MULTI-ENERGY TRADING AND MANAGEMENT PLATFORM BASED ON BLOCKCHAIN

Abstract

This invention provides a method for building a multi-energy trading and management platform based on blockchain. Based on the attributes of different functions to be implemented in the energy trading and management platform, the platform is built by combining different advantages of blockchain technology and database technology. Deploy the functions of issuing transactions, matching transactions, and querying transaction information in Ethereum smart contract, store user registration information in a traditional database, and establish a mapping relationship between real information and lengthy blockchain accounts to make information of transactions on the market be displayed with real names. This method not only meets the needs of energy distributed transactions but also avoids the problem of incompatible string type data in Ethereum smart contracts which affects system performance. At the same time, the transaction data displayed with real names ensures the openness and legality of the transaction system. It has a strong reference significance for the development of new models of distributed energy trading.

Claims

1. A method for building a multi-energy trading and management platform based on blockchain, characterized in that, includes the following steps: (1) based on the characteristics of blockchain decentralization and the advantages of stable performance of traditional databases, the combination of blockchain technology and database technology is used in different functions of this invention. Blockchain technology is used for multi-energy distributed transactions and traditional databases are used to store complex string data. The system performance is improved and the resource consumption is reduced without violating the characteristics of distributed transactions; (2) build a complete multi-energy transaction and management system based on the combination of blockchain technology and database. The system structure includes four parts: blockchain layer, smart contract layer, front-end interaction layer, and database layer.

2. A method for building a multi-energy trading and management platform based on blockchain according to claim 1, characterized in that, step (1) includes the following steps: (201) determine the functions implemented by the energy trading platform. For users, the energy trading platform can enable users to issue transactions, view personal transaction results, view blockchain information generated by the exchange, view and change personal registration information, etc. For administrators, it is able for them to transfer money to a user, check the user's personal information and manage energy, etc.; (202) determine the functions implemented by blockchain technology. Based on the distributed characteristics of blockchain technology, the main part of the energy transaction is deployed on blockchain, which includes releasing energy, matching transactions automatically, and viewing the transaction results and the blockchain information generated by it. Meanwhile, users tend to trade in different types of energy, so the function of adding or deleting energy is also placed in blockchain. All the above functions are realized based on Ethereum smart contract; (203) determine the functions implemented by database technology. Based on the mature and stable characteristics of the database, and the string type data in the blockchain smart contract is very incompatible, which seriously affects the performance, the function that does not violate the principle of a distributed transaction is deployed in the database, that is, the storage of user registration information. After logging in, users can view and modify personal information. At the same time, all transaction parties in the blockchain transaction information are initially displayed with the blockchain account address. Through the peer-to-peer mapping relationship between the account address and the name stored in the database, the two parties in the transaction are changed to the name display.

3. A method for building a multi-energy trading and management platform based on blockchain according to claim 1, characterized in that, step (2) includes the following steps: (301) build a multi-energy trading system based on the combination of blockchain technology and database, and divide it into four parts: blockchain layer, smart contract layer, front-end interaction layer, and database layer; (302) create a project instance based on the cloud server platform. After creating the project file, configure the dependencies required by the Ethereum Geth client, configure the genesis block file for initialization, and then start the private chain and allow other nodes to join to complete the private chain; (303) compile the smart contract used for energy transactions with Remix online compiler. Remix automatically generates a contract application binary interface (ABI) and byte-code, and save them in the same directory as the server project file in the j son file format, Then connect the private chain, configure the private chain in a nodejs environment, and complete the contract deployment; (304) use ether.js in JavaScript to build the interface between the smart contract and the client to call the functions in the contract. The contract sends a remote procedure call (RPC) to Geth, Geth reads the transmitted function and call address, and executes corresponding instructions, and completes the internal call of the smart contract by the client. At the same time, according to the connection between the client and the smart contract, the energy information and transaction information data stored in the smart contract are returned to the client, and a user-friendly interface is generated with the help of the Vue+element framework; (305) when a user registers, the registered information and the generated blockchain account address are submitted to server. According to the peer-to-peer mapping relationship between blockchain address and the real name, when the user views the transaction in blockchain, both parties to the transaction are displayed by their names.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0024] FIG. 1 shows the overall structure of the energy trading system

DESCRIPTION OF THE INVENTION

[0025] The invention is described in further detail below in connection with the drawings and embodiments.

[0026] According to the proposed multi-energy trading and management building method, the energy trading system can be divided into four parts: blockchain layer, smart contracts layer, front-end interaction layer, and database layer. The structural connection between the four parts is shown in FIG. 1. The following is a detailed description of how the database can be used in the blockchain-based system without violating the principle of decentralization, followed by a description of the logical process and coordination mechanism of the four parts of the system, starting from the functions realized by the invention.

[0027] 1. Matching Process Between Database and Blockchain Technology

[0028] 1) Underlying technology: Building a database based on MySQL, while implementing the backend based on nodejs+egg.js, using the ethereum Geth client as the underlying layer, and using Solidity to write smart contracts.

[0029] 2) Connection rights: When the database and backend are deployed to the server, the database is closed to external connections and can only be accessed internally by the server; the backend is allowed to access the database.

[0030] 3) Separation of functions: The transaction module and the user module of the system are separated. The database mainly realizes the storage of user registration information, and users can view and modify their personal data after logging in, while all transaction information is displayed with real names.

