KR20240041818A - Method for transmitting specific data whose data type is not known to relay from first blockchain network to second blockchain network and the relay using the same - Google Patents

Abstract

The present invention relates to a method of transmitting specific data whose format is unknown in a relay from a first blockchain network to a second blockchain network through a relay. Specifically, (a) when the creation of a blockchain communication message for transmitting the specific data from the first blockchain network following a first data format to the second blockchain network conforming to a second data format is detected, Relaying includes generating a relay message including the blockchain communication message and verification information; and (b) the relay transmits the relay message to the second blockchain network, causing the second blockchain network to verify the relay message using the verification information included in the relay message, and , converting the specific data included in the relay message into the second data format and transmitting it to the recipient.

Description

A method of transmitting specific data whose format is unknown in a relay from a first blockchain network to a second blockchain network and relay using the same {METHOD FOR TRANSMITTING SPECIFIC DATA WHOSE DATA TYPE IS NOT KNOWN TO RELAY FROM FIRST BLOCKCHAIN NETWORK TO SECOND BLOCKCHAIN NETWORK AND THE RELAY USING THE SAME}

The present invention relates to a method of transmitting specific data of unknown data format from a first blockchain network to a second blockchain network through a relay, and a relay using the same.

Blockchain, also called a public transaction ledger, is a technology that prevents hacking that can occur when transacting with virtual currency. While existing financial companies store transaction records on a centralized server, blockchain creates blocks through the collaboration of all users participating in the blockchain network, and all participants verify and approve the created blocks. It uses a method of holding identical blocks and preventing data falsification by some users. Blockchain is applied to Bitcoin, a representative online virtual currency. Bitcoin transparently records transaction details in a ledger that anyone can view, and multiple computers using Bitcoin verify these records to prevent hacking.

The concept of smart contract was proposed to conclude and implement various types of contracts such as financial transactions, real estate contracts, and notarization based on blockchain.

Ethereum is a smart contract platform based on blockchain technology, and all possible forms of contracts, such as financial transactions as well as real estate transactions and notarization, are possible on Ethereum.

However, it did not mention that blockchain is performed within a single blockchain network and communicates with other types of blockchain.

For communication between different blockchains, the applicant has disclosed technology for communicating between different blockchains through Korean Application No. 2020-0042242 and Korean Application No. 2020-0076623.

Through the above applications, communication between blockchains is being actively discussed and applied.

In the above application, communication was performed through a relay, but if the relay knew the data format used in each of the two blockchains, there was no major problem in transmitting data between the two blockchains. However, if the relay knew the data format used in each of the two blockchains, there was no major problem. If you do not know the data format used in the blockchains, problems may arise due to encoding and decoding of data in the dApps of each of the two blockchains.

Additionally, a fee may be charged when sending a message from the first blockchain network to the second blockchain network or calling the API of the second blockchain network, and the relay may be used to relay data used in at least some of the two blockchains. If you do not know the format, you will have no choice but to know how much API you need to call from the second blockchain network. However, if the second blockchain network calls all of the corresponding APIs, the relay must cover all the corresponding fees, but the relay does not know how much the corresponding API is, so if the relay actually operates such a service, it is not business-friendly. You may incur losses.

Therefore, there was a need to solve the mentioned problem.

The purpose of the present invention is to provide a method of transmitting specific data whose format is unknown in a relay from a first blockchain network to a second blockchain network via the relay.

In addition, another purpose of the present invention is to enable each smart contract distributed in each blockchain network to call a method of a smart contract of another blockchain to which it does not belong.

In addition, the present invention transmits a message in the form of raw bytes from the first blockchain network to the second blockchain network through a relay, and allows the user to process the delivered message through the decoding algorithm of the DApp of the second blockchain network. , Another purpose is to ensure that the relay transaction cost is predictable at a certain level regardless of the method being called.

In order to achieve the purpose of the present invention as described above and realize the characteristic effects of the present invention described later, the characteristic configuration of the present invention is as follows.

According to one aspect of the present invention, in a method of transmitting specific data of unknown data format in a relay from a first blockchain network to a second blockchain network, (a) the first data conforming to the first data format; When the creation of a blockchain communication message for transmitting the specific data from the blockchain network to the second blockchain network following a second data format is detected, the relay sends a relay message containing the blockchain communication message and verification information. generating a; and (b) the relay transmits the relay message to the second blockchain network, causing the second blockchain network to verify the relay message using the verification information included in the relay message, and , converting the specific data included in the relay message into the second data format and transmitting it to the recipient.

As an example, before step (a), (a0) the relay distributes a first service control smart contract and a first message control smart contract to the first blockchain network and a second message control smart contract to the second blockchain network. Further comprising distributing a service control smart contract and a second message control smart contract, wherein in step (a), (i) the first encoding algorithm of the first DApp of the first blockchain network When the specific data in data format is encoded into raw bytes, a service call message containing the raw bytes corresponding to the specific data is sent to the first service control smart contract of the first blockchain network, (ii) A service message including the service call message is sent to the first message control smart contract of the first blockchain network by the first service control smart contract, and (iii) the first message control smart contract is sent to the first message control smart contract. When the blockchain communication message including the service message is generated, the relay generates the relay message including the blockchain communication message and the verification information, and in step (b), the relay generates the relay message is transmitted to the second blockchain network, causing the second blockchain network to (i) receive the relay message through the second message control smart contract, and (ii) the relay message included in the relay message. Verify the relay message using verification information, (iii) confirm the blockchain communication message included in the relay message, and (iv) send the service message included in the blockchain communication message to the second causes the service control smart contract to receive, (v) causes a call message notifying that the service message has arrived by the second service control smart contract to be sent to the second DApp of the second blockchain network, and (vi) the Cause an execution call message requesting the raw bytes corresponding to the specific data to be sent by a second DApp to the second service control smart contract, and (vii) correspond to the specific data by the second service control smart contract. causing a handle call message containing the raw bytes to be sent to the second DApp, and supporting the raw bytes to be decoded into the specific data of the second data format by a second decoding algorithm of the second DApp, A method is provided.

