Information processing device and information processing method

Abstract

To provide an information processing device allowing users to reduce labor for putting up tokens managed on a block chain, on sales stores.SOLUTION: An information processing device 1 according to an embodiment includes: a detection unit 132 for detecting that a user becomes a holder of tokens managed on a block chain; an acquisition unit 131 for acquiring listing start conditions for starting listing of the tokens, the conditions previously associated with at least one of the tokens and the user; a determination unit 133 for determining whether or not at least one of the tokens and the user satisfies the listing start conditions, on condition that the detection unit has detected that the user has become the token holder; and an output unit 134 for outputting information for allowing the user to put up the tokens on a predetermined sales place on condition that the determination part determines that the listing start conditions are satisfied.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an information processing device and an information processing method for processing information regarding transactions of tokens managed on a blockchain. [Background technology]

[0002] Patent Document 1 describes an invention in which, in response to a request from a user to put up a work for sale, a token indicating the ownership of the work is issued, and the issued token is sold on the blockchain. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-72 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the invention described in Patent Document 1, the user needs to set information such as the name and price of each work and then make a request to put up for sale. Therefore, when a user wants to sell multiple tokens corresponding to multiple works, the user has to take the trouble of setting information for each of the multiple tokens and making a request to put up for sale.

[0005] The present invention has been made in consideration of these points, and aims to enable users to reduce the effort required to put up tokens managed on a blockchain at a sales outlet. [Means for solving the problem]

[0006] An information processing device of a first aspect of the present invention has a detection unit that detects that a user has become a holder of a token managed on a blockchain; an acquisition unit that acquires a listing start condition for starting to list the token, which is pre-associated with at least one of the token and the user; a determination unit that determines whether at least one of the token and the user satisfies the listing start condition, on condition that the detection unit has detected that the user has become a holder of the token; and an output unit that outputs information for the user to list the token at a designated sales outlet, on condition that the determination unit has determined that the listing start condition has been satisfied.

[0007] The output unit may cause an information terminal used by the user to display information for putting the token up for sale at the sales outlet, on the condition that the determination unit determines that the listing start condition is satisfied.

[0008] The acquisition unit may acquire permission information indicating that the user permits the token to be put up for sale from the information terminal on which the output unit displays information for putting the token up for sale at the sales outlet, and the output unit may transmit information to the sales outlet to start the putting up of the token, on the condition that the acquisition unit has acquired the permission information.

[0009] The output unit may transmit to the sales outlet information for starting the listing of the token under transaction conditions that are pre-associated with at least one of the token and the user, on condition that the determination unit determines that the listing start condition is met.

[0010] The transaction conditions may be conditions for selling the token that were specified on an information terminal used by the user before the user became a holder of the token.

[0011] The terms of the transaction may be terms of the sale of the token that were associated with the token in the blockchain before the user became a holder of the token.

[0012] The terms of the transaction may be terms specified in association with the token by an issuer of the token or a past holder of the token.

[0013] The detection unit may detect that the user has become a holder of the token on condition that the token is associated with user identification information for identifying the user in the blockchain.

[0014] The auction start condition may be a condition for starting the auction of the token at the sales outlet that was specified on an information terminal used by the user before the user became a holder of the token.

[0015] The listing start condition may be a condition for starting listing the token at the sales outlet that was associated with the token in the blockchain before the user became a holder of the token.

[0016] The listing start condition may include that the token has characteristics specified in advance by the user.

[0017] The listing start conditions may include at least one of: the issuer of the token or a past holder of the token being a specified person or organization, and the means by which the user obtained the token being a specified means.

[0018] The auction start condition may include that the user has permitted the auction of the token on an information terminal used by the user before the user becomes the holder of the token.

[0019] The auction start conditions may include that the user has a predetermined characteristic.

[0020] An information processing method of a second aspect of the present invention includes the steps of: detecting, executed by a processor, that a user has become a holder of a token managed on a blockchain; acquiring a listing start condition for starting to list the token, which is pre-associated with at least one of the token and the user; determining whether or not at least one of the token and the user satisfies the listing start condition, on the condition that it has been detected in the step of detecting that the user has become the holder of the token; and outputting information for the user to list the token at a designated sales outlet, on the condition that it has been determined in the step of determining that the listing start condition has been satisfied. Effect of the Invention

[0021] According to the present invention, it is possible to reduce the effort required for users to put up tokens managed on a blockchain at a sales outlet. [Brief description of the drawings]

