KR102385982B1 - e-WALLET, SERVER PERFORMING THE e-WALLET, AND ATOMIC SWAPPING METHOD OF DIFFERENT BLOCKCHAIN TOKENS USING THE SERVER - Google Patents

Abstract

A method of operating a server for token exchange is disclosed. The method of operating a server for the token exchange includes: receiving, by the server, first token remittance information for remittance of a first token used in a first block chain network from a first computing device; Receiving second token remittance information for remittance of a second token used in a chain network from a second computing device, wherein the server transmits the first token remittance information and the second computing device from the first computing device determining whether an exchange agreement between the first token and the second token agrees with each other based on the second token remittance information transmitted from a device; and the server publishes the first token remittance information to the first blockchain network and the server publishes the second token remittance information to the second blockchain network instead of the second computing device. .

Description

Electronic wallet, server executing it, and atomic exchange method of block chain tokens using the server

The present invention relates to an electronic wallet, and more particularly, to a server executing the electronic wallet, and a method for atomic exchange of different blockchain tokens using the server.

Blockchain stores small-scale data called blocks in a chain-type, link-based distributed data storage environment created based on the peer-to-peer (P2P) method so that no one can arbitrarily modify it, and anyone can change the result of the change. It is a distributed computing-based ledger management technology that can view

A blockchain (or blockchain system) includes an irreversible database system that cannot be forged and a blockchain address that users create using public key encryption technology.

Transaction information recorded in the blockchain includes remittance information transmitted from one blockchain address to another blockchain address. In order to ensure the anonymity of the transaction, the blockchain records only the transaction details between the blockchain addresses including numbers, and the information about the owner of each of the blockchain addresses is not recorded in the blockchain.

Laid-Open Patent Publication: Publication No. 10-2018-0114915 (published on October 19, 2018) Laid-Open Patent Publication: Publication No. 10-2019-0110377 (published on September 30, 2019)

Conventionally, if one of two users is in the first blockchain network and the other of the two users is in the second blockchain network, since the two users are not in the same blockchain network, the two users Each of the users of ' could not safely exchange their tokens with the other's tokens.

The present invention has been devised to solve this problem, and even if the two users are in different blockchain networks, each of the two users can safely exchange their own token and the other's token, the method An object of the present invention is to provide an electronic wallet that can be performed, a server executing the electronic wallet, and a method of providing a token exchange service using the server.

A method of operating a server relaying token exchange according to embodiments of the present invention includes receiving first token remittance information for remittance of a first token used in a first block chain network from a first computing device; Receiving second token remittance information for remittance of a second token used in a block chain network from a second computing device, and based on the first token remittance information and the second token remittance information, determining whether the exchange agreement of the second token matches; if it is determined that the exchange agreement agrees, the first token remittance information is transmitted to the second computing device, and the second token remittance information is transmitted to the first computing device transmitting to the device.

A program is recorded in a computer-readable medium to execute a method of operation of a server relaying token exchange to a computer.

The electronic wallet stored in the computer-readable medium according to the embodiments of the present invention receives the first token remittance information for the remittance of the first token used in the first block chain network from the first computing device, and the second block Receive second token remittance information for remittance of a second token used in a chain network from a second computing device, and based on the first token remittance information and the second token remittance information, the first token and the second It is determined whether token exchange agreement is consistent, and if it is determined that the exchange agreement is consistent, the first token remittance information is transmitted to the second computing device, and the second token remittance information is transmitted to the first computing device.

A server according to embodiments of the present invention includes a processor and a computer-readable medium recording a program, and the medium stores a program for performing an operating method of a server relaying token exchange.

In the method of providing a token exchange relay service using a relay server according to embodiments of the present invention, the relay server transmits first token remittance information for remittance of a first token used in a first block chain network to a first computing device. Receiving, by the relay server, second token remittance information for remittance of a second token used in a second block chain network from a second computing device, wherein the relay server remits the first token determining whether an exchange agreement between the first token and the second token is consistent with each other based on the information and the second token remittance information; and transmitting to the second computing device and transmitting the second token remittance information to the first computing device.

A method of operating a server for token exchange according to embodiments of the present invention includes: receiving, by the server, first token remittance information for remittance of a first token used in a first block chain network from a first computing device; receiving, by the server, second token remittance information for remittance of a second token used in a second block chain network different from the first block chain network from a second computing device; determining whether an exchange agreement between the first token and the second token is consistent with the first token remittance information transmitted from and based on the second token remittance information transmitted from the second computing device; is determined to match, the server publishes the first token remittance information to the first block chain network instead of the first computing device, and the server sends the second token remittance information to the first block chain network instead of the second computing device. and publishing to a second blockchain network.

A program may be recorded in a computer-readable storage medium to execute the method of operation of the server for exchanging tokens in the computer.

The electronic wallet executed by the processor of the server communicating with the first computing device and the second computing device according to embodiments of the present invention and stored in a computer-readable storage medium is the electronic wallet executed by the processor of the server. Receives first token remittance information for remittance of the first token used in the first blockchain network from the first computing device, and the electronic wallet executed by the processor of the server is different from the first blockchain network Receives second token remittance information for remittance of a second token used in a second block chain network from the second computing device, and the electronic wallet executed by the processor of the server is transmitted from the first computing device Based on the first token remittance information and the second token remittance information transmitted from the second computing device, it is checked whether an exchange agreement between the first token and the second token is consistent, and if it is confirmed that the exchange agreement is consistent The electronic wallet executed by the processor of the server instead of the first computing device publishes the first token remittance information to the first blockchain network, and is executed by the processor of the server instead of the second computing device The electronic wallet that becomes the publishes the second token remittance information to the second block chain network.

A server according to embodiments of the present invention includes a processor and a computer-readable storage medium recording a program, and the storage medium stores a program for performing a method of operating a server for token exchange.

A method of providing a token exchange service using a server that communicates with a first computing device and a second computing device according to embodiments of the present invention is a method in which the server provides a first token for remittance of a first token used in a first blockchain network. receiving, by the server, second token remittance information for remittance of a second token used in a second block chain network different from the first block chain network, from the first computing device; 2 Receiving from a computing device, the server receives the first token and the remittance information based on the first token remittance information transmitted from the first computing device and the first token remittance information transmitted from the second computing device judging whether the exchange agreement of the second token coincides, and if it is determined that the exchange agreement agrees, the server publishes the first token remittance information to the first blockchain network instead of the first computing device, and publishing, by the server, the second token remittance information to the second blockchain network instead of the second computing device.

A method of operating a server relaying token exchange according to embodiments of the present invention comprises the steps of: receiving a first message including first token remitter information, first token recipient information, and a first token from a first computing device; It is monitored whether the first remittance information of the first token remitter, the first identification information of the server, and the first remittance information including the first token are published on the first blockchain network, and as a monitoring result, the first blockchain network reading the first remittance information from and receiving a first confirmation signal generated by the second computing device based on a user's input.

A program is recorded in a computer-readable medium to execute a method of operation of a server relaying token exchange to a computer.

The electronic wallet stored in a computer-readable medium according to embodiments of the present invention includes instructions for causing a computing device to perform the following steps, wherein the steps include first token sender information, first token payee information, and Receiving a first message including a first token from a first computing device, wherein the first token remitter information, the first identification information of the server, and the first remittance information including the first token in a first block monitoring whether it is published on a chain network, reading the first remittance information from the first block chain network as a monitoring result, and based on the first token payee information included in the first message, the first transmitting a message to a second computing device; and receiving a first acknowledgment signal generated by the second computing device based on an input of a second user confirming the first message.

A server according to embodiments of the present invention includes a processor and a computer-readable medium recording a program, and the medium stores a program for performing an operating method of a server relaying token exchange.

In a method of providing a token exchange relay service using a relay server according to embodiments of the present invention, the relay server transmits a first message including first token remitter information, first token recipient information, and a first token to a first Receiving from a computing device, and whether the relay server publishes the first token remittance information, the first identification information of the relay server, and the first remittance information including the first token to a first blockchain network monitoring and reading the first remittance information from the first block chain network as a monitoring result, and the relay server sends the first message based on the first token recipient information included in the first message. transmitting to a second computing device; and receiving, by the relay server, a first confirmation signal generated by the second computing device based on an input of a second user who has confirmed the first message.

Conventionally, when one of two users is in the first blockchain network and the other is in the second blockchain network, the two users are not in the same blockchain network, so each of the two users is You could not safely exchange your tokens for the tokens of the other party.

However, when using the electronic wallet according to the present invention, the server executing the electronic wallet, and the atomic exchange method of blockchain tokens using the server, each user uses the electronic wallet and the server to obtain their tokens. It has the effect of being able to safely exchange tokens with the other party's tokens. That is, the server and the atomic exchange method are effective in ensuring the simultaneous exchange of tokens to be exchanged.

