TWM607492U - System and server for cryptographic currency conversion on blockchain - Google Patents

Abstract

The invention discloses a system and server for cryptographic currency conversion on blockchain. The conversion system includes a client computer device, a server, and a blockchain network. The client computer device generates a cryptocurrency conversion data, the cryptocurrency conversion data includes a user signature data, a wallet address data and a conversion rate. The wallet address data corresponds to have the ETH. The server generates an order information according to the cryptocurrency conversion data, wherein the order information includes the cryptocurrency conversion data. The blockchain network has an exchange smart contract. The exchange smart contract converts the ETH corresponding to the wallet address data into a corresponding ERC20 cryptocurrency according to the conversion rate of the order information, and authentication and recording after the conversion is completed.

Description

Blockchain's cryptocurrency conversion system and server

The present invention relates to a conversion system, in particular to a cryptographic currency conversion system and server for blockchain.

Blockchain is a decentralized digital ledger that adopts a consensus algorithm, and the most widely known application of blockchain technology is cryptocurrency. Encrypted currency based on blockchain technology has the characteristics of decentralization and is not subject to the supervision of central banks of governments. At the same time, in principle, the record of cryptocurrency transactions is permanent and cannot be retrospectively modified, and can be verified and traceable. For example, a traditional decentralized transaction process is initiated by a party of the transaction, signed with its user's private key, and submitted the transaction content and its digital signature to the blockchain, which are verified and recorded by each node. In order to ensure security, the counterparty of the transaction usually does not wait for a confirmation (confirmation) to think that the transaction has been completed.

Generally speaking, to carry out the currency conversion of encrypted currencies on the blockchain, the user needs to place his private key and the currency to be converted on the currency exchange, and wait for the system according to the conversion rate and quantity set by the user. Match up. However, in the process of placing orders directly on the exchange and waiting for the system to match, if the conversion rate set by the user is always different from the conversion rate requested by the seller, it will often take a considerable amount of waiting time.

The purpose of the present invention is to provide a blockchain encryption currency conversion system and server. This new model is different from the traditional exchange method of placing orders on exchanges. It allows users to exchange Ether into ERC20 cryptocurrency in a simpler and faster way, which can effectively solve users’ order transactions and matchmaking on exchanges. waiting time.

The present invention proposes a blockchain encryption currency conversion system, which includes a user-side computer device, a server, and a blockchain network. The user-side computer device generates an encrypted currency conversion data, where the encrypted currency conversion data includes a user signature data, a wallet address data, and a conversion exchange rate, and the wallet address data corresponds to Ether. The server is coupled to the user-side computer device, and the server generates a purchase order information according to the encrypted currency conversion data, wherein the purchase order information includes the encrypted currency conversion data. The blockchain network is respectively coupled to the user-side computer device and the server. The blockchain network has a currency swap smart contract. The currency swap smart contract positions the wallet according to the conversion rate of the purchase order information. The ether corresponding to the address data is converted into a corresponding ERC20 encrypted currency, and authentication and recording are performed after the conversion is completed.

In addition, the present invention also proposes a blockchain-based encrypted currency conversion method. The method includes the following steps: a user-side computer device generates an encrypted currency conversion data, wherein the encrypted currency conversion data includes a user signature data, A wallet address data and a conversion exchange rate, the wallet address data corresponds to Ether; a server generates a purchase order information based on the encrypted currency conversion data, where the purchase order information includes the encrypted currency conversion data; and A currency swap smart contract of a blockchain network converts the ether corresponding to the wallet address data into a corresponding ERC20 cryptocurrency according to the conversion rate of the purchase order information, and performs authentication and verification after the conversion is completed. recording.

In one embodiment, the encrypted currency conversion data further includes a conversion currency and a conversion quantity, and the conversion currency is the ERC20 encrypted currency.

In one embodiment, the server generates a user interface in the user-side computer device based on the encrypted currency conversion data, and the user interface includes the balance of the ether corresponding to the wallet address data, and the conversion Currency and the conversion rate.

In one embodiment, the user interface further includes the balance of the ERC20 encrypted currency.

In one embodiment, the server or the seller who owns the ERC20 encrypted currency determines the conversion rate.

In one embodiment, the user interface further allows a user to input the conversion amount.