[0022] [Figure 1] 1 is a schematic diagram of an information processing system according to an embodiment. [Diagram 2] 1 is a block diagram of an information processing system according to an embodiment. [Diagram 3] 13 is a schematic diagram of a user terminal displaying a condition specification screen for a user to specify auction start conditions and transaction conditions. FIG. [Figure 4] 11 is a schematic diagram for explaining a process in which an information processing device detects that a user has a token. FIG. [Diagram 5] 11 is a schematic diagram of a user terminal displaying a selling information screen for displaying selling information. FIG. [Figure 6] FIG. 13 is a schematic diagram for explaining a process in which an information processing device automatically starts putting up tokens for sale at a sales outlet. [Figure 7] FIG. 1 is a flowchart illustrating an exemplary information processing method executed by an information processing device according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] [Outline of Information Processing System S] 1 is a schematic diagram of an information processing system S according to this embodiment. The information processing system S includes an information processing device 1, a user terminal 2, and a sales outlet server 3. The information processing system S may also include other devices such as servers and terminals.

[0024] The information processing device 1 is a computer that performs processing related to transactions of tokens managed on a blockchain. A token is information stored on a blockchain and is held by any user. A token can be bought and sold between users. A token is information indicating the ownership of predetermined digital data such as an image or music. A token is, for example, an NFT (Non-Fungible Token).

[0025] The token is stored in association with user identification information (user ID: Identifier) ​​for identifying the user who is the holder, by a blockchain constructed in, for example, the storage unit of the information processing device 1 or in the storage unit of a device different from the information processing device 1. The blockchain includes multiple blocks of data, and each block includes one or more transactions indicating that the token has been transferred (that the holder of the token has been changed). Each block in the blockchain includes a hash value generated according to a predetermined rule, and the accuracy of the entire blockchain is guaranteed by checking the consistency of the hash values ​​between blocks.

[0026] The user terminal 2 is an information terminal used by a user. The user is, for example, a person or organization that holds a token on the blockchain. The user terminal 2 is, for example, a smartphone, a tablet terminal, or a computer such as a personal computer. The user terminal 2 has an operation unit such as a touch panel or a keyboard for accepting operations, and a display unit such as a liquid crystal display for displaying information. The user terminal 2 is capable of communicating with the information processing device 1 and the sales outlet server 3 via a network.

[0027] The sales office server 3 is a computer that performs processing for users to buy and sell tokens on the blockchain. The sales office server 3 sells tokens put up for sale by a user to other users. When a token is bought or sold, the sales office server 3 also transfers assets (cryptocurrency or legal tender) corresponding to the price of the token from the user who purchased the token to the user who sold the token. The user terminal 2 is capable of communicating with the information processing device 1 and the user terminal 2 via a network.

[0028] An overview of the processing executed by the information processing system S according to this embodiment will be described below. The information processing device 1 acquires the auction start conditions and the transaction conditions of the token. The auction start conditions and the transaction conditions are, for example, specified in the user terminal 2 before the user becomes the holder of the token, or are associated with the token in advance. The auction start conditions are conditions for starting the auction of the token at the sales outlet, and include, for example, that the token has a predetermined characteristic. The transaction conditions are conditions for selling the token to another user, and include, for example, the price of the token.

[0029] The information processing device 1 detects that a user has become a holder of a token managed on the blockchain. For example, the information processing device 1 detects that a user has become a holder of a token on the condition that the token is associated with the user ID of the user in the blockchain.

[0030] The information processing device 1 determines whether or not at least one of the token and the user satisfies the auction start condition, on the condition that it has detected that the user has become the holder of the token. On the condition that it has determined that the auction start condition has been satisfied, the information processing device 1 outputs auction information for the user to auction the token at a specified sales outlet. The auction information is information for displaying information for auctioning the token at the sales outlet on the user terminal 2, or information for starting the auctioning of the token at the sales outlet.

[0031] In this way, the information processing system S determines whether the token satisfies the auction start condition in response to detecting that the user has become the holder of the token, and outputs information regarding the auction of the token to the sales outlet in response to determining that the token satisfies the auction start condition. In this way, the information processing system S can support the auction of tokens without the user having to check the tokens one by one, thereby reducing the effort required for the user to auction the token to the sales outlet.

