CN114358749A - A system and method for fast transaction of encrypted currency based on merchant alliance - Google Patents

Abstract

The invention discloses a rapid transaction system and a rapid transaction method for cryptocurrency based on a merchant alliance. The data module provides a data structure foundation for the merchant alliance transaction method. The commercial tenant alliance module provides alliance establishing service for market managers and alliance joining service for commercial tenants. The chip transaction module uses a chip mechanism to provide daily transaction services for merchants and consumers. The flexible settlement module decouples the settlement of the merchant from the settlement of the consumer, and provides transaction settlement service for the merchant and the consumer. The state synchronization module provides a consumer chip information synchronization service for the merchant and helps the merchant to acquire the latest chip information. According to the invention, a new merchant alliance system is established, extra funds do not need to be paid by two transaction parties, the block chain transaction procedure fee in the transaction is reduced, and technical support is provided for the use of the cryptocurrency in the daily payment field.

Description

A system and method for fast transaction of encrypted currency based on merchant alliance

technical field

The invention belongs to the technical field of block chain, relates to an encrypted currency transaction system and method, and in particular relates to a merchant alliance-based encrypted currency fast transaction system and method.

Background technique

Blockchain-based cryptocurrencies have extremely high market caps in the market, with a total market cap of over $3 trillion as of November 2021. As a currency, it can naturally play a role in the payment field. Payment giant PayPal announced that it will allow users to pay merchants with cryptocurrencies. Dell, steam, and Tesla also accept bitcoin payments. However, due to the problems of the blockchain itself, steam and Tesla subsequently announced that they would stop accepting bitcoin as a payment method. There are also few trading markets that accept cryptocurrencies in everyday life.

Extending the use of cryptocurrencies to everyday payments is still difficult, and current blockchains have the following limitations:

High latency for payment confirmation.

High fees, also known as blockchain network transaction fees. The blockchain network is jointly maintained by many distributed nodes, who are responsible for packaging transactions and sending them to neighboring network nodes to ensure the openness and transparency of information. Nodes will pay a certain amount of resources when packaging transactions and broadcasting these information, so when users conduct transactions, each transaction will pay an additional transaction fee.

In the actual payment scenario, the merchant needs to complete the consumer payment confirmation within 2 seconds. In addition, since the daily payment scenarios are often high-frequency small-value transactions, sometimes the transaction fee is higher than the transaction amount. For both parties, the high-cost transaction fee is obviously unacceptable. However, there are very few existing solutions to deal with this optimization.

Some existing solutions try to transfer the on-chain payment behavior to the off-chain to solve the problem of high latency of payment confirmation. In the state channel, both parties of the transaction pay the transaction deposit fee in advance, then conduct the transaction under the chain, update the state of both parties, and finally summarize and settle on the chain. However, since the establishment of the state channel takes a certain amount of time, if the consumer wants to shorten the payment confirmation time, the consumer must establish a state channel with all potential transaction objects in advance, and lock the deposit in each channel, which undoubtedly improves the cryptocurrency’s use in the market. The usage threshold in daily payment scenarios.

In response to this problem, the literature proposes a certain optimization of the Snappy scheme. This scheme forms an alliance between merchants. Consumers only need to deposit a certain amount of security deposit in advance, and in subsequent transactions, ensure that the total amount of unlisted transactions is guaranteed. The amount is less than the deposit. At the same time, in order to prevent consumers from colluding with merchants, Snappy requires merchants to deposit the same amount of deposit. However, in the trade market, there are a large number of consumers, and each merchant has a large amount of funds used as a security deposit, which increases the financial pressure of the merchants.

In summary, the application of cryptocurrencies in daily payment scenarios needs to meet the following requirements: a) Merchants can confirm that they can receive transaction funds in a short period of time. b) Neither merchants nor consumers need to prepare additional funds. c) Reduce transaction fees as much as possible.

SUMMARY OF THE INVENTION

In order to realize the fast transaction of encrypted currency, the present invention proposes a system and method for fast transaction of encrypted currency based on merchant alliance.

The technical scheme adopted by the system of the present invention is: a fast transaction system of encrypted currency based on merchant alliance, comprising a data module, a merchant alliance module, a chip transaction module, a flexible settlement module and a state synchronization module; each module has specific content, Perform corresponding functions to jointly provide fast cryptocurrency transaction services;

The data module is used to store consumer status data and merchant status data, the consumer status data includes the current transaction status and remaining funds of the consumer, and the merchant status data includes the current amount of funds that the merchant can withdraw; The consumer status data is updated and maintained by the consumer and the merchant, and the merchant status data is updated and maintained by the smart contract;

The merchant alliance module is used to provide market managers and merchants with alliance establishment and joining services, and to form alliance relationships between merchants who have cryptocurrency transaction needs, so that consumers only need to form a status channel with the alliance, and then they can communicate with the alliance. Any merchant in the country can complete fast transactions and shorten payment confirmation time;

The chip transaction module is used to provide daily transaction services for merchants and consumers. The module uses chips to represent consumers' capital transactions. The merchants use the chips to determine whether the remaining funds of the consumers are sufficient to complete the transaction. Consumers do not need to pay additional funds;

The flexible settlement module is used to provide transaction settlement services for merchants and consumers. The module realizes separate settlement between consumers and merchants by decoupling the settlement process of merchants and consumers. It provides more flexible settlement methods for both parties. Reduce the number of blockchain transaction settlements, thereby reducing blockchain transaction fees;

The state synchronization module is used to provide the merchant with the consumer chip information synchronization service, including the transaction state synchronization information and the settlement state synchronization information, the module helps the merchant to obtain the latest chip information, and ensures that the merchant can judge whether the transaction is based on the latest chip information. able to proceed.