In order to more fully understand the drawings recited in the Detailed Description, a detailed description of each drawing is provided.
1 is a block diagram of a block chain system according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining embodiments of operations of electronic wallets included in the block chain system shown in FIG. 1 .
FIG. 3 is a diagram for explaining embodiments of operations of electronic wallets included in the block chain system shown in FIG. 1 .
FIG. 4 is a diagram for explaining an embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 .
FIG. 5 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 .
FIG. 6 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 .
FIG. 7 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 .
FIG. 8 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 .
FIG. 9 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 .
FIG. 10 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 .

An electronic wallet or e-wallet, also known as a digital wallet, smart wallet, crypto wallet, or blockchain wallet, etc., is an individual (or individuals) enable electronic transactions (eg, buy, sell, send, swap, and/or track a token); means any permitted electronic device, online service, or software (or program). Atomic swap of tokens using a server may mean ensuring secure exchange (or simultaneous exchange) of the tokens through the server.

Each of the electronic wallets 220 , 320 , and 620 means an application executed by each processor 210 , 310 , and 610 of each computing device 200 , 300 , and 600 , and the application is an application. means, but not limited to, software, computer program, software, or app.

The first computing device 200 includes a first input device (eg, keyboard, touchpad, or computer mouse, etc.; 201 ), a first output device 203 , such as a monitor or display device, and a first processor 210 . ), and a first transceiver 230 , wherein the second computing device 300 includes a second input device (eg, keyboard, touchpad, or computer mouse, etc.; 301 ), such as a monitor or display device. A second output device 303 , a second processor 310 , and a second transceiver 330 are included, and the third computing device 600 includes a processor 610 and a transceiver 630 .

Each computing device 200 and 300 may be a desktop computer, a laptop computer, an Internet mobile device (IMD), a smart phone, or an Internet of Things (IoT) device, etc. It is not limited. Each e-wallet 220 and 320 is stored in a storage medium (eg, a memory device) of each computing device 200 and 300 and executed by a respective processor 210 and 310 that has access to the storage medium. do.

The computing device 600 may be a server (eg, a relay server for exchanging tokens), and the electronic wallet 620 may be a storage medium (eg, a memory device, a hard disk) accessible by the server 600 . It is stored on a drive, solid state drive (SSD) or database) and executed by the processor 610 .

Each of the electronic wallets 220 , 320 , and 620 is an application stored in a readable storage medium, and the application executes codes or instructions for causing the computing device to perform corresponding steps among the steps shown in FIGS. 4 to 10 . include Each of the electronic wallets 220, 320, and 620 is coupled with hardware (eg, a computing device or a processor installed in the computing device) to enable secure exchange of tokens used in different blockchain networks 400 and 500. An application stored on a readable storage medium for

Here, each of the electronic wallets 220 , 320 , and 620 refers to an application (or program) that performs a function similar to a banking application that provides financial services.

The first address of the first user means unique information for identifying the first user in the first blockchain network 400, and means information similar to the first bank account information of the first user do. In addition, the second address of the first user means unique information for identifying the first user in the second block chain network 500, and means information similar to the second bank account information of the first user .

The first address of the second user means unique information for identifying the second user in the first blockchain network 400, and means information similar to the first bank account information of the second user. In addition, the second address of the second user means unique information for identifying the second user in the second blockchain network 500, and means information similar to the second bank account information of the second user .

When the first user transfers a token (or blockchain token) to the second user through the first blockchain network 400 and/or the relay server 600, the first user's first address is the sender's address ( or 'remittee information'), and the first address of the second user corresponds to a payee address (also referred to as 'recipient information'). Conversely, when the second user transfers a token to the first user through the first blockchain network 400 and/or the relay server 600, the first address of the second user corresponds to the sender address and The first address of one user corresponds to the addressee address.

In addition, when the second user remits a token (or block chain token) to the first user through the second block chain network 500 and/or the relay server 600, the second address of the second user is the remitter The address corresponds to the address and the second address of the first user corresponds to the payee address. Conversely, when the first user remits the token to the second user through the second blockchain network 500 and/or the relay server 600, the second address of the first user corresponds to the remitter address and 2 The user's second address corresponds to the payee address.

Token refers to, but is not limited to, electronic money, digital currency, cryptocurrency, virtual currency, or digital asset.

1 to 10, the electronic signature is always performed by the subject (eg, the remitter) who transmits the token, and the information digitally signed by the remitter can be obtained by any one of the remitter, the relay server 600, and the recipient. can publish.

In this specification, when an electronic wallet exchanges information with another electronic wallet, the first computing device (or first transmitter/receiver) executing the certain electronic wallet executes the other electronic wallet through a communication network ( or a second transmitter/receiver) and exchanging the information means. Here, the communication network is a communication network between the first computing device 200 and the relay server 600 , the communication network between the second computing device 300 and the relay server 600 , and the computing device 200 or 300 and a blockchain network Includes networks between (400 or 500).

1 is a block diagram of a block chain system according to an embodiment of the present invention.

Referring to Fig. 1, the block chain system (this is also referred to as a 'blockchain remittance system' or 'distributed ledger processing system' 100) is a first computing device 200, a second computing device 300, and a first block. It includes a chain network 400 , a second blockchain network 500 , and a relay server 600 . Each block chain network 400 and 500 may mean a peer-to-peer (P2P) network, and may mean different block chain networks or heterogeneous block chain networks.

Each block chain network 400 and 500 is a network including a storage device or storage space for receiving and storing information published by a device or electronic wallet for publishing, and according to embodiments, each block chain The networks 400 and 500 may use a method of generating a block or a method of not generating the block, but in the present specification, a block chain network 400 including at least one block chain node 410 or 510 or 500) is shown and described, but the technical spirit of the invention described herein is not limited to whether or not blocks are generated.

Conventionally, for example, one user out of two users is in the first blockchain network (eg, the Bitcoin network; 400 ) (or using the first blockchain network 400 ) When another user among the two users is in the second blockchain network (eg, Ethereum network; 500) (or when using the second blockchain network 500), the two users Since the users are not on the same blockchain network (or not using the same blockchain network), each of the two users could not safely exchange their tokens for the other's tokens.

However, each of the electronic wallets 220 and 320 are installed in each of the computing devices 200 and 300, and the electronic wallet 620 is installed in the relay server 600 electrically connected to the computing devices 200 and 300. At this time, each user can securely exchange his/her token with the other's token using the electronic wallets 220 , 320 , and/or 620 .

Each processor 210 , 310 , and 610 of each computing device 200 , 300 , and 600 executes respective electronic wallets 220 , 320 , and 620 stored in each medium. It is assumed that the structures and functions of each of the electronic wallets 220 and 320 are identical to each other.

The first electronic wallet 220 includes a first electronic wallet_A 221 , a first electronic wallet_B 223 , a first control module (or first controller; 225 ), and a first communication module (or first software transceiver; 227). Each of the components 221 , 223 , 225 , and 227 means a functional combination of software capable of performing functions or steps (or operations) to be described herein.

The first electronic wallet_A 221 is an electronic wallet that performs remittance and receipt of tokens using the first blockchain network 400 and/or the relay server 600, and the first electronic wallet_B 223 is an electronic wallet that performs remittance and receipt of tokens using the second blockchain network 500 and/or the relay server 600, and the first control module 225 includes the first electronic wallet_A 221, The first electronic wallet_B 223 and the first communication module 227 are controlled, and the first communication module 227 uses the first transmitter/receiver 230 to the first block chain network 400 and the second It communicates with the blockchain network 500 , and/or the relay server 600 . The first electronic wallet_A 221 and the first electronic wallet_B 223 may exchange necessary signals or information through the first control module 225 .

The second electronic wallet 320 includes a second electronic wallet_A 321 , a second electronic wallet_B 323 , a second control module (or second controller; 325 ), and a second communication module (or second software transceiver; 327). Each component 321 , 323 , 325 , and 327 refers to a functional combination of software capable of performing functions or steps to be described herein.

The second electronic wallet_A (321) is an electronic wallet that performs remittance and receipt of tokens using the first block chain network 400 and/or the relay server 600, and the second electronic wallet_B (323) is an electronic wallet that performs remittance and receipt of tokens using the second blockchain network 500 and/or the relay server 600, and the second control module 325 includes the second electronic wallet_A 321, The second electronic wallet_B 323 and the second communication module 327 are controlled, and the second communication module 327 uses the second transceiver 330 to the first block chain network 400 and the second It communicates with the blockchain network 500 , and/or the relay server 600 . The second electronic wallet_A 321 and the second electronic wallet_B 323 may exchange necessary signals or information through the second control module 325 .

