Digital asset management system and control method thereof

Abstract

To provide a technology that enables businesses wishing to issue and distribute digital assets to easily manage such assets. [Solution] A digital asset management system includes a common area blockchain network that manages coins associated with cash currency, and a first additional area blockchain network that manages a first token associated with the coin, detects an instruction to transfer a second token associated with a digital asset, executes a transfer of the first token after detecting the instruction to transfer the second token, executes a transfer of the second token after detecting the instruction to transfer the second token, and transfers the coin associated with the first token within the common area blockchain network in response to the transfer of the first token in the first additional area blockchain network.

Description

[Technical field]

[0001] The present invention relates to a digital asset management system and a control method thereof. [Background technology]

[0002] Up until now, multiple businesses have operated electronic payment systems for multiple electronic currencies, virtual currencies, etc. For example, Patent Literature 1 discloses a system for validating transfers (transactions) of virtual currencies. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 6521421 DISCLOSURE OF THE ART Here, there has been an issue in that it is not convenient for businesses wishing to issue and distribute digital assets such as Non-Fungible Tokens (NFTs) and virtual currencies to manage their digital assets. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a technology that enables businesses wishing to issue and distribute digital assets to easily manage their digital assets. [Means for solving the problem]

[0005] The present invention relates to a digital asset management system, A common area blockchain network that operates coins associated with fiat currencies; A first additional domain blockchain network that operates a first token associated with the coin; A detection means for detecting an instruction to transfer a second token associated with the digital asset; a first execution means for executing the transfer of the first token after the detection means detects an instruction to transfer the second token; a second execution means for executing the transfer of the second token after the detection means detects an instruction to transfer the second token; A transfer means for transferring the coins associated with the first token in the common domain blockchain network in response to the transfer of the first token in the first additional domain blockchain network; The present invention is characterized by comprising: Effect of the Invention

[0006] According to the present invention, a technique can be provided that enables businesses wishing to issue and distribute digital assets to easily manage the digital assets. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing a digital asset management system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing the hardware configurations of the issuer device, operator device, user device, relay device, and transaction management device of FIG. [Diagram 3] FIG. 13 is a diagram showing an asset token issuing process. [Figure 4] FIG. 13 is a diagram showing an asset token transfer process. [Diagram 5] FIG. 13 is a diagram showing a modified example of the digital asset management system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims, and not all combinations of features described in the embodiments are essential to the invention. Two or more features among the multiple features described in the embodiments may be arbitrarily combined. In addition, the same reference numbers are used for the same or similar configurations, and duplicated descriptions are omitted.

[0009] The digital asset management system according to this embodiment will be described below. The digital asset management system 1 according to this embodiment includes an issuer domain 2, an issuer device 5, a common area network 10, a relay device 15, and an additional area network 20. In this embodiment, a first user device 3 and a second user device 4 (hereinafter, they may be referred to as user devices without distinction) are assumed to explain the management of digital assets, but the digital asset management system 1 can manage any number of users. Each user device is associated with a specific user account and has accounts in the issuer domain 2, the common area network 10, and the additional area network 20.

[0010] In addition, a predetermined node in the external network 50 can be connected to the additional area network 20, and in this embodiment, a transaction management device 55 of the external network 50 connects to the additional area network 20 and performs operations on digital assets, which will be described later. In addition, the user devices 3 and 4 also have accounts on the external network 50, and can execute transactions related to digital assets with other communication devices in the external network 50.

[0011] The issuer domain 2 is an area managed by an issuer device 5 used by a company that has a license to issue electronic currency, such as a bank. Each user has an account (for example, a bank account) in the issuer domain 2.

[0012] The common area network 10 is, for example, a distributed ledger network (common area blockchain network) such as a blockchain, and is composed of nodes (communication devices) that operate a distributed ledger system including an issuer device 5. The common area network 10 is used to execute operations such as the transfer of electronic currencies (coins) 101 to 104 linked to the currency operated by the issuer device 5. Here, coins 101 and 103 are coins (white coins) that are not associated with an additional area, and coins 102 and 104 are coins (colored coins) that are associated with the additional area network 20.

