CN113935786B

CN113935786B - Carbon emission right transaction system and method based on block chain

Info

Publication number: CN113935786B
Application number: CN202111526625.8A
Authority: CN
Inventors: 张金琳; 俞学劢
Original assignee: Zhejiang Shuqin Technology Co Ltd
Current assignee: Zhejiang Shuqin Technology Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-04-01
Anticipated expiration: 2041-12-15
Also published as: CN113935786A

Abstract

The invention relates to the technical field of information, in particular to a block chain-based carbon emission right transaction system and a block chain-based carbon emission right transaction method, wherein the system comprises a synchronization subsystem, a list hanging subsystem and a matching subsystem, establishes a virtual account for an enterprise, and transfers a certificate in accordance with the initial carbon emission right quantity of the enterprise; the bill hanging subsystem receives bill hanging information of an enterprise, issues a sale intelligent contract for the bill hanging information on the block chain, and transfers a general certificate to a purchase virtual account after verification of the sale intelligent contract when a purchase table is filled with the purchase amount and the purchase virtual account; the matching subsystem receives purchase information of an enterprise, reads a selling intelligent contract on the block chain in real time, matches the selling intelligent contract and the purchase information, fills a purchase table according to a matching result, and transfers digital assets with corresponding values into a virtual account for selling the intelligent contract. The substantial effects of the invention are as follows: the transaction process of the carbon emission right is real, credible, transparent and traceable, and management and supervision are convenient.

Description

Carbon emission right transaction system and method based on block chain

Technical Field

The invention relates to the technical field of information, in particular to a block chain-based carbon emission right transaction system and method.

Background

The industrial production activities of human beings since the last century emit a large amount of greenhouse gases such as carbon dioxide into the atmosphere, which leads to the aggravation of global greenhouse effect. The temperature rise brings a series of meteorological disasters and climate changes, and increasingly severe influences are generated on the survival development of human beings. In order to cope with the greenhouse effect which is still increasing, measures for reducing carbon emissions are being made in many countries and regions. Among them, the management of carbon emission rights has been gaining a lot of attention and research as one of the most widely used measures. Carbon emissions have become valuable assets that can be exchanged as commodities on the market. Enterprises with difficult emission reduction can purchase carbon emission rights to enterprises with easy emission reduction, and the enterprises with difficult emission reduction can complete emission reduction tasks and gain profits at the same time. At present, the way for enterprises to obtain the carbon emission rights is mainly the initial distribution of governing bodies and the acquisition of market trading. And allocating a certain initial carbon emission right by a competent organization according to the industry and production data of the enterprise. If the carbon emission reduction of the enterprises is insufficient, the carbon emission rights are acquired from other enterprises with surplus carbon emission rights through market trading. So can manage and control the total carbon emission of whole enterprises, help reducing greenhouse gas's whole emission. However, the carbon emission right is a virtual asset, and a transaction scheme which can not only carry out carbon emission right transaction conveniently, but also check the authenticity of the carbon emission right and trace the transaction is not available at present. Therefore, a trading scheme which realizes the trading of the carbon emission right, is transparent and credible and is convenient to trace needs to be researched.

For example, chinese patent CN111325549A, published 2020, 6.23.A block chain-based carbon emission right and green certificate transaction combination system and method introduces a notary mechanism of a block chain into a carbon emission right and green certificate transaction system, wherein the notary is used to convert green certificates in a green certificate module into carbon emission amount deduction amount, and input the carbon emission amount into a carbon emission right module, that is, convert the green certificate balance amount into carbon emission right balance amount in a predetermined ratio; if the renewable energy project meets the standards of voluntary emission reduction (CCER) of the green certificate issuing and carbon emission rights, the green certificate issuing information in the green certificate module needs to be synchronized to the carbon emission rights module, the sources of the green certificate issuing information and the carbon emission rights are compared, and the repeated amount is deducted. The notary carries out information interaction, carries out information communication on the premise that the two sets of systems operate relatively independently, removes redundant declaration situations, simplifies the supervision process and realizes cross-link recording. But the technical scheme can not provide the traceability of the trading process of the carbon emission rights.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the technical problem of lack of a carbon emission right transaction scheme convenient for supervision and tracing at present. The block chain-based carbon emission right transaction system and method are provided, and by means of the credibility, transparency and traceability of the block chain, the transparency and traceability of the carbon emission right transaction are realized, and the supervision and traceability are facilitated.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a block chain-based carbon emission right transaction system comprises a synchronization subsystem, a list hanging subsystem and a matching subsystem, wherein the synchronization subsystem synchronizes the registration information of enterprises and the initial carbon emission rights of the enterprises from a competent department, establishes virtual accounts on the block chain for each enterprise, issues a pass certificate on the block chain, and transfers the pass certificate which is in accordance with the number of the initial carbon emission rights of the enterprises to each virtual account of the enterprise; the hang-order subsystem receives hang-order information of an enterprise, the hang-order information comprises a certification amount, a unit price and a seller virtual account, the hang-order subsystem issues a sale intelligent contract for the hang-order information on a block chain, the sale intelligent contract comprises the certification amount, the unit price, the seller virtual account and a purchase table, the enterprise transfers the corresponding amount of certification to the virtual account of the sale intelligent contract, when the purchase table of the sale intelligent contract is filled with the purchase amount and the purchase virtual account, the sale intelligent contract verifies whether digital assets with the same value are transferred to the virtual account of the sale intelligent contract, if the verification is passed, the corresponding amount of certification is transferred to the purchase virtual account, and when the certification of the sale intelligent contract is completely sold, the sale intelligent contract is destroyed; the matching subsystem receives purchase information of an enterprise, wherein the purchase information comprises a certified purchase amount, a unit price limit and a buyer virtual account, the matching subsystem reads a selling intelligent contract existing on a block chain in real time, matches the selling intelligent contract and the purchase information, fills a purchase table corresponding to the selling intelligent contract according to a matching result, and transfers digital assets with corresponding values into the virtual account for selling the intelligent contract.

Preferably, the matching subsystem receives combined purchase information of an enterprise, the combined purchase information comprises a plurality of accredited purchase amounts, a plurality of unit price limits and a buyer virtual account, the accredited purchase amounts and the unit price limits are in one-to-one correspondence, and when the combined purchase information is matched, only one group of accredited purchase amounts and the unit price limits are paid.

Preferably, the matching subsystem comprises an instant matching mode and a price stabilizing matching mode, when the matching subsystem is in the instant matching mode, the matching subsystem receives purchase information of an enterprise, inquires selling intelligent contracts on a block chain, tries to obtain all selling intelligent contracts of which the unit price is not higher than the unit price limit of the purchase information, periodically retries if the matching selling intelligent contracts are not obtained, if at least one selling intelligent contract is obtained, arranges the obtained selling intelligent contracts according to the ascending order of the unit price, matches the selling intelligent contracts with the purchase information according to the sequence until the matching amount meets the approved purchase amount in the purchase information, and periodically retries to obtain the matching selling intelligent contracts if the obtained selling intelligent contracts are not matched completely and can not meet the approved purchase amount; when the matching system is in a price stabilizing matching mode, the matching subsystem divides transaction time into a plurality of matching periods, receives and stores purchase information, after the matching periods are ended, the matching subsystem reads the stored purchase information at the ending moment of the matching periods, the matching subsystem searches for transaction unit prices, so that the purchase information with unit price limit higher than the transaction unit price and intelligent selling contracts with price lower than the transaction unit price are all matched, the purchase information with unit price limit equal to the transaction unit price or the intelligent selling contracts with price equal to the transaction unit price are all matched, the transaction unit price enables the number of the pass matched to be the largest, the matching subsystem calculates the total price of the pass matched, calculates the number of the pass matched with each enterprise, and the enterprises share the total price according to the ratio of the number of the pass matched with each other; the matching subsystem monitors matching transaction prices, enters a price stabilizing matching mode when the fluctuation of the transaction prices exceeds a preset threshold value, and returns to an instant matching mode after a preset time length.

Preferably, when the matching subsystem searches for the trading unit price, the following steps are executed: arranging the read purchase information in a descending order according to unit price limit, reading all sold intelligent contracts on the current block chain, arranging the sold intelligent contracts in an ascending order according to unit price, and setting unit prices for inspecting the unit prices to traverse the sold intelligent contracts; counting the total number of all the certificates of the intelligent sale contracts with the unit price not higher than the unit price for investigation, recording the total number of the certificates as the sale, counting the sum of the total amount of the certificates of all the purchase information with the unit price limit equal to the unit price for investigation, recording the sum as the purchase, and recording the smaller value of the total amount of the sale and the purchase as the amount of the certificates of the passage under the unit price for investigation; the unit price under investigation with the largest amount of transaction is the final transaction unit price.

Preferably, the matching subsystem counts the sum of the total number of the pass purchase quantity of all the purchase information with the unit price limit equal to the transaction unit price, records the sum as the total number of the purchase, reads the pass purchase quantity of the purchase information of each enterprise at the transaction unit price, calculates the ratio of the total number of the pass purchase quantity of each enterprise to the total number of the purchase, records the ratio as the ratio of the purchase quantity of the enterprise, and takes the product of the total number of the purchase and the ratio of the purchase quantity of the enterprise as the number of the pass transaction of the enterprise.