As an example, in step (a), (ii) the service message including the service call message is transmitted by the first service control smart contract to the first message control smart contract of the first blockchain network. To do this, the first DApp requests a relay-related fee for transmitting the raw bytes corresponding to the specific data to the user of the first DApp, and in step (b), (vi) the second DApp Receiving the specific data from the second DApp to the user of the second DApp so that the execution call message requesting the raw bytes corresponding to the specific data is transmitted to the second service control smart contract. A method is provided to request a relay-unrelated fee for

As an example, the first service control smart contract and the second service control smart contract are each configured to call a smart contract method of a blockchain network other than the blockchain network to which they belong, and the first block A method is provided, characterized in that the first data format of the chain network and the second data format of the second blockchain network are managed without knowledge.

As an example, a method is provided in which the service call message further includes rollback information, which is information for restoring the specific data to a state before transmission when an error occurs.

As an example, the blockchain communication message may include a source address that is the blockchain address of the first message control smart contract that generated the blockchain communication message, and a block of the second message control smart contract that receives the blockchain communication message. A method is provided, including a destination address that is a chain address, a service type that identifies the type of service of the service message, a serial number that can identify the blockchain communication message, and the service message.

As an example, in step (a), (i) if the specific data of the first data format is encoded into raw bytes by the first encoding algorithm of the first DApp of the first blockchain network, the specific data The service call message containing the raw bytes corresponding to data is sent to the first service control smart contract of the first blockchain network, and (ii) the first service control smart contract receives the service call message. If so, the first DApp responds with a serial number for identification of the service call message, generates the service message including the service call message, generates a transmission service message including the service message, and transmits the service message. transmitting a service message to the first message control smart contract of the first blockchain network; (iii) receiving the transmitted service message from the first message control smart contract of the first blockchain network; When generating the blockchain communication message containing and generating a blockchain event message containing the blockchain communication message, the relay sends the blockchain communication message and the verification information included in the blockchain event message. A method for generating the relay message using the above-mentioned relay message is provided.

As an example, the transmission service message includes a destination network address that is information about the network address of the second blockchain network that receives the service message, a service type that identifies the type of service of the service message, and identification of the transmission service message. A method is provided, including a serial number, and the service message.

As an example, the blockchain event message includes a destination address that is information about a blockchain address regarding the second message control smart contract of the second blockchain network through which the blockchain communication message is delivered, the first blockchain network A method is provided, including the serial number, which is information for identifying the service call message, and the blockchain communication message.

As an example, in step (b), the relay transmits a handle relay message including the relay message to the second blockchain network, causing the second blockchain network to: (i) send the second message (ii) receive the handle relay message through a control smart contract, (ii) generate a verification handle relay message including the relay message and transmit it to the second message verification smart contract of the second blockchain network, When the verification handle relay message is received by the second message verification smart contract, verify the verification information included in the relay message, and (iii) verify the second message verification smart contract by the second message control smart contract. When it is confirmed that the verification of the relay message is successful, the blockchain communication message included in the relay message is confirmed, and (iv) a handle service message including the service message included in the blockchain communication message is sent. generate and receive the second service control smart contract; (v) when the handle service message is received by the second service control smart contract, check the service message included in the handle service message, and A call message notifying that a message has arrived is sent to the second DApp of the second blockchain network, and (vi) when the call message is detected by the second DApp, the raw bytes corresponding to the specific data are requested. cause an execution call message to be sent to the second service control smart contract, and (vii) when the execution call message is received by the second service control smart contract, a handle containing the raw bytes corresponding to the specific data. A method is provided, allowing a call message to be sent to the second DApp, and supporting the raw bytes to be decoded into the specific data of the second data format by a second decoding algorithm of the second DApp.

As an example, the verification handle relay message includes: a blockchain address of the second message control smart contract that receives the handle relay message; a blockchain address of the first message control smart contract that generated the blockchain communication message; A method is provided, comprising a serial number that can identify a verification handle relay message, and the relay message.

As an example, the handle service message includes a network address of the first blockchain network that transmitted the service message, a service type that identifies the type of service of the service message, a serial number that can identify the handle service message, and the service message.

As an example, the call message may include a source address that is a blockchain address on the first blockchain network of the account sending the specific data in the first blockchain network, and the second block of the account receiving the call message. Destination address, which is a blockchain address on the chain network, a serial number, which is information for identifying the service call message in the first blockchain network, identification information for identifying a request for transmitting the data in the second blockchain network, and a method comprising the specific data.

According to another aspect of the present invention, a relay for transmitting specific data of unknown data format from a first blockchain network to a second blockchain network, comprising: at least one memory storing instructions; and at least one processor configured to execute the instructions, wherein the processor is configured to: (I) connect from the first blockchain network conforming to a first data format to the second blockchain network conforming to a second data format; A process of generating a relay message including the blockchain communication message and verification information when the creation of a blockchain communication message for transmitting the specific data is detected; and (II) transmitting the relay message to the second blockchain network, causing the second blockchain network to verify the relay message using the verification information included in the relay message, and A relay is provided, characterized in that it performs a process of converting the specific data included in the second data format and transmitting it to the recipient.

As an example, prior to the (I) process, (I-0) the processor deploys a first service control smart contract and a first message control smart contract to the first blockchain network and to the second blockchain network. Further performing a process of deploying a second service control smart contract and a second message control smart contract, wherein in the process (I), (i) the first encoding algorithm of the first DApp of the first blockchain network is used. When the specific data of a first data format is encoded into raw bytes, a service call message containing the raw bytes corresponding to the specific data is sent to the first service control smart contract of the first blockchain network, ( ii) a service message including the service call message is sent to the first message control smart contract of the first blockchain network by the first service control smart contract, and (iii) to the first message control smart contract When the blockchain communication message including the service message is generated, the processor generates the relay message including the blockchain communication message and the verification information, and in the process (II), the processor Transmit a relay message to the second blockchain network, causing the second blockchain network to: (i) receive the relay message through the second message control smart contract, and (ii) be included in the relay message Verify the relay message using the verification information provided, (iii) Verify the blockchain communication message included in the relay message, (iv) Verify the service message included in the blockchain communication message causes the second service control smart contract to receive, (v) causes a call message notifying that the service message has arrived by the second service control smart contract to be sent to the second DApp of the second blockchain network, (vi ) Cause an execution call message requesting the raw bytes corresponding to the specific data to be sent by the second DApp to the second service control smart contract, (vii) send the specific data to the second service control smart contract A handle call message containing the raw byte corresponding to is sent to the second DApp, and the raw byte is decoded into the specific data in the second data format by a second decoding algorithm of the second DApp. A relay is provided.