The third electronic wallet 620 executed in the relay server 600 includes a third electronic wallet_A 621, a third electronic wallet_B 623, a third control module (or third controller; 625), and and a third communication module (or a third software transceiver; 627 ). Each component 621 , 623 , 625 , and 627 refers to a functional combination of software capable of performing functions or steps to be described herein.

An operation of each of the components 621 , 623 , 625 , and 627 will be described in detail with reference to FIGS. 4 to 10 . It is assumed that the functions and structures of the respective electronic wallets 221 and 321 are the same, and the functions and structures of each of the electronic wallets 223 and 323 are the same.

For example, each e-wallet_A (221, 321, or 621) has the function of the first e-wallet_A 221, the second e-wallet_A 321, and/or the third e-wallet_A ( 621) can perform all of the functions. Each e-wallet_B 223 , 323 , or 623 has the function of the first e-wallet_B 223 , the second e-wallet_B 323 , and/or the function of the third e-wallet_B 623 . can all be done.

The first blockchain network 400 includes at least one blockchain node 410, and the blockchain node 410 creates and manages blocks CB and NB. The second blockchain network 500 includes at least one blockchain node 510, and the blockchain node 510 creates and manages blocks CB and NB.

Although, in FIG. 1 and FIGS. 4 to 10, each block chain network 400 and 500 is illustrated as including one block chain node 410 and 510, this is for convenience of explanation and each block chain The nodes 410 and 510 collectively refer to one or a plurality of blockchain nodes.

The first blockchain network 400 provides blockchain ledger and smart contract (chaincode) services to applications (eg, 221, 321, and/or 621). It is a technical infrastructure. The first blockchain network 400 refers to a network capable of processing a blockchain ledger or distributed ledger.

The second blockchain network 500 is a technology infrastructure that provides blockchain ledger and smart contract (or chaincode) services to applications (eg, 223 , 323 , and/or 623 ). The second blockchain network 500 refers to a network capable of processing a blockchain ledger or distributed ledger.

FIG. 2 is a diagram for explaining embodiments of operations of electronic wallets included in the block chain system shown in FIG. 1 .

In FIG. 2 , for convenience of explanation, the first user of the first computing device 200 sends the first token (or 'first token amount', TA1) to the second user of the second computing device 300 . It is assumed that remittance is performed, and the second user remits a second token (also referred to as a 'second token amount', TA2) to the first user. Accordingly, the first user and the second user simultaneously and in parallel through the relay server 600, the tokens TA1 and TA2 used in heterogeneous blockchain networks (or blockchain systems; 400 and 500). , or can be safely exchanged with an allowed time difference. That is, the relay server 600 performs a function of ensuring the exchange of tokens TA1 and TA2 to be described with reference to FIGS. 4 to 10 .

The first token (also referred to as ‘first blockchain token’; TA1) means a token used (or defined) in the first blockchain network 400, and the second token (or ‘second blockchain token’) '; TA2) refers to a token used (or defined) in the second blockchain network 500. Accordingly, the first token TA1 of the first user and the second token TA2 of the second user are obtained at a constant ratio (or between users) through the steps (or operations) described with reference to FIGS. 4 to 10 . can be safely exchanged at the exchange rate agreed in advance on

The first user is the sender of the first token TA1 and the recipient of the second token TA2 exchanged for the first token TA1, and the second user is the sender of the second token TA2 and the second token TA2. ) is the recipient of the first token (TA1) exchanged for

2 and 3 , the first electronic wallet_A 221 is a first token remittance electronic wallet, the second electronic wallet_A 321 is a first token receiving electronic wallet, and a second electronic wallet Wallet_B 323 is a second token remittance electronic wallet, and first electronic wallet_B 223 is a second token receiving electronic wallet.

The first token remittance electronic wallet 221 included in the first electronic wallet 220 of the first user is a pair (<PrK1) of a first private key (PrK1) and a first public key (PuK1). , PuK1>), and from the first public key (PuK1) (or by applying a hash function to the first public key (PuK1)) generate the first address (U1A1) of the first user (or derived) (S110-1).

The first user uses the first input device 201 of the first computing device 200 to the first address (U2A1) of the second user and a first token corresponding to the remittance amount (also referred to as a 'first token amount') When TA1) is input to the first token remittance electronic wallet 221, the first token remittance electronic wallet 221 is the first address (U1A1) of the first user (ie, the remitter of the first token TA1). , a first transaction (TS1[U1A1, U2A1, TA1]) including the first address U2A1 of the second user (that is, the payee of the first token TA1), and the first token TA1 and digitally sign the first transaction TS1 with the first private key PrK1 to generate the digitally signed first transaction STS1 (S120-1).

The second token remittance electronic wallet 323 included in the second user's second electronic wallet 320 generates a pair (<PrK2, PuK2>) of a second private key (PrK2) and a second public key (PuK2). and generate (or derive) the second address U2A2 of the second user from the second public key PuK2 (or by applying a hash function to the second public key PuK2) (S110-2).

The second user uses the second input device 301 of the second computing device 300 to the second address (U1A2) of the first user and a second token (or second token amount; TA2) corresponding to the remittance amount is input to the second token remittance electronic wallet 323, the second token remittance electronic wallet 323 is the second address (U2A2) of the second user (that is, the remitter of the second token (TA2)), the first user A second transaction (TS2[U2A2, U1A2, TA2]) including the second address (U1A2) of (that is, the payee of the second token (TA2)) and the second token (TA2) is generated, and the second individual Digitally sign the second transaction TS2 with the key PrK2 to generate the digitally signed second transaction STS2 (S120-2).

The first token remittance electronic wallet 221 generates the first token remittance information RI1 (S130-1). The first token remittance information RI1 includes the first address of the first user (U1A1), the first address of the second user (U2A1), the first token (TA1), the digitally signed first transaction (STS1), and the second Includes 1 public key (PuK1).

The first token remittance information RI1 may mean information that can be included in a blockchain ledger including a plurality of blocks made in a chain form, and the first token TA1 is a blockchain-based electronic money, digital currency, It can mean the amount of cryptocurrency or virtual currency.

The second token remittance electronic wallet 323 generates the second token remittance information RI2 (S130-2). The second token remittance information RI2 includes the second address of the second user (U2A2), the second address of the first user (U1A2), the second token (TA2), the digitally signed second transaction (STS2), and the second Includes 2 public keys (PuK2).

The second token remittance information RI2 may mean information that can be included in a blockchain ledger including a plurality of blocks made in a chain form, and the second token TA2 is a blockchain-based electronic money, digital currency, It can mean the amount of cryptocurrency or virtual currency.

FIG. 3 is a diagram for explaining embodiments of operations of electronic wallets included in the block chain system shown in FIG. 1 . In FIG. 3 , for convenience of explanation, it is assumed that the first user remits the first token TA1 to the second user and the second user remits the second token TA2 to the first user.

The first token remittance electronic wallet 221 included in the first electronic wallet 220 of the first user generates a pair (<PrK1, PuK1>) of a first private key (PrK1) and a first public key (PuK1). do (S110a).

The first user uses the first input device 201 of the first computing device 200 to the first address (U2A1) of the second user and a first token (or first token amount; TA1) corresponding to the remittance amount is input to the first token remittance electronic wallet 221, the first token remittance electronic wallet 221 is the first public key (PuK1) and the first A first transaction TS1 [PuK1, U2A1, TA1] including an address U2A1 and a first token TA1 is generated, and the first transaction TS1 is digitally signed with the first private key PrK1. A digitally signed first transaction STS1 is generated (S120a).

The second token remittance electronic wallet 323 included in the second user's second electronic wallet 320 generates a pair (<PrK2, PuK2>) of a second private key (PrK2) and a second public key (PuK2). do (S110b).

The second user uses the second input device 301 of the second computing device 300 to the second address (U1A2) of the first user and a second token (or second token amount; TA2) corresponding to the remittance amount is input to the second token remittance electronic wallet 323, the second token remittance electronic wallet 323 is the second public key (PuK2) and the second of the first user (ie, the payee of the second token TA2). A second transaction (TS2[PuK2, U1A2, TA2]) including the address U1A2 and the second token TA2 is generated, and the second transaction TS2 is digitally signed with the second private key PrK2. A digitally signed second transaction (STS2) is generated (S120b).

The first token remittance electronic wallet 221 generates the first token remittance information RI1 (S130a). The first token remittance information RI1 includes a first public key (PuK1), a first address (U2A1) of a second user, a first token (TA1), and a first digitally signed transaction (STS1). In this case, the first public key PuK1 is used instead of the first address U1A1 of the first user. According to embodiments, the first address U2A1 of the second user may be a public key generated by the second electronic wallet_A 321 of the second user.

