JP7020739B1 - Trading system, trading method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To support safe transactions. SOLUTION: In a transaction support system, a transfer instruction input unit that receives an instruction to transfer a digital asset from a first user who is the owner of the digital asset to a second user, and a third user who owns the digital asset. The first transfer processing unit that changes to, the payment confirmation unit that confirms the completion of payment from the second user to the first user, and the owner of the digital asset from the third user after confirming the completion of payment. It is characterized by including a second transfer processing unit that changes to a second user. [Selection diagram] Fig. 1

Description

The present invention relates to a trading system, a trading method and a program.

Escrow services for commerce are known.

Japanese Patent Application Laid-Open No. 2002-183483

When selling digital merchandise, the merchandise arrives before payment.

The present invention has been made in view of such a background, and an object of the present invention is to provide a technique capable of supporting safe transactions.

The main invention of the present invention for solving the above problems is a transaction support system, which is a transfer instruction input unit that receives an instruction to transfer the digital asset from a first user who is the owner of the digital asset to a second user. A first transfer processing unit that changes the owner of the digital asset to a third user, a payment confirmation unit that confirms the completion of payment from the second user to the first user, and a payment confirmation unit. It is characterized by including a second transfer processing unit that changes the owner of the digital asset from the third user to the second user after confirming.

Other problems disclosed in the present application and solutions thereof will be clarified by the columns and drawings of the embodiments of the invention.

According to the present invention, safe transactions can be supported.

It is a figure which shows the configuration example of the transaction system which concerns on this embodiment. It is a figure explaining the outline of the transaction in this embodiment. It is a figure which shows the hardware configuration example of the transaction server 40. It is a figure which shows the software configuration example of a transaction server 40. It is a figure explaining the operation of the transaction system of this embodiment. It is a figure explaining the transfer of NFT in a trading system.

<Outline of the invention>
The contents of the embodiments of the present invention will be described in a list. The present invention includes, for example, the following configuration.
[Item 1]
A transfer instruction input unit that accepts an instruction to transfer the digital asset from a first user who is the owner of the digital asset to a second user, and a transfer instruction input unit.
The first transfer processing unit that changes the owner of the digital asset to a third user,
A payment confirmation unit that confirms the completion of payment from the second user to the first user,
A second transfer processing unit that changes the owner of the digital asset from the third user to the second user after confirming the completion of the payment.
A transaction support system characterized by being equipped with.
[Item 2]
A transfer instruction input unit that accepts an instruction to transfer the non-fangable token from a first user who is the owner of the non-fangable token to a second user, and a transfer instruction input unit.
A first transfer processing unit that transfers the non-fundable token from the wallet of the first user to the wallet of the third user.
A payment confirmation unit that confirms the completion of payment from the second user to the first user,
After confirming the completion of the payment, the second transfer processing unit that transfers the non-fangible token from the wallet of the third user to the wallet of the second user, and the second transfer processing unit.
A transaction support system characterized by being equipped with.
[Item 3]
When the computer transfers the digital asset from the first user who is the owner of the digital asset to the second user,
Change the owner of the digital asset to a third user
After confirming the completion of payment from the second user to the first user,
Changing the owner of the digital asset from the third user to the second user,
A transaction support method characterized by.
[Item 4]
When the non-fungible token is transferred from the first user who is the owner of the non-fangable token to the second user, the computer determines.
The non-fundable token is transferred from the wallet of the first user to the wallet of the third user.
After confirming the completion of payment from the second user to the first user,
Transferring the non-fundable token from the wallet of the third user to the wallet of the second user.
A transaction support method characterized by.
[Item 5]
When transferring the digital asset from the first user who is the owner of the digital asset to the second user, the computer
The step of changing the owner of the digital asset to a third user,
A step of confirming the completion of payment from the second user to the first user, and
After confirming the completion of the payment, the step of changing the owner of the digital asset from the third user to the second user, and
A program to execute.
[Item 6]
When transferring the non-fangable token from the first user who is the owner of the non-fangable token to the second user, the computer
The step of transferring the non-fundable token from the wallet of the first user to the wallet of the third user,
A step of confirming the completion of payment from the second user to the first user, and
After confirming the completion of the payment, the step of transferring the non-fangable token from the wallet of the third user to the wallet of the second user, and
A program to execute.

<Overview of the system>
FIG. 1 is a diagram showing a configuration example of a transaction system according to the present embodiment. The transaction system of the present embodiment includes a transaction server 40. The transaction server 40 is communicably connected to the user terminal 10, the sales server 20, and the payment server 30 via a communication network. The transaction server 40 is also communicably connected to the blockchain network 50. The sales server 20 is also communicably connected to the blockchain network 50.