In one embodiment, the currency swap smart contract converts the ether into another corresponding ERC20 encrypted currency, and then matches and mixes it on the blockchain network according to the conversion rate to encrypt the other ERC20 The currency is converted into the corresponding ERC20 encrypted currency.

In one embodiment, the blockchain network or the server sends a conversion success message to the client computer device and/or the seller of the ERC20 encrypted currency.

In the encrypted currency conversion system and server disclosed in the present invention, the purchase order information is generated based on the encrypted currency conversion data generated by the user-side computer device, so that the currency exchange smart contract can use the wallet address according to the conversion rate of the purchase order information The Ether corresponding to the data is paired and combined with the seller to convert it into the corresponding ERC20 encrypted currency. After the conversion is completed, the conversion transaction will be authenticated and recorded on the blockchain network. In this way, users can exchange Ether into ERC20 cryptocurrency in a simpler and faster way. They don’t need to place orders on the exchange and wait for matching. Therefore, it can effectively solve the problem of users’ placing orders and trading on the exchange by themselves. Matching waiting time.

Hereinafter, referring to related drawings, the encryption currency conversion system and server of the blockchain according to various embodiments provided by the present invention will be described. Among them, the same elements will be described with the same reference signs.

Unless otherwise defined, the meanings of all technical and scientific terms used in this article are equivalent to having the same meaning as the general meaning understood by a person with ordinary knowledge in the technical field to which the present invention belongs. It should be understood that the terms used herein are only for describing specific embodiments and are not limiting.

It should be noted that all the directional indicators (such as up, down, left, right, front, back,...) in the various embodiments of the present invention are only used to explain in a specific posture (as shown in the attached drawings ) The relative positional relationship, movement situation, etc. between the various components under the following, if the specific posture changes, the directional indication will also change accordingly.

The term "blockchain" in this article refers to the transaction records that are built on a peer-to-peer (P2P) network system and are encrypted and connected in series by cryptography (each record is also called a "block (block) )”). Each block includes the encrypted hash string, time stamp and transaction data of the previous block. In addition to using the above-mentioned P2P network architecture, blockchain technology also uses asymmetric encryption technology (public key-private key pair), distributed ledger, and authentication mechanism based on consensus algorithms. It makes the block content difficult to be tampered with, and has verifiability and traceability. Therefore, when a currency or goods ownership transfer transaction is to be carried out, it can be initiated directly by one party, and it can be completed without any financial institution or third-party institution in the middle, so it has the characteristics of decentralization. Currently commonly used in digital currency or cryptocurrency transactions. In a blockchain network based on the P2P network architecture, each computer (also called a "node") in the network has the same network computing rights, and the network computing rights may vary by different blocks. The consensus algorithm of the chain is different.

The term "cryptocurrency" in this article refers to a transaction medium that uses blockchain technology's asymmetric encryption, decentralized ledger, consensus calculation and authentication mechanism and other technologies to ensure transaction security and control transaction units. The cryptocurrency in this article is a digital currency, which can include ERC20 cryptocurrency and non-ERC20 cryptocurrency: for example, Ethereum (ETH). Among them, the ERC20 encrypted currency is, for example, but not limited to SBT, BNB, MKR, BAT, CRO, VEN, USDC, REP, OMG, TUSD, HOT, LINK, PAX, ZRX, ICX, ZIL, ... or other encrypted currencies (details can be Reference: https://etherscan.io/tokens webpage). The cryptocurrency conversion system and method in this article is one of converting Ether into ERC20 cryptocurrency.

The terms "wallet" and "wallet address" in this article refer to the address corresponding to the cryptocurrency used for exchange on the blockchain, and the currency settlement (and currency balance) corresponding to the address is recorded. It uses the user's or owner's private key to perform elliptic curve calculations (such as secp256k1), hash function calculations (such as SHA-256), and encoding (such as BASE58) to obtain a string sequence of English letters and numbers ( For example, 0x80a956Ab640Ee8A6E336C9a954bB55f422e3Ac6e). The wallets used by transactions on the blockchain can be formed using, for example, asymmetric encryption, in which each wallet has its own unique pair of public and private keys. The public key of each wallet can openly allow each node to identify the wallet (for example, transfer encrypted currency to the wallet address), but the private key is unique to the owner of the wallet and is used to sign the transaction Chapter (for example, to allow nodes to verify whether the transaction is true).