As an example, in the process (I), (ii) the service message including the service call message is transmitted by the first service control smart contract to the first message control smart contract in the first blockchain network. To do this, the first DApp requests a relay-related fee for transmitting the raw bytes corresponding to the specific data to the user of the first DApp, and in the process (II), (vi) the second DApp Receiving the specific data from the second DApp to the user of the second DApp so that the execution call message requesting the raw bytes corresponding to the specific data is transmitted to the second service control smart contract. A relay is provided, requesting a non-relay related fee.

As an example, the first service control smart contract and the second service control smart contract are each configured to call a smart contract method of a blockchain network other than the blockchain network to which they belong, and the first block A relay is provided, characterized in that it is managed without knowledge of the first data format of the chain network and the second data format of the second blockchain network.

As an example, a relay is provided in which the service call message further includes rollback information, which is information for restoring the specific data to the state before transmission when an error occurs.

As an example, the blockchain communication message may include a source address that is the blockchain address of the first message control smart contract that generated the blockchain communication message, and a block of the second message control smart contract that receives the blockchain communication message. A relay is provided, including a destination address that is a chain address, a service type that identifies the type of service of the service message, a serial number that identifies the blockchain communication message, and the service message.

As an example, in the process (I), if (i) the specific data of the first data format is encoded into raw bytes by the first encoding algorithm of the first DApp of the first blockchain network, the specific data The service call message containing the raw bytes corresponding to data is sent to the first service control smart contract of the first blockchain network, and (ii) the first service control smart contract receives the service call message. If so, the first DApp responds with a serial number for identification of the service call message, generates the service message including the service call message, generates a transmission service message including the service message, and transmits the service message. transmitting a service message to the first message control smart contract of the first blockchain network; (iii) receiving the transmitted service message from the first message control smart contract of the first blockchain network; When generating the blockchain communication message including the blockchain communication message and generating the blockchain event message including the blockchain communication message, the processor generates the blockchain communication message and the verification information included in the blockchain event message. A relay is provided that generates the relay message using a relay.

As an example, the transmission service message includes a destination network address that is information about the network address of the second blockchain network that receives the service message, a service type that identifies the type of service of the service message, and identification of the transmission service message. A relay is provided, including a capable serial number, and the service message.

As an example, the blockchain event message includes a destination address that is information about a blockchain address regarding the second message control smart contract of the second blockchain network through which the blockchain communication message is delivered, the first blockchain network A relay is provided, including the serial number, which is information for identifying the service call message, and the blockchain communication message.

As an example, in process (II), the processor transmits a handle relay message including the relay message to the second blockchain network, causing the second blockchain network to: (i) send the second message (ii) receive the handle relay message through a control smart contract, (ii) generate a verification handle relay message including the relay message and transmit it to the second message verification smart contract of the second blockchain network, When the verification handle relay message is received by the second message verification smart contract, verify the verification information included in the relay message, and (iii) verify the second message verification smart contract by the second message control smart contract. When it is confirmed that the verification of the relay message is successful, the blockchain communication message included in the relay message is confirmed, and (iv) a handle service message including the service message included in the blockchain communication message is sent. generate and receive the second service control smart contract; (v) when the handle service message is received by the second service control smart contract, check the service message included in the handle service message, and A call message notifying that a message has arrived is sent to the second DApp of the second blockchain network, and (vi) when the call message is detected by the second DApp, the raw bytes corresponding to the specific data are requested. cause an execution call message to be sent to the second service control smart contract, and (vii) when the execution call message is received by the second service control smart contract, a handle containing the raw bytes corresponding to the specific data. A relay is provided that causes a call message to be sent to the second DApp and supports the raw bytes to be decoded into the specific data in the second data format by a second decoding algorithm of the second DApp.

As an example, the verification handle relay message includes: a blockchain address of the second message control smart contract that receives the handle relay message; a blockchain address of the first message control smart contract that generated the blockchain communication message; A relay is provided, containing the relay message, and a serial number identifying the verification handle relay message.

As an example, the handle service message includes a network address of the first blockchain network that transmitted the service message, a service type that identifies the type of service of the service message, a serial number that can identify the handle service message, and a relay containing the service message is provided.

As an example, the call message may include a source address that is a blockchain address on the first blockchain network of the account sending the specific data in the first blockchain network, and the second block of the account receiving the call message. Destination address, which is a blockchain address on the chain network, a serial number, which is information for identifying the service call message in the first blockchain network, identification information for identifying a request for transmitting the data in the second blockchain network, and a relay containing the specific data.

The present invention has the effect of providing a method of transmitting specific data whose format is unknown in a relay from a first blockchain network to a second blockchain network through the relay.

Additionally, the present invention has the effect of allowing each smart contract distributed in each blockchain network to call a method of a smart contract of another blockchain to which it does not belong.

In addition, the present invention transmits a message in the form of raw bytes from the first blockchain network to the second blockchain network through a relay, and allows the user to process the delivered message through the decoding algorithm of the DApp of the second blockchain network. , it has the effect of ensuring that the relay transaction cost can be predicted at a certain level regardless of the method being called.

Figure 1 is a diagram showing a schematic configuration of an entire system capable of transmitting and receiving specific data between blockchains according to an embodiment of the present invention.
Figure 2 is a diagram illustrating an example of a schematic arrangement of nodes in the entire system according to an embodiment of the present invention.
Figure 3 is a flowchart showing the process of communication in a system capable of transmitting and receiving specific data between blockchains of the present invention.
Figure 4 is a flowchart showing the process of transmitting specific data in the first blockchain network of the system of the present invention.
Figure 5 is a flowchart showing the process of relaying specific data in the relay of the system of the present invention.
Figure 6 is a flowchart showing the process of transmitting specific data to the final destination in the second blockchain network of the system of the present invention.
Figure 7 is a flowchart showing the process of handling an error in the system of the present invention.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, various changes can be made to the embodiments, so the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes for the embodiments are included in the scope of rights.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiments, if it is determined that detailed descriptions of related known technologies may unnecessarily obscure the gist of the embodiments, the detailed descriptions are omitted.