[0013] The additional area network 20 is a distributed ledger network (additional area blockchain network) such as a blockchain, and is composed of nodes that operate a distributed ledger system including an operator device 25 and a user device. The additional area network 20 is used to provide operations such as transfer of coin tokens 121 and 122 operated by the operator device 25 and asset tokens 131 and 132 paid by coin tokens. Although only one additional area network 20 is illustrated in FIG. 1, two or more additional area networks 20 may be connected to one common area network 10. In this case, a relay device 15 and an operator device 25 are arranged for each additional area network 20. The additional area network 20 is created for each individual use case according to the business needs of a company or the like.

[0014] The additional domain network 20 according to this embodiment manages a first token (coin token) 201 associated with a coin and a second token (asset token) 211 associated with a digital asset.

[0015] A coin token is a token that is associated one-to-one with a coin managed by the common area network 10. When a coin token is issued or transferred in the additional area network 20, the common area network 10 also corresponds to the issuance of a coin to an additional area and transfer of a colored coin.

[0016] An asset token is a digital asset such as a non-fungible token that is traded by a coin token. An asset token can be, for example, an environmental value token that proves that the user of a user device is a renewable energy. Alternatively, an asset token can be digital art that can be circulated as an NFT. In addition, an asset token can be a digital asset as commercial information that serves as a trigger for settlement, such as a digital certificate, specifically, a gift certificate, a coupon, points, a sightseeing tour pass, securities, a bond, or other claims, contract information, etc.

[0017] In this embodiment, the asset token and the coin token are both described as being issued and circulated by the additional domain network 20, but as described below, they may also be operated in separate blockchain networks.

[0018] While the authority to issue coin tokens lies with the operating company account, the authority to issue asset tokens may be held by one or more user accounts different from the operating company account. Also, the operating company account may not have the authority to issue asset tokens. This allows multiple types of asset tokens with different operating entities to be operated in one additional area network 20.

[0019] In response to the coin manipulation in the common area network 10, the relay device 15 transmits instructions regarding the coin manipulation to the operator device 25 in the additional area network 20, and causes the operator device 25 to execute the manipulation of the coin token corresponding to the manipulated coin. This allows the transfer of the coin token and the colored coin to be synchronized.

[0020] In addition, the additional area network 20 accepts an operation instruction of the asset token from any node of the external network 50. In this embodiment, the node that accepts the transfer instruction of the asset token is described as the operator device 25 of the additional area network 20, but is not limited thereto, and any node in the additional area network 20 can be set to accept the operation instruction.

[0021] The operator device 25 transmits instructions regarding the operation of the coin token or asset token to the additional area network 20. In this embodiment, the instructions regarding the operation of the coin token or asset token are described as being transmitted to the additional area network 20 by broadcast or anycast transmission, but the instructions regarding the operation may be transmitted by specifying a destination such as a transfer source node or a transfer destination node.

[0022] The external network 50 manages transactions of digital assets. Here, the management of transactions of digital assets includes, when a transaction including issuance, transfer, redemption, and exchange of a digital asset is established, storing information including at least information about the owner of the digital asset as information about the transaction, and instructing the additional area to operate the asset token.

[0023] In this embodiment, the operation of a coin, coin token, or asset token includes issuance, transfer, amortization, exchange, asset division, asset integration, inquiry, a function for setting whether or not division or transfer is possible, and an approval function for a token owner to give permission to other users to operate his / her token. For example, the operation of an asset token may include approval of the execution of issuance, amortization, exchange, division, and integration of an asset token by the external network 50 or the operator device 25 at the request of the asset token owner, or approval of the transfer of an asset token and the transfer of a coin token related thereto. In addition, the approval function for giving permission to operate an asset token may include approval of a confirmation operation of information such as the type and amount of asset tokens owned by a specific user by the external network 50 or the operator device 25.

[0024] The user device is a device of a user who receives a service in the additional area network 20. In this embodiment, the service in the additional area network 20 is described as the execution of a coin token operation in response to the operation of the asset token, and the execution of a coin operation in the common area network 10 associated with the execution of the coin token operation. In one example, the service in the additional area network 20 includes payment of a fee by an external service of the digital asset management system 1 by operating a coin token.

[0025] Next, the configurations of the user devices 3 and 4, the issuer device 5, the relay device 15, the operator device 25, and the transaction management device 55 (hereinafter, sometimes referred to as communication devices without distinction) will be described with reference to Fig. 2. The communication devices include a processor 201, a memory 202, a storage 203, a network interface (I / F) 204, and an input / output I / F 205.