The term "smart contract" or "smart contract" refers to a contract defined in digital form. It is a computer protocol written in a programming language. When used on a blockchain, such as the Ethereum blockchain, its It represents a computer protocol that is transmitted through the network and can be verified and automatically executed by computers (miners, netizens) on the blockchain. Smart contracts (smart contracts) do not require the existence of third parties or intermediaries, and can also conduct transactions that can be verified, traced and irreversible. For example, when both parties to a transaction write a smart contract in Solidity language based on the ERC20 Token Standard, and deploy it on the Ethereum blockchain (hereinafter referred to as the Ethereum chain) and use the Ethereum virtual machine (Ethereum virtual machine, EVM) operation, the computer on the Ethernet chain will have a signal related to the contract (or "event", for example, the transfer time specified in the contract, or one party has transferred When the transaction item is delivered to the other party), the corresponding action is executed according to the content of the contract (for example, withdrawal and transfer from a wallet address). Deploying and executing smart contracts on the Ethereum chain requires additional calculation fees, which are called "fuel/gas", and "fuel/gas" can be purchased with Ether. Similarly, in response to specific events on the Ethereum chain to execute the corresponding actions in the smart contract, consensus encryption and decryption algorithms are also adopted. A smart contract successfully deployed on the Ethereum chain will also have a dedicated address, such as "0x03f8a79ccf94611a512b63d42f5fc3eacf59d3", a string sequence that includes English letters and numbers.

Several exemplary embodiments of this document will be described below.

Fig. 1 is a schematic diagram of a blockchain encryption currency conversion system according to an embodiment of the new type. As shown in FIG. 1, the encrypted currency conversion system of this embodiment includes a user-side computer device 1, a server 2 and a blockchain network 3.

The user-side computer device 1 can be, for example, a mobile device, a notebook computer, a desktop computer, a network-connectable device (such as a smart home appliance, a smart watch), or other computer devices, etc., without limitation. The user-side computer device 1 can accept user input and send the input data to the server 2 to generate corresponding actions.

The server 2 is coupled to the user-side computer device 1, and the coupling method may include, but is not limited to, a wireless network connection or a wired network connection. The server 2 may include a memory unit and a processing unit. The memory unit can store instructions (such as program codes) executable by the processing unit. The processing unit may be a core control component of the server 2 and, for example, includes a central processing unit (CPU) and/or other control hardware, software, or firmware.

The blockchain network 3 is coupled to the server 2. The blockchain network 3 includes multiple computers (or nodes/nodes), and the number is unlimited. Although Fig. 1 shows a blockchain network 3 composed of 7 computers/nodes, including computers 31~37, its purpose is only to give an exemplary explanation and not to impose any restriction on this article. In addition, the user-side computer device 1 can also be coupled to the blockchain network 3, for example, to the computer 31 in the blockchain network 3 in a wireless or wired manner, and then to the entire blockchain network 3. Or, the user-side computer device 1 can also become a node in the blockchain network 3, and then become a part of the blockchain network 3.

In this embodiment, when the user wants to convert the Ether in his wallet into ERC 20 encrypted currency, the server 2 can generate (display) a user interface for currency conversion in the user-side computer device 1. For the user to perform cryptocurrency conversion operations; alternatively, the user-side computer device 1 can also download and execute the currency conversion application program, and then generate a currency conversion user interface on the user-side computer device 1.

For example, when a user wants to convert ETH encrypted currency (non-ERC 20 encrypted currency) in his wallet into SBT encrypted currency (ERC 20 encrypted currency), the user can use the user-side computer device 1 to The server 2 sends a currency conversion application and sends an encrypted currency conversion data corresponding to the conversion application, where the encrypted currency conversion data includes a wallet address data that the user wants to use for currency conversion (that is, using The wallet address to be used for conversion) and a user signature data (that is, the user’s digital signature for the conversion). In addition, the aforementioned encrypted currency conversion information may further include the conversion rate, the conversion currency (ERC20 encrypted currency, such as SBT), and the conversion amount (the amount to convert ETH to SBT).