The second token remittance electronic wallet 323 generates the second token remittance information RI2 (S130b). The second token remittance information RI2 includes a second public key (PuK2), a second address (U1A2) of the first user, a second token (TA2), and a digitally signed second transaction (STS2). In this case, the second public key (PuK2) is used instead of the second address (U2A2) of the second user. According to embodiments, the second address U1A2 of the first user may be a public key generated by the first electronic wallet_B 223 of the first user.

FIG. 4 is a diagram for explaining an embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 . A method of exchanging tokens TA1 and TA2 using the relay server 600 is described with reference to FIGS. 1 to 4 .

The first token remittance electronic wallet 221 uses the first token remittance information RI1 generated in step S130-1 of FIG. 2 or step 130a of FIG. 3 as the first token of the third electronic wallet 620. It is transmitted to the processing electronic wallet 621 (S210). The first token remittance information RI1 includes remitter information U1A1 or PuK1, remittee information U2A1, and token amount information TA1. According to embodiments, the first token processing electronic wallet 621 transmits the first token remittance information RI1 to the control module 625 or transmits a first signal indicating that the first token remittance information RI1 is received to the control module It can be sent to (625).

The second token remittance electronic wallet 323 transfers the second token remittance information RI2 generated in step S130-2 of FIG. 2 or step 130b of FIG. 3 to the second token of the third electronic wallet 620. It is transmitted to the processing electronic wallet 623 (S220). The second token remittance information RI2 includes remitter information U2A2 or PuK2, remittee information U1A2, and token amount information TA2. According to embodiments, the second token processing electronic wallet 623 transmits the second token remittance information RI2 to the control module 625 or transmits a second signal indicating that the second token remittance information RI2 is received to the control module It can be sent to (625).

The control module 625 checks whether both the first token remittance information RI1 and the second token remittance information RI2 have been received (or whether both the first and second signals have been received) (S230). That is, the control module 625 checks whether the exchange agreement between the first token TA1 and the second token TA2 is consistent according to the confirmation result ( S230 ).

After both the first token remittance information RI1 and the second token remittance information RI2 are received (or after both the first and second signals are received), the control module 625 generates a transmission instruction signal to to each processed electronic wallet 621 and 623 .

The first token processing electronic wallet 621 transmits the first token remittance information RI1 to the first token receiving electronic wallet 321 in response to the transmission instruction signal (S240). The first token receiving electronic wallet 321 publishes the first token remittance information RI1 to the first blockchain network 400 (S260). That is, the first token receiving electronic wallet 321 of the recipient of the first token is a token to be received from the sender (that is, the first token (TA1) to be remitted by the first user) or the first token remittance electronic wallet 221. The first token remittance information RI1 digitally signed with the key is published to the first blockchain network 400 (S260).

The blockchain node 410 of the first blockchain network 400 receives (or picks up) the first token remittance information RI1 transmitted from the first token receiving electronic wallet 321, and A next block of blocks CB (this is also referred to as a 'new block'; NB) is generated, and the first token remittance information RI1 is stored in the next block NB.

For example, the first token receiving electronic wallet 321 or the block chain node 410 transmits the first token remittance information (RI1, or a transaction including the first token remittance information RI1) to the block chain node 410 It can be stored in the next block (NB) of

According to embodiments, when the first token remittance information RI1 is stored (or published) in the next block NB of the blockchain node 410, the first token remittance information RI1 is stored (or published) ), the first token remittance electronic wallet 221 may update the token balance of the first user after the first token TA1 is stored (or published).

The second token processing electronic wallet 623 transmits the second token remittance information RI2 to the second token receiving electronic wallet 223 in response to the transmission instruction signal (S250). The second token receiving electronic wallet 223 publishes the second token remittance information RI2 to the second blockchain network 500 (S270). That is, the second token receiving electronic wallet 223 is a token to be received from the sender (ie, the second token (TA2) to be remitted by the second user) or the second electronically signed with the private key of the second token remittance electronic wallet 323. Publish the token remittance information to the second blockchain network 500 (S270).

The block chain node 510 of the second block chain network 500 receives (or picks up) the second token remittance information (RI2) transmitted from the second token receiving electronic wallet 223, and blocks existing blocks ( CB) generates the next block (this is also referred to as a 'new block'; NB), and stores the second token remittance information RI2 in the next block NB.

For example, the second token receiving electronic wallet 223 or the blockchain node 510 transmits the second token remittance information (RI2, or a transaction including the second token remittance information (RI2)) to the second block chain network ( 500) or the next block NB of the blockchain node 510.

According to embodiments, when the second token remittance information RI2 is stored (or published) in the next block NB of the blockchain node 510, storage (or publishing) of the second token remittance information RI2 The second token remittance electronic wallet 223 that monitors for may update the token balance of the second user after the second token TA2 is stored (or published).

FIG. 5 is a diagram for explaining an embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 . A method of exchanging tokens TA1 and TA2 using the relay server 600 is described with reference to FIGS. 1 to 5 .

The first token remittance electronic wallet 221 uses the first token remittance information RI1 generated in step S130-1 of FIG. 2 or step 130a of FIG. 3 as the first token of the third electronic wallet 620. It is transmitted to the processing electronic wallet 621 (S210). In addition, the first token remittance electronic wallet 221 transmits first receipt information RI2a including token amount information (TA2, also referred to as fourth token amount information) to be received by the first user from the second user as the first token It is transmitted to the processing electronic wallet 621 (S210a).

The first token remittance information (RI1) includes remitter information (U1A1 or PuK1), remittee information (U2A1), and token amount information (TA1), and the first remittance information (RI2a) includes remitter information, remittee information, and tokens. Includes amount information TA2. According to embodiments, the first token processing electronic wallet 621 may transmit the first token remittance information RI1 and the first receipt information RI2a to the control module 625 .

The second token remittance electronic wallet 323 transfers the second token remittance information RI2 generated in step S130-2 of FIG. 2 or step 130b of FIG. 3 to the second token of the third electronic wallet 620. It is transmitted to the processing electronic wallet 623 (S220). In addition, the second token remittance electronic wallet 323 transmits the second receipt information RI1a including token amount information (TA1, also referred to as third token amount information) to be received by the second user from the first user as the second token. It is transmitted to the processing electronic wallet 623 (S220a).

The second token remittance information (RI2) includes remitter information (U2A2 or PuK2), remittee information (U1A2), and token amount information (TA2), and the second remittance information (RI1a) includes remitter information, remittee information, and tokens. Includes amount information TA1.

The sender information, the payee information, and the token amount information included in each of the first token remittance information (RI1) and the second remittance information (RI1a) must match each other, and the second token remittance information (RI2) and the first remittance information ( RI2a) The sender information, the payee information, and the token amount information included in each must match each other. According to embodiments, the second token processing electronic wallet 623 may transmit the second token remittance information RI2 and the second receipt information RI1a to the control module 625 .

The control module 625 checks whether the first token remittance information RI1, the first remittance information RI2a, the second token remittance information RI2, and the second remittance information RI1a are all received (S230) .

For example, the sender information, the payee information, and the token amount information included in each of the first token remittance information RI1 and the second remittance information RI1a coincide with each other, and the second token remittance information RI2 and the first When the sender information, the payee information, and the token amount information included in each of the remittance information RI2a match each other, the control module 625 determines that the exchange agreement between the first token TA1 and the second token TA2 is consistent. It can be determined (S230).

According to an embodiment, when the token amounts included in each piece of information (RI1 and RI1a) are the same and the token amounts included in each piece of information (RI2 and RI2a) are the same, the control module 625 controls the first token (TA1) and the second token (TA1). It may be determined that the exchange agreement of the two tokens TA2 is consistent (S230).

For example, the control module 625 uses the first token remittance information RI1, the first remittance information RI2a, the second token remittance information RI2, and the second remittance information RI1a to the first user It is determined whether the token amount information (TA1 and/or TA2) to be exchanged with the second user matches.

If it is determined that the token amount information TA1 that the first user will send to the second user and the token amount information TA2 that the first user will receive from the second user match, the control module 625 generates a transmission instruction signal. to each processed electronic wallet (621 and 623).

The first token processing electronic wallet 621 transmits the first token remittance information RI1 to the first token receiving electronic wallet 321 in response to the transmission instruction signal (S240). The first token receiving electronic wallet 321 publishes the first token remittance information RI1 to the first blockchain network 400 (S260). That is, the first token receiving electronic wallet 321 of the recipient of the first token transmits the token to be received from the sender (that is, the first token (TA1) sent by the first user) or the first token remittance information (RI1) to the first Digitally sign the token remittance electronic wallet 221 with the private key and publish the digitally signed token (or digitally signed first token remittance information) to the first block chain network 400 (S260).