[0032] [Configuration of Information Processing System S] FIG. 2 is a block diagram of an information processing system S according to this embodiment. In FIG. 2, arrows indicate main data flows, and data flows other than those shown in FIG. 2 may exist. In FIG. 2, each block indicates a configuration in functional units, not a configuration in hardware (device) units. Therefore, the blocks shown in FIG. 2 may be implemented in a single device, or may be implemented separately in multiple devices. Data may be exchanged between blocks via any means, such as a data bus, a network, or a portable storage medium.

[0033] The information processing device 1 includes a communication unit 11, a storage unit 12, and a control unit 13. The information processing device 1 may be configured by connecting two or more physically separate devices by wire or wirelessly. The information processing device 1 may also be configured by a cloud that is a collection of computer resources.

[0034] The communication unit 11 has a communication controller for transmitting and receiving data between the user terminal 2 and the sales server 3 via the network. The communication unit 11 notifies the control unit 13 of data received from the user terminal 2 and the sales server 3 via the network. The communication unit 11 also transmits data output from the control unit 13 to the user terminal 2 and the sales server 3 via the network.

[0035] The storage unit 12 is a storage medium including a ROM (Read Only Memory), a RAM (Random Access Memory), a hard disk drive, etc. The storage unit 12 stores in advance a program to be executed by the control unit 13. The storage unit 12 may be provided outside the information processing device 1, in which case data may be exchanged between the storage unit 12 and the control unit 13 via a network.

[0036] The control unit 13 has an acquisition unit 131, a detection unit 132, a determination unit 133, and an output unit 134. The control unit 13 is a processor such as a CPU (Central Processing Unit), and functions as the acquisition unit 131, the detection unit 132, the determination unit 133, and the output unit 134 by executing a program stored in the storage unit 12.

[0037] The process executed by the information processing system S will be described in detail below. First, the listing start conditions for starting listing of tokens and the transaction conditions for selling tokens will be described. In the information processing device 1, the acquisition unit 131 acquires the listing start conditions and transaction conditions specified by the user from the user terminal 2. For example, the acquisition unit 131 transmits display information for displaying a condition designation screen for the user to designate the listing start conditions and transaction conditions to the user terminal 2 used by the user. The user terminal 2 displays the condition designation screen on the display unit according to the display information received from the information processing device 1.

[0038] 3 is a schematic diagram of the user terminal 2 displaying a condition specification screen for the user to specify auction start conditions and transaction conditions. The condition specification screen includes, for example, an area for specifying auction start conditions and an area for specifying transaction conditions.

[0039] The area for specifying the auction start conditions accepts, for example, whether or not to permit the auction of a token, and the specification of the characteristics of the token to be auctioned. The characteristics of the token include, for example, the type of digital data (image, music, etc.) for which the token indicates ownership, and the content of the digital data (author, motif, genre, etc.). If the user does not specify the characteristics of the token, all tokens may be auctioned.

[0040] The area for specifying the transaction conditions accepts, for example, the specification of the price of the token. If the price is not specified by the user (such as when "specify each time" in FIG. 3 is selected), the price of the token may be specified by the user at the timing when the token is put up for auction.

[0041] In response to a predetermined operation (e.g., selection of the "Send" button) by the user, the user terminal 2 transmits information indicating the auction start conditions, including whether to permit the auction of the token and the characteristics of the token, and the transaction conditions, including the price of the token, specified by the user on the condition specification screen, to the information processing device 1. In the information processing device 1, the acquisition unit 131 accepts the auction start conditions and the transaction conditions indicated by the information received from the user terminal 2, and stores the accepted auction start conditions and transaction conditions in the storage unit 12 in association with the user ID of the user.

[0042] Next, a process in which the information processing device 1 detects that a user has a token will be described. Fig. 4 is a schematic diagram for explaining a process in which the information processing device 1 detects that a user has a token.

[0043] The acquisition unit 131 acquires information associated with the user ID of the user in the blockchain. The user's wallet illustrated in Fig. 4 is a collection of information associated with the user ID.

[0044] The detection unit 132 detects that a user has become a holder of a token managed on the blockchain based on the information acquired by the acquisition unit 131. The detection unit 132 detects that a user has become a holder of a token on the condition that a token (e.g., a token ID for identifying a token) is associated with the user ID of the user in the blockchain. The detection unit 132 may detect that a user has become a holder of multiple tokens when multiple tokens are associated with the user ID in the blockchain. The information processing device 1 performs subsequent processes for each of the one or multiple tokens detected by the detection unit 132 as being the holder of the user.