The aforementioned wallet address data is derived from the user’s private key and/or the server 2’s private key, and from the computer (such as the user’s computer device 1, server 2, or other third-party computer devices). There is no limitation here.) Carry out the elliptic curve calculation, hash function calculation and coding as mentioned above. In addition, the aforementioned user signature data (ie, the user's digital signature of the transaction) is also generated by the user-side computer device 1 using the user's private key to perform asymmetric encryption and other operations. If it is based on security considerations, the user's private key may not be sent to the server 2. When the wallet address corresponding to the pen conversion is generated, the user-side computer device 1 uses the user's private key. The key performs elliptic curve calculation, hash function calculation, and coding.

Then, after the server 2 receives the above-mentioned encrypted currency conversion data, it will query the nodes 31-37 of the blockchain network 3 to obtain the wallet recorded in the blockchain record according to the wallet address data The balance of the cryptocurrency corresponding to the address. After that, a user interface for encrypted currency conversion is generated on the user-side computer device 1. The server 2 can generate the user interface on the user-side computer device 1 according to the encrypted currency conversion data, including the balance of the ether (ETH) corresponding to the wallet address data, the conversion exchange rate, and the conversion currency .

The following is an example of a user interface generated by the server 2 on the user-side computer device 1 based on the encrypted currency conversion data provided by the user. The content of the user interface below is only for exemplary description, and does not impose any limitation on this article. ETH in wallet address: 0.523 SBT in wallet address: 0 SBT conversion rate: 0.0000354585 ETH Number of SBT conversions: 8 Total need: 0.000283668 ETH

The above user interface not only displays the balance of the corresponding ether (ETH) in the wallet address (for example, 0.523), and the balance of the corresponding ERC20 cryptocurrency (SBT) in the wallet address (for example, 0), but also includes There is a conversion rate (0.0000354585).

In some embodiments, the user interface may not include the corresponding ERC20 cryptocurrency (SBT) balance in the wallet address; in some embodiments, the server 2 or the seller who owns the ERC20 cryptocurrency (SBT) can decide The conversion rate; in some embodiments, the conversion rate may be a fixed rate or a variable rate; in some embodiments, the conversion rate may be automatically updated for a period of time (for example, once an hour), or manually updated by the seller, The present model is not restricted.

In addition, the aforementioned user interface can further allow the user to input the conversion quantity. After the user enters the desired conversion quantity, for example, when entering 8, the "Total Needs: 0.000283668 ETH" can be generated immediately. After the user confirms the delivery, the server 2 can generate a purchase order information based on the user's encrypted currency conversion data (Order information). The user-side computer device 1 can transmit the transaction information to the currency exchange smart contract in the blockchain network 3. Among them, the purchase order information includes the encrypted currency conversion data (that is, the above-mentioned user signature data, wallet address data, conversion currency, conversion exchange rate, and conversion quantity). The aforementioned currency swap smart contract is a smart contract of the Ethereum imitation protocol, which can be a 0x smart contract ("zero x" contract). The 0x smart contract can convert the user's wallet address data according to the conversion rate of the purchase order information. Ether (ETH) is converted into the corresponding ERC20 encrypted currency (SBT), and after the conversion is completed, each node 31-37 performs the corresponding verification and recording of the conversion transaction on the blockchain (that is, on the chain) . In this way, each node 31-37 of the blockchain network 3 will authenticate and perform authentication based on the user signature data, wallet address data, conversion currency, conversion exchange rate, and conversion quantity included in the conversion transaction. recording.

In detail, each node 31-37 will use the public key corresponding to the wallet address to decrypt the user's digital signature data for authentication. Only after confirming that the digital signature data of the user's digital signature data is true, will the converted content data and the seller counterparty data be encrypted and encoded according to the 0x smart contract to connect them as a new block. (I.e. record) on the existing blockchain to complete the conversion transaction. In addition, when recording the content of the conversion transaction, each node 31-37 will also incorporate the time stamp corresponding to the conversion into the new block, making it difficult for the newly added block content to be included. Tampering, with verifiability and traceability.

The aforementioned 0x smart contract converts Ether (ETH) into a corresponding amount (such as 8) of ERC20 cryptocurrency (SBT) according to the aforementioned conversion rate (such as 0.0000354585). In this embodiment, the 0x smart contract first converts Ether (ETH) into another corresponding ERC20 encrypted currency, and then matches and mixes according to the conversion rate to convert the other ERC20 encrypted currency (WETH) Into the corresponding ERC20 cryptocurrency (SBT).