[0026] The processor 201 is a control unit that controls the operation of the entire communication device. The processor 201 includes at least one of a central processing unit (CPU), a graphics processing unit (GPU), and a microcontroller that executes a program or an operating system (OS) stored in the storage 203. The memory 202 is composed of a dynamic random access memory (DRAM), a static random access memory (SRAM), etc. that are used as a working memory for the processor 201.

[0027] The storage 203 includes a storage medium such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive) that stores the program executed by the processor 201, the OS, and at least one of a data table and a setting value used by the program. The input / output I / F 205 is a user interface that includes an input device including at least one of a keyboard, a touch panel, and a microphone for receiving user operations, and an output device including at least one of a display, a speaker, and an LED. Note that in this specification, the user devices 3 and 4, the issuer device 5, the relay device 15, the operator device 25, and the transaction management device 55 will be described as having the same hardware configuration. In one example, at least one of the user devices 3 and 4, the issuer device 5, the relay device 15, the operator device 25, and the transaction management device 55 may not have the input / output I / F 205, and in this case, at least one of the user devices 3 and 4, the issuer device 5, the relay device 15, the operator device 25, and the transaction management device 55 that do not have the input / output I / F 205 may receive operation instructions or output operation results via the network I / F 204. At least some of the functions of the communication devices may be realized by cloud computing connected via a communication network.

[0028] (Coin token issuance process) In the following example, a process will be described in which the user device 4 instructs issuance of a coin token. It is assumed that the user device 4 has an account in which currency is deposited in the issuer area 2.

[0029] The user device 4 requests the issuer device 5 to issue coins. The issuer device 5 that receives the request issues white coins 103 by using currency as collateral, or the user device 4 has white coins 103 transferred from the issuer device 5. The user device 4 requests the issuer device 5 to issue colored coins associated with the additional area network 20 by specifying the amount of the white coins 103 owned as the upper limit. The issuer device 5 issues a transaction to the common area network 10 to convert the specified amount of white coins 103 into colored coins 104 associated with the additional area network 20. At this timing, the specified amount of white coins owned by the account of the user device 4 can only be used in the additional area network 20 (for example, the additional area of ​​energy trading).

[0030] When the relay device 15 detects a transaction to grant colored coins 104 to the user device 4 , it communicates the transaction to the additional area network 20 to issue a coin token corresponding to the quantity of colored coins 104 to the user device 4 .

[0031] In this way, by allocating (locking) the coins associated with the currency to each additional area network 20, the value of the issued coin token can be guaranteed. Also, at the moment of designation, a coin token that gives the impression that the currency has been issued is issued to the additional area network 20. This is not the actual substance of the electronic currency, but is like a proof of instruction that gives instructions to move it, and from the viewpoint of the operating company, it looks as if the electronic currency has been issued in the additional area network.

[0032] When a transaction is made in the additional area network 20, a coin token issued in the additional area network 20, which is in reality a "shadow of electronic currency," is moved around in the additional area network 20 to circulate value. The contents circulating around the additional area network 20 are synchronized by the relay device 15, which allows the operations of coins and coin tokens to be synchronized and linked in the additional area network 20 and the common area network 10. In other words, value is transferred in the form of actual electronic currency (coin) in the common area network 10 in synchronization with the circulation of the coin token in the additional area network 20.

[0033] Coins (electronic currency) issued in the common area are legally treated as deposits themselves, and represent deposit claims themselves, rather than assets that require regular deposits. Banks transfer actual electronic currency as part of their exchange operations.

[0034] In addition, in this system, a bank first issues a white coin that is not specified as to which additional domain it will be used in, and specifies that this is to be used in the additional domain network 20. This system has a function for returning a colored coin to a white coin, and performs an operation to cancel the specification of the additional domain network 20. By specifying that a white coin returned from a colored coin is to be used in a different additional domain network using this function, for example, electronic currency designated for electricity trading can be specified to be used as retail electronic currency, allowing the currency to be transferred without the need to go to the trouble of returning it to a bank deposit.