The blockchain network 50 is composed of a plurality of nodes (computers) and can manage ledger data in a distributed manner. The distributed ledger is managed to be difficult to tamper with by the so-called blockchain mechanism. As for the distributed ledger management mechanism by the blockchain, a general one is adopted, and detailed description thereof will be omitted here. The blockchain network 50 can be constructed by, for example, Ethereum.

Tokens (Ethereum tokens) that can be issued by a blockchain network 50 such as Ethereum include fungable tokens and non-fungible tokens (non-fungible tokens: NFT). Unlike fungible tokens, NFTs are non-substitutable tokens. NFTs can have a unique value that distinguishes them from other NFTs. Therefore, the NFT has a unique identifier (NFT-ID) for distinguishing it from other NFTs. An NFT is, for example, a token issued in accordance with the ERC (Ethereum Request for Comments) 721 standard. NFTs that comply with the ERC721 standard are also referred to as NFT-721 tokens. In this embodiment, as an example, it is assumed that the NFT is an NFT-721 token. NFTs can be traded on the blockchain network 50, similar to fungable tokens. The NFT transaction history is recorded in the blockchain network 50. In the distributed ledger of the blockchain network 50, the owner (owner) of the NFT and the ownership history are also recorded.

The transaction system according to the present embodiment is intended to ensure that payment is made when NFTs are distributed among end users.

The user terminal 10 is a computer operated by an end user (hereinafter, simply referred to as a user). The user terminal 10 is, for example, a smartphone, a tablet computer, a personal computer, or the like.

The sales server 20 is a computer that performs a process of selling an NFT from a seller to a user. The sales server 20 can provide, for example, an online shopping site related to NFT. In the present embodiment, it is assumed that the seller is a so-called business entity and the user does not sell it, but in the transaction system of the present embodiment, it is possible to apply the case where the user issues an NFT. Is.

The transaction server 40 is a computer that performs processing for distributing NFTs among users. For example, the transaction server 40 presents a list of NFTs that the user is trying to sell to another user, receives a purchase request for a specific NFT from the other user, and issues a transaction for changing the owner of the NFT. At the same time, a payment request can be sent to the payment server 30 so that payments can be made between users.

The payment server 30 is a computer operated by a payment company (a fund transfer company, a storage agency, a prepaid payment method issuer, a financial institution, a credit card company, etc.). The payment server 30 performs processing related to payment in the user's legal tender by a known method.

FIG. 2 is a diagram illustrating an outline of transactions in the present embodiment. In this embodiment, it is assumed that the non-fungible token (NFT) is sold (primary distribution) in the sales market and the NFT is traded (secondary distribution) in the trading market.

Seller X can sell NFTs in the sales market.

The user A operates the user terminal 10 and pays the seller X the purchase price of the NFT via the payment server 30 of the payment company T. The payment process via the payment server 30 may be performed by the user terminal 10 and the payment server 30 in direct communication, or may be performed via the sales server 20.

The sales server 20 can issue an NFT by the sales server 20 after confirming the payment from the user (that is, the payment is completed by the payment server 30). Issuance of NFT is performed in the blockchain network 50. The issued NFT is set as the owner of the user A who purchased the NFT, and the NFT is stored in the wallet of the user A.

In the trading market, NFTs can be traded between users. The transaction server 40 performs processing related to NFT transactions.

User A can transfer the NFT to another user B, and when the transfer is performed, a transaction is issued from the transaction server 40 to the blockchain network 50, the owner of the NFT is rewritten to user B, and the NFT is changed. The change history of is recorded in the blockchain network 50 as a blockchain.

The user B operates the user terminal 10 and pays the transfer price to the user A via the payment server 30 of the payment company T (which may be the same as or different from the payment server 30 in the transaction market). be able to. In the transaction market as well as in the sales market, the user terminal 10 may be configured to communicate via the transaction server 40 without directly communicating with the payment server 30.

In the present embodiment, when the NFT is transferred between users in the transaction market, the owner is once transferred to a reliable third party, the payment of consideration between the users is confirmed, and then the third party transfers the NFT to the purchaser. Relocate the owner. As a result, it is possible to avoid the situation where the ownership of the NFT is transferred but the payment is not made. In addition, the purchaser can make payment after confirming that the ownership of the NFT has left the seller.

In the present embodiment, it is assumed that the payment by the payment server 30 is the payment in the legal currency, but even if the payment is made by means such as points in place of the legal currency or in addition to the legal currency. Alternatively, payment may be made in virtual currency.