Preferably, when the matching subsystem enters a price stabilizing matching mode, a purchase information joint filling bill is provided for an enterprise, the purchase information joint filling bill comprises N filling bills, N is more than or equal to 3, the filling bills comprise a plurality of approved purchase quantity filling columns, a plurality of unit price limit filling columns and buyer virtual account filling columns, each unit price limit filling column corresponds to the N approved purchase quantity filling columns, the unit price limit filling columns of the N filling bills are synchronized, the matching subsystem periodically matches the N enterprises for joint filling of the purchase information joint filling bill, binds one filling bill for each enterprise, writes the virtual accounts of the enterprises into the buyer virtual account filling columns of the filling bills, notifies the unit price limit contained in the preset filling section of the unit price limit filling column of the filling bill, issues the purchase information joint filling bill to the N enterprises, and sends IP addresses of the enterprises jointly filled with the N enterprises, after the enterprises obtain the purchase information joint filling order, the program automatically generates random numbers to fill the corresponding filling-up certificate purchase amount filling columns of other enterprises in the purchase information joint filling order, communication is established among the enterprises, the random numbers filled up in the corresponding filling-up certificate purchase amount filling columns of the enterprises by other enterprises are obtained and summed, recording the random sum, displaying the random sum in a corresponding general-purpose purchase amount filling column of the same unit price limit, the enterprise determines the actual amount of the accredited purchase of the corresponding voucher at each unit price limit, subtracts the actual amount of the accredited purchase of the corresponding voucher from the random value to obtain a filling value, fills the filling value into a corresponding filling column of the amount of the accredited purchase of the corresponding voucher, the business calculates the sum of the values of the certified purchase amount filling columns of all the filled orders under each unit price limit, recording the number of hung orders as unit price limit, and reporting the unit price limit related to the number of hung orders to the matching subsystem by the enterprise; the matching subsystem obtains a transaction price that allows purchase information that maximizes the number of passes matched and has a price limit equal to the transaction price to be fully matched.

Preferably, the matching subsystem sets a price monitoring period, when the price monitoring period is finished, the matching subsystem obtains all transaction unit prices and corresponding pass transaction amounts in the price monitoring period, arranges the transaction unit prices in a descending order, calculates the total number of pass transaction, respectively obtains a head transaction unit price interval and a tail transaction unit price interval which are used for ordering the preset percentage of the head and tail transaction unit amount in the total number, respectively records weighted average values of the transaction unit prices in the head transaction unit price interval and the tail transaction unit price interval as head average values and tail average values as tail average values, and judges that transaction unit price fluctuation exceeds a preset threshold value if the difference value of the head average value and the tail average value is greater than a preset threshold value.

A block chain-based carbon emission right trading method using the block chain-based carbon emission right trading system as described above, comprising: synchronizing the registration information of the enterprises and the initial carbon emission rights of the enterprises from a competent department, establishing a virtual account on a block chain for each enterprise, issuing a pass certificate on the block chain, and transferring the pass certificate which is consistent with the initial carbon emission rights of the enterprises to each virtual account of the enterprise; receiving the coupon information of an enterprise, wherein the coupon information comprises a general amount, a unit price and a seller virtual account, issuing a sale intelligent contract for the coupon information on a block chain, the sale intelligent contract comprises the general amount, the unit price, the seller virtual account and a purchase table, when the purchase table of the sale intelligent contract is filled with the purchase amount and the purchase virtual account, the sale intelligent contract verifies whether the digital assets with the same value are transferred to the virtual account of the sale intelligent contract, if the verification is passed, the corresponding amount of the general certificate is transferred to the purchase virtual account, and when the general certificate of the sale intelligent contract is completely sold, the sale intelligent contract is destroyed; the method comprises the steps of receiving purchase information of an enterprise, wherein the purchase information comprises a certified purchase amount, a unit price limit and a buyer virtual account, reading a selling intelligent contract existing on a block chain in real time, matching the selling intelligent contract with the purchase information, filling a purchase table corresponding to the selling intelligent contract according to a matching result, and transferring digital assets with corresponding values into the virtual account for selling the intelligent contract.

Preferably, combined purchase information of an enterprise is received, the combined purchase information comprises a plurality of accredited purchase amounts, a plurality of unit price limits and a buyer virtual account, the accredited purchase amounts and the unit price limits are in one-to-one correspondence, and when the combined purchase information is matched, only one group of accredited purchase amounts and the unit price limits are paid; when the price fluctuation of the transaction order does not exceed a preset threshold value, using an instant matching mode to match, and when the price fluctuation of the transaction order exceeds the preset threshold value, using a price stabilizing matching mode to match; the method for matching by using the instant matching mode comprises the following steps: the method comprises the steps of receiving purchase information of an enterprise, inquiring selling intelligent contracts on a block chain, trying to obtain all selling intelligent contracts of which the unit price is not higher than the unit price limit of the purchase information, periodically re-trying if the selling intelligent contracts are not obtained to be consistent with the selling intelligent contracts, obtaining at least one selling intelligent contract, arranging the obtained selling intelligent contracts according to the unit price in an ascending order, matching the selling intelligent contracts and the purchase information according to the sequence until the matching amount meets the certified purchase amount in the purchase information, and periodically re-trying to obtain the consistent selling intelligent contracts if the obtained selling intelligent contracts are not met after all matched with the certified purchase amount; the method for matching by using the price stabilizing matching mode comprises the following steps: dividing the transaction time into a plurality of matching periods, receiving and storing purchase information, reading the stored purchase information at the end of the matching period after the matching period is ended, searching for the transaction unit price, enabling the purchase information with the unit price limit higher than the transaction unit price and the intelligent sale contract with the price lower than the transaction unit price to be completely matched, enabling the purchase information with the unit price limit equal to the transaction unit price or the intelligent sale contract with the price equal to the transaction unit price to be completely matched, enabling the transaction unit price to enable the number of pass documents matched to be the largest, calculating the total sale price of the pass documents matched to the transaction, calculating the pass transaction number of each enterprise, and allocating the total sale price according to the pass transaction number.

Preferably, the method of receiving purchase information when making a match using the price-hold matching mode includes: providing a purchase information joint filling sheet for an enterprise, wherein the purchase information joint filling sheet comprises N filling sheets, N is more than or equal to 3, the filling sheets comprise a plurality of certified purchase amount filling columns, a plurality of unit price limit filling columns and buyer virtual account filling columns, each unit price limit filling column corresponds to N certified purchase amount filling columns, the unit price limit filling columns of the N filling sheets are synchronous in content, the N enterprises are periodically matched for joint filling of the purchase information joint filling sheet, one filling sheet is bound for each enterprise, the virtual account of the enterprise is written into the buyer virtual account filling column of the filling sheet, the unit price limit filling column of the filling sheet fills the unit price limit contained in a preset interval, the purchase information joint filling sheet is issued to the N enterprises, the IP address of the filled enterprise in joint filling is notified to the N enterprises, and after the purchase information joint filling sheet is obtained, a program automatically generates random numbers to fill the certified purchase amount filling columns of the filling sheets corresponding to other filling sheets in the purchase information joint filling sheet of the enterprise, establishing communication among enterprises, acquiring random numbers filled by other enterprises in a corresponding voucher purchase quantity filling column of the enterprise, summing the random numbers, recording the random numbers as a random sum, displaying the random sum in the corresponding voucher purchase quantity filling column with the same unit price limit, determining the actual voucher purchase quantity under each unit price limit by the enterprises, subtracting the random sum from the actual voucher purchase quantity to obtain a filling value, filling the filling value into the corresponding voucher purchase quantity filling column, calculating the sum of the numerical values of all voucher purchase quantity filling columns under each unit price limit by the enterprises, recording the sum as the number of hung bills of unit price limit, and reporting the number of hung bills associated with the unit price limit by the enterprises; a transaction unit price is obtained that allows purchase information that maximizes the number of passes made to match and has a unit price limit equal to the transaction unit price to be made all together.

The substantial effects of the invention are as follows: the method has the advantages that the method releases the certificate on the block chain, tracks the carbon emission right transaction process by means of the certificate, ensures that the carbon emission right transaction process is real, credible, transparent and traceable, is convenient for a supervisor to manage and is also convenient for the public to supervise, and can promote the carbon emission right performance of a control enterprise; by means of a price stabilizing and matching mode, excessive fluctuation of price is avoided, speculative behaviors on a carbon emission right trading market are inhibited, not only can the benefits of enterprises participating in control and emission control be protected, but also the robustness of a market adjusting mechanism can be enhanced, the condition of avoiding market adjusting failure is reduced, the fairness of carbon emission right performance is maintained, and the development of enterprises with high energy utilization efficiency is promoted; the purchase information joint filling sheet can ensure that the carbon emission right purchase information of the enterprise is kept secret, thereby not only protecting the operating secret of the enterprise, but also preventing the information from being used for market speculation behaviors and promoting the healthy operation of the carbon emission right trading market.

Drawings

Fig. 1 is a schematic diagram of a carbon emission right trading system according to an embodiment.

