JP2023066890A - Transaction system, transaction method, and program - Google Patents

Abstract

To support safe transactions.SOLUTION: A transaction support system includes: a transfer instruction input unit which receives an instruction to transfer a digital asset from a first user, who is an owner of the digital asset, to a second user; a first relocation processing unit which changes the owner of the digital asset to a third user; a payment confirmation unit which confirms completion of payment from the second user to the first user; and a second relocation processing unit which changes the owner of the digital asset, after confirming the completion of payment, from the third user to the second user.SELECTED DRAWING: Figure 1

Description

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

Commercial escrow services are known.

JP-A-2002-183483

When selling digital goods, goods arrive 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 technology capable of supporting safe transactions.

The main invention of the present invention for solving the above problems is a transaction support system, which includes 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 completion of payment from the second user to the first user; and completion of the payment. and a second transfer processing unit that changes the owner of the digital asset from the third user to the second user after confirming the.

Other problems disclosed by the present application and solutions thereof will be clarified by the section of the embodiment of the invention and the drawings.

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

It is a figure which shows the structural example of the transaction system which concerns on this embodiment. It is a figure explaining the outline|summary of the transaction in this embodiment. 3 is a diagram showing an example hardware configuration of a transaction server 40; FIG. 4 is a diagram showing a software configuration example of a transaction server 40; FIG. It is a figure explaining operation|movement of the transaction system of this embodiment. It is a figure explaining transfer of NFT in a trading system.

<Overview of the invention>
The contents of the embodiments of the present invention are listed and explained. The present invention has, for example, the following configurations.
[Item 1]
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 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 comprising:
[Item 2]
a transfer instruction input unit that receives an instruction to transfer the non-fungible token from a first user who is the owner of the non-fungible token to a second user;
a first transfer processing unit that transfers the non-fungible token from the first user's wallet to a third user's wallet;
a payment confirmation unit that confirms completion of payment from the second user to the first user;
a second transfer processing unit that transfers the non-fungible token from the third user's wallet to the second user's wallet after confirming completion of the payment;
A transaction support system comprising:
[Item 3]
When transferring a digital asset from a first user who is the owner of the digital asset to a second user, the computer:
change the owner of the digital asset to a third user;
confirming 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 transferring a non-fungible token from a first user who is the owner of the non-fungible token to a second user, the computer:
transferring the non-fungible token from the first user's wallet to a third user's wallet;
confirming completion of payment from the second user to the first user;
transferring the non-fungible token from the third user's wallet to the second user's wallet;
A transaction support method characterized by:
[Item 5]
When transferring a digital asset from a first user who is the owner of the digital asset to a second user, the computer:
changing the owner of the digital asset to a third user;
confirming completion of payment from said second user to said first user;
changing the owner of the digital asset from the third user to the second user after confirming completion of the payment;
program to run the
[Item 6]
When transferring a non-fungible token from a first user who is the owner of the non-fungible token to a second user, the computer:
transferring the non-fungible token from the first user's wallet to a third user's wallet;
confirming completion of payment from said second user to said first user;
transferring the non-fungible token from the third user's wallet to the second user's wallet after confirming completion of the payment;
program to run the

<Overview of the system>
FIG. 1 is a diagram showing a configuration example of a transaction system according to this embodiment. The trading system of this embodiment includes a trading server 40 . Transaction server 40 is communicably connected to user terminal 10, sales server 20, and settlement server 30 via a communication network. Transaction server 40 is also communicatively connected to 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. Distributed ledgers are managed by a so-called blockchain mechanism that makes falsification difficult. Note that the detailed explanation of the distributed ledger management mechanism by blockchain is omitted here as it adopts a general one. Blockchain network 50 can be constructed by, for example, Ethereum.

Tokens (Ethereum tokens) that can be issued by the blockchain network 50 such as Ethereum include fungible tokens and non-fungible tokens (Non-Fungible Tokens: NFT). NFTs are non-fungible tokens, unlike fungible tokens. NFTs can have unique values that distinguish them from other NFTs. For this reason, an NFT has a unique identifier (NFT-ID) to allow distinguishing it from other NFTs. NFT is, for example, a token issued according to the ERC (Ethereum Request for Comments) 721 standard. An NFT conforming to the ERC721 standard is also called an NFT-721 token. In this embodiment, as an example, assume that the NFT is an NFT-721 token. NFTs, like fungible tokens, can be traded on the blockchain network 50. NFT transaction history is recorded in the blockchain network 50 . The distributed ledger of the blockchain network 50 also records the owner of the NFT and its ownership history.