<Transaction server>
FIG. 3 is a diagram showing a hardware configuration example of the transaction server 40. The configuration shown in the figure is an example, and may have other configurations. The transaction server 40 includes a CPU 401, a memory 402, a storage device 403, a communication interface 404, an input device 405, and an output device 406. The storage device 403 stores various data and programs, such as a hard disk drive, a solid state drive, and a flash memory. The communication interface 404 is an interface for connecting to a communication network, for example, an adapter for connecting to Ethernet (registered trademark), a modem for connecting to a public telephone network, a wireless communication device for performing wireless communication, and the like. It is a USB (Universal Serial Bus) connector or RS232C connector for serial communication. The input device 405 is, for example, a keyboard, a mouse, a touch panel, a button, a microphone, or the like for inputting data. The output device 406 is, for example, a display, a printer, a speaker, or the like that outputs data. Each functional unit of the transaction server 40, which will be described later, is realized by the CPU 401 reading a program stored in the storage device 403 into the memory 402 and executing the program, and each storage unit of the transaction server 40 is the memory 402 and the storage device 403. Is realized as part of the storage area provided by.

FIG. 4 is a diagram showing an example of software configuration of the transaction server 40. The transaction server 40 includes a transfer instruction input unit 311, a first transfer processing unit 312, a payment request unit 313, a payment confirmation unit 314, and a second transfer processing unit 315.

The transfer instruction input unit 311 receives an instruction to transfer the NFT (hereinafter referred to as a transfer instruction). In the present embodiment, the transfer instruction input unit 311 can receive the transfer instruction from the user terminal 10. Further, the transfer instruction input unit 311 may accept the input of the transfer instruction from the input device, for example. Further, the transfer instruction input unit 311 may receive the transfer instruction from a communication device different from the user terminal 10. In the transfer instruction, a user of the current owner of the NFT who is trying to transfer the NFT (transfer source user) and a user to whom the NFT is transferred (transfer destination user) can be specified. In addition, the transfer instruction may include consideration for the transfer.

The first transfer processing unit 312 transfers the NFT from the transfer source user to a predetermined third party user (hereinafter referred to as an administrator user). In the present embodiment, the predetermined third party is assumed to be the operator of the transaction server 40, and the user of the predetermined third party is referred to as an administrator user, but the user is not limited to the operator of the transaction server 40. , Can be a third party trusted by the user. The first transfer processing unit 312 can issue a transaction for transferring the NFT from the transfer source user to the administrator user to the blockchain network 50, and transfer the NFT from the transfer source user's wallet to the administrator user's wallet. The first transfer processing unit 312 can perform the above transfer in response to the transfer instruction. The first transfer processing unit 312 can perform the above transfer before requesting payment of the transfer consideration described later.

The payment request unit 313 performs a process in which the transferee user pays the transfer consideration of the NFT. The payment request unit 313 can request the payment company to perform the payment processing (payment processing) by, for example, transmitting a payment request specifying the transfer destination user and the transfer consideration to the payment server 30.

The payment confirmation unit 314 confirms that the payment in the legal currency from the transferee user to the transferor user has been completed. In the present embodiment, it can be confirmed that the payment from the transfer destination user to the transfer source user is completed depending on whether or not the payment processing requested by the payment request unit 313 is successful. Further, the payment confirmation unit 314 may confirm the completion of payment by receiving, for example, a notification of payment completion from the payment server 30. Further, the payment confirmation unit 314 may access the payment server 30 to confirm whether or not the payment related to the payment from the transfer destination user to the transfer source user has been successful.

The second transfer processing unit 315 transfers the NFT from the administrator user to the transfer destination user after confirming the payment in the legal currency from the transfer destination user to the transfer source user. The second transfer processing unit 315 can issue a transaction for transferring the NFT from the administrator user to the transfer destination user to the blockchain network 50, and transfer the NFT from the administrator user's wallet to the transfer destination user's wallet.

<Operation>
FIG. 5 is a diagram illustrating the operation of the transaction system of the present embodiment. FIG. 6 is a diagram illustrating the transfer of NFTs in the trading system.

Before the transfer of the NFT, as shown in step 1 of FIG. 6, the NFT is stored in the wallet (A) of the user A who is the transfer source, and the user A is set as the owner of the NFT. The transfer consideration is managed in the financial institution account (B) of the user B who is the transferee.

When the transaction server 40 receives, for example, a transfer instruction from the user terminal 10 (S501), the transaction server 40 issues a transaction to transfer the NFT from the transfer source user to the administrator user (S502). The transaction server 40 confirms that the transfer of the NFT to the administrator user has been successful (S503).

At this point, as shown in step 2 of FIG. 6, the NFT moves from the wallet (A) of the user A to the wallet (Y) of the administrator user Y, and the owner of the NFT becomes the administrator user Y.