The block chain node 410 of the first block chain network 400 receives (or picks up) the first token remittance information (RI1) transmitted from the first token receiving electronic wallet 321, and blocks existing blocks ( CB) generates the next block (this is also referred to as a 'new block'; NB), and stores the first token remittance information RI1 in the next block NB.

For example, the first token receiving electronic wallet 321 or the block chain node 410 generates the first token remittance information (RI1, or a transaction including the first token remittance information (RI1)) to create a block chain node ( 410 may be stored in the next block NB.

According to embodiments, when the first token remittance information RI1 is stored (or published) in the next block NB of the blockchain node 410, the first token remittance information RI1 is stored (or published) ), the first token remittance electronic wallet 221 may update the token balance of the first user after the first token TA1 is stored (or published).

The second token processing electronic wallet 623 transmits the second token remittance information RI2 to the second token receiving electronic wallet 223 in response to the transmission instruction signal (S250). The second token receiving electronic wallet 223 publishes the second token remittance information RI2 to the second blockchain network 500 (S270). That is, the second token receiving electronic wallet 223 transmits the token to be received from the sender (ie, the second token (TA2) transmitted by the second user) or the second token remittance information (RI2) to the second token remittance electronic wallet 323 . ) and publishes the digitally signed token (or digitally signed second token remittance information) to the second blockchain network 500 by digitally signing (S270).

The block chain node 510 of the second block chain network 500 receives (or picks up) the second token remittance information (RI2) transmitted from the second token receiving electronic wallet 223, and blocks existing blocks ( CB) generates the next block (this is also referred to as a 'new block'; NB), and stores the second token remittance information RI2 in the next block NB.

For example, the second token receiving electronic wallet 223 or the block chain node 510 generates the second token remittance information (RI2, or a transaction including the second token remittance information (RI2)) to generate the second block chain It can be stored in the next block NB of the network 500 or the blockchain node 510 .

According to embodiments, when the second token remittance information RI2 is stored (or published) in the next block NB of the blockchain node 510, storage (or publishing) of the second token remittance information RI2 The second token remittance electronic wallet 223 that monitors for may update the token balance of the second user after the second token TA2 is stored (or published).

FIG. 6 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 . The third electronic wallet 620 performs steps S211 and S213 of confirming the first token TA1 to the second user and steps S221 and S223 of confirming the second token TA2 to the first user. do more

6, 8, and 10, information (RI1-1, RI2-1, MSGa, or MSGb) transmitted from the relay server 600 to the electronic wallet 321 or 223 includes remitter information, Recipient information and remittance amount are included, and the relay server 600 has its own key (for example, information (RI1-1, RI2-1, MSGa, Alternatively, MSGb) can be digitally signed and the digitally signed information can be transmitted to the electronic wallet 321 or 223. At this time, the electronic wallet 321 or 223 decrypts the digitally signed information with the public key of the relay server 600 to receive the information. You can check whether the contents of (RI1-1, RI2-1, MSGa, or MSGb) are correct.

Accordingly, the information (RI1-1, RI2-1, MSGa, or MSGb) shown in FIGS. 6, 8, and 10 collectively refers to unsigned information and digitally signed information.

The first token processing electronic wallet 621 generates first token confirmation information RI1-1 based on the first token remittance information RI1 received through step S210, and the first token confirmation information RI1 -1) is transmitted to the first token receiving electronic wallet 321 (S211). The first token confirmation information (RI1-1) includes the first token remittance information (U1A1 or PuK1) extracted from the first token remittance information (RI1), the first token recipient information (U2A1), and the first token (TA1). include

Since the second user (corresponding to U2A1) already knows the first token (TA1) negotiated with the first user (corresponding to U1A1), the second user receives the first token through the electronic wallet 321 When the token confirmation information (RI1-1) is confirmed, the first token receiving electronic wallet 321 receives a first confirmation signal (ACK1) based on the confirmation (or confirmation signal) input (or processed) by the second user. is generated and transmitted to the first token processing electronic wallet 621 (S213). The first token processing electronic wallet 621 transmits a first confirmation signal ACK1 to the control module 625 .

The second token processing electronic wallet 623 generates second token confirmation information RI2-1 based on the second token remittance information RI2 received through step S220, and the second token confirmation information RI2 -1) is transmitted to the second token receiving electronic wallet 223 (S221). The second token confirmation information (RI2-1) includes the second token remittance information (U2A2 or PuK2) extracted from the second token remittance information (RI2), the second token recipient information (U1A2), and the second token (TA2). include

Since the first user (corresponding to U1A2) already knows the second token (TA2) negotiated with the second user (corresponding to U2A2), the first user receives the second token through the electronic wallet 223 When the token confirmation information (RI2-1) is confirmed, the second token receiving electronic wallet 223 receives a second confirmation signal (ACK2) based on the confirmation (or confirmation signal) input (or processed) by the first user. is generated and transmitted to the second token processing electronic wallet 623 (S223). The second token processing electronic wallet 623 transmits a second confirmation signal ACK2 to the control module 625 .

The control module 625 checks whether both the first acknowledgment signal ACK1 and the second acknowledgment signal ACK2 are received ( S231 ). For example, the control module 625 determines the reception (or based on the fact that they have been received) of both the acknowledgment signals ACK1 and ACK2 as a match of the exchange agreement.

After both the first acknowledgment signal ACK1 and the second acknowledgment signal ACK2 are received (that is, when there is no problem in the exchange of tokens TA1 and TA2), the control module 625 generates a transmission instruction signal to each processed electronic wallet (621 and 623).

The first token processing electronic wallet 621 transmits the first token remittance information RI1 to the first token receiving electronic wallet 321 in response to the transmission instruction signal (S240), and the second token processing electronic wallet 623 transmits the second token remittance information RI2 to the second token receiving electronic wallet 223 in response to the transmission instruction signal (S250).

FIG. 7 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 . A method of exchanging tokens TA1 and TA2 using the relay server 600 is described with reference to FIGS. 1, 2, 3, and 7 .

Each of the electronic wallets 220 and 320 may perform a lock function according to each user's setting in order to guarantee payment of tokens. The lock function is a function that safely guarantees the exchange of each token (TA1 and TA2) used for remittance to the other party.

For example, when the token balance of the first user is 100 and the first token TA1 is 50, if a lock function is performed on the first user, the first token TA1 of the first user and the second user During the exchange (or atomic exchange) of the second token TA2 of , the first user cannot use more than 50 in the token balance.

Therefore, if the lock function is set by each remitter, each remittee has the effect of being able to safely receive the locked token until the lock function is released. For example, the lock function cannot be released by either the sender or the recipient of the token, but can be released by agreement of both parties. For example, when the first token TA1 is 50, the 50 includes a token transaction (or exchange) fee.

The first token remittance electronic wallet 221 performs a lock function on the first token TA1 (S301), and the second token remittance electronic wallet 323 performs a lock function on the second token TA2. (S303). The first token remittance electronic wallet 221 shown in each of FIGS. 4 to 10 may perform a locking function on the first token TA1, and the second token remittance electronic wallet 323 provides the second token TA2. ) can be locked.

The first token remittance electronic wallet 221 uses the first token remittance information RI1 generated in step S130-1 of FIG. 2 or step 130a of FIG. 3 as the first token of the third electronic wallet 620. It is transmitted to the processing electronic wallet 621 (S310). According to embodiments, the first token processing e-wallet 621 may transmit the first token remittance information RI1 to the control module 625, and transmit a first signal indicating that the first token remittance information RI1 has been received. may be transmitted to the control module 625 .

The second token remittance electronic wallet 323 transfers the second token remittance information RI2 generated in step S130-2 of FIG. 2 or step 130b of FIG. 3 to the second token of the third electronic wallet 620. It is transmitted to the processing electronic wallet 623 (S320). According to embodiments, the second token processing electronic wallet 623 may transmit the second token remittance information RI2 to the control module 625, and transmit a second signal indicating that the second token remittance information RI2 has been received. may be transmitted to the control module 625 .

The control module 625 checks whether both the first token remittance information RI1 and the second token remittance information RI2 are received (or whether both the first and second signals are received) (S330).

After both the first token remittance information RI1 and the second token remittance information RI2 are received (or after both the first and second signals are received), the control module 625 generates a publish instruction signal. to each processed electronic wallet (621 and 623).

The first token processing electronic wallet 621 publishes the first token remittance information RI1 to the first blockchain network 400 in response to the publish instruction signal transmitted from the control module 625 (S340). The first token remittance information (RI1) is information digitally signed by the first token remittance electronic wallet 221, and the electronic wallet 620 or 621 transmits the electronically signed information RI1 to the electronic wallet 221 or 321 instead of the electronic wallet 221 or 321. Since it is publishing, the electronic wallet 620 or 621 may publish the digitally signed information RI1 to the first block chain network 400 .