Additionally, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be directly connected or connected to that other component, but there is no need for another component between each component. It should be understood that may be “connected,” “combined,” or “connected.”

Components included in one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description given in one embodiment may be applied to other embodiments, and detailed description will be omitted to the extent of overlap.

Below, a system and method for transmitting data between blockchains according to an embodiment of the present invention will be described in detail with reference to the attached FIGS. 1 to 7.

Figure 1 is a diagram showing a schematic configuration of an entire system capable of transmitting and receiving data between blockchains according to an embodiment of the present invention.

Referring to FIG. 1, the entire system of the present invention may be configured to include a first blockchain network 110, a second blockchain network 130, and a relay 120.

The first blockchain network 110 can support the operation of the first DApp 111, the first service control smart contract 112, the first message control smart contract 114, and the first message verification smart contract 116. there is.

The second blockchain network 130 can support the operations of the second DApp 131, the second service control smart contract 132, the second message control smart contract 134, and the second message verification smart contract 136. there is.

At this time, DApp may be an application responsible for interfacing with users in each blockchain network.

Additionally, DApps can perform encoding and decoding of data depending on the format of the data being transmitted or received.

Looking at an example of transmitting data from the first blockchain network 110 to the second blockchain network 130, it can operate as follows. Here, it is assumed that specific data is transmitted from the first blockchain network 110 that follows the first data format to the second blockchain network 130 that follows the second data format, and the relay 120 is 1 It should be noted that the first data format of the blockchain network 110 and/or the second data format of the second blockchain network 130 are not known. In addition, in the present invention, the “relay 120” may be a relay itself in the narrow sense, but may also be interpreted as a broad term meaning a certain entity (e.g., an operating device that manages the relay) that is linked to the relay. there is. The relay 120 can be divided into an entity that manages the contract and an entity that performs the relay, but is not limited to this.

When a service call message containing data transmitted from the first blockchain network 110 to the second blockchain network 130 is obtained, the first blockchain network 110 provides the service call message and the service call message. You can create a service message containing information and create a blockchain communication message containing the service message.

When the relay 120 detects the creation of a blockchain communication message while monitoring the first blockchain network 110, it provides verification information 146 that can verify the blockchain communication message from the first blockchain network 110. can be obtained, generate a relay message including a blockchain communication message and verification information 146, and transmit the relay message to the second blockchain network 130 including the destination of the message.

At this time, the verification information 146 refers to a series of data that can prove that the blockchain communication message belongs to a specific block in the blockchain. Additionally, verification information 146 may be defined differently for each blockchain.

A representative example of the verification information 146 may be data connected to the end of a Merkle Tree connected from the block header, and to prove this, the data of all entities connected from the root must be verified as verification information. (146), or the hash value of the Siblings can be used as verification information (146).

Meanwhile, as another example of the verification information 146, MPT (Merkle Patricia Tree) can be used and the verification information 146 can be verified with data of a connected entity. Verification information 146 can be obtained by calling an application program interface (API) from a specific account with the key value of the data.

When the second blockchain network 130 receives the relay message, it verifies the relay message using the verification information 146 included in the relay message, and sends the data included in the relay message to the recipient through the second DApp 131. can be sent to.

More specifically, the relay 120 distributes the first service control smart contract and the first message control smart contract to the first blockchain network 110 and the second service control smart contract to the second blockchain network 130. By distributing the contract and the second message control smart contract, etc., an important feature of the present invention described below (i.e., the relay 120 can transmit data between heterogeneous blockchains without any problem without knowing the first data format and the second data format). Prerequisites for the ability to transmit and receive) can be established.

In this state, (i) when the specific data in the first data format is encoded into raw bytes by the first encoding algorithm of the first DApp 111 of the first blockchain network 110, it corresponds to the specific data A service call message containing the raw bytes is sent to the first service control smart contract of a first blockchain network 110, and (ii) containing the service call message by the first service control smart contract. A service message is sent to the first message control smart contract of the first blockchain network 110, and (iii) when the blockchain communication message including the service message is generated by the first message control smart contract, Relay 120 will generate the relay message including the blockchain communication message and the verification information 146.

At this time, in (ii), in order to ensure that the service message including the service call message is transmitted by the first service control smart contract to the first message control smart contract of the first blockchain network 110, The first DApp 111 may request a first fee (so-called relay-related fee) for transmitting the raw bytes corresponding to the specific data from the user of the first DApp 111.

Thereafter, the relay 120 transmits the relay message to the second blockchain network 130, causing the second blockchain network 130 to: (i) transmit the relay message through the second message control smart contract (ii) verify the relay message using the verification information 146 included in the relay message, (iii) verify the blockchain communication message included in the relay message, (iv) causing the second service control smart contract to receive the service message included in the blockchain communication message, and (v) sending a call message notifying that the service message has arrived by the second service control smart contract. 2 is transmitted to the second DApp 131 of the blockchain network 130, and (vi) an execution call message requesting the raw bytes corresponding to the specific data is sent by the second DApp 131 to the second DApp 131. (vii) cause a handle call message containing the raw bytes corresponding to the specific data to be transmitted to the second DApp 131 by the second service control smart contract, and The second decoding algorithm of the second DApp 131 may support decoding the raw bytes into the specific data of the second data format.

At this time, in (vi), in order to ensure that the execution call message requesting the raw bytes corresponding to the specific data is transmitted by the second DApp 131 to the second service control smart contract, the second The DApp 131 may request a second fee (so-called relay-unrelated fee) related to receiving the specific data from the user of the second DApp 131.

The first service control smart contract and the second service control smart contract are each configured to call a smart contract method of a blockchain network other than the blockchain network to which they belong, and are configured to call the smart contract method of the blockchain network other than the blockchain network to which they belong. It can be managed to link with the relay 120 without knowing about the first data format and the second data format of the second blockchain network.

Figure 2 is a diagram illustrating an example of a schematic arrangement of nodes in a system according to an embodiment of the present invention.

Referring to Figure 2, the system of the present invention includes a first blockchain network 110 including a plurality of nodes 211 to 215, a second blockchain network 130 including a plurality of nodes 231 to 234, and It may be configured to include a relay 120 that relays communication between the first blockchain network 110 and the second blockchain network 130.