[0035] (Asset token issuance process) In this processing example, the user device 3 is associated with an account of an electricity supplier such as a power plant, and the user device 4 is associated with an account of an electricity consumer. In this processing example, the electricity supplier is assumed to operate an asset token in the additional area network 20, the asset token including digital certificate data that certifies that the electricity is an environmentally valuable source such as wind power or solar power that does not increase carbon dioxide.

[0036] A case where an asset token is issued will be described with reference to Fig. 3. An electricity supplier generates electricity having an environmental value as described above. In this case, the user device 3 reports data indicating the identifier of the user device 3 and the amount of electricity generated to the transaction management device 55 in the external network 50 (S301). In S301, the transaction management device 55 identifies a user account associated with the user device 3 in the additional area network 20.

[0037] The transaction management device 55 instructs the additional area network 20 to issue a digital asset according to the amount of power generation based on the data indicating the amount of power generation (S302). Here, the instruction transmitted in S302 indicates that the owner of the asset token is the user account associated with the user device 3. The instruction transmitted in S302 also indicates that the value or quantity of the asset token corresponds to the amount of power generation. As a result, a digital asset according to the amount of power generation is issued in the additional area network 20 to the account associated with the user device 3.

[0038] (Asset token transfer process) Next, a case will be described in which power is supplied from user device 3 to user device 4, and an asset token including digital certificate data is transferred as proof that power having environmental value has been supplied to user device 4.

[0039] FIG. 4 is a diagram showing the transfer of an asset token. In S401, power is supplied from the user device 3 to the user device 4, and the transaction management device 55 detects that power has been supplied. For example, the transaction management device 55 detects that power has been supplied when the user device 3 notifies the user device 3 that the user device 3 has supplied a predetermined amount of power, or when the user device 4 notifies the user device 3 that a predetermined amount of power has been supplied. Based on the notification, the transaction management device 55 identifies an identifier in the additional area network 20 of the user device 3 that is the source of the power supply, and an identifier in the additional area network 20 of the user device 4 that is the destination of the power supply. The transaction management device 55 records the supply of power in the storage as a transaction record, triggered by the detection that power has been supplied from the user device 3 to the user device 4.

[0040] Next, the transaction management device 55 instructs the additional area network 20 to transfer the asset token from the user device 3 to the user device 4 (S402). Here, the transaction management device 55 transmits the transfer instruction to the additional area network 20 via an application programming interface (API). In another example, a specific communication device, such as a gateway or an operator device 25, may be instructed to transmit the transfer instruction in the additional area network 20, in which case the communication device that receives the instruction transmits the transfer instruction to the additional area network 20. Blockchain transaction information is generated in the additional area network 20 by the transfer instruction.

[0041] When each node of the additional area network 20 detects an instruction to transfer the asset token, it executes verification and approval processing of the transaction information (S403). In the verification and approval processing of the transaction information, the owner of the coin token is changed from the account corresponding to the user device 4 to the account corresponding to the user device 3 in the additional area network 20, and the transfer processing is executed. If the account corresponding to the user device 4 does not have the amount of coin tokens instructed to be transferred, the transfer processing is not completed and ends, and the subsequent transfer of the asset token is not executed. If the account corresponding to the user device 4 has the amount of coin tokens instructed to be transferred, transaction information is generated, and the transfer of the coin token is executed by being verified and approved by the communication device in the additional area network 20. When the transfer of the coin token is completed, the asset token is transferred from the user device 3 to the user device 4 in the additional area network 20 (S404). In this way, by executing the coin token transfer and the subsequent asset token transfer in a single transaction in S402, the payment process in response to the instruction to transfer the asset token can be easily executed.

[0042] This prevents the transfer of asset tokens when the coin token balance is insufficient, making it possible to prevent transaction failures in which only coin tokens are transferred and no asset tokens are transferred. It also makes it unnecessary to perform cumbersome processes such as rewinding the asset token transfer when only the asset token is transferred and the coin token transfer fails.

[0043] When the relay device 15 detects the transfer of the coin token by the transaction information, it instructs the common area network 10 to transfer the owner of the coin linked to the transferred coin token from the account of the user device 4 to the account of the user device 3, just like the coin token (S405). The transfer of the coin is also realized by verifying and approving the transaction information generated by the relay device 15 from the communication device in the common area network 10.