In detail, still taking the above-mentioned user interface example to illustrate, the conversion process can include the following: (1) The 0x smart contract transfers 0.000283668 ETH encrypted currency from the user's wallet address to the 0x smart contract position (2) The 0x smart contract converts the received ETH cryptocurrency at a ratio of 1:1 (equivalent conversion) into another ERC20 cryptocurrency (intermediary currency, WETH); (3), 0x smart contract from The seller’s wallet address transfers 8 SBT cryptocurrencies; (4) 0x smart contract transfers 0.000283668 WETH cryptocurrency to the seller’s wallet address; and (5) 0x smart contract transfers 8 SBT cryptocurrencies into the seller’s wallet address To the user's wallet address. Among them, the reason why the ETH encrypted currency is first converted into WETH intermediary currency, and then converted to SBT encrypted currency is because the 0x smart contract protocol is through the function of the ERC20 encrypted currency: "authorization (Approve)", making 0x smart The contract can directly transfer the user's ERC20 encrypted currency when certain conditions are met. However, Ether itself is an encrypted currency without "authorization" function, and the basic 0x smart contract cannot directly trade Ether. Therefore, the use of WETH cryptocurrency is to allow Ether to be converted into ERC20 cryptocurrency with authorization function (WETH and ETH are equivalently exchanged).

Therefore, the cryptocurrency conversion system of the blockchain of this embodiment is different from the exchange method used by traditional users to place orders on exchanges. There is no need to place orders on the exchanges and wait for matching. The exchange smart contract is used to convert the purchase order information. The exchange rate converts the Ether corresponding to the wallet address data into the corresponding ERC20 encrypted currency, which can save users from placing orders on the exchange and waiting time for matching.

In addition, after the blockchain operation is completed, the blockchain network 3 or the server 2 can further send a conversion success message to the client computer device 1 and/or the seller of the ERC20 encrypted currency to notify the exchange conversion The counterparty (user and seller) of has confirmed the completion of the exchange transaction.

In addition, this application also proposes a blockchain encryption currency conversion method, which uses the server 2 coupled to the blockchain network 3 and the user-side computer device 1 provided in the foregoing embodiment. Please refer to FIG. 2, which is a schematic flowchart of a method for converting cryptocurrency on a blockchain according to an embodiment of the application. The encryption currency conversion method of the blockchain of this application may include the following steps.

Step S1 is: the user-side computer device 1 generates encrypted currency conversion data, where the encrypted currency conversion data includes user signature data, wallet address data, and conversion exchange rate, and the wallet address data corresponds to ether; step S2 is : The server 2 generates purchase order information based on the encrypted currency conversion data, where the purchase order information includes the encrypted currency conversion data; and, step S3 is: the exchange smart contract of the blockchain network 3 calculates the purchase order information based on the purchase order information. The conversion exchange rate converts the ether corresponding to the wallet address data into the corresponding ERC20 encrypted currency, and authenticates and records after the conversion is completed. In addition, step S04 is: the blockchain network 3 or the server 2 sends the conversion success information to the user-side computer device 1 and/or the seller of the ERC20 encrypted currency.

In addition, the composition of the server 2, the user-side computer device 1 and the detailed components of the blockchain network 3 used in the encrypted currency conversion method of this application, the changes in the encrypted currency conversion method of this embodiment, and The connection relationship between the server 2, the user-side computer device 1, and the blockchain network 3 used by it is the same as that described in the previous embodiment, and will not be repeated here.

To sum up, in the encrypted currency conversion system and server disclosed in the present model, the purchase order information is generated based on the encrypted currency conversion data generated by the user-side computer device, so that the currency exchange smart contract can convert the exchange rate based on the purchase order information The Ether corresponding to the wallet address data is paired and combined with the seller to convert it into the corresponding ERC20 encrypted currency. After the conversion is completed, the conversion transaction will be authenticated and recorded on the blockchain network. In this way, users can exchange Ether into ERC20 cryptocurrency in a simpler and faster way. They don’t need to place orders on the exchange and wait for matching. Therefore, it can effectively solve the problem of users’ placing orders and trading on the exchange by themselves. Matching waiting time.

The above description is only illustrative, and not restrictive. Any equivalent modifications or changes that do not depart from the spirit and scope of this new model shall be included in the scope of the attached patent application.