At this time, the relay 120 may include a node 214 of the first blockchain network 110 and a node 232 of the second blockchain network 130.

That is, the node 214 may be included in both the first blockchain network 110 and the relay 120, and the node 232 may be included in both the second blockchain network 130 and the relay 120. It can be configured.

In another method, the relay 120 does not include a node and is configured to communicate with at least one node of the first blockchain network 110 and communicate with at least one node of the second blockchain network 130. It could be.

A more specific example of data transmission and reception between blockchains will be described in more detail later with reference to FIGS. 3 to 7.

Figure 3 is a flowchart showing the process of communication in a system capable of transmitting and receiving data between blockchains of the present invention.

Referring to FIG. 3, when a service call message containing data transmitted from the first blockchain network 110 to the second blockchain network 130 is received (300), the service call message and the service information of the service call message A service message containing a can be generated, and a blockchain communication message containing the service message can be generated (310). Step 310 will be described in more detail later with reference to FIG. 4 .

When the relay 120 monitoring the first blockchain network 110 detects the creation of a blockchain communication message, verification information 146 that can verify the blockchain communication message is received from the first blockchain network 110. Obtain, generate a relay message including a blockchain communication message and verification information 146, and transmit the relay message to the second blockchain network 130 including the destination of the message (320). Step 320 will be described in more detail later with reference to FIG. 5.

When a relay message is received from the second blockchain network 130, the relay message can be verified using the verification information 146 included in the relay message, and the data included in the relay message can be transmitted to the recipient (330) . Step 330 will be described in more detail later with reference to FIG. 6.

Figure 4 is a flowchart showing the process of transmitting data in the first blockchain network 110 of the system of the present invention.

Referring to FIG. 4, step 310 of FIG. 3 can be specifically performed through the following process.

When the first DApp 111 of the first blockchain network 110 receives specific data to be transmitted to the second blockchain network 130 from the user (410), it generates a service call message containing the specific data. Can (412).

At this time, the service call message may be composed of a destination address, which is the blockchain address of an account receiving specific data located in the second blockchain network 130, and specific data to be transmitted. Additionally, the service call message may optionally further include rollback information, which is information for restoring the specific data to the state before transmission when an error occurs.

When the user provides specific data to be transmitted through the first DApp 111 to the first service control smart contract 112 using a service call message, the first DApp 111 provides the user with a request for transmitting the specific data. 1 A fee may be requested.

When the first service control smart contract 112 receives a service call message from the first DApp 111, it responds to the first DApp 111 with a serial number for identification of the service call message and includes the service call message. A service message can be created (414).

The service message can be created including a service call message and a destination address, which is the blockchain address of the account receiving the service call message.

Alternatively, the service message may include a destination address that is the blockchain address of the account receiving the service call message, a message type that identifies the type of the service call message, and service information including detailed information on the service type. , and a source address that is a blockchain address of an account transmitting a service call message.

At this time, the blockchain address is communication protocol identification information indicating that it is an address for blockchain communication, blockchain type information that distinguishes the type of blockchain network, and blockchain identification information that can identify the blockchain in the same type of blockchain network. , and may include account identification information that can identify a specific account in the blockchain network.

For example, the blockchain address may consist of “btp://0x3.iconee/hx1234~”.

Here, 'btp://' is communication protocol identification information indicating an address for blockchain communication, '0x3' is blockchain type information that distinguishes the type of blockchain network, and 'iconee' is the ID of the same blockchain network. This is blockchain identification information that can identify the blockchain by type, and 'hx1234~' is account identification information that can identify a specific account in the blockchain network.

And, the first service control smart contract 112 of the first blockchain network 110 may generate a transmission service message 142 including a service message (416).

At this time, the transmission service message 142 includes a destination network address, which is information about the network address of the second blockchain network 130 that receives the service message, a service type identifying the type of service of the service message, and a transmission service message 142 ) may include a serial number that can identify the device, and a service message.

And, the first service control smart contract 112 of the first blockchain network 110 can transmit the transmission service message 142 to the first message control smart contract 114 of the first blockchain network 110. There is (418).

Thereafter, when the first message control smart contract 114 of the first blockchain network 110 receives the transmission service message 142, it can check whether the creation of a blockchain communication message is possible (420).

If a blockchain communication message can be created as a result of the confirmation in step 420, the first message control smart contract 114 of the first blockchain network 110 can generate a blockchain communication message including a service message (422) ).

At this time, the blockchain communication message includes the source address, which is the blockchain address of the message control smart contract that generated the blockchain communication message, the destination address, which is the blockchain address of the message control smart contract that receives the blockchain communication message, and the service of the service message. It may include a service type that identifies the type, a serial number that identifies the blockchain communication message, and a service message.

The first message control smart contract 114 of the first blockchain network 110 adds the blockchain communication message to the first blockchain of the first blockchain network 100 (426).

And, the first message control smart contract 114 of the first blockchain network 110 generates a blockchain event message 144 including a blockchain communication message (428).

At this time, the blockchain event message 144 identifies the next destination address, the blockchain event message 144, which is information about the blockchain address regarding the message control smart contract of the next blockchain network through which the blockchain communication message is delivered, and It may include serial information that can confirm the order, and a blockchain communication message changed in bytes.

If, as a result of the confirmation in step 420, the creation of a blockchain communication message is not possible, the first message control smart contract 114 of the first blockchain network 110 may generate an error message (430). At this time, there may be cases where the creation of a blockchain communication message is not possible, for example, when the destination blockchain network is not confirmed.

And, the first message control smart contract 114 of the first blockchain network 110 may add an error message to the first blockchain of the first blockchain network 110 (432).

Figure 5 is a flowchart showing the process of relaying specific data in the relay of the system of the present invention.

Referring to FIG. 5, step 320 of FIG. 3 can be specifically performed through the following process.

When the relay 120, which monitors the first blockchain network 110, detects the creation of a blockchain event message 144 containing a blockchain communication message (510), the relay 120 transmits the blockchain from the first blockchain network 110. Verification information 146 that can verify the communication message can be obtained (512).