FIG. 2 is a schematic diagram of the operation of the matching subsystem according to the embodiment.

Fig. 3 is a schematic diagram of a method for finding a trading unit price by a matching subsystem according to an embodiment.

FIG. 4 is a schematic diagram of a method for monitoring transaction unit price fluctuation according to an embodiment.

FIG. 5 is a diagram illustrating a carbon emission trading method according to an embodiment.

Fig. 6 is a schematic diagram illustrating a matching method in a real-time matching mode according to an embodiment.

FIG. 7 is a diagram illustrating a matching method in a price suppressing matching mode according to an embodiment.

Fig. 8 is a schematic diagram of a combined method for receiving purchase information and populating a party according to the second matching subsystem.

Fig. 9 is a schematic diagram of a method for receiving purchase information according to a second embodiment.

Wherein: 10. the system comprises a synchronization subsystem, 20, a hang order subsystem, 30, a block chain, 31, a certificate, 32, a sale intelligent contract, 40, a matching subsystem, 41, purchase information, 42, an instant matching mode, 43 and a price stabilizing matching mode.

Detailed Description

The following provides a more detailed description of the present invention, with reference to the accompanying drawings.

The first embodiment is as follows:

a block chain-based carbon emission right trading system, please refer to FIG. 1, which comprises a synchronization subsystem 10, a list hanging subsystem 20 and a matching subsystem 40, wherein the synchronization subsystem 10 synchronizes the registration information of enterprises and the initial carbon emission rights of the enterprises from a competent department, establishes a virtual account on a block chain 30 for each enterprise, issues a pass certificate 31 on the block chain 30, and transfers the pass certificate 31 in accordance with the number of the initial carbon emission rights of the enterprises to each virtual account of the enterprise; the hang-order subsystem 20 receives hang-order information of an enterprise, the hang-order information comprises a certification amount, a unit price and a seller virtual account, the hang-order subsystem 20 issues a sale intelligent contract 32 for the hang-order information on the block chain 30, the sale intelligent contract 32 comprises the certification amount, the unit price, the seller virtual account and a purchase table, when the purchase table of the sale intelligent contract 32 is filled in the purchase amount and the purchase virtual account, the sale intelligent contract 32 verifies whether digital assets with the same value are transferred to the virtual account of the sale intelligent contract 32, if the verification is passed, the corresponding amount of the certification 31 is transferred to the purchase virtual account, and when the certification 31 of the sale intelligent contract 32 is completely sold, the sale intelligent contract 32 is destroyed; the matching subsystem 40 receives purchase information 41 of an enterprise, wherein the purchase information 41 comprises a certified purchase amount, a unit price limit and a buyer virtual account, the matching subsystem 40 reads the selling intelligent contract 32, the matching selling intelligent contract 32 and the purchase information 41 which are arranged on the block chain 30 in real time, fills a purchase table corresponding to the selling intelligent contract 32 according to a matching result, and transfers the digital assets with corresponding values into the virtual account for selling the intelligent contract 32. As an alternative embodiment, the matching subsystem 40 receives combined purchase information of the enterprise, the combined purchase information includes a plurality of certified purchase amounts, a plurality of unit price limits and a buyer virtual account, the certified purchase amounts and the unit price limits correspond to each other one by one, and when the combined purchase information is matched, only one group of certified purchase amounts and the unit price limits are paid.

The block chain 30 usually uses a public key or a hash value of the public key as a virtual account, such as MD5(0xD0182E … 547C9B0), and for convenience, the present embodiment directly uses the public key as the virtual account, such as 0xD0182E … 547C9B0 is a virtual account. Establishing virtual accounts for enterprises, wherein the virtual accounts of the enterprises A, B and C are respectively as follows: 0xE538DA … 5EE6FD8, 0xC2F5E6 … 71a435D and 0xD8E538 … 5EE2C 94.

The passport 31 is one of the digital assets, and formally the passport 31 is a unique string of characters, such as CAFET2021CE3D1E 9. The permit 31 begins with a CAFET to indicate that the permit 31 represents a carbon emission right benefit, followed by the addition of a four digit year number to indicate that the permit 31 was added for the year. The voucher 31 representing the carbon emission rights in this embodiment has a unique issuing virtual account, which is owned by the governing body. In this embodiment, the issuing virtual account used by the administrator is 0xCD13E7 … 0BFFE94, which is a public key address, and the corresponding private key is stored by the administrator. The roll-out account for the first transaction record on blockchain 30 representing a pass-through 31 for carbon emission rights must be 0xCD13E7 … 0BFFE 94. The competent organization also establishes a performance virtual account 0xA42FBA … 4C9D57A on the blockchain 30, and obtains annual equipment operation data of the controlled and ranked enterprise and annual carbon emission confirmation quantity of the enterprise. The controlling enterprise needs to transfer to the performance virtual account 0xA42FBA … 4C9D57A a voucher 31 corresponding to a carbon emissions certification amount to indicate its performance.

TABLE 1 transaction record for Certification CAFET2021CE3D1E9

(TOKEN)CAFET2021CE3D1E9
	(TradeId)4580105312024(From)0xCD13E7…0BFFE94(Recieve)0xE538DA…5EE6FD8(Time)1635937269(HASH)900E3D…96A4F7(Sign)GA1UEAwH…wYJKoZIhvcNAQc
(TradeId)1071408529186(From)0xE538DA…5EE6FD8(Recieve)0xC2F5E6…71A435D(Time)1630666157(HASH)AF04A4…FD78E1(Sign)ATZe90Jr…Qz3UhcLBNfW086
	(TradeId)7459064027547(From)0xC2F5E6…71A435D(Recieve)0xD8E538…5EE2C94(Time)1627981804(HASH)9D73B4…749154(Sign)02uMjsqD…QzgdANfWmDoYD

As shown in table 1, the transaction record of CAFET2021CE3D1E9 is a certified transaction record, which is issued by the governing body and transferred to virtual account 0xD7CE87 … D4620B6 of enterprise a, and then transferred to virtual account 0xDC9071 … 8764B16 of enterprise c after two transfers. Sign represents signature information, namely a result of multi-transaction hash encryption of a private key of the transferred virtual account, wherein the transaction hash is the hash of the certificate of pass, the transferred virtual account and the timestamp.

There will be a certain number of certificates 31 issued by the governing body on the blockchain 30, which are not used in the present year and can be left to the next year for trading or for performing underwriting. A pass 31 representing carbon emissions rights may be traded between enterprises. Enterprises with the surplus general evidence 31 can obtain economic benefits through transactions, so that the enterprises can save energy and reduce discharge to strive to obtain economic returns. For those businesses that are unable to perform the management task, the owned voucher 31 will be insufficient and the missing part will need to be acquired by the transaction. The enterprise is caused to bear extra capital cost, the energy conservation and emission reduction of the production are promoted, the production scale is reduced or process equipment is improved.

The enterprise that wants to sell the surplus voucher 31 submits the hang ticket information to the hang ticket subsystem 20. If the first enterprise wants to sell 100 tons of carbon emission at a price of 0.15 ten thousand yuan per ton, the hang ticket information submitted to the hang ticket subsystem 20 by the first enterprise is as follows: (100,0.15,0xE538DA … 5EE6FD8), where 100 represents a number of passes, each pass representing a carbon emission weight of 1 ton. The minimum trade and performance unit for carbon emissions is 1 ton. After receiving the hang ticket information sent by the enterprise a, the hang ticket subsystem 20 issues a sell intelligent contract 32 on the blockchain 30. The sell intelligent contract 32 records the amount of the voucher, the unit price, the virtual account of the seller, and the purchase table, as shown in table 2, and records the contents of the intelligent contract issued by the hang ticket subsystem 20 for the hang ticket information of business a. Where purchase amount-purchase virtual account-1 is the first line of the purchase table in which the information is populated. The information in the information shows that the enterprise B wants to buy 60 certificates, namely representing the carbon emission right of 60 tons. Business b transfers the digital assets of corresponding value to a virtual account that sells the smart contract 32. The sales intelligence contract 32 will verify after the sales table is filled with new content. If the virtual account selling the smart contract 32 receives digital assets matching the newly filled-in information from the purchase list, the selling smart contract 32 transfers a corresponding number of certificates into the purchasing virtual account 0xC2F5E6 … 71A435D and the seller virtual account 0xE538DA … 5EE6FD 8. NULL indicates that information has not been filled. Before verifying the received digital assets, the sales intelligence contract 32 first verifies whether the newly added purchase information can be satisfied. Specifically, selling intelligent contract 32 checks the sum of the amount of certificates of the purchase information records identified as TRUE already existing in the purchase table, and subtracts the sum of the amount already purchased from the amount of certificates of selling intelligent contract 32 to obtain the current remaining amount of certificates. If the remaining number of passes meets the newly added purchase information, the received digital asset condition is checked. To avoid a failure to match the digital asset with the purchase information, the present embodiment requires that the digital asset must be transferred from the purchase virtual account in the purchase information. If the digital assets received by the intelligent contract for sale 32 do not accord with the purchase information, the corresponding purchase information is marked as FALSE, and the digital assets are converted back after necessary handling fees are deducted. And if the residual number of the certificates cannot meet the purchase information, marking the corresponding purchase information as H-TRUE, and transferring the residual number of the certificates into the purchase virtual account. And calculating the quantity of the digital assets according to the unit price, and converting the rest digital assets back after necessary handling fees.