1: Client computer device 2: server 3: Blockchain network 31, 32, 33, 34, 35, 36, 37: computer (node) S1, S2, S3, S4: steps

Fig. 1 is a schematic diagram of a blockchain encryption currency conversion system according to an embodiment of the new type. FIG. 2 is a schematic flowchart of a method for converting cryptocurrency on a blockchain according to an embodiment of the application.

1: Client computer device

2: server

3: Blockchain network

31, 32, 33, 34, 35, 36, 37: computer (node)

Claims (17)

A blockchain cryptocurrency conversion system, including: A user-side computer device that generates an encrypted currency conversion data, where the encrypted currency conversion data includes a user signature data, a wallet address data, and a conversion exchange rate, and the wallet address data corresponds to ether; A server coupled to the user-side computer device, the server generating a purchase order information according to the encrypted currency conversion data, wherein the purchase order information includes the encrypted currency conversion data; and A blockchain network is respectively coupled to the user-side computer device and the server. The blockchain network has a smart contract for currency swap. The smart contract for currency swap is based on the conversion rate of the purchase order information. The ether corresponding to the wallet address data is converted into a corresponding ERC20 encrypted currency, and authentication and recording are performed after the conversion is completed. The conversion system according to claim 1, wherein the encrypted currency conversion data further includes a conversion currency and a conversion quantity, and the conversion currency is the ERC20 encrypted currency. The conversion system according to claim 2, wherein the server generates a user interface in the user-side computer device according to the encrypted currency conversion data, and the user interface includes the wallet address data corresponding to the The balance of Ether, the conversion currency and the conversion exchange rate. The conversion system according to claim 3, wherein the user interface further includes a balance of the ERC20 encrypted currency. The conversion system according to claim 3, wherein the server or the seller who owns the ERC20 encrypted currency determines the conversion rate. The conversion system according to claim 3, wherein the user interface further allows a user to input the conversion quantity. The conversion system according to claim 1, wherein the token swap smart contract converts the ether into another corresponding ERC20 encrypted currency, and then matches and mixes it on the blockchain network according to the conversion rate to Convert the other ERC20 encrypted currency into the corresponding ERC20 encrypted currency. The conversion system according to claim 1, wherein the blockchain network or the server transmits a conversion success message to the client computer device and/or the seller of the ERC20 encrypted currency. A server for blockchain encryption currency conversion is coupled to a blockchain network and a user-side computer device. The server includes a memory unit and one or more processing units. The memory unit stores a plurality of Instructions, the one or more processing units are coupled to the memory unit, and the one or more processing units execute the instructions to perform the following steps: Receiving an encrypted currency conversion data generated by the user-side computer device, where the encrypted currency conversion data includes a user signature data, a wallet address data, and a conversion exchange rate, and the wallet address data corresponds to ether; Generate a purchase order information based on the encrypted currency conversion data, where the purchase order information includes the encrypted currency conversion data; and A currency swap smart contract through the blockchain network converts the Ether corresponding to the wallet address data into a corresponding ERC20 encrypted currency according to the conversion rate of the purchase order information, and after the conversion is completed, through the The blockchain network performs authentication and recording. The server according to claim 9, wherein the encrypted currency conversion data further includes a conversion currency and a conversion quantity, and the conversion currency is the ERC20 encrypted currency. The server according to claim 10, which generates a user interface in the user-side computer device according to the encrypted currency conversion data, and the user interface includes the balance of the ether corresponding to the wallet address data , The conversion currency and the conversion exchange rate. The server according to claim 11, wherein the user interface further includes a balance of the ERC20 encrypted currency. The server described in claim 11 determines the conversion rate, or the seller who owns the ERC20 cryptocurrency determines the conversion rate. The server according to claim 11, wherein the user interface further allows a user to input the conversion amount. For example, the server according to claim 9, wherein the token swap smart contract converts the ether into another corresponding ERC20 cryptocurrency, and then matches and mixes it on the blockchain network according to the conversion exchange rate. Convert the other ERC20 encrypted currency into the corresponding ERC20 encrypted currency. The server described in claim 9 further performs the following steps: Send a successful conversion message to the client computer device and/or the seller of the ERC20 encrypted currency. The server described in claim 9 further performs the following steps: Send a conversion success message to the client computer device and/or the seller of the ERC20 encrypted currency through the blockchain network.

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