The transaction system according to the present embodiment is intended to ensure that payments are made reliably 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 smart phone, a tablet computer, a personal computer, or the like.

The sales server 20 is a computer that performs processing for selling NFTs from sellers to users. The sales server 20 can provide, for example, an online shopping site related to NFT. In this embodiment, it is assumed that the seller is a so-called business entity, and it is not assumed that the user sells, but the transaction system of this embodiment can be applied even when the user issues NFT is.

The transaction server 40 is a computer that performs processing for distributing NFTs among users. The transaction server 40, for example, presents a list of NFTs that the user intends to sell to other users, accepts purchase requests for specific NFTs from other users, and issues transactions to change the owner of the NFT. Along with this, a payment request can be sent to the payment server 30 for payment to be made between users.

The settlement server 30 is a computer operated by a settlement company (a fund transfer company, a receiving agency, an issuer of prepaid payment means, a financial institution, a credit card company, etc.). The settlement server 30 performs processing related to the user's legal currency settlement by a known method.

FIG. 2 is a diagram explaining an overview of transactions in this embodiment. In this embodiment, it is assumed that non-fungible tokens (NFTs) are sold (primary distribution) in the sales market and NFTs are traded (secondary distribution) in the trading market.

In the sales market, seller X can sell NFTs.

The user A operates the user terminal 10 and pays the NFT purchase consideration to the seller X via the settlement server 30 of the settlement company T. The payment processing via the settlement server 30 may be performed through direct communication between the user terminal 10 and the settlement server 30 or through the sales server 20 .

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

A trading market allows NFTs to be traded between users. The transaction server 40 performs processing related to NFT transactions.

User A can transfer an NFT to another user B, and when the transfer occurs, a transaction is issued from the transaction server 40 to the blockchain network 50, the owner of the NFT is transferred to user B, and the NFT 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 settlement server 30 of the settlement trader T (which may be the same as or different from the settlement server 30 in the trading market). be able to. In the trading market, as in the sales market, the user terminal 10 may communicate with the settlement server 30 via the trading server 40 instead of communicating directly with the settlement server 30 .

In this embodiment, when transferring NFT between users in the trading market, the owner is once transferred to a reliable third party, and after confirming the payment of consideration between users, the third party to the purchaser transfer owner. This makes it possible to avoid a situation in which payment is not made even though ownership of the NFT has been transferred. In addition, the purchaser can make the payment after confirming that the ownership of the NFT has left the seller.

In this embodiment, it is assumed that the payment by the settlement server 30 is made in legal currency. Alternatively, settlement may be made in virtual currency.

<Transaction server>
FIG. 3 is a diagram showing a hardware configuration example of the transaction server 40. As shown in FIG. Note that the illustrated configuration is an example, and other configurations may be employed. Transaction server 40 includes CPU 401 , memory 402 , storage device 403 , communication interface 404 , input device 405 and output device 406 . A storage device 403 is, for example, a hard disk drive, a solid state drive, a flash memory, or the like, which stores various data and programs. The communication interface 404 is an interface for connecting to a communication network. Examples include a USB (Universal Serial Bus) connector and an RS232C connector for serial communication. The input device 405 is, for example, a keyboard, mouse, touch panel, button, microphone, etc. for inputting data. The output device 406 is, for example, a display, printer, speaker, or the like that outputs data. Each functional unit of transaction server 40, which will be described later, is implemented by CPU 401 reading a program stored in storage device 403 into memory 402 and executing it. is implemented as part of the storage provided by

FIG. 4 is a diagram showing a software configuration example of the transaction server 40. As shown in FIG. The transaction server 40 includes a transfer instruction input unit 311 , a first transfer processing unit 312 , a payment requesting 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 transfer instruction). In this embodiment, the transfer instruction input unit 311 can receive a transfer instruction from the user terminal 10 . Also, the transfer instruction input unit 311 may receive input of a transfer instruction from an input device, for example. Also, 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, the user who is the current owner of the NFT to which the NFT is to be transferred (transfer source user) and the user to whom the NFT is to be transferred (transfer destination user) can be specified. In addition, the transfer instruction can 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 this embodiment, the predetermined third party is the operator of the transaction server 40, and the user of the predetermined third party is called the administrator user. , a third party trusted by the user. The first transfer processing unit 312 can issue a transaction to transfer 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 transfer in accordance with the transfer instruction. It should be noted that the first transfer processing unit 312 can perform the above-described transfer before requesting payment of the transfer consideration, which will be described later.