Table 2 sale of intelligent contracts 32

Number of general certificates	100
		Unit price of	0.15
Seller virtual account	0xE538DA…5EE6FD8
		Purchase volume-Purchase virtual Account-1	(60-0xC2F5E6…71A435D,TRUE)
Purchase volume-purchase virtual account-2	NULL
		…	…
Purchase amount-purchase virtual account-n	NULL

In order to minimize the number of times that the sale intelligent contract 32 fails the verification, the present embodiment matches the sale intelligent contract 32 with the purchase information by means of the matching subsystem 40, and instead fills the purchase table. Therefore, the matching subsystem 40 has the function of managing and controlling the transaction so as to maintain the health of the evidence-based transaction market and promote the evidence-based transaction to better play a market regulation role.

In this embodiment, the matching subsystem 40 includes an instant matching mode 42 and a price flat matching mode 43, see figure 2, when in the instant match mode 42, the matching subsystem 40 receives purchase information for the enterprise, queries the sales intelligence contracts 32 on the blockchain 30, attempts to obtain all sales intelligence contracts 32 having a price that is not higher than the price limit of the purchase information, if no matching sales intelligence contract 32 is obtained, periodically re-trying, if at least one sale intelligent contract 32 is obtained, arranging the obtained sale intelligent contracts 32 according to the ascending order of unit price, the sales intelligence contracts 32 are matched with the purchase information in the order until the matched amount meets the amount of the certified purchase in the purchase information, when the obtained intelligent contracts 32 for sale are matched completely and the certified purchase quantity cannot be met, periodically re-trying to obtain the matched intelligent contracts 32 for sale; when the matching system is in the price stabilizing matching mode 43, the matching subsystem 40 divides the transaction time into a plurality of matching periods, receives and stores the purchase information, after the matching period is ended, the matching subsystem 40 reads the stored purchase information at the end of the matching period, the matching subsystem 40 searches for the transaction unit price, so that the purchase information with the price limit higher than the transaction unit price and the intelligent sale contract 32 with the price lower than the transaction unit price are all matched, the purchase information with the price limit equal to the transaction unit price or the intelligent sale contract 32 with the price equal to the transaction unit price are all matched, the transaction unit price enables the number of the pass matched to be the largest, the matching subsystem 40 calculates the total sale price of the pass matched, calculates the pass transaction number of each enterprise, and the enterprises allocate the total sale price according to the pass transaction number; the matching subsystem 40 monitors the matching transaction price, and when the transaction price fluctuation exceeds a preset threshold, the matching subsystem 40 enters a price stabilizing matching mode 43 and returns to an instant matching mode 42 after a preset duration.

As shown in table 3, at some point in time, the sales intelligence contracts 32 that exist on the blockchain 30 are summarized in units. Table 4 shows the purchase information for business a, business b, and business c, with the numbers indicating the numbers assigned by the matching subsystem 40 to the received purchase information. As shown in Table 4, business A submits the purchase information first, and then business B and business C submit the purchase information. The enterprise A emits more carbon, the benefit is poor, and the enterprise A cannot bear higher carbon emission unit price. The method is required to urge enterprises to reduce the production scale or improve process equipment so that the enterprises can bear higher carbon emission unit price. The emission of the enterprise B is greater than that of the enterprise A, but the energy utilization efficiency is high, and the income obtained under the unit carbon emission is higher, so that the enterprise B can bear higher carbon emission right unit price. Under the control and discharge system, the enterprise B is expected to expand the production scale so as to supplement the rejected capacity with low energy utilization efficiency and provide enough consumption products for the society. The enterprise C not only has less emission and can bear higher carbon emission unit price, but also has higher energy utilization efficiency, and is an enterprise needing to promote the production scale to be enlarged.

Table 3 smart contracts for sale 32 that exist on blockchain 30 at a time

Unit price of	Number of general certificates
			0.10	60
0.12	80	140
			0.15	120	260
0.18	180	440
			0.20	240	680

Table 4 matching of purchase information received by subsystem 40

Numbering	General evidence purchase amount	Price limit of unit	Buyer virtual account
				698506	200	0.12	0xE538DA…5EE6FD8
698507	300	0.18	0xC2F5E6…71A435D
				698508	100	0.2	0xD8E538…5EE2C94

When the matching subsystem 40 is in the instant matching mode 42, the purchase demand with the number of 698506 is first matched, that is, the purchase information reported by the business A is to purchase 200 passes at a price of not higher than 0.12 ten thousand yuan. The matching subsystem 40 inquires the block chain 30, obtains 60 certificates to be sold with the unit price of 0.10 ten thousand yuan, and 80 certificates to be sold with the unit price of 0.12 ten thousand yuan, then matches 140 certificates to be handed over, wherein 60 certificates require the business A to pay according to the unit price of 0.1 ten thousand yuan, namely 6 yuan, and the other 80 certificates require the business A to pay according to the unit price of 0.12 ten thousand yuan, namely 9.6 yuan, the business A pays 15.6 ten thousand yuan in total, and transfers equivalent digital assets to corresponding intelligent selling contracts 32. The digital assets can be other types of passes issued on the blockchain 30 or legal digital currency. At this time, the purchase information of the business a still has 60 evidence that the purchase demand is not satisfied, and the matching subsystem 40 will periodically query the blockchain 30 to try to find the selling intelligent contracts 32 satisfying the price limit to match the purchase information of the business a. The matching subsystem 40 then matches the purchase information for business b and sales intelligence contracts 32 with a price of 0.15 and a price of 0.18 will be matched. Then the matching subsystem 40 matches the purchase information of the third enterprise, and the inquiry block chain 30 obtains 240 pieces of evidence quantity of the intelligent contracts 32 sold with the unit price of 0.20, so that the purchase demand of the third enterprise is met. In the instant match mode 42, after the matching subsystem 40 matches the purchase information of the business a, the business b, and the business c, the remaining sales intelligent contracts 32 on the blockchain 30 are as shown in table 5, and only the sales intelligent contracts 32 with the unit price of 0.20 still have 140 passes. The certified price rises from 0.10 to 0.20 by the matching in the immediate matching mode 42.

TABLE 5 Intelligent contract for sale 32 after matching in instant match mode

Unit price of	Number of general certificates
		0.20	140

When the matching subsystem 40 is in the price stabilizing matching mode 43, the purchase information of the business A, the business B and the business C is received and stored, when one matching period is finished, the next matching period is simultaneously entered, and the stored purchase demands with the numbers of 698506 to 698508 are read. And the purchase information received only when entering the next matching period is not brought into the matching, is only stored, and is read out and brought into the matching after the next matching period is finished. Matching subsystem 40 queries blockchain 30 for summaries of sales intelligence contracts 32 as shown in table 3. The matching subsystem 40 attempts to find the price of the deal.

Referring to fig. 3, the following steps are performed: step A01) arranging the read purchase information in a descending order according to unit price limit, reading all the intelligent contracts 32 sold on the current block chain 30, arranging the intelligent contracts 32 sold in an ascending order according to unit price, and setting unit prices for inspecting unit prices to traverse the intelligent contracts 32 sold; step A02) counting the sum of the number of the total certificates of the intelligent contract 32 sold with the price not higher than the unit price for investigation, marking as the total sold amount, counting the sum of the total certificate purchase amount of the total purchase information with the price limit equal to the unit price for investigation, marking as the total purchased amount, and marking the smaller value of the total sold amount and the total purchased amount as the certificate transaction amount under the unit price for investigation; step A03) the final transaction unit price is confirmed to be the unit price under consideration with the largest transaction amount.

Through steps a 01) to a 03), the final transaction price is 0.18 ten thousand yuan. The purchase information with the unit price limit higher than 0.18 ten thousand yuan is the purchase information submitted by the enterprise C, namely 100 passes are purchased with the unit price limit of 0.20 ten thousand yuan, and all the passes are made. The certificates for selling the intelligent contracts 32 with the unit price lower than 0.18 ten thousand yuan will be all sold. I.e. 60 passes with a price of 0.1, 80 passes with a price of 0.12 and 120 passes with a price of 0.15 will all be matched. And the purchase information with the unit price limit equal to 0.18 ten thousand yuan is submitted to the enterprise B, and all the information is matched. A sale of the smart contract 32 having a price rate equal to 0.18, there is a partial warranty remainder. The condition of ending the search for the bargaining unit price is met.