[0045] The acquisition unit 131 acquires the auction start conditions previously associated with at least one of the token detected by the detection unit 132 and the user. The acquisition unit 131 acquires the auction start conditions specified by the user on the user terminal 2 before becoming the holder of the token. The acquisition unit 131 acquires, for example, the auction start conditions (the auction start conditions specified on the condition designation screen in FIG. 3) associated with the user ID of the user in the storage unit 12.

[0046] The acquisition unit 131 may also acquire a listing start condition associated with a token in the blockchain before a user becomes a token holder. For example, the acquisition unit 131 acquires a listing start condition associated with a token (token ID) in the blockchain. In this case, the listing start condition is specified in advance in association with the token by the token issuer or a past holder of the token, and is stored in the blockchain.

[0047] The auction start condition includes at least one of the conditions described below. The auction start condition includes, for example, that the user has permitted the auction of the token on the condition specification screen displayed on the user terminal 2 illustrated in Fig. 3. This allows the information processing system S to automatically determine whether or not to auction the token on the sales floor only when the user wishes to do so.

[0048] The listing start condition includes, for example, that the token has characteristics specified on a condition specification screen displayed on the user terminal 2 illustrated in Fig. 3. In this case, the acquisition unit 131 identifies the characteristics of the token by referring to the token in the blockchain. This enables the information processing system S to make it easier for users to list tokens having the characteristics they desire at the sales outlet.

[0049] The listing start condition includes, for example, that the token issuer or the past holder of the token is a specified person or organization. In this case, the acquisition unit 131 identifies the token issuer or the past holder of the token by acquiring the token transaction in the blockchain. This enables the information processing system S to easily list the token issued by a specific issuer or held by a specific holder at the sales outlet.

[0050] The listing start condition includes, for example, that the means by which the user obtained the token is a specified means. The means by which the user obtained the token includes, for example, purchasing the token at a specific sales outlet, obtaining the token as a specific benefit, obtaining the token for a fee or free of charge, etc. In this case, the acquisition unit 131 identifies the means by which the user obtained the token by acquiring the token transaction in the blockchain. This allows the information processing system S to make it easier for the user to list the token obtained by a specific means at the sales outlet.

[0051] The listing start condition includes, for example, that the user has a predetermined characteristic. The user's characteristics include, for example, the user's gender, age, place of residence, place of origin, occupation, etc. In this case, the acquisition unit 131 identifies the user's characteristics by acquiring user information including the user's characteristics from the storage unit 12 or a device other than the information processing device 1. This enables the information processing system S to make it easier for a user with a specific characteristic to list tokens held by the user at a sales outlet.

[0052] The determination unit 133 determines whether or not at least one of the token and the user satisfies the auction start condition acquired by the acquisition unit 131, on the condition that the detection unit 132 detects that the user has become a holder of the token. The determination unit 133 determines whether or not one or more conditions included in the auction start condition described above are each satisfied.

[0053] The acquisition unit 131 acquires trading conditions previously associated with at least one of the token and the user, on condition that the determination unit 133 determines that the auction start condition is satisfied. The acquisition unit 131 acquires trading conditions specified by the user on the user terminal 2 before becoming the holder of the token. The acquisition unit 131 acquires, for example, trading conditions associated with the user ID of the user in the storage unit 12 (trading conditions specified on the condition designation screen in FIG. 3).

[0054] The acquiring unit 131 may also acquire transaction conditions associated with a token in the blockchain before a user becomes a token holder. The acquiring unit 131 acquires, for example, transaction conditions associated with a token (token ID) in the blockchain. In this case, the transaction conditions are specified in advance by the token issuer or a past holder of the token in association with the token and stored in the blockchain.

[0055] The transaction conditions include, for example, a price specified on a condition specification screen displayed on the user terminal 2 illustrated in Fig. 3. This allows the information processing system S to put up tokens on the sales outlet at a price previously desired by the user.

[0056] The output unit 134 outputs listing information for a user to list a token at a predetermined sales outlet, on condition that the determination unit 133 determines that the listing start condition is satisfied. The listing information is information for displaying information for listing a token at a sales outlet on the user terminal 2, or information for automatically starting listing of the token at the sales outlet.

[0057] When displaying information for putting up a token on the user terminal 2, the output unit 134 transmits, for example, listing information for the user to put up a token on a predetermined sales outlet to the user terminal 2. The user terminal 2 displays a listing information screen including the listing information received from the information processing device 1 on the display unit.