The relay 120 may generate a relay message including a blockchain communication message and verification information 146 (514). At this time, the relay message may include at least one blockchain communication message with the same network address, and verification information 146 of the blockchain communication message.

The relay 120 may generate a handle relay message 152 including a relay message in the relay and transmit it to the second message control smart contract 134 of the second blockchain network 130 (516).

At this time, the handle relay message 152 may include the blockchain address of the message control smart contract that generated the blockchain communication message and a relay message converted to raw bytes.

Figure 6 is a flowchart showing the process of transmitting specific data to the final destination in the second blockchain network of the system of the present invention.

Referring to FIG. 6, step 330 of FIG. 3 can be specifically performed through the following process.

When the second message control smart contract 134 of the second blockchain network 130 receives the handle relay message 152 including the relay message from the relay 120 (610), the verification handle relay including the relay message A message 154 may be generated and transmitted to the second message verification smart contract 136 of the second blockchain network 130 (612).

At this time, the verification handle relay message 154 is the blockchain address of the message control smart contract that receives the handle relay message 152, the blockchain address of the first message control smart contract 114 that generated the blockchain communication message, and the blockchain address of the first message control smart contract 114 that generated the blockchain communication message. 1 Message control may include the address at which the smart contract 114 was executed, a serial number to identify the verification handle relay message 154, and the relay message converted to raw bytes.

When the verification handle relay message 154 is received from the second message verification smart contract 136 of the second blockchain network 130, the verification information 146 included in the relay message can be verified (614).

When the second message control smart contract 134 of the second blockchain network 130 confirms that verification of the relay message is successful through the second message verification smart contract 136, the blockchain communication message included in the relay message Confirm, check the service message included in the blockchain communication message, and generate a handle service message 156 including the service message to the second service control smart contract 132 of the second blockchain network 130. Can be transmitted (616).

At this time, the handle service message 156 includes the network address of the first blockchain network 110 that sent the service message, a service type identifying the type of service of the service message, and a series that can identify the handle service message 156. It may include a number, and a service message.

When the second message control smart contract 134 receives the handle service message 156, it checks the service message included in the handle service message 156 and sends a call message indicating that the service message has arrived to the second blockchain network ( It can be transmitted to the second DApp 131 of 130 (618). At this time, the call message includes a source address, which is the blockchain address of the account transmitting specific data in the first blockchain network 110, a destination address, which is the blockchain address of the account receiving the call message, and the first blockchain network ( 110) may include a serial number, which is information for identifying a service call message, identification information for identifying a request for transmitting the specific data in the second blockchain network 130, and specific data.

When the second DApp 131 detects a call message, it can transmit an execution call message requesting specific data to the second service control smart contract 132 (620). The execution call message may include identification information for identifying a request to transmit specific data in the second blockchain network 130.

In step 620, when the second DApp 131 transmits an execution call message requesting specific data to the second service control smart contract 132, the second DApp 131 sends a second request regarding receipt of specific data to the user of the second DApp 131. A fee may be requested.

When the second service control smart contract 132 receives an execution call message, it transmits a handle call message containing specific data to the second DApp 131, and the second DApp 131 sends a specific data included in the handle call message. Data can be provided to the user of the second DApp (131) (622). The handle call message may include a source address, which is the blockchain address of an account transmitting specific data in the first blockchain network 110, and specific data.

Figure 7 is a flowchart showing the process of processing when an error occurs in the system of the present invention.

Referring to Figure 7, when the first service control smart contract 112 detects that an error occurs in the transmission of a blockchain communication message (710), it sends a rollback message notifying the occurrence of an error to the first DApp 111. Can (712). At this time, the rollback message includes a serial number, which is information for identifying the service call message in the first blockchain network 110, rollback information, which is information for restoring the specific data to the state before transmission when an error occurs, and error information that caused the rollback. may include.

When the first DApp 111 receives the rollback message, it can transmit an execution rollback message requesting rollback information for rollback to the first service control smart contract 112 (714). At this time, the execution rollback message may include a serial number, which is information for identifying the service call message in the first blockchain network 110.

When the first service control smart contract 112 receives an execution rollback message, it can transmit a handle call message containing rollback information, which is information for restoring specific data to the state before transmitting it, to the first DApp 111. (716).

When the first DApp 111 receives the handle call message, it can return to the state before sending specific data using the rollback information included in the handle call message (718).

Additionally, the embodiments according to the present invention described above may be implemented in the form of program instructions that can be executed through various computer components and recorded on a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on the computer-readable recording medium may be specially designed and configured for the present invention, or may be known and usable by those skilled in the computer software field. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical recording media such as CD-ROMs and DVDs, and magneto-optical media such as floptical disks. , and hardware devices specifically configured to store and perform program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions include not only machine language code such as that created by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform processing according to the invention and vice versa.

In the above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , a person skilled in the art to which the present invention pertains can make various modifications and variations from this description.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and the scope of the patent claims described below as well as all modifications equivalent to or equivalent to the scope of the claims fall within the scope of the spirit of the present invention. They will say they do it.

Claims (26)