At this time, the unit price limit of the business A is lower than 0.18 ten thousand yuan, so that the purchase information of the business A is not matched with any certificate. The enterprise B and the enterprise C purchase 400 general certificates. The total selling price amount is: 58.8=0.1 × 60+0.12 × 80+0.15 × 120+0.18 × 140, i.e. a total of 58.8 ten thousand dollars are required. Wherein, the enterprise B purchases 300 general certificates, which account for 75 percent of the total purchasing general certificates. The third enterprise purchases 100 general certificates, which account for 25% of the total purchase general certificates. The amount of money to be allocated by the enterprise B is as follows: 44.1=58.8 × 75%, the amount of money to be allocated by the enterprise c is: 14.7=58.8 × 25%. In the price holding matching mode 43, after the matching subsystem 40 matches the purchase information of the enterprise a, the enterprise b, and the enterprise c, the remaining sales intelligence contracts 32 on the blockchain 30 are as shown in table 6, 40 passes remain for the sales intelligence contract 32 with the unit price of 0.18, and 240 passes remain for the sales intelligence contract 32 with the unit price of 0.20. Through the matching of the matching subsystem 40 in the price-stabilizing matching mode 43, the certified price rises from 0.10 to 0.18, and the rising range is smaller than that of the instant matching mode.

TABLE 6 Intelligent contract for sale 32 after price suppression match mode match

Unit price of	Number of general certificates
		0.18	40
0.20	240

The unit price of the actual buying and buying pass certificate of the enterprise B and the enterprise C is 0.147 ten thousand yuan/ton, which is lower than the unit price limit price of the two enterprises by 0.18 ten thousand yuan and 0.2 ten thousand yuan, thus saving partial fund. The saved funds can be used to scale up production or continue to improve energy efficiency. The method meets the aim of encouraging the enterprises B and C to expand the production scale under the control and discharge system. Meanwhile, the enterprise A does not obtain extra carbon emission rights, so that the production can be carried out only according to the free carbon emission right amount directly distributed by a competent organization, the production scale is limited, and the enterprise A is forced to reduce the production scale or improve process equipment.

In the instant match mode, the business armor can obtain additional carbon emission rights by participating in market trading more actively, i.e., submitting purchasing information at the earliest. Meanwhile, the cost of acquiring extra carbon emission rights of the enterprise B and the enterprise C is increased, and the unit price of the carbon emission rights is increased rapidly. This is inconsistent with the regulatory objective and is the case of a failure of market regulation. Thus, when a lower unit price carbon emission right is purchased in large quantities, the price stabilizing match pattern 43 is triggered, and the effectiveness of market regulation is maintained by the price stabilizing match pattern 43.

Referring to fig. 4, the method for determining whether the price fluctuation of the transaction unit exceeds the threshold includes: step B01), the matching subsystem 40 sets a price monitoring period, and when the price monitoring period is finished, the matching subsystem 40 obtains all transaction unit prices and corresponding evidence transaction amounts in the price monitoring period; step B02) arranging the transaction unit prices in descending order, calculating the total number of the pass-certificate transactions, and respectively obtaining a head transaction unit price interval and a tail transaction unit price interval which are used for ordering the preset percentage of the head and tail transaction-certificate transaction amount in the total number; step B03) taking the number of the deals as the weight, respectively recording the weighted average of the deal unit price in the head deal unit price interval and the tail deal unit price interval as a head average value and a tail average value; step B04) if the difference value between the head mean value and the tail mean value is larger than the preset threshold value, judging that the transaction unit price fluctuation exceeds the preset threshold value.

A block chain-based carbon emission right trading method using the block chain-based carbon emission right trading system as described above, referring to fig. 5, comprising: step C01) synchronizing the registration information of the enterprises and the initial carbon emission rights of the enterprises from the administrative department, establishing virtual accounts on the blockchain 30 for each enterprise, issuing a certificate on the blockchain 30, and transferring the certificate corresponding to the initial carbon emission rights of the enterprises to each enterprise virtual account; step C02) receiving the hang-up information of the enterprise, the hang-up information includes the amount of the certificate, the unit price and the virtual account of the seller, issuing the intelligent contract 32 for sale on the blockchain 30 for the hang-up information, the intelligent contract 32 for sale includes the amount of the certificate, the unit price, the virtual account of the seller and the purchase table, when the purchase table of the intelligent contract 32 for sale is filled in the purchase amount and the purchase virtual account, the intelligent contract 32 for sale verifies whether the digital assets with the same value are transferred to the virtual account of the intelligent contract 32 for sale, if the verification is passed, the corresponding amount of the certificate is transferred to the purchase virtual account, when the certificate of the intelligent contract 32 for sale is completely sold, the intelligent contract 32 for sale is destroyed; step C03) receiving the purchasing information of the enterprise, wherein the purchasing information comprises the certified purchasing quantity, the unit price limit and the buyer virtual account, reading the selling intelligent contract 32 existing on the block chain 30 in real time, matching the selling intelligent contract 32 and the purchasing information, filling a purchasing list corresponding to the selling intelligent contract 32 according to the matching result, and transferring the digital assets with corresponding value into the virtual account for selling the intelligent contract 32.

And receiving combined purchase information of the enterprise, wherein the combined purchase information comprises a plurality of accredited purchase amounts, a plurality of unit price limits and a buyer virtual account, the accredited purchase amounts and the unit price limits are in one-to-one correspondence, and when the combined purchase information is matched, only one group of accredited purchase amounts and the unit price limits are committed. An alternative embodiment of the purchase information provided for this example is shown in table 7. Each business fills in the amount of the vouched-for purchase at a plurality of unit price limits. The benefit of the enterprise A under the unit carbon emission is not high, so the demand of the enterprise A is rapidly reduced along with the increase of the general evidence unit price. The requirement of the enterprise B for passing the evidence slowly decreases along with the increase of the unit price of the passing the evidence. The enterprise C has less emission and high benefit, so the evidence-passing requirement of the enterprise C is not sensitive to the change of the evidence-passing unit price. Multiple sets of accredited purchase amounts and unit price limits in the purchase information, and only one set obtains a deal.

When the instant matching mode is used according to the purchase information shown in table 7, the company a is first matched. At a unit price limit of 0.1, the sales intelligence contracts 32 on the blockchain 30 are insufficient to obtain a deal for the 300-0.1 set, and are insufficient to obtain a deal for the 200-0.12 set of certified purchase amounts and unit price limits. But can make 100-0.15 group of pass purchase amount and unit price limit obtain deal, so the matching subsystem 40 makes 100 passes according to the unit price not more than 0.15 ten thousand yuan. Finally, 100 certificates are purchased for the enterprise A, and the actual purchase amount is as follows: 10.8=0.1 × 60+0.12 × 40, the actual purchase price is 0.108 ten thousand yuan. The number of certificates purchased by the enterprise A is further reduced relative to the purchase information shown in Table 4, forcing the enterprise A to scale down, or improving process equipment. The reason for this is that the purchase information shown in table 7 reveals a demand law that the demand rapidly decreases when the business a increases the voucher price. The requirement rule reveals the fact that the obtained production benefit is not high when the unit carbon of the enterprise A is discharged. It is desirable to control enterprise a to obtain additional carbon emissions. By means of the embodiment, the extra carbon emission right acquired by the enterprise A can be effectively inhibited. And the implementation of energy conservation and emission reduction is promoted. At this time, business B will obtain 300 passes at a price of not higher than 0.15 ten thousand yuan, and business C will obtain 100 passes at a price of 0.18 ten thousand yuan.

Using the price flat matchmaking model 43, business a would receive 40 passes, and business b and business c would receive 300 and 100 passes, respectively, according to the purchase information shown in table 7. After matching, the lowest certified unit price on the blockchain 30 is 0.18 ten thousand yuan. As can be seen, the price can be stabilized by using a method including a plurality of certified purchase amounts and a plurality of unit price limit purchase information. Even its price-stabilizing effect is equivalent to that of the price-stabilizing match pattern in some cases. However, in the price-hold matching mode, the amount of money to be paid is smaller for the business b and the business c, which have higher energy efficiency. The enterprise with higher energy utilization efficiency saves more funds for purchasing the carbon emission right and expands the competitive advantages of the enterprise.

TABLE 7 Purchase information

Numbering	698506	698507	698508
				General evidence purchase quantity-unit price limit	300-0.1	400-0.1	100-0.1
General evidence purchase quantity-unit price limit	200-0.12	350-0.12	100-0.12
				General evidence purchase quantity-unit price limit	100-0.15	300-0.15	100-0.15
General evidence purchase quantity-unit price limit	40-0.18	300-0.18	100-0.18
				General evidence purchase quantity-unit price limit	0-0.20	200-0.20	100-0.20
Buyer virtual account	0xE538DA…5EE6FD8	0xC2F5E6…71A435D	0xD8E538…5EE2C94

When the price fluctuation of the deal order does not exceed a preset threshold value, the real-time matching mode is used for matching, and when the price fluctuation of the deal order exceeds the preset threshold value, the price stabilizing matching mode is used for matching. Referring to fig. 6, the method for matching using the instant matching mode includes: step D01), receiving the purchasing information of the enterprise, inquiring the selling intelligent contracts 32 on the block chain 30, and trying to obtain all selling intelligent contracts 32 with the unit price not higher than the unit price limit of the purchasing information; step D02), if the corresponding intelligent contract 32 is not obtained, periodically re-trying; step D03) if at least one intelligent contract 32 is obtained, arranging the obtained intelligent contracts 32 according to the ascending order of unit price; step D04) matching the selling intelligent contracts 32 with the purchasing information according to the sequence until the matching amount meets the general purchasing amount in the purchasing information; step D05) when the acquired selling intelligent contracts 32 are completely matched and still cannot satisfy the certified purchase amount, periodically re-attempting to acquire the matched selling intelligent contracts 32.