[0058] Fig. 5 is a schematic diagram of the user terminal 2 displaying a listing information screen for displaying listing information. The listing information includes, for example, token information (type, content, etc. of digital data for which the token indicates ownership) and transaction conditions (price, etc.) acquired by the acquisition unit 131. If no transaction conditions are specified by the user on the condition specification screen in Fig. 3, the listing information does not need to include the transaction conditions.

[0059] The selling information screen accepts the specification of transaction conditions. When the transaction conditions specified on the condition specification screen of Fig. 3 are displayed on the selling information screen, the selling information screen may accept changes to the displayed transaction conditions. The selling information screen may accept the specification of additional transaction conditions (the selling period in the example of Fig. 5) in addition to the displayed transaction conditions.

[0060] In response to a predetermined operation (e.g., selection of the "put up for sale" button) by the user, the user terminal 2 transmits permission information indicating permission to put up for sale of the token to the information processing device 1. In the information processing device 1, the acquisition unit 131 acquires the permission information from the user terminal 2.

[0061] The output unit 134 transmits information for starting the auction of the token to the sales office server 3 on the condition that the acquisition unit 131 has acquired the permission information. The information for starting the auction is, for example, information that associates the token ID of the token to be auctioned, the user ID of the user, and the transaction conditions acquired by the acquisition unit 131. The sales office server 3 starts the auction of the token on the blockchain in accordance with the information received from the information processing device 1. This allows the information processing system S to suggest to the user the auction of a token that satisfies the auction start conditions, thereby reducing the effort required for the user to start auctioning the token.

[0062] When automatically starting the auction of a token at a sales outlet, the output unit 134 transmits, for example, auction information to the sales outlet server 3 that starts the auction of a token under trading conditions that are pre-associated with at least one of the token and the user.

[0063] 6 is a schematic diagram for explaining a process in which the information processing device 1 automatically starts putting up tokens for sale at the sales outlet. The selling information is, for example, information that associates the token ID of the token to be put up for sale, the user ID of the user, and the transaction conditions acquired by the acquisition unit 131. The sales outlet server 3 starts putting up tokens for sale on the blockchain in accordance with the selling information received from the information processing device 1. This allows the information processing system S to automatically start putting up tokens that meet the selling start conditions at the sales outlet, thereby significantly reducing the effort required for the user to start putting up tokens for sale.

[0064] The output unit 134 may transmit listing information for starting the listing of tokens to a plurality of sales outlet servers 3 corresponding to a plurality of sales outlets. Each of the plurality of sales outlet servers 3 starts listing tokens on the blockchain in accordance with the listing information received from the information processing device 1. This enables the information processing system S to enable a user to start listing tokens at a plurality of sales outlets without additional effort.

[0065] [Information processing method flow] 7 is a diagram showing a flowchart of an exemplary information processing method executed by the information processing device 1 according to the present embodiment. The acquisition unit 131 acquires information associated with the user ID of the user in the blockchain. The detection unit 132 detects that the user has become a holder of a token managed on the blockchain based on the information acquired by the acquisition unit 131 (S11). The detection unit 132 detects that the user has become a holder of the token, for example, on the condition that the token is associated with the user ID of the user in the blockchain.

[0066] The acquisition unit 131 acquires the auction start condition that is previously associated with at least one of the token and the user detected by the detection unit 132 (S12). For example, the acquisition unit 131 acquires the auction start condition that is associated with the user ID of the user in the storage unit 12. For example, the acquisition unit 131 acquires the auction start condition that is associated with the token (token ID) in the blockchain.

[0067] The determination unit 133, on the condition that the detection unit 132 detects that the user has become the holder of the token, determines whether or not at least one of the token and the user satisfies the listing start conditions acquired by the acquisition unit 131 (S13).

[0068] When the determination unit 133 determines that the auction start condition is not satisfied (NO in S14), the information processing device 1 ends the process. When the determination unit 133 determines that the auction start condition is satisfied (YES in S14), the acquisition unit 131 acquires trading conditions previously associated with at least one of the token and the user (S15). The acquisition unit 131 acquires, for example, trading conditions associated with the user ID of the user in the memory unit 12. The acquisition unit 131 acquires, for example, trading conditions associated with the token (token ID) in the blockchain.

[0069] The output unit 134 outputs listing information for the user to list the token at a predetermined sales outlet, on condition that the determination unit 133 determines that the listing start condition is satisfied (S16). The listing information is information for displaying information for listing the token at a sales outlet on the user terminal 2, or information for automatically starting listing the token at the sales outlet.