When the first token processing electronic wallet 621 publishes the first token remittance information RI1 to the first block chain network 400, the first public wallet 621 indicates that the first token remittance information RI1 has been published. Generates a time notification signal NT1. The first publish notification signal NT1 is transmitted to the second token processing electronic wallet 623 through the control module 625 , and the second token processing electronic wallet 623 transmits the first publish notification signal NT1 It is transmitted to the second token remittance electronic wallet 323 (S360). When the first token receiving electronic wallet 321 can monitor the first token remittance information RI1 published in the first blockchain network 400, the generation and transmission of the first publication notification signal NT1 is is omitted.

The block chain node 410 of the first block chain network 400 receives (or picks up) the first token remittance information RI1 published by the first token processing electronic wallet 621, and the block that already exists The next block NB of the CBs is generated, and the first token remittance information RI1 is stored in the next block NB.

According to embodiments, when the first token remittance information RI1 is stored (or published) in the next block NB of the blockchain node 410, the first token remittance information RI1 is transmitted to the first block chain network ( The first token remittance electronic wallet 221 monitoring the storage (or publication) in 400) may update the token balance of the first user after the first token TA1 is stored (or published).

According to embodiments, when the first token remittance information RI1 is stored (or published) in the next block NB of the blockchain node 410, the first token remittance information RI1 is stored (or published) ), the first token receiving electronic wallet 321 may read the first token remittance information RI1 stored in the next block NB of the blockchain node 410 .

The second token processing electronic wallet 623 publishes the second token remittance information RI2 to the second block chain network 500 in response to the publish instruction signal transmitted from the control module 625 (S350). The second token remittance information RI2 is information digitally signed by the second token remittance electronic wallet 323, and the electronic wallet 620 or 623 transmits the electronically signed information RI2 to the electronic wallet 223 or 323 instead of the electronic wallet 223 or 323. Since it is publishing, the electronic wallet 600 or 623 may publish the digitally signed information RI2 to the second block chain network 500 .

When the second token processing electronic wallet 623 publishes the second token remittance information RI2 to the second block chain network 500, the second token remittance information RI2 indicates that the second token remittance information RI2 has been published. A publish notification signal NT2 is generated. The second publish notification signal NT2 is transmitted to the first token processing electronic wallet 621 through the control module 625, and the first token processing electronic wallet 621 transmits the second publish notification signal NT2. The first token is transmitted to the remittance electronic wallet 221 (S370). When the second token receiving electronic wallet 223 can monitor the second token remittance information RI2 published in the second blockchain network 500, the generation and transmission of the second publication notification signal NT2 is is omitted.

The blockchain node 510 of the second blockchain network 500 receives (or picks up) the second token remittance information RI2 stored (or published) by the second token processing electronic wallet 623, A next block NB of the existing blocks CB is created, and the second token remittance information RI2 is stored in the next block NB.

According to embodiments, when the second token remittance information RI2 is stored (or published) in the next block NB of the blockchain node 510, the second token remittance information RI2 is transmitted to the second block chain network ( 500), the second token remittance electronic wallet 323 monitoring the storage (or publishing) may update the token balance of the second user after the second token TA2 is stored (or published).

According to embodiments, when the second token remittance information RI2 is stored (or published) in the next block NB of the blockchain node 510, the second token remittance information RI2 is stored (or published) ), the second token receiving electronic wallet 223 may read the second token remittance information RI2 stored in the next block NB of the blockchain node 510 .

FIG. 8 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 . Referring to FIGS. 7 and 8 , the third electronic wallet 620 provides the second user with the steps S311 and S313 of pre-confirming the first token TA1 and the first user with the second token TA2. Steps (S321 and S323) of confirming in advance are further performed.

The first token processing electronic wallet 621 generates first token confirmation information RI1-1 based on the first token remittance information RI1 received through step S310, and the first token confirmation information RI1 -1) is transmitted to the first token receiving electronic wallet 321 (S311). The first token confirmation information RI1-1 includes the first token remittance information U1A1, the first token remittee information U2A1, and the first token TA1 extracted from the first token remittance information RI1. .

Since the second user already knows the first token TA1 negotiated with the first user, when the second user checks the first token confirmation information RI1-1 through the first token receiving electronic wallet 321, The first token receiving electronic wallet 321 generates a first confirmation signal (ACK1) based on the confirmation (or confirmation signal) input (or processed) by the second user to process the first token electronic wallet 621 to (S313). The first token processing electronic wallet 621 transmits a first confirmation signal ACK1 to the control module 625 .

The second token processing electronic wallet 623 generates second token confirmation information RI2-1 based on the second token remittance information RI2 received through step S320, and the second token confirmation information RI2 -1) is transmitted to the second token receiving electronic wallet 223 (S321). The second token confirmation information (RI2-1) includes the second token remittance information (U2A2) extracted from the second token remittance information (RI2), the second token remittee information (U1A2), and the second token (TA2). .

Since the first user already knows the second token TA2 negotiated with the second user, when the first user checks the second token confirmation information RI2-1 through the second token receiving electronic wallet 223, The second token receiving electronic wallet 223 generates a second confirmation signal ACK2 based on the confirmation (or confirmation signal) inputted (or processed) by the first user to generate a second token processing electronic wallet 623 . to (S323). The second token processing electronic wallet 623 transmits a second confirmation signal ACK2 to the control module 625 .

The control module 625 confirming the exchange agreement between the first user and the second user checks whether both the first acknowledgment signal ACK1 and the second acknowledgment signal ACK2 are received (S331).

After both the first acknowledgment signal ACK1 and the second acknowledgment signal ACK2 are received (that is, when there is no problem in the exchange of tokens TA1 and TA2), the control module 625 transmits a publish instruction signal. generated and transmitted to each processed electronic wallet 621 and 623.

The first token processing electronic wallet 621 publishes the first token remittance information RI1 to the first blockchain network 400 in response to the publish instruction signal transmitted from the control module 625 (S340).

The second token processing electronic wallet 623 publishes the second token remittance information RI2 to the second block chain network 500 in response to the publish instruction signal transmitted from the control module 625 (S350). As described above, the generation and transmission of the first publish notification signal NT1 and the generation and transmission of the second publish notification signal NT2 may be omitted.

FIG. 9 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 . A method of exchanging tokens TA1 and TA2 using the relay server 600 is described with reference to FIGS. 1, 2, 3, and 9 .

The first token remittance electronic wallet 221 uses the first token remittance information RI1 generated in step S130-1 of FIG. 2 or step 130a of FIG. 3 as the first token of the third electronic wallet 620. The processing is transmitted to the electronic wallet 621 (S410), and the second token remittance electronic wallet 323 is the second token remittance information (RI2) generated in step S130-2 of FIG. 2 or step 130b of FIG. ) to the second token processing electronic wallet 623 of the third electronic wallet 620 (S420).

Since the second user already knows the first token TA1 negotiated with the first user, when the second user inputs the first token TA1 into the first token receiving electronic wallet 321, the first token receiving electronic The wallet 321 generates a first message MSG1 including information on the first token TA1 and transmits it to the first token processing electronic wallet 621 (S412), and the first token processing electronic wallet 621 ) transmits the first message MSG1 to the control module 625 .

Since the first user already knows the second token TA2 negotiated with the second user, when the first user inputs the second token TA2 into the second token receiving electronic wallet 223, the second token receiving electronic The wallet 223 generates a second message MSG2 including information on the second token TA2 and transmits it to the first token processing electronic wallet 623 (S422), and the second token processing electronic wallet 623 ) transmits the second message MSG2 to the control module 625 .

The control module 625 checks whether both the first message MSG1 and the second message MSG2 have been received (S430).

When both the first message MSG1 and the second message MSG2 are received (that is, when there is no problem in the exchange of tokens TA1 and TA2), the control module 625 generates a transmission instruction signal to each transfer to processing e-wallets 621 and 623 .

According to embodiments, the first token processing e-wallet 621 receives the first token remittance information RI1 from the first token remittance e-wallet 221 (S410), and from the first token remittance e-wallet 321 Receive the first information MSG1 for the first token TA1 (S412), the first token TA1 included in the first token remittance information RI1, and the first information MSG1 included in the first token remittance information RI1 It is determined whether the token (TA1) matches or not, a first signal indicating the match is transmitted to the control module 625, and in response to the transmission instruction signal, the first token remittance information (RI1) is transmitted to the first token receiving electronic wallet 321 ) to (S440).

The second token processing e-wallet 623 receives the second token remittance information RI2 from the second token remittance e-wallet 323 (S420), and the second token TA2 from the second token remittance e-wallet 223 ) for receiving the second information MSG2 (S422), and the second token TA2 included in the second token remittance information RI2 and the second token TA2 included in the second information MSG2. It is determined whether a match is made, and a second signal indicating the match is transmitted to the control module 625 , and in response to the transmission instruction signal, the second token remittance information RI2 is transmitted to the second token receiving electronic wallet 223 . (S450).