[0044] In this embodiment, the relay device 15 instructs the transfer of colored coins according to the additional area network 20, that is, it specifies the type of coin to be transferred according to the type of the additional area network 20.

[0045] As described above, according to the present embodiment, the electronic currency associated with the cash currency can be easily operated in response to the transfer of the asset token. Also, from the user's perspective, the asset token can be purchased with the token associated with the electronic currency, and the payment methods for purchasing the asset token can be increased, thereby improving the convenience for the user.

[0046] (Variation 1) In the above description, an example has been described in which the transfer of asset tokens and coins is processed when the transfer of coin tokens is performed. However, conversely, the transfer of coin tokens and coins may be executed when the transfer of asset tokens is performed.

[0047] In this case, in S302, the transaction management device 55 instructs the operator device 25 to transfer the asset token, and the operator device 25, having received the instruction to transfer the asset token, instructs the additional area network 20 to transfer the asset token prior to the instruction to transfer the coin token. Then, when the operator device 25 detects the completion of the transfer of the asset token, it may instruct the additional area network 20 to transfer the coin token.

[0048] (Variation 2) In the above description, one common area network 10, one additional area network 20, and one external network 50 are associated with each other. However, a plurality of additional area networks 20 may be associated with each common area network 10, a plurality of external networks 50 may be associated with each additional area network 20, or a plurality of common area networks 10 may be associated with one external network 50. In addition, the coin token and the asset token may be operated in different blockchain networks.

[0049] 5, a case will be described in which two additional area networks 20A, 20B for managing coin tokens are associated with one additional area network 30 for managing asset tokens, and an external network 50 is associated with the additional area network 30. Note that the same reference numerals are used for configurations and functions similar to those in FIG. 1, and descriptions thereof will be omitted. Relay devices 15A, 15B have the same configuration as the relay device 15, and operation company devices 25A, 25B have the same configuration as the operation company device 25.

[0050] In the asset management system 1 shown in FIG. 5, two first additional area networks 20A and 20B are connected to one common area network 10, and one second additional area network 30 is connected to the first additional area networks 20A and 20B. The second additional area network 30 is a blockchain network for transferring asset tokens traded in an external network 50. The common area network 10 and the first additional area networks 20A and 20B are connected by first relay devices 15A and 15B, respectively, and the first additional area networks 20A and 20B and the second additional area network 30 are connected by second relay devices 35A and 35B, respectively. In the example of Figure 5, the common area network and the first additional area network and the first additional area network and the second additional area network are shown as being connected by different devices, but a single relay device may connect the common area network, the first additional area network, and the second additional area network.

[0051] Alternatively, two first additional area networks 20A and 20B may be connected to one common area network 10, and two second additional area networks 30 (30A and 30B) may be connected to each of the first additional area networks 20A and 20B. In this case, a relay device connecting the first additional area network 20A and the second additional area network 30A, a relay device connecting the first additional area network 20A and the second additional area network 30B, a relay device connecting the first additional area network 20B and the second additional area network 30A, and a relay device connecting the first additional area network 20B and the second additional area network 30B may be arranged. This allows each first additional area network 20 to support multiple second additional areas.

[0052] In this manner, by connecting multiple first additional area networks to one second additional area network, it is possible to switch which first additional area network to use when operating asset tokens traded via the second additional area network 30.

[0053] For example, when a transaction involving the transfer of a digital asset is established in the external network 50 (S501), the transaction management device 55 instructs the second additional area network 30 to transfer the asset token (S502). Here, in the transaction, the type of coin token is specified as the payment method accompanying the transfer of the asset token, and the transaction management device 55 includes information capable of identifying the type of coin token in the instruction of S502. This allows the relay devices 35A and 35B to transmit instructions for the transfer of the coin token accompanying the transfer of the asset token to the first additional area networks 20A and 20B to which they are respectively connected. In the example of FIG. 5, the relay device 35A transmits an instruction to transfer the coin token to the additional area network 20A (S503).

[0054] The relay device 15A that detects the instruction to transfer the coin token transmits an instruction to transfer the coin in the common area network 10 in association with the transfer of the coin token (S504), and the coin is transferred. This allows the settlement associated with the transfer of the digital asset to be performed. In addition, by switching the type of coin token used to transfer the digital asset, the user can select from multiple payment methods for the digital asset, improving the convenience of payment.