[0031] 4) User registration is defined as the following sequence of operations.

[0032] i) Use dedicated ether.js in Ethereum smart contract to randomly generate a key pair and convert it into a private key and address, that is to generate the user's account information.

[0033] ii) Use ether.js to generate the signature of the private key and address.

[0034] iii) Send the name, ID number and other information written by users, as well as the generated address and signature (excluding the private key) to the back-end program of the server.

[0035] iv) The back-end program uses the signature to verify the address. If the address calculated from the signature is the same as the address sent by the client, the following steps are allowed, otherwise, this behavior will be prevented.

[0036] v) Store the address, name, ID number and other information in the database (not including the private key) to form mapping information.

[0037] 5) Design the view interface with the following logic.

[0038] i) The server accepts a number of parameters, including addresses and signatures, as well as a mapped list of user addresses to be queried.

[0039] ii) the back-end program uses the signature to verify the address, if the address calculated from the signature is the same as the address sent by the client, then the later steps are allowed, otherwise, this behavior will be blocked.

[0040] iii) Based on the address mapping list of users to be queried, read out the addresses, names, and other information corresponding to these users from the database, and return the information.

[0041] 6) Name and address mapping replacement of transaction information, with the following sequence of operations.

[0042] i) Use ethers.js to generate a signature associated with the currently logged-in private key and address.

[0043] ii) Call the server to search the address same as the logged-in current user.

[0044] iii) If the verification is passed, the corresponding name will be searched from the mapping list, and the true name is displayed in the trading pipeline verifiably.

[0045] 2. Analysis of System Architecture from the Perspective of Multi-Energy Trading and Management System Function

[0046] 1) Administrator Function

[0047] Administrators have no interference in the energy trading process, which ensures the distributed characteristics of the energy blockchain. However, market access mechanisms are still required in energy transactions. Traditional solutions, which rely entirely on centralized databases and allow administrators to enter the market after reviewing user submissions, still have trust issues. This is due to the fact that invoking smart contracts in the blockchain (which, for users, means triggering events such as applying for a transaction) requires a certain amount of gas fees. This system will recharge a certain amount of gas fee for each initial user. After the handling fee is exhausted, if the user wants to continue to use it, he/she needs to apply to the administrator for market access. The administrator will audit according to the basic personal information in the database. After passing the audit, the corresponding gas fees will be transferred to the user's blockchain address to complete the market access in this way. At the same time, such a transfer will also be recorded on the blockchain, ensuring the openness of the information.

[0048] The second function of the administrator is to manage the energy types. Since different types of energy determine which energy users can trade, this part of the function relies on the implementation of the smart contract in the blockchain, which makes the energy trading system have good scalability, realize the complementarity of multiple energy sources and the participation of multiple users.

[0049] 2) User Registration

[0050] The registration interface is designed in the front-end interaction layer. Ordinary users register according to the interface guidelines, then the basic personal information is saved in the database layer. At the same time, an application is issued to the blockchain layer. After successful registration, the individual blockchain address and private key will be obtained. The address and private key will be used in subsequent transactions, which are also the characteristics of the blockchain itself, ensuring the security and privacy of transactions.

[0051] 3) Buyers and Sellers Release Transaction Information

[0052] In this interface, users can apply for an energy transaction. The information submitted includes energy type, trading identity, transaction quantity and expected price.

[0053] After confirmation, the front-end interaction layer will interact with the smart contract through the Ether.js interface, storing data in the smart contract's matchmaking information structure, and executing the matching function of the smart contract at the same time.

[0054] 4) Personal Center

[0055] The Personal center includes personal data, personal releases, and personal transactions. The contents of the personal data are returned primarily by the database in which the information is stored. Personal publishing shows the transactions released by users to the market, while personal transaction shows the transactions successfully matched. On the one hand, the transaction flow is the proof of previous transactions; on the other hand, the transaction flow plays a certain reference role for the reasonable quotation after.

[0056] 5) Market on Blockchain

[0057] The on-chain market includes energy lists, all releases, and all transactions. The energy list summarizes all the energy untraded data in the current market, making it easy for users to quickly analyze the market supply and demand relations. Taking the listed energy of the current system as an example, we can see that the supply of electricity and water is in excess of demand, and the supply of gas is in short supply. However, there is still a piece of purchase information for electricity, which can be inferred that the quotation is too low and the system has not matched it.

TABLE-US-00001 TABLE 3 Residual energy information in current systems Energy Number of Total Number of Total purchase types units sales sales purchases amount electricity KWh 3 500 1 200 water m.sup.3 2 30 0 0 gas m.sup.3 0 0 3 100

[0058] In addition, the user can see all the successful transaction information, including the transaction time, transaction parties, transaction energy, transaction volume and transaction price, etc. Firstly, the transaction information is returned by the smart contract layer. Then, according to the mapping relationship between the names stored in the database and the blockchain address, the transaction parties in the transaction information are replaced by real names. More importantly, different from the traditional transaction information, each transaction is recorded on the blockchain, which also contains the elements of the blockchain itself, such as block height, block hash, parent block hash, etc., which are transferred in by the blockchain layer. This information does not have much reference value for users, but each user can get the complete information of the blockchain, that is, their copy, which is very important to ensure the fairness, openness, and unforgeability of the whole trading system.