At this time, the control module 625 responds to the first signal transmitted from the first token processing electronic wallet 621 and the second signal transmitted from the second token processing electronic wallet 623 for each step (S440 and S450). A transmission instruction signal is generated and transmitted to each token processing electronic wallet 621 and 623.

According to embodiments, the first token processing electronic wallet 621 receives the first token remittance information RI1 and transmits it to the control module 625, and transmits the first information MSG1 for the first token TA1. It is received and transmitted to the control module 625 , and in response to the transmission instruction signal, the first token remittance information (RI1) is transmitted to the first token receiving electronic wallet 321 .

The second token processing electronic wallet 623 receives and transmits the second token remittance information (RI2) to the control module 625, and receives the second information (MSG2) for the second token (TA2) to the control module ( 625), and transmits the second token remittance information RI2 to the second token receiving electronic wallet 223 in response to the transmission instruction signal.

At this time, the control module 625 determines that the first token TA1 included in the first token remittance information RI1 matches the first token TA1 included in the first information MSG1, and the second token remittance information ( It is checked whether the second token TA2 included in RI2) matches the second token TA2 included in the second information MSG2, and when they match, a transmission instruction signal for each step (S440 and S450) is provided. It is generated and transmitted to each token processing electronic wallet (621 and 623).

The first token processing electronic wallet 621 transmits the first token remittance information RI1 to the first token receiving electronic wallet 321 in response to the transmission instruction signal (S440), and the first token receiving electronic wallet 321 publishes the first token remittance information RI1 to the first blockchain network 400 (S460).

The second token processing electronic wallet 623 transmits the second token remittance information (RI2) to the second token receiving electronic wallet 223 in response to the transmission instruction signal (S450), and the second token receiving electronic wallet 223 publishes the second token remittance information (RI2) to the second block chain network 500 (S470).

According to embodiments, the first token processing electronic wallet 621 may transmit the received first token remittance information RI1 to the first token receiving electronic wallet 321 (S440), and the received first token remittance information (RI1) may be published directly to the first blockchain network 400. In addition, the second token processing electronic wallet 623 may transmit the received second token remittance information (RI2) to the second token receiving electronic wallet 223 (S450), and the received second token remittance information (RI2) can publish directly to the second block chain network 500 .

FIG. 10 is a diagram for explaining another embodiment of a method of exchanging different block chain tokens using the block chain system shown in FIG. 1 . A method of exchanging the first token TA1 and the second token TA2 that have already been agreed upon by the first user and the second user using the relay server 600 will be described with reference to FIGS. 1 and 10 .

When the first user inputs the first token remittance information (U1A1), the first token remittee information (U2A1), and the first token (TA1) into the first token remittance electronic wallet 221, the first token remittance electronic wallet ( 221) generates the first remittance information (RI3) including the first identification information (SAD1) of the relay server 600 that it knows in advance, and transfers the first remittance information (RI3) to the first token remittance electronic wallet ( 221) and publishes the digitally signed first remittance information to the first blockchain network 400 (S510), generates a first message (MSGa), and processes the first token electronic wallet 621 to (S512).

The first remittance information RI3 includes the first token remitter information U1A1, the first identification information SAD1 of the relay server 600, and the first token TA1, and the first message MSGa 1 token remitter information (U1A1) , first token remittee information (U2A1), and a first token (TA1). For example, the first identification information SAD1 is unique information that can identify the relay server 600 in the first block chain network 400 .

According to embodiments, the first token remittance electronic wallet 221 includes a first token remitter information U1A1, first identification information SAD1 of the relay server 600, and a first token TA1. A transaction (TSa) is generated, and the first transaction (TSa) is digitally signed with the first private key (PrK1) to generate a digitally signed first transaction (STSa), the first token sender information (U1A1), and the relay server First remittance information (RI3) including the first identification information (SAD1), the first token (TA1), the digitally signed first transaction (STSa), and the first public key (PuK1) of 600 to be generated can That is, the first token remittance electronic wallet 221 performs the remittance process with the third electronic wallet 620 as the payee.

When the first user publishes for the relay server 600, the relay server 600 becomes the payee, and when the relay server 600 publishes for the second user, the relay server 600 becomes the sender.

In some embodiments, information for generating the first remittance information RI3 and information for generating the first message MSGa may be input separately.

When the second user inputs the second token remittance information (U2A2), the second token remittee information (U1A2), and the second token (TA2) to the second token remittance electronic wallet 323, the second token remittance electronic wallet ( 323) generates the second remittance information (RI4) including the second identification information (SAD2) of the relay server 600 that it knows in advance, and transfers the second remittance information (RI4) to the second token remittance electronic wallet ( 323), publishes the digitally signed second remittance information to the second blockchain network 500 (S520), and generates a second message (MSGb) to process the second token electronic wallet (623) to (S522).

The second remittance information (RI4) includes the second token remitter information (U2A2), the second identification information (SAD2) of the relay server 600, and the second token (TA2), and the second message (MSGb) is 2 token remitter information (U2A2) , second token remittee information (U1A2), and a second token (TA2). For example, the second identification information SAD2 is unique information that can identify the relay server 600 in the second block chain network 500 .

According to embodiments, the second token remittance electronic wallet 323 includes a second token remitter information (U2A2), second identification information (SAD2) of the relay server 600, and a second token (TA2). A transaction (TSb) is generated, a second transaction (TSb) is digitally signed with a second private key (PrK2), and a digitally signed second transaction (STSb) is generated, the second token sender information (U2A2), and the relay server Second remittance information (RI4) including the second identification information (SAD2) of 600, the second token (TA2), the digitally signed second transaction (STSb), and the second public key (PuK2) can That is, the second token remittance electronic wallet 323 performs the remittance process with the third electronic wallet 620 as the payee.

According to embodiments, information for generating the second remittance information RI4 and information for generating the second message MSGb may be input separately.

The blockchain node 410 receives (or picks up) the token remittance information (RI3) published by the first token remittance electronic wallet 221, and sends the next block (NB) of the blocks (CB) that already exist. and store the first remittance information RI3 in the next block NB.

The blockchain node 510 receives (or picks up) the second remittance information RI4 published by the second token remittance electronic wallet 323, and the next block (NB) of the already existing blocks (CB). and stores the second remittance information RI4 in the next block NB.

The first token processing electronic wallet 621 monitors whether the first remittance information (RI3) is published to the first block chain network 400 (S530), and the first remittance information (RI3) is published. In this case, the first token processing e-wallet 621 reads the first remittance information RI3, and the first token receiving e-wallet 321 corresponding to the first token recipient information U2A1 included in the first message MSGa. ) to transmit the first message (MSGa) (S532).

Since the second user already knows the first token TA1 negotiated with the first user, when the second user confirms the first message MSGa through the first token receiving electronic wallet 321, the first token is received The electronic wallet 321 generates a first confirmation signal ACK1 based on the confirmation input (or processed) by the second user and transmits it to the first token processing electronic wallet 621 (S534). The first token processing electronic wallet 621 transmits a first confirmation signal ACK1 to the control module 625 .

Step S412 shown in FIG. 9 instead of steps S532 and S534 shown in FIG. 10 may be applied to the embodiment of FIG. 10 , and steps S542 and S544 shown in FIG. 10 may be used instead of steps S542 and S544 shown in FIG. Step S422 shown in may be applied to the embodiment of FIG. 10 . In this case, the first token processing electronic wallet 621 may perform step S560 after receiving the information on the first token TA1, and the second token processing electronic wallet 623 receives the second token ( After receiving the information on TA2), step S570 may be performed.

The second token processing electronic wallet 623 monitors whether the second remittance information (RI4) is published to the second block chain network 500 (S540), and the second remittance information (RI4) is published. In this case, the second token processing e-wallet 623 reads the second remittance information RI4, and the second token receiving e-wallet 223 corresponding to the second token remittee information U1A2 included in the second message (MSGb). ) to transmit the second message (MSGb) (S542).

Since the first user already knows the second token (TA2) negotiated with the second user, when the first user confirms the second message (MSGb) through the second token receiving electronic wallet 223, the second token is received The electronic wallet 223 generates a second confirmation signal ACK2 based on the confirmation input (or processed) by the first user and transmits it to the second token processing electronic wallet 623 (S544). The second token processing electronic wallet 623 transmits a second confirmation signal ACK2 to the control module 625 .

The control module 625, which checks whether the exchange agreement is consistent, checks whether both the first acknowledgment signal ACK1 and the second acknowledgment signal ACK2 are received (S550).