[0055] In this processing example, the transfer of coin tokens in response to an instruction to transfer asset tokens is illustrated as occurring only in one first additional area network. However, in response to an instruction to transfer one asset token, transfer of coin tokens may occur in multiple first additional area networks. In this case, the transaction management device 55 includes information specifying two or more types of coin tokens to be transferred and the amount of each of the multiple types of coin tokens to be transferred in the instruction to transfer the asset token.

[0056] This allows asset tokens to be combined with multiple coin tokens for settlement, improving convenience for users.

[0057] As described above, in this embodiment, in response to an instruction to transfer an asset token, the transfer of the coin token, the transfer of the asset token, and the transfer of the coin are automatically executed. As a result, in response to the transmission of an instruction to transfer a digital asset in the additional area network, settlement is completed with the coin associated with the cash currency, improving the convenience of management associated with the transfer of digital assets.

[0058] <Other embodiments> The instruction to transfer the asset token issued from the transaction management device 55 may include parameters other than the type and quantity of the asset token. For example, the instruction to transfer the asset token may include information specifying the timing to transfer the asset token. The information specifying the timing may be information specifying a date and time such as one day later or the end of the month, or may be information instructing the transfer to occur after the occurrence of a predetermined event, such as after the transfer of a coin token or after the transfer of coins. This allows the transfer of digital assets to be executed at a timing determined by the transaction, further improving the convenience of the digital asset management system.

[0059] It is also possible to realize a process in which a program that realizes one or more functions of each of the above-mentioned embodiments is supplied to a system or device via a network or a storage medium, and one or more processors in a computer of the system or device read and execute the program. [Explanation of symbols]

[0060] 1: Digital asset management system, 3, 4: User device, 5: Issuer device, 10: Common area network, 15: Relay device, 20: Additional area network, 25: Operator device, 50: External network, 55: Transaction management device

Claims

1. 1. A digital asset management system, comprising: A common area blockchain network that operates coins associated with fiat currencies; A first additional domain blockchain network that operates a first token associated with the coin; A detection means for detecting an instruction to transfer a second token associated with the digital asset; a first execution means for executing the transfer of the first token after the detection means detects an instruction to transfer the second token; a second execution means for executing the transfer of the second token after the detection means detects an instruction to transfer the second token; A transfer means for transferring the coins associated with the first token in the common domain blockchain network in response to the transfer of the first token in the first additional domain blockchain network; A digital asset management system comprising:

2. The digital asset management system according to claim 1 , wherein the second execution means executes the transfer of the second token when the second execution means detects completion of the transfer of the first token.

3. The digital asset management system according to claim 1 , wherein the first execution means executes the transfer of the first token when the first execution means detects completion of the transfer of the second token.

4. The digital asset management system of claim 1 , wherein the second token is operated on the first additional domain blockchain network.

5. The digital asset management system of claim 1, wherein the first additional domain blockchain network receives an instruction to issue the second token from an external device.

6. The digital asset management system of claim 1, wherein the second token is operated in a second additional domain blockchain network different from the first additional domain blockchain network.

7. The digital asset management system of claim 6, characterized in that when the first execution means detects an instruction to transfer the second token, it determines in which of a plurality of additional domain blockchain networks to execute the transfer of the first token based on the instruction.

8. The digital asset management system of claim 1 , wherein the second token includes digital certificate data.

9. The digital asset management system according to claim 1 , wherein the instruction to transfer the second token specifies a timing for transferring the second token.

10. A method for controlling a digital asset management system, comprising: The digital asset management system includes: A common area blockchain network that operates coins associated with fiat currencies; A first additional domain blockchain network that operates a first token associated with the coin; Equipped with The control method includes: Detecting an instruction to transfer a second token associated with the digital asset by a detection means of the digital asset management system; After detecting an instruction to transfer the second token, executing the transfer of the first token by a first execution means of the digital asset management system; After detecting an instruction to transfer the second token, executing the transfer of the second token by a second execution means of the digital asset management system; In response to the transfer of the first token in the first additional domain blockchain network, transferring the coins associated with the first token in the common domain blockchain network by a transfer means of the digital asset management system; A control method comprising:

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