point DB.
The virtual currency management device according to claim 1 or 2. A point exchange unit for exchanging a valuable value corresponding to the amount of the virtual currency received by the virtual currency receiving unit for another valuable value is further provided.
The virtual currency management device according to any one of claims 1 to 3. When a discrimination request for determining whether to receive the reward for the task in virtual currency or points is transmitted from the executor terminal, a determination unit for determining which is to be received is further provided.
The virtual currency management device according to any one of claims 1 to 4. The discriminating unit compares the exchange rate of virtual currency and fiat currency at the first time point when the smart contract is generated with the exchange rate at the second time point when the task is executed, and with respect to the reward. Decide to receive in the form of the higher value of fiat currency,
The virtual currency management device according to claim 5. Blockchain network and
Virtual currency management device and
A requester terminal that sends a request for execution of a smart contract to the blockchain network and a deposit process necessary for executing the smart contract, and a requester terminal.
An executor terminal that executes a task, generates a point exchange request according to the task, and sends it to the virtual currency management device.
Is a system that is configured to be able to communicate via a network
The virtual currency management device is
A point DB that stores the possessed points associated with the requester having the requester terminal and the possessed points associated with the executor having the executor terminal, and
It is detected that a smart contract has been generated and a deposit necessary for generating the smart contract has been made from the client terminal to the blockchain network, and points corresponding to the deposited valuable value are set as the point DB. The point deposit department to be given to
A request receiving unit that receives a point exchange request transmitted with the execution of a task by the executor terminal, and
A task completion signal transmission unit that transmits a task completion signal to the blockchain network based on the point exchange request.
A virtual currency receiving unit that receives virtual currency transmitted from the blockchain network in response to the task completion signal, and
A virtual currency management system equipped with. A virtual currency management device connected to a performer terminal, a requester terminal, and a blockchain network through a network is a method of managing virtual currency.
The virtual currency management device has a point DB that stores holding points associated with a requester having the requester terminal and holding points associated with an executor having the executor terminal.
It is detected that a smart contract has been generated and a deposit necessary for generating the smart contract has been made from the client terminal to the blockchain network, and points corresponding to the deposited valuable value are set as the point DB. And the steps to give to
The step of receiving the point exchange request transmitted by the executor terminal with the execution of the task, and
A step of transmitting a task completion signal to the blockchain network based on the point exchange request, and
The step of receiving the virtual currency transmitted from the blockchain network in response to the task completion signal, and
How to manage cryptocurrencies, including. A virtual currency management program that is executed by the performer terminal, the requester terminal, and the computer connected to the blockchain network through the network.
The computer has a holding point DB associated with a requester having the requester terminal and a holding point associated with the executor having the executor terminal.
It is detected that a smart contract has been generated and a deposit necessary for generating the smart contract has been made from the client terminal to the blockchain network, and points corresponding to the deposited valuable value are set as the point DB. And the instructions given to
An instruction to receive a point exchange request transmitted with the execution of a task by the executor terminal, and
An instruction to send a task completion signal to the blockchain network based on the point exchange request, and
An instruction to receive virtual currency transmitted from the blockchain network in response to the task completion signal, and
A virtual currency management program that lets your computer run.

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