After both the first acknowledgment signal ACK1 and the second acknowledgment signal ACK2 are received (that is, when there is no problem in the exchange of tokens TA1 and TA2), the control module 625 transmits a publish instruction signal. generated and transmitted to each processed electronic wallet 621 and 623.

The first token processing electronic wallet 621 generates third remittance information RI5 in response to the publish instruction signal and publishes it to the first blockchain network 400 for the second user (S560). That is, the first token processing electronic wallet 621 digitally signs the third remittance information (RI5) with the private key of the first token processing electronic wallet 621, and then transfers the digitally signed third remittance information to the first block chain network ( 400) and publish (S560). The third remittance information RI5 includes the first identification information SAD1 of the relay server 600 , the first token remittee information U2A1 , and the first token TA1 .

The first token receiving electronic wallet 321 monitors whether the third remittance information (RI5) is published to the first block chain network 400 (S580), and the third remittance information (RI5) is the first block When published to the chain network 400 , the third remittance information RI5 is read from the block chain node 410 .

The second token processing electronic wallet 623 generates the fourth remittance information RI6 in response to the publish indication signal and publishes it to the second blockchain network 500 for the first user (S570). That is, the second token processing electronic wallet 623 digitally signs the fourth remittance information (RI6) with the private key of the second token processing electronic wallet 623, and then transfers the digitally signed fourth remittance information to the second block chain network ( 500) to publish (S570). The fourth remittance information RI6 includes second identification information SAD2 of the relay server 600 , second token remittee information U1A2 , and second token information TA2 .

The second token receiving electronic wallet 223 monitors whether the fourth remittance information (RI6) is published to the second block chain network 500 (S590), and the fourth remittance information (RI6) is transmitted to the second block When published to the chain network 500 , the fourth remittance information RI6 is read from the block chain node 510 .

Each piece of information RI3, RI4, MSGa, MSGb, RI5, and RI6 includes sender information, payee information, and token amount.

Although the present invention has been described with reference to the embodiment shown in the drawings, which is merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: blockchain system or blockchain remittance system
200: first user computing device
220: first electronic wallet
221: first electronic wallet_A
223: second electronic wallet_B
225: first control module
227: first communication module
230: first transceiver
300: second user computing device
320: second electronic wallet
321: first electronic wallet_B
323: second electronic wallet_B
325: second control module
327: second communication module
330: second transceiver
400: first blockchain network
500: 2nd blockchain network
600: relay server
620: electronic wallet
621: 1st token processing electronic wallet
623: Second Token Processing Electronic Wallet

Claims (12)

In the method of operating a server for token exchange,
receiving, by the server, first token remittance information for remittance of a first token used in a first block chain network from a first computing device;
receiving, by the server, second token remittance information for remittance of a second token used in a second block chain network different from the first block chain network from a second computing device;
The server determines whether an exchange agreement between the first token and the second token is consistent with the first token remittance information transmitted from the first computing device and the second token remittance information transmitted from the second computing device judging; and
If it is determined that the exchange agreement is consistent, the server publishes the first token remittance information to the first blockchain network instead of the first computing device, and the server uses the second token instead of the second computing device A method of operating a server for token exchange, comprising publishing remittance information to the second block chain network. According to claim 1,
When both the reception of the first token remittance information and the reception of the second token remittance information are confirmed, the server determines that the exchange agreement agrees. The method of claim 1, wherein determining whether the exchange agreement is consistent comprises:
generating, by the server, first token confirmation information including the first token and transmitting it to the second computing device;
generating, by the server, second token confirmation information including the second token and transmitting it to the first computing device;
receiving, by the server, a first confirmation signal generated by the second computing device based on an input of a second user who has confirmed the first token confirmation information;
receiving, by the server, a second confirmation signal generated by the first computing device based on an input of a first user who has confirmed the second token confirmation information;
and determining, by the server, that the exchange agreement is consistent when both the reception of the first confirmation signal and the reception of the second confirmation signal are confirmed. A computer-readable storage medium in which a program is recorded in a computer for executing the method of operation of a server for token exchange according to claim 1. An electronic wallet stored in a computer-readable storage medium executed by a processor of a server communicating with the first computing device and the second computing device, the electronic wallet comprising:
The electronic wallet executed by the processor of the server receives first token remittance information for remittance of a first token used in a first block chain network from the first computing device,
The electronic wallet executed by the processor of the server receives, from the second computing device, second token remittance information for remittance of a second token used in a second block chain network different from the first block chain network,
The electronic wallet executed by the processor of the server receives the first token and the remittance information based on the first token remittance information transmitted from the first computing device and the second token remittance information transmitted from the second computing device. Check whether the exchange agreement of the second token is consistent,
If it is confirmed that the exchange agreement is consistent, the electronic wallet executed by the processor of the server instead of the first computing device publishes the first token remittance information to the first blockchain network, and the second computing device An electronic wallet stored in a computer-readable storage medium in which the electronic wallet executed by the processor of the server instead publishes the second token remittance information to the second blockchain network. According to claim 5, wherein the electronic wallet executed by the processor of the server,
controller;
Receives the first token remittance information, generates and transmits a first signal indicating the reception to the controller, and transmits the first token remittance information to the first block in response to a publish instruction signal instead of the first computing device a first token processing electronic wallet that publishes on the chain network;
The second token remittance information is received, a second signal indicating the reception is generated and transmitted to the controller, and in response to the publish instruction signal, the second token remittance information is transmitted to the second computer instead of the second computing device. including a second token processing e-wallet that publishes on a blockchain network;
The electronic wallet stored in a computer-readable storage medium, wherein the controller generates the publish instruction signal in response to the first signal and the second signal. According to claim 5, wherein the electronic wallet executed by the processor of the server,
controller;
Based on the first token remittance information, first token confirmation information including the first token is generated and transmitted to the second computing device, and based on an input of a second user who has confirmed the first token confirmation information, the receive a first acknowledgment signal generated by a second computing device, send the first acknowledgment signal to the controller, and send the first token remittance information on behalf of the first computing device in response to a publish instruction signal a first token processing electronic wallet publishing to a first blockchain network; and
Based on the second token remittance information, second token confirmation information including the second token is generated and transmitted to the first computing device, and based on the input of the first user who confirms the second token confirmation information, the receive a second confirmation signal generated by the first computing device, send the second confirmation signal to the controller, and send the second token remittance information on behalf of the second computing device in response to the publish instruction signal a second token processing electronic wallet that publishes to the second blockchain network;
The electronic wallet stored in a computer-readable storage medium, wherein the controller generates the publish instruction signal in response to the first confirmation signal and the second confirmation signal. processor; and
including a computer-readable storage medium on which the program is recorded;
The storage medium is a server for storing the program for performing the method of operation of the server for token exchange according to claim 1. A method of providing a token exchange service using a server communicating with a first computing device and a second computing device, the method comprising:
receiving, by the server, first token remittance information for remittance of a first token used in a first block chain network from the first computing device;
receiving, by the server, second token remittance information for remittance of a second token used in a second block chain network different from the first block chain network from the second computing device;
The server determines whether an exchange agreement between the first token and the second token is consistent with the first token remittance information transmitted from the first computing device and the second token remittance information transmitted from the second computing device judging; and
If it is determined that the exchange agreement is consistent, the server publishes the first token remittance information to the first blockchain network instead of the first computing device, and the server uses the second token instead of the second computing device A method of providing a token exchange service comprising publishing remittance information to the second blockchain network. 10. The method of claim 9,
generating, by the server, a first notification signal indicating that the first token remittance information is published on the first block chain network and transmitting the first notification signal to the second computing device; and
The method further comprising the step of generating, by the server, a second notification signal indicating that the second token remittance information is published to the second blockchain network, and transmitting the second notification signal to the first computing device. The method of claim 9, wherein determining whether the exchange agreement is consistent comprises:
generating, by the server, first token confirmation information including the first token based on the first token remittance information and transmitting the first token confirmation information to the second computing device;
transmitting, by the second computing device, a first confirmation signal generated based on an input of a second user who has confirmed the first token confirmation information to the server;
generating, by the server, second token confirmation information including the second token based on the second token remittance information, and transmitting the second token confirmation information to the first computing device;
transmitting, by the first computing device, a second confirmation signal generated based on an input of a first user who has confirmed the second token confirmation information to the server; and
and determining, by the server, that the exchange agreement is consistent when the first confirmation signal and the second confirmation signal are received. 10. The method of claim 9, wherein the server,
receiving the first token remittance information from a first token remittance electronic wallet executed in the first computing device;
receiving the second token remittance information from a second token remittance electronic wallet executed on the second computing device;
The first token remittance electronic wallet performs a lock function to guarantee payment of the first token,
The method of providing a token exchange service in which the second token remittance electronic wallet performs a lock function to guarantee payment of the second token.

Images