The transaction server 40 sends a payment request for the transfer amount to the payment server 30, for example, the payer is the transferee user and the payee is the transferor user, so that the transfer consideration from the transferee user to the transferor user. Payment processing (S504). For example, the transaction server 40 accesses the payment server 30 to acquire whether or not the payment is successful, and confirms the completion of the payment (S505).

At this point, as shown in step 3 of FIG. 6, the transfer consideration is deducted from the balance of the user B's account (B) and added to the balance of the user A's account (A).

After the payment is completed, the transaction server 40 issues a transaction to transfer the NFT from the administrator user to the transferee user (S506), and confirms that the transfer was successful (S507).

At this point, as shown in step 4 of FIG. 6, the NFT is transferred to the wallet (B) of the user B, and the owner is also set to the user B.

As described above, in the transaction system of the present embodiment, the NFT can be attributed to the administrator user until the completion of payment of the transfer consideration can be confirmed, and the NFT can be transferred to the transferee after the payment is completed. This ensures that both payments and NFT transfers are completed.

Although the present embodiment has been described above, the above embodiment is for facilitating the understanding of the present invention, and is not for limiting the interpretation of the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention also includes an equivalent thereof.

For example, in the present embodiment, the transaction server 40 sends a request to the payment server 30 to perform payment processing, but the payment processing is not limited to this, and the payment processing is performed by the transferee user, and the transaction server 40 performs the payment processing. All you have to do is confirm that the payment has been made. For example, it is possible to confirm the completion of payment by confirming the performance of transactions between accounts of a financial institution and confirming the transfer of the transfer amount from the account of the transferee user to the account of the transferor user. In this case, the transaction server 40 notifies the transfer destination user that the transfer of the NFT from the transfer source user to the administrator user is completed, and the transfer destination user performs payment processing after receiving the notification. be able to.

Further, in the present embodiment, the transfer consideration is paid directly from the transfer destination user to the transfer source user, but the transfer consideration is also managed by paying from the transfer destination user's account to the administrator user's account. The person user may pay the transferor user.

Further, in the present embodiment, the transfer of NFT is assumed, but the present invention is not limited to this, and may be applied to, for example, a case where the transaction server 40 manages the owner of digital contents in a database such as DBMS. It is possible. In this case as well, the payment may be made after the owner of the content is changed to the administrator, and the owner of the content may be changed from the administrator to the transferee user after confirming the completion of the payment.

10 User terminal 20 Sales server 30 Payment server 40 Transaction server 50 Blockchain network

Claims (6)

A transfer instruction input unit that accepts an instruction to transfer the digital asset from a first user who is the owner of the digital asset to a second user, and a transfer instruction input unit.
The first transfer processing unit that changes the owner of the digital asset to a third user,
A payment confirmation unit that confirms the completion of payment in legal currency from the second user to the first user,
A second transfer processing unit that changes the owner of the digital asset from the third user to the second user after confirming the completion of the payment.
A transaction support system characterized by being equipped with. A transfer instruction input unit that accepts an instruction to transfer the non-fangable token from a first user who is the owner of the non-fangable token to a second user, and a transfer instruction input unit.
A first transfer processing unit that transfers the non-fundable token from the wallet of the first user to the wallet of the third user.
A payment confirmation unit that confirms the completion of payment in legal currency from the second user to the first user,
After confirming the completion of the payment, the second transfer processing unit that transfers the non-fangible token from the wallet of the third user to the wallet of the second user, and the second transfer processing unit.
A transaction support system characterized by being equipped with. When the computer transfers the digital asset from the first user who is the owner of the digital asset to the second user,
Change the owner of the digital asset to a third user
After confirming the completion of payment in legal currency from the second user to the first user,
Changing the owner of the digital asset from the third user to the second user,
A transaction support method characterized by. When the non-fungible token is transferred from the first user who is the owner of the non-fangable token to the second user, the computer determines.
The non-fundable token is transferred from the wallet of the first user to the wallet of the third user.
After confirming the completion of payment in legal currency from the second user to the first user,
Transferring the non-fundable token from the wallet of the third user to the wallet of the second user.
A transaction support method characterized by. When transferring the digital asset from the first user who is the owner of the digital asset to the second user, the computer
The step of changing the owner of the digital asset to a third user,
A step of confirming the completion of payment in legal currency from the second user to the first user, and
After confirming the completion of the payment, the step of changing the owner of the digital asset from the third user to the second user, and
A program to execute. When transferring the non-fangable token from the first user who is the owner of the non-fangable token to the second user, the computer
The step of transferring the non-fundable token from the wallet of the first user to the wallet of the third user,
A step of confirming the completion of payment in legal currency from the second user to the first user, and
After confirming the completion of the payment, the step of transferring the non-fangable token from the wallet of the third user to the wallet of the second user, and
A program to execute.

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