Referring to fig. 7, the method for matching using the price-stabilizing matching mode includes: step E01) dividing the transaction time into a plurality of matching periods, receiving and storing the purchase information; step E02), after the matching period is finished, reading the stored purchase information at the finishing time of the matching period; step E03) finding a trading price so that the purchase information having a price limit higher than the trading price and the intelligent contract for sale 32 having a price lower than the trading price are all matched, the purchase information having a price limit equal to the trading price or the intelligent contract for sale 32 having a price equal to the trading price are all matched; step E04) the transaction price is such that the number of pass matched is the largest; step E05) calculating the total selling price of the negotiable certificates of the matching transaction, calculating the negotiable certificate transaction quantity of each enterprise, and apportioning the total selling price according to the negotiable certificate transaction quantity ratio of the enterprises.

The substantial effect of the embodiment is as follows: the method has the advantages that the general certificate is issued on the block chain 30, and the carbon emission right transaction process is tracked by means of the general certificate, so that the carbon emission right transaction process is real, credible, transparent and traceable, management of a supervisor is facilitated, supervision of the public is facilitated, and carbon emission right performance of a control enterprise can be promoted; by means of a price stabilizing and matching mode, excessive fluctuation of price is avoided, speculative behaviors on a carbon emission right trading market are inhibited, not only can the benefits of enterprises participating in control and emission be protected, but also the robustness of a market adjusting mechanism can be enhanced, the condition of avoiding market adjusting failure is reduced, the fairness of carbon emission right performance is maintained, and the development of enterprises with high energy utilization efficiency is promoted.

Example two:

a block chain-based carbon emission right transaction system is characterized in that when a matching subsystem 40 enters a price stabilizing matching mode, purchase information joint filling orders are provided for enterprises, each purchase information joint filling order comprises N filling orders, N is not less than 3, each filling order comprises a plurality of corresponding voucher purchase amount filling columns, a plurality of unit price limit filling columns and a buyer virtual account filling column, each unit price limit filling column corresponds to the N corresponding voucher purchase amount filling columns, and the unit price limit filling columns of the N filling orders are synchronized in content. Referring to fig. 8, the method includes: step F01) the matching subsystem 40 periodically matches N enterprises for joint filling of purchase information joint filling sheets, binds a filling sheet for each enterprise, and writes the virtual accounts of the enterprises into the buyer virtual account filling column of the filling sheet; step F02) filling unit price limit contained in the preset interval in a unit price limit filling column of the filling order, issuing purchase information joint filling orders to N enterprises, and informing the IP addresses of the joint filling enterprises to the N enterprises; step F03), after the enterprise obtains the purchase information joint filling sheet, the program automatically generates random numbers to fill the corresponding filling sheet general evidence purchase amount filling columns of other enterprises in the purchase information joint filling sheet; step F04), establishing communication among enterprises, obtaining random numbers filled in the corresponding voucher purchase quantity filling columns of the enterprises by other enterprises, summing the random numbers, recording the sum as a random sum, and displaying the random sum in the corresponding voucher purchase quantity filling columns with the same unit price limit; step F05) the enterprise determines the actual amount of the corresponding voucher purchase under each unit price limit, subtracts the random from the actual amount of the voucher purchase to obtain a filling value, and fills the filling value into the corresponding filling column of the amount of the voucher purchase; step F06) the enterprise calculates the sum of the numerical values of the certified purchase quantity filling columns of all filled orders under each unit price limit, records the sum as the number of hung orders of the unit price limit, and reports the unit price limit related to the number of hung orders to the matching subsystem 40; the matching subsystem 40 obtains a transaction price that allows purchase information that maximizes the number of passes matched and has a price limit equal to the transaction price to be fully matched. The matching subsystem 40 calculates the total selling price amount of the pass of the matched transaction, and distributes the total selling price amount according to the account ratio of the hung amount of each enterprise. The enterprises share the allocated amount again according to the corresponding evidence purchase quantity ratio which is recorded by the purchase information joint filling bill and is the same as the transaction unit price. After re-allocation, the enterprise will be allocated capital expenditures that match its actual demand.

Due to the adoption of the purchase information of a plurality of accreditation purchase quantity and unit price limit pairs, other enterprises can reversely deduce the production quantity of the enterprises through the current accreditation unit price. The production plan of the enterprise can be exposed, the business secrets of the enterprise are revealed to a certain extent, and the enterprise is exposed to operational risks. Therefore, technical solutions are needed to protect the production planning information of the enterprise. In the embodiment, on the basis of the first embodiment, the operation secret of the enterprise is protected by adopting a purchase information joint filling sheet mode.

In this embodiment, N =3, the matching subsystem 40 binds a filling sheet to the enterprise a, the enterprise b, and the enterprise c, and sets a unit price for selling the intelligent contract 32 on the current block chain 30 on the filling sheet, where the filling sheet is the filling sheet a, the filling sheet b, and the filling sheet c. The units prices for which the sell intelligent contracts 32 on blockchain 30 co-occur are 0.1, 0.12, 0.15, 0.18, and 0.2, and these units are filled in with the unit price limit of the fill sheet, as shown in table 8. Then, the purchase information joint filling sheet shown in table 8 is sent to the enterprise a, the enterprise b and the enterprise c, and respective IP addresses are notified to the three enterprises, so that the programs can establish communication with each other.

Table 8 matching purchase information joint filling order issued by the subsystem 40

	Filling sheet nail	Fill in the form B	Filling sheet C
				Unit price limit of 0.1
Unit price limit of 0.12
				Unit price limit of 0.15
Unit price limit of 0.18
				Unit price limit of 0.2
Buyer virtual account	0xE538DA…5EE6FD8	0xC2F5E6…71A435D	0xD8E538…5EE2C94

As shown in table 9, table 10, and table 11, after receiving the purchase information joint filling order for the enterprise a, the enterprise b, and the enterprise c, respectively, the program automatically generates random numbers to fill the filling orders except the filling order a. And then the enterprise A, the enterprise B and the enterprise C respectively obtain filling values according to the requirements of the enterprises A, the enterprises B and the enterprises C. The filling value and the random sum are added to be equal to the actual requirements of the enterprise. If the actual demand of the enterprise A under the condition that the unit price limit is 0.1 ten thousand yuan is 300, and the random numbers generated at the corresponding positions of the enterprise B and the enterprise C are 100 and 120 respectively, the generated filling value is 80, and the brackets in the table 9 represent the filling value. And the enterprise A generates filling values of other unit price limits. And the enterprise B and the enterprise C perform the same operation to obtain the filling values of all unit price limits.

TABLE 9 Business A Purchase information Allocation List

	Filling sheet nail	Fill in the form B	Filling sheet C
				Unit price limit of 0.1	(80)	250	130
Unit price limit of 0.12	(20)	180	60
				Unit price limitValue 0.15	(20)	140	35
Unit price limit of 0.18	(5)	90	15
				Unit price limit of 0.2	(-40)	85	25
Buyer virtual account	0xE538DA…5EE6FD8	0xC2F5E6…71A435D	0xD8E538…5EE2C94

TABLE 10 Purchase info syndication for Enterprise B

	Filling sheet nail	Fill in the form B	Filling sheet C
				Unit price limit of 0.1	100	(40)	60
Unit price limit of 0.12	80	(90)	75
				Unit price limit of 0.15	60	(40)	85
Unit price limit of 0.18	15	(140)	30
				Unit price limit of 0.2	10	(50)	10
Buyer virtual account	0xE538DA…5EE6FD8	0xC2F5E6…71A435D	0xD8E538…5EE2C94

TABLE 11 Enterprise C Purchase information Allocation List

	Filling sheet nail	Fill in the form B	Filling sheet C
				Unit price limit of 0.1	120	110	(-90)
Unit price limit of 0.12	100	80	(-35)
				Unit price limit of 0.15	20	120	(-20)
Unit price limit of 0.18	20	70	(55)
				Unit price limit of 0.2	30	65	(65)
Buyer virtual account	0xE538DA…5EE6FD8	0xC2F5E6…71A435D	0xD8E538…5EE2C94

After all filling values are obtained, the enterprises sum the corresponding certified purchase amounts with the same unit price limit in the purchase information joint filling bill as the number of the hanging bills with the corresponding unit price limit. As shown in table 12, the number of tickets reported to the matching subsystem 40 for enterprise a, enterprise b, and enterprise c. As shown in table 12, the information is reported to the matching subsystem 40, so that the relation between the production scale of the enterprise and the unit price of the carbon emission right can be hidden, and the operation privacy of the enterprise can be protected. The matching subsystem 40 makes all the purchase information having a price limit equal to the price of the transaction be matched, and calculates the sum of the number of purchase and purchase passes under each price limit. For example, a unit price limit of 0.1 ten thousand yuan, the sum is 800 according to Table 12. The actual requirements of the enterprise A, the enterprise B and the enterprise C are matched, and the actual requirements of the enterprises are shown in a table 7. Therefore, the purchase information joint filling bill does not influence the definition of the transaction unit price. Referring to tables 3 and 12, the transaction unit price obtained was 0.8 ten thousand yuan. After matching according to the transaction unit price, the matching subsystem 40 requires the enterprise to allocate the amount according to the proportion of the number of the hung orders. The total purchase amount is: 66=0.1 × 60+0.12 × 80+0.15 × 120+0.18 × 180. The amount of money shared by the enterprise A is as follows: 16.5=66 (110/440), and the amount allocated by business b is: 27.75=66 (185/440), the amount of the corporate feed is: 21.75=66 (145/440).