[0070] The user terminal 2 displays on the display unit a selling information screen including the selling information received from the information processing device 1. The sales office server 3 starts putting up tokens on the blockchain in accordance with the selling information received from the information processing device 1.

[0071] [Effects of the embodiment] According to the information processing system S of this embodiment, the information processing device 1 determines whether the token satisfies the listing start condition in response to detecting that the user has become the holder of the token, and outputs information regarding the token listing to the sales outlet in response to determining that the token satisfies the listing start condition. This allows the information processing system S to support the listing of tokens without the user having to check the tokens one by one, thereby reducing the effort required for the user to list the tokens to the sales outlet.

[0072] Furthermore, this invention will make it possible to contribute to Goal 9 of the United Nations' Sustainable Development Goals (SDGs), which is to "build resilient infrastructure, promote industry, innovation and infrastructure."

[0073] Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. For example, all or part of the device can be configured by distributing or integrating functionally or physically in any unit. In addition, new embodiments resulting from any combination of multiple embodiments are also included in the embodiments of the present invention. The effect of the new embodiment resulting from the combination combines the effect of the original embodiment. [Explanation of symbols]

[0074] S Information Processing System 1. Information processing device 11 Communications Department 12 Storage section 13 Control section 131 Acquisition Department 132 Detection unit 133 Judgment section 134 Output section 2. User terminal 3. Sales Server

Claims

1. A detection unit that detects that a user has become a holder of a token managed on a blockchain; An acquisition unit that acquires a listing start condition for starting auction listing of the token, the condition being associated in advance with at least one of the token and the user; A determination unit that determines whether or not at least one of the token and the user satisfies the auction start condition, on the condition that the detection unit detects that the user has become a holder of the token; an output unit that outputs information for the user to put the token up for sale at a predetermined sales outlet, on condition that the determination unit determines that the listing start condition is satisfied; An information processing device having the above configuration.

2. The output unit, on the condition that the determination unit determines that the listing start condition is satisfied, causes an information terminal used by the user to display information for listing the token at the sales outlet. The information processing device according to claim 1 .

3. The acquisition unit acquires permission information indicating that the user permits the token to be put up for sale from the information terminal on which the output unit has displayed information for putting up the token at the sales outlet, The output unit transmits, to the sales outlet, information for starting the auction of the tokens on condition that the acquisition unit has acquired the permission information. The information processing device according to claim 2 .

4. The output unit transmits, to the sales outlet, information for starting the auction of the token under transaction conditions previously associated with at least one of the token and the user, on condition that the determination unit determines that the auction start condition is satisfied. The information processing device according to claim 1 .

5. The transaction conditions are conditions for selling the tokens that were specified on an information terminal used by the user before the user became a holder of the tokens. The information processing device according to claim 4.

6. the terms of the transaction are the terms of sale of the tokens that were associated with the tokens in the blockchain before the user became a holder of the tokens; The information processing device according to claim 4.

7. The terms of the transaction are terms specified in association with the token by an issuer of the token or a past holder of the token; The information processing device according to claim 6.

8. The detection unit detects that the user has become a holder of the token on the condition that the token is associated with user identification information for identifying the user in the blockchain. The information processing device according to claim 1 .

9. The listing start condition is a condition for starting listing the token at the sales outlet, which is specified on an information terminal used by the user before the user becomes a holder of the token. The information processing device according to claim 1 .

10. The listing start condition is a condition for starting listing the token at the sales outlet that was associated with the token in the blockchain before the user became a holder of the token, The information processing device according to claim 1 .

11. The listing start condition includes that the token has characteristics specified in advance by the user. The information processing device according to claim 1 .

12. The auction start conditions include at least one of: the token issuer or past holder of the token is a specified person or organization; and the means by which the user obtained the token is a specified means. The information processing device according to claim 1 .

13. The auction start condition includes that the user has permitted the auction of the token on an information terminal used by the user before the user becomes a holder of the token, The information processing device according to claim 1 .

14. The auction start condition includes that the user has a predetermined characteristic. The information processing device according to claim 1 .

15. The processor executes Detecting that a user has become a holder of a token managed on a blockchain; acquiring a listing start condition for starting listing of the token, the condition being associated in advance with at least one of the token and the user; A step of determining whether or not at least one of the token and the user satisfies the auction start condition, on the condition that it is detected in the step of detecting that the user has become the holder of the token; outputting information for the user to put the token up for sale at a predetermined sales outlet, on condition that it is determined in the step of determining that the listing start condition is satisfied; An information processing method comprising the steps of:

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