In the method of transmitting specific data whose format is unknown in the relay from the first blockchain network to the second blockchain network,
(a) When the creation of a blockchain communication message for transmitting the specific data from the first blockchain network conforming to the first data format to the second blockchain network conforming to the second data format is detected, the relay Generating a relay message including a blockchain communication message and verification information; and
(b) The relay transmits the relay message to the second blockchain network, causing the second blockchain network to verify the relay message using the verification information included in the relay message, converting the specific data included in the relay message into the second data format and transmitting it to a recipient;
How to include . According to paragraph 1,
Before step (a) above,
(a0) The relay distributes a first service control smart contract and a first message control smart contract to the first blockchain network and a second service control smart contract and a second message control smart contract to the second blockchain network. Further comprising the step of distributing,
In step (a) above,
(i) When the specific data of the first data format is encoded into raw bytes by the first encoding algorithm of the first DApp of the first blockchain network, a service call containing the raw bytes corresponding to the specific data a message is sent to the first service control smart contract of the first blockchain network, and (ii) a service message including the service call message is sent by the first service control smart contract to the first service control smart contract of the first blockchain network. It is transmitted to a first message control smart contract, and (iii) when the blockchain communication message including the service message is generated by the first message control smart contract, the relay transmits the blockchain communication message and the verification information. Generate the relay message containing,
In step (b) above,
The relay transmits the relay message to the second blockchain network, causing the second blockchain network to (i) receive the relay message through the second message control smart contract, and (ii) Verify the relay message using the verification information included in the relay message, (iii) verify the blockchain communication message included in the relay message, and (iv) verify the blockchain communication message included in the blockchain communication message. The service message is received by the second service control smart contract, and (v) a call message notifying that the service message has arrived is sent to the second DApp of the second blockchain network by the second service control smart contract. (vi) cause an execution call message requesting the raw bytes corresponding to the specific data to be sent by the second DApp to the second service control smart contract, (vii) the second service control smart contract So that a handle call message containing the raw bytes corresponding to the specific data is transmitted to the second DApp, and the raw bytes are converted to the specific data of the second data format by a second decoding algorithm of the second DApp. Supporting decoding into data,
method. According to paragraph 2,
In step (a), (ii) to cause the service message including the service call message to be transmitted by the first service control smart contract to the first message control smart contract of the first blockchain network, The first DApp requests a relay-related fee for transmitting the raw bytes corresponding to the specific data to the user of the first DApp,
In step (b), (vi) the execution call message requesting the raw bytes corresponding to the specific data is sent by the second DApp to the second service control smart contract, by the second DApp. Requesting a relay-unrelated fee for receiving the specific data from the user of the second DApp,
method. According to paragraph 3,
The first service control smart contract and the second service control smart contract are each configured to call a smart contract method of a blockchain network other than the blockchain network to which they belong, and are configured to call the smart contract method of the blockchain network other than the blockchain network to which they belong. Characterized in that the method is managed without knowledge of the first data format and the second data format of the second blockchain network. According to paragraph 2,
The service call message is,
The method further includes rollback information, which is information for restoring the specific data to the state before transmission when an error occurs. According to paragraph 2,
The blockchain communication message is,
A source address that is the blockchain address of the first message control smart contract that generated the blockchain communication message,
Destination address, which is the blockchain address of the second message control smart contract that receives the blockchain communication message,
A service type that identifies the type of service in the service message,
A serial number that can identify the blockchain communication message, and
The above service message
Method, including. According to paragraph 2,
In step (a) above,
(i) When the specific data of the first data format is encoded into raw bytes by the first encoding algorithm of the first DApp of the first blockchain network, including the raw bytes corresponding to the specific data The service call message is sent to the first service control smart contract of the first blockchain network, and (ii) when the first service control smart contract receives the service call message, the service is called by the first DApp. Responding with a serial number for identification of the message, generating the service message including the service call message, generating a transmission service message including the service message, and transmitting the transmission service message to the first blockchain network. transmits to the first message control smart contract, and (iii) upon receiving the transmitted service message from the first message control smart contract of the first blockchain network, generates the blockchain communication message including the service message. And, when a blockchain event message including the blockchain communication message is generated, the relay generates the relay message using the blockchain communication message and the verification information included in the blockchain event message. . In clause 7,
The transmitted service message is,
A destination network address, which is information about the network address of the second blockchain network receiving the service message,
A service type that identifies the type of service in the service message,
A serial number that identifies the outgoing service message, and
The above service message
Method, including. In clause 7,
The blockchain event message is,
Destination address, which is information about the blockchain address regarding the second message control smart contract of the second blockchain network through which the blockchain communication message is delivered,
The serial number, which is information for identifying the service call message in the first blockchain network, and
The blockchain communication message
Method, including. In clause 7,
In step (b) above,
The relay transmits a handle relay message including the relay message to the second blockchain network, causing the second blockchain network to: (i) send the handle relay message through the second message control smart contract (ii) generate a verification handle relay message including the relay message and transmit it to the second message verification smart contract of the second blockchain network, and verify the verification by the second message verification smart contract When a handle relay message is received, the verification information included in the relay message is verified, and (iii) verification of the relay message is successful through the second message verification smart contract by the second message control smart contract. If confirmed, confirm the blockchain communication message included in the relay message, and (iv) generate a handle service message containing the service message included in the blockchain communication message, so that the second service control smart contract (v) When the handle service message is received by the second service control smart contract, the service message included in the handle service message is confirmed, and a call message notifying that the service message has arrived is sent to the second service control smart contract. 2 so that it is transmitted to a second DApp of the blockchain network, and (vi) when the call message is detected by the second DApp, an execution call message requesting the raw bytes corresponding to the specific data is sent to the second service control. and (vii) when the execution call message is received by the second service control smart contract, a handle call message containing the raw bytes corresponding to the specific data is transmitted to the second DApp. and supporting the raw bytes to be decoded into the specific data of the second data format by a second decoding algorithm of the second DApp. According to clause 10,
The verification handle relay message is,
Blockchain address of the second message control smart contract that receives the handle relay message,
Blockchain address of the first message control smart contract that generated the blockchain communication message,
A serial number that can identify the verification handle relay message, and
the relay message
Method, including. According to clause 10,
The handle service message is,
Network address of the first blockchain network that transmitted the service message,
A service type that identifies the type of service in the service message,
A serial number that can identify the handle service message, and
The above service message
Method, including. According to clause 10,
The call message is,
A source address, which is a blockchain address on the first blockchain network of the account sending the specific data in the first blockchain network, and a destination, which is a blockchain address on the second blockchain network of the account receiving the call message. address,
A serial number, which is information for identifying the service call message in the first blockchain network,
Identification information for identifying a request to transmit the data in the second blockchain network, and
The specific data above
Method, including. In a relay that transmits specific data whose format is unknown from the first blockchain network to the second blockchain network,