The enterprise A calculates the proportion of 16.5 ten thousand yuan, namely the enterprise A, the enterprise B and the enterprise C, which need to be borne according to the table 9. Business a needs to bear 16.5 x 5/110, business b needs to bear 16.5 x 90/110, and business c needs to bear 16.5 x 15/110. And the enterprise B calculates the proportion of 27.75 ten thousand yuan, namely the enterprise A, the enterprise B and the enterprise C, which need to be borne according to the table 10. Business a needs to bear 27.75 × 15/185, business b needs to bear 27.75 × 140/185, and business c needs to bear 27.75 × 30/185. And calculating the proportion of the enterprise A, the enterprise B and the enterprise C in 21.75 ten thousand yuan according to the table 11. Business a needs to bear 21.75 × 20/145, business b needs to bear 21.75 × 70/145, and business c needs to bear 21.75 × 55/145. And the enterprise A, the enterprise B and the enterprise C can settle accounts mutually. The final amount of the enterprise A expenditure is as follows: 6=16.5 × 5/110+27.75 × 15/185+21.75 × 20/145, i.e. the enterprise nail needs to share 6 ten thousand yuan. Enterprise b and enterprise c are 45 ten thousand yuan and 15 ten thousand yuan, respectively. In line with the ratios between the actual requirements reported in table 7. Therefore, the technical scheme for matching and settling based on the purchase information joint filling sheet provided by the embodiment can meet the requirement of the evidence-based transaction of the enterprise.

TABLE 12 overhead amount of enterprises

	Enterprise first hang singular quantity	Amount of the enterprise's second hanging singular	Enterprise third hang singular quantity
				Unit price limit of 0.1	460	200	140
Unit price limit of 0.12	260	245	145
				Unit price limit of 0.15	195	185	120
Unit price limit of 0.18	110	185	145
				Unit price limit of 0.2	70	70	160
Buyer virtual account	0xE538DA…5EE6FD8	0xE538DA…5EE6FD8	0xE538DA…5EE6FD8

Referring to fig. 9, a block chain-based carbon emission right trading method for receiving purchase information when matching using a price stabilizing matching mode includes: step G01) providing purchase information joint filling forms for enterprises, wherein the purchase information joint filling forms comprise N filling forms, N is more than or equal to 3, the filling forms comprise a plurality of corresponding voucher purchase quantity filling fields, a plurality of unit price limit filling fields and buyer virtual account filling fields, each unit price limit filling field corresponds to the N corresponding voucher purchase quantity filling fields, and the unit price limit filling fields of the N filling forms are synchronous in content; step G02) periodically matching N enterprises to carry out joint filling of purchase information joint filling sheets, binding a filling sheet for each enterprise, and writing virtual accounts of the enterprises into buyer virtual account filling columns of the filling sheets; step G03) unit price limit contained in the preset interval is filled in a unit price limit filling column of the filling order, a purchase information joint filling order is issued to N enterprises, and the IP address of the joint filling enterprise is notified to the N enterprises; step G04), after the enterprise obtains the purchase information joint filling sheet, the program automatically generates random numbers to fill the corresponding filling sheet general evidence purchase amount filling columns of other enterprises in the purchase information joint filling sheet; step G05), communication is established among enterprises, random numbers filled in the corresponding voucher purchase quantity filling columns of the filled orders of the enterprises by other enterprises are obtained and summed, the sum is recorded as a random sum, and the random sum is displayed in the corresponding voucher purchase quantity filling columns with the same unit price limit; step G06) the enterprise determines the actual amount of the corresponding voucher purchase under each unit price limit, subtracts the random from the actual amount of the voucher purchase to obtain a filling value, and fills the filling value into the corresponding filling column of the amount of the voucher purchase; and G07) the enterprise calculates the sum of the numerical values of the general evidence purchase amount filling columns of all filled orders under each unit price limit, records the sum as the number of hung orders of the unit price limit, and reports the number of hung orders associated with the unit price limit. The transaction unit price is obtained such that the purchase information that the number of passes matched is the largest and the unit price limit is equal to the transaction unit price is matched in its entirety.

Compared with the embodiment, the method and the device for realizing the carbon emission rights trading have the advantages that the purchase information of the carbon emission rights of the enterprises can be kept secret by using the purchase information joint filling sheet, so that the operating secret of the enterprises is protected, the information is prevented from being used for market speculation, and the healthy operation of the carbon emission rights trading market is promoted.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims

1. A block chain-based carbon emission right trading system is characterized in that,

comprises a synchronization subsystem, a sheet hanging subsystem and a matching subsystem,

the synchronization subsystem synchronizes the registration information of the enterprises and the initial carbon emission rights of the enterprises from a competent department, establishes a virtual account on a block chain for each enterprise, issues a pass certificate on the block chain, and transfers the pass certificate which is consistent with the initial carbon emission rights of the enterprises for each enterprise virtual account;

the hang-order subsystem receives hang-order information of an enterprise, the hang-order information comprises a certification amount, a unit price and a seller virtual account, the hang-order subsystem issues a sale intelligent contract for the hang-order information on a block chain, the sale intelligent contract comprises the certification amount, the unit price, the seller virtual account and a purchase table, the enterprise transfers the corresponding amount of certification to the virtual account of the sale intelligent contract, when the purchase table of the sale intelligent contract is filled with the purchase amount and the purchase virtual account, the sale intelligent contract verifies whether digital assets with the same value are transferred to the virtual account of the sale intelligent contract, if the verification is passed, the corresponding amount of certification is transferred to the purchase virtual account, and when the certification of the sale intelligent contract is completely sold, the sale intelligent contract is destroyed;

the matching subsystem receives purchase information of an enterprise, wherein the purchase information comprises a certified purchase amount, a unit price limit and a buyer virtual account, the matching subsystem reads a selling intelligent contract existing on a block chain in real time, matches the selling intelligent contract and the purchase information, fills a purchase table corresponding to the selling intelligent contract according to a matching result, and transfers digital assets with corresponding values into the virtual account for selling the intelligent contract.

2. The block chain-based carbon emission right trading system according to claim 1,

the matching subsystem receives combined purchasing information of an enterprise, the combined purchasing information comprises a plurality of accredited purchasing quantities, a plurality of unit price limits and a buyer virtual account, the accredited purchasing quantities correspond to the unit price limits one by one, and only one group of accredited purchasing quantities and the unit price limits are paid when the combined purchasing information is matched.

3. The block chain-based carbon emission right trading system according to claim 1 or 2,

the matching subsystem includes an instant matching mode and a price flat matching mode,

when the matching system is in an instant matching mode, the matching subsystem receives purchase information of an enterprise, inquires intelligent selling contracts on a block chain, tries to obtain all intelligent selling contracts of which the unit price is not higher than the unit price limit of the purchase information, periodically retries if the intelligent selling contracts are not obtained, if at least one intelligent selling contract is obtained, arranges the obtained intelligent selling contracts according to the ascending order of the unit price, matches the intelligent selling contracts with the purchase information according to the sequence until the matching amount meets the certified purchase amount in the purchase information, and periodically retries to obtain the consistent intelligent selling contracts if the obtained intelligent selling contracts cannot meet the certified purchase amount after all the matching;

when the matching system is in a price stabilizing matching mode, the matching subsystem divides transaction time into a plurality of matching periods, receives and stores purchase information, after the matching periods are ended, the matching subsystem reads the stored purchase information at the ending moment of the matching periods, the matching subsystem searches for transaction unit prices, so that the purchase information with unit price limit higher than the transaction unit price and intelligent selling contracts with price lower than the transaction unit price are all matched, the purchase information with unit price limit equal to the transaction unit price or the intelligent selling contracts with price equal to the transaction unit price are all matched, the transaction unit price enables the number of the pass matched to be the largest, the matching subsystem calculates the total price of the pass matched, calculates the number of the pass matched with each enterprise, and the enterprises share the total price according to the ratio of the number of the pass matched with each other;

the matching subsystem monitors matching transaction prices, enters a price stabilizing matching mode when the fluctuation of the transaction prices exceeds a preset threshold value, and returns to an instant matching mode after a preset time length.

4. The block chain-based carbon emission right trading system according to claim 3,

when the matching subsystem searches for the bargaining unit price, the following steps are executed:

arranging the read purchase information in a descending order according to unit price limit, reading all sold intelligent contracts on the current block chain, arranging the sold intelligent contracts in an ascending order according to unit price, and setting unit prices for inspecting the unit prices to traverse the sold intelligent contracts;

counting the total number of all the certificates of the intelligent sale contracts with the unit price not higher than the unit price for investigation, recording the total number of the certificates as the sale, counting the sum of the total amount of the certificates of all the purchase information with the unit price limit equal to the unit price for investigation, recording the sum as the purchase, and recording the smaller value of the total amount of the sale and the purchase as the amount of the certificates of the passage under the unit price for investigation;

the unit price under investigation with the largest amount of transaction is the final transaction unit price.