The payment request unit 313 performs processing for the transfer destination user to pay the NFT transfer price. The payment requesting unit 313 can request the payment processing (settlement processing) to the settlement company by transmitting, for example, a settlement request designating the transfer destination user and the transfer price to the settlement server 30 .

The payment confirmation unit 314 confirms that payment in legal currency from the transferee user to the transferor user has been completed. In this embodiment, it is possible to confirm that the payment from the transferee user to the transferor user has been completed based on whether or not the payment processing requested by the payment requesting unit 313 has succeeded. Further, the payment confirmation unit 314 may confirm the completion of payment by receiving a notification of completion of payment from the settlement server 30, for example. Also, the payment confirmation unit 314 may access the payment server 30 and confirm whether or not the payment from the transferee user to the transferor user has been successfully completed.

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

<Action>
FIG. 5 is a diagram for explaining the operation of the transaction system of this embodiment. FIG. 6 is a diagram explaining 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 user A who is the transfer source, and user A is set as the owner of the NFT. The consideration for transfer is managed in the financial institution account (B) of user B who is the transferee.

For example, when the transaction server 40 receives a transfer instruction from the user terminal 10 (S501), it issues a transaction to transfer the NFT from the transfer source user to the administrator user (S502). The transaction server 40 confirms that the NFT has been successfully transferred to the administrator user (S503).

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

For example, the transaction server 40 sends a payment request for the transfer amount to the payment server 30, with the transfer destination user as the payer and the transfer source user as the payee. payment processing is performed (S504). The transaction server 40, for example, accesses the settlement server 30 to obtain whether or not the settlement was successful, and confirms the completion of the payment (S505).

At this point, as shown in step 3 of FIG. 6, the transfer consideration is subtracted from the balance of user B's account (B) and added to the balance of 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, the NFT is transferred to user B's wallet (B) and the owner is also set to user B, as shown in step 4 of FIG.

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

Although the present embodiment has been described above, the above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit and interpret the present invention. The present invention can be modified and improved without departing from its spirit, and the present invention also includes equivalents thereof.

For example, in the present embodiment, the transaction server 40 transmits a request to the settlement server 30 to perform payment processing. Confirm that the payment has been made. For example, it is possible to confirm the completion of payment by confirming the performance of inter-account transactions 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 transferee user that the transfer of the NFT from the transferor user to the administrator user has been completed, and the transferee user performs payment processing after receiving the notification. be able to.

In addition, in the present embodiment, the payment of the transfer consideration is made directly from the transferee user to the transferor user. Alternatively, the transferor user may pay the transfer source user.

Also, in the present embodiment, it is assumed that the NFT is transferred, but it is not limited to this. It is possible. Even in this case, the payment is made after the owner of the contents is changed to the manager, and after confirming the completion of the payment, the owner of the contents is changed from the manager to the transfer destination user.

10 User Terminal 20 Sales Server 30 Settlement Server 40 Transaction Server 50 Blockchain Network

Claims (6)

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 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 comprising: a transfer instruction input unit that receives an instruction to transfer the non-fungible token from a first user who is the owner of the non-fungible token to a second user;
a first transfer processing unit that transfers the non-fungible token from the first user's wallet to a third user's wallet;
a payment confirmation unit that confirms completion of payment from the second user to the first user;
a second transfer processing unit that transfers the non-fungible token from the third user's wallet to the second user's wallet after confirming completion of the payment;
A transaction support system comprising: When transferring a digital asset from a first user who is the owner of the digital asset to a second user, the computer:
change the owner of the digital asset to a third user;
confirming 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: When transferring a non-fungible token from a first user who is the owner of the non-fungible token to a second user, the computer:
transferring the non-fungible token from the first user's wallet to a third user's wallet;
confirming completion of payment from the second user to the first user;
transferring the non-fungible token from the third user's wallet to the second user's wallet;
A transaction support method characterized by: When transferring a digital asset from a first user who is the owner of the digital asset to a second user, the computer:
changing the owner of the digital asset to a third user;
confirming completion of payment from said second user to said first user;
changing the owner of the digital asset from the third user to the second user after confirming completion of the payment;
program to run the When transferring a non-fungible token from a first user who is the owner of the non-fungible token to a second user, the computer:
transferring the non-fungible token from the first user's wallet to a third user's wallet;
confirming completion of payment from said second user to said first user;
transferring the non-fungible token from the third user's wallet to the second user's wallet after confirming completion of the payment;
program to run the

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