at least one memory storing instructions; and
At least one processor configured to execute the instructions;
The processor, when (I) detects the creation of a blockchain communication message for transmitting the specific data from the first blockchain network conforming to a first data format to the second blockchain network conforming to a second data format, A process for generating a relay message including the blockchain communication message and verification information; and (II) transmitting the relay message to the second blockchain network, causing the second blockchain network to verify the relay message using the verification information included in the relay message, and A relay characterized in that performing a process of converting the specific data included in the second data format and transmitting it to the recipient. According to clause 14,
Prior to process (I) above,
(I-0) The processor distributes a first service control smart contract and a first message control smart contract to the first blockchain network and controls a second service control smart contract and a second message to the second blockchain network. Further perform the process of deploying the smart contract,
In process (I) above,
(i) When the specific data of the first data format is encoded into raw bytes by the first encoding algorithm of the first DApp of the first blockchain network, a service call containing the raw bytes corresponding to the specific data a message is sent to the first service control smart contract of the first blockchain network, and (ii) a service message including the service call message is sent by the first service control smart contract to the first service control smart contract of the first blockchain network. is transmitted to a first message control smart contract, and (iii) when the blockchain communication message including the service message is generated by the first message control smart contract, the processor sends the blockchain communication message and the verification information Generate the relay message containing,
In process (II) above,
The processor transmits the relay message to the second blockchain network, causing the second blockchain network to (i) receive the relay message through the second message control smart contract, and (ii) Verify the relay message using the verification information included in the relay message, (iii) verify the blockchain communication message included in the relay message, and (iv) verify the blockchain communication message included in the blockchain communication message. The service message is received by the second service control smart contract, and (v) a call message notifying that the service message has arrived is sent to the second DApp of the second blockchain network by the second service control smart contract. (vi) cause an execution call message requesting the raw bytes corresponding to the specific data to be sent by the second DApp to the second service control smart contract, (vii) the second service control smart contract So that a handle call message containing the raw bytes corresponding to the specific data is transmitted to the second DApp, and the raw bytes are converted to the specific data of the second data format by a second decoding algorithm of the second DApp. Supporting decoding into data,
relay. According to clause 15,
In the process (I), (ii) to cause the service message including the service call message to be transmitted by the first service control smart contract to the first message control smart contract of the first blockchain network, The first DApp requests a relay-related fee for transmitting the raw bytes corresponding to the specific data to the user of the first DApp,
In the process (II), (vi) the second DApp to cause the execution call message requesting the raw bytes corresponding to the specific data to be sent by the second DApp to the second service control smart contract. Requesting a relay-unrelated fee for receiving the specific data from the user of the second DApp,
relay. According to clause 16,
The first service control smart contract and the second service control smart contract are each configured to call a smart contract method of a blockchain network other than the blockchain network to which they belong, and are configured to call the smart contract method of the blockchain network other than the blockchain network to which they belong. A relay, characterized in that it is managed without knowledge of the first data format and the second data format of the second blockchain network. According to clause 15,
The service call message is,
The relay further includes rollback information, which is information for restoring the specific data to the state before transmission when an error occurs. According to clause 15,
The blockchain communication message is,
A source address that is the blockchain address of the first message control smart contract that generated the blockchain communication message,
Destination address, which is the blockchain address of the second message control smart contract that receives the blockchain communication message,
A service type that identifies the type of service in the service message,
A serial number that can identify the blockchain communication message, and
The above service message
Contains relay. According to clause 15,
In process (I) above,
(i) When the specific data of the first data format is encoded into raw bytes by the first encoding algorithm of the first DApp of the first blockchain network, including the raw bytes corresponding to the specific data The service call message is sent to the first service control smart contract of the first blockchain network, and (ii) when the first service control smart contract receives the service call message, the service is called by the first DApp. Responding with a serial number for identification of the message, generating the service message including the service call message, generating a transmission service message including the service message, and transmitting the transmission service message to the first blockchain network. transmits to the first message control smart contract, and (iii) upon receiving the transmitted service message from the first message control smart contract of the first blockchain network, generates the blockchain communication message including the service message. And, when a blockchain event message including the blockchain communication message is generated, the processor generates the relay message using the blockchain communication message and the verification information included in the blockchain event message. . According to clause 20,
The transmitted service message is,
A destination network address, which is information about the network address of the second blockchain network receiving the service message,
A service type that identifies the type of service in the service message,
A serial number that identifies the outgoing service message, and
The above service message
Contains relay. According to clause 20,
The blockchain event message is,
Destination address, which is information about the blockchain address regarding the second message control smart contract of the second blockchain network through which the blockchain communication message is delivered,
The serial number, which is information for identifying the service call message in the first blockchain network, and
The blockchain communication message
Contains relay. According to clause 20,
In process (II) above,
The processor transmits a handle relay message including the relay message to the second blockchain network, causing the second blockchain network to (i) send the handle relay message through the second message control smart contract. (ii) generate a verification handle relay message including the relay message and transmit it to the second message verification smart contract of the second blockchain network, and verify the verification by the second message verification smart contract When a handle relay message is received, the verification information included in the relay message is verified, and (iii) verification of the relay message is successful through the second message verification smart contract by the second message control smart contract. If confirmed, confirm the blockchain communication message included in the relay message, and (iv) generate a handle service message containing the service message included in the blockchain communication message, so that the second service control smart contract (v) When the handle service message is received by the second service control smart contract, the service message included in the handle service message is confirmed, and a call message notifying that the service message has arrived is sent to the second service control smart contract. 2 so that it is transmitted to a second DApp of the blockchain network, and (vi) when the call message is detected by the second DApp, an execution call message requesting the raw bytes corresponding to the specific data is sent to the second service control. and (vii) when the execution call message is received by the second service control smart contract, a handle call message containing the raw bytes corresponding to the specific data is transmitted to the second DApp. A relay that supports decoding the raw bytes into the specific data of the second data format by a second decoding algorithm of the second DApp. According to clause 23,
The verification handle relay message is,
Blockchain address of the second message control smart contract that receives the handle relay message,
Blockchain address of the first message control smart contract that generated the blockchain communication message,
A serial number that can identify the verification handle relay message, and
the relay message
Contains relay. According to clause 23,
The handle service message is,
Network address of the first blockchain network that transmitted the service message,
A service type that identifies the type of service in the service message,
A serial number that can identify the handle service message, and
The above service message
Contains relay. According to clause 23,
The call message is,
A source address, which is a blockchain address on the first blockchain network of the account sending the specific data in the first blockchain network, and a destination, which is a blockchain address on the second blockchain network of the account receiving the call message. address,
A serial number, which is information for identifying the service call message in the first blockchain network,
Identification information for identifying a request to transmit the data in the second blockchain network, and
The specific data above
Contains relay.

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