5. The block chain-based carbon emission right trading system according to claim 3,

the matching subsystem counts the sum of the total evidence purchase quantity of all the purchase information with the unit price limit equal to the unit price of the transaction, records the sum as the total purchase quantity, reads the total evidence purchase quantity of the purchase information of each enterprise at the unit price of the transaction, calculates the ratio of the total evidence purchase quantity of each enterprise to the total purchase quantity, records the ratio as the purchase quantity of the enterprise, and takes the product of the total purchase quantity and the purchase quantity ratio of the enterprise as the total evidence transaction quantity of the enterprise.

6. The block chain-based carbon emission right trading system according to claim 3,

when the matching subsystem enters a price stabilizing matching mode, a purchase information joint filling bill is provided for an enterprise, the purchase information joint filling bill comprises N filling bills, N is more than or equal to 3, the filling bill comprises a plurality of corresponding evidence purchase quantity filling columns, a plurality of unit price limit filling columns and buyer virtual account filling columns, each unit price limit filling column corresponds to the N corresponding evidence purchase quantity filling columns, the unit price limit filling columns of the N filling bills are synchronous in content,

the matching subsystem periodically matches N enterprises for joint filling of purchase information joint filling orders, binds a filling order for each enterprise, writes virtual accounts of the enterprises into buyer virtual account filling columns of the filling orders, fills unit price limit included in a preset interval in the unit price limit filling columns of the filling orders, issues purchase information joint filling orders to the N enterprises, notifies the IP addresses of the joint filled enterprises to the N enterprises, automatically generates a random number by a program after the enterprises obtain the purchase information joint filling orders, fills the corresponding evidence purchase amount filling columns of other enterprises in the purchase information joint filling orders, establishes communication among the enterprises, obtains and sums the random numbers filled in the corresponding evidence purchase amount filling columns of the filling orders of the enterprises by the other enterprises, records the random numbers as a random sum, displays the random sum in the corresponding evidence purchase amount filling columns of the same unit price limit, and the enterprises determine the actual through purchase amount under each unit price limit, subtracting the random sum from the actual amount of the certified purchase to obtain a filling value, filling the filling value into a corresponding certified purchase amount filling column, calculating the sum of the numerical values of all the certified purchase amount filling columns of the filled orders under each unit price limit by the enterprise, recording the sum as the number of the hung orders of the unit price limit, and reporting the unit price limit related to the hung number to the matching subsystem by the enterprise;

the matching subsystem obtains a transaction price that allows purchase information that maximizes the number of passes matched and has a price limit equal to the transaction price to be fully matched.

7. The block chain-based carbon emission right trading system according to claim 3,

the matching subsystem sets a price monitoring period, when the price monitoring period is finished, the matching subsystem obtains all transaction unit prices and corresponding pass transaction amounts in the price monitoring period, arranges the transaction unit prices in a descending order, calculates the total number of pass transaction amounts, respectively obtains a head transaction unit price interval and a tail transaction unit price interval which are used for ordering the preset percentage of the head and tail pass transaction amount in the total number, respectively records the weighted average values of the transaction unit prices in the head transaction unit price interval and the tail transaction unit price interval as a head mean value and a tail mean value respectively by taking the pass transaction amount as a weight, and judges that the transaction unit price fluctuation exceeds a preset threshold value if the difference value of the head mean value and the tail mean value is greater than a preset threshold value.

8. A blockchain-based carbon emission right trading method using the blockchain-based carbon emission right trading system according to claim 1 or 2, comprising:

synchronizing the registration information of the enterprises and the initial carbon emission rights of the enterprises from a competent department, establishing a virtual account on a block chain for each enterprise, issuing a pass certificate on the block chain, and transferring the pass certificate which is consistent with the initial carbon emission rights of the enterprises to each virtual account of the enterprise;

receiving the coupon information of an enterprise, wherein the coupon information comprises a general amount, a unit price and a seller virtual account, issuing a sale intelligent contract for the coupon information on a block chain, the sale intelligent contract comprises the general amount, the unit price, the seller virtual account and a purchase table, when the purchase table of the sale intelligent contract is filled with the purchase amount and the purchase virtual account, the sale intelligent contract verifies whether the digital assets with the same value are transferred to the virtual account of the sale intelligent contract, if the verification is passed, the corresponding amount of the general certificate is transferred to the purchase virtual account, and when the general certificate of the sale intelligent contract is completely sold, the sale intelligent contract is destroyed;

the method comprises the steps of receiving purchase information of an enterprise, wherein the purchase information comprises a certified purchase amount, a unit price limit and a buyer virtual account, reading a selling intelligent contract existing on a block chain in real time, matching the selling intelligent contract with the purchase information, filling a purchase table corresponding to the selling intelligent contract according to a matching result, and transferring digital assets with corresponding values into the virtual account for selling the intelligent contract.

9. The block chain-based carbon emission right trading method according to claim 8,

receiving combined purchase information of an enterprise, wherein the combined purchase information comprises a plurality of accredited purchase amounts, a plurality of unit price limits and a buyer virtual account, the accredited purchase amounts and the unit price limits are in one-to-one correspondence, and when the combined purchase information is matched, only one group of accredited purchase amounts and the unit price limits are paid;

when the price fluctuation of the transaction order does not exceed a preset threshold value, using an instant matching mode to match, and when the price fluctuation of the transaction order exceeds the preset threshold value, using a price stabilizing matching mode to match;

the method for matching by using the instant matching mode comprises the following steps:

the method comprises the steps of receiving purchase information of an enterprise, inquiring selling intelligent contracts on a block chain, trying to obtain all selling intelligent contracts of which the unit price is not higher than the unit price limit of the purchase information, periodically re-trying if the selling intelligent contracts are not obtained to be consistent with the selling intelligent contracts, obtaining at least one selling intelligent contract, arranging the obtained selling intelligent contracts according to the unit price in an ascending order, matching the selling intelligent contracts and the purchase information according to the sequence until the matching amount meets the certified purchase amount in the purchase information, and periodically re-trying to obtain the consistent selling intelligent contracts if the obtained selling intelligent contracts are not met after all matched with the certified purchase amount;

the method for matching by using the price stabilizing matching mode comprises the following steps:

dividing the transaction time into a plurality of matching periods, receiving and storing purchase information, reading the stored purchase information at the end of the matching period after the matching period is ended, searching for the transaction unit price, enabling the purchase information with the unit price limit higher than the transaction unit price and the intelligent sale contract with the price lower than the transaction unit price to be completely matched, enabling the purchase information with the unit price limit equal to the transaction unit price or the intelligent sale contract with the price equal to the transaction unit price to be completely matched, enabling the transaction unit price to enable the number of pass documents matched to be the largest, calculating the total sale price of the pass documents matched to the transaction, calculating the pass transaction number of each enterprise, and allocating the total sale price according to the pass transaction number.

10. The block chain-based carbon emission right trading method according to claim 9,

the method for receiving purchase information when matching by using the price stabilizing matching mode comprises the following steps:

providing a purchase information joint filling-up bill for an enterprise, wherein the purchase information joint filling-up bill comprises N filling-up bills, N is more than or equal to 3, the filling-up bill comprises a plurality of corresponding voucher purchase quantity filling-up fields, a plurality of unit price limit filling-up fields and a buyer virtual account filling-up field, each unit price limit filling-up field corresponds to the N corresponding voucher purchase quantity filling-up fields, the contents of the unit price limit filling-up fields of the N filling-up bills are synchronous,

periodically matching N enterprises to perform joint filling of purchase information joint filling orders, binding a filling order for each enterprise, writing virtual accounts of the enterprises into buyer virtual account filling columns of the filling orders, filling unit price limit included in a preset interval in the unit price limit filling columns of the filling orders, issuing purchase information joint filling orders to the N enterprises, notifying the IP addresses of the joint filling enterprises to the N enterprises, automatically generating random numbers by a program after the enterprises obtain the purchase information joint filling orders to fill corresponding general evidence purchase amount filling columns of the filling orders of other enterprises in the purchase information joint filling orders, establishing communication among the enterprises, obtaining random numbers filled in the general evidence purchase amount filling columns of the filling orders of the other enterprises corresponding to the enterprises by the other enterprises, summing the random numbers, marking as random sum, displaying the random sum in the corresponding general evidence purchase amount filling columns of the same unit price limit, and determining the actual general evidence purchase amount of the enterprises under each unit price limit, subtracting the random sum from the actual accredited purchase quantity to obtain a filling value, filling the filling value into a corresponding accredited purchase quantity filling column, calculating the sum of the numerical values of the accredited purchase quantity filling columns of all filled orders under each unit price limit by the enterprise, recording the sum as the number of hung orders of the unit price limit, and reporting the unit price limit related to the hung number by the enterprise.