The technical scheme adopted by the method of the present invention is: a method for fast transaction of encrypted currency based on merchant alliance, including the process of merchant alliance construction, chip transaction, flexible settlement and state synchronization;

The construction of the merchant alliance includes the following steps:

(1) Market managers deploy and create smart contracts in the cryptocurrency fast trading system;

(2) The smart contract randomly creates public and private keys to ensure the reliability of the data;

(3) The smart contract creates the initial merchant state Sig, and Sig represents the smart contract signature;

(4) The merchant sends a joining application to the smart contract, accompanied by the merchant's signature and account address;

(5) After the smart contract verifies the signature, update the merchant status (Sig,(pk _i ,0)), and use the account address as the merchant identifier; where pk _i represents the public key of the merchant i, and 0 represents the withdrawable funds of the merchant i ;

(6) The smart contract will sign the merchant status related to the merchant and send it to the corresponding merchant for verification.

Compared with the prior art, the advantages and positive effects of the present invention are mainly reflected in the following aspects:

(1) The present invention designs a new type of merchant alliance scheme, which forms an alliance between merchants with cryptocurrency transaction requirements, which can effectively shorten the payment confirmation delay.

(2) The present invention designs a chip transaction mechanism, using the chip mechanism to replace the existing margin mechanism, so that users no longer need to prepare additional funds, and lower the threshold for the use of encrypted currency in daily payments.

(3) The present invention designs a flexible settlement mechanism, which decouples consumer settlement from merchant settlement, temporarily stores the funds obtained from merchant transactions in the smart contract, and completes merchant settlement and transfer only when the merchant needs to withdraw funds. Reduce the number of blockchain transactions and reduce blockchain transaction fees.

Description of drawings

Fig. 1 is the system principle diagram of the present invention;

Fig. 2 is the overall frame diagram of the system of the present invention;

3 is a flowchart of a merchant alliance method in an embodiment of the present invention;

4 is a flowchart of a chip transaction method in an embodiment of the present invention;

5 is a flowchart of a flexible settlement method in an embodiment of the present invention;

FIG. 6 is a flowchart of a state synchronization method in an embodiment of the present invention.

Detailed ways

In order to facilitate the understanding and implementation of the present invention by those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention, not The invention is limited.

Please refer to FIG. 1 and FIG. 2 , a merchant alliance-based fast transaction system for encrypted currency provided by the present invention includes a data module, a merchant alliance module, a chip transaction module, a flexible settlement module, and a state synchronization module; the data module is used for encryption The currency fast transaction system provides the data foundation; the merchant alliance module is used to provide alliance recommendations and joining services for market managers and merchants; the chip transaction module is used to provide traders with cryptocurrency fast transaction services, using consumer status records in the transaction process. The transaction status of consumers, the merchant judges whether the remaining funds of the consumer are enough to support the transaction according to the status of the consumer; the flexible settlement module is used to provide more convenient settlement services for consumers and merchants, and solve the settlement between consumers and merchants. Coupling, the funds obtained by merchant transactions are temporarily stored in the smart contract, and the merchant settlement transfer is completed only when the merchant needs to withdraw funds, thereby reducing the number of blockchain transactions and reducing the transaction fee of the blockchain; the state synchronization module is used in the The consumer status is synchronized between merchants, smart contracts and users, the latest consumer status is synchronized during transactions, and the smart contract is informed of the latest consumer status during settlement.

In this embodiment, the data module is used to provide a data structure basis for the merchant alliance transaction method, defines the data format in the method, including two data structures of consumer status and merchant status, and provides a data structure basis for the cryptocurrency transaction method, It is used to record the transaction status of all parties and provide data support for transactions and settlements. Among them, the consumer status records the current transaction situation and the remaining funds situation of the consumer. During the transaction, the merchant judges whether the consumer's remaining funds are sufficient to support the transaction based on the latest consumer status, and the smart contract completes the fund allocation based on the consumer's status during settlement. Consumer status is updated and maintained jointly by consumers and merchants. The consumer status records the current amount of funds that each merchant can withdraw. Merchant status is maintained by smart contract updates.

The invention provides a method for fast transaction of encrypted currency based on merchant alliance, which includes the process of merchant alliance establishment, chip transaction, flexible settlement and state synchronization.

Referring to Figure 3, in this embodiment, the merchant alliance is constructed, with a total of n merchants, and the specific process includes the following steps:

Step 1: Market managers deploy and create smart contracts in the cryptocurrency fast trading system;

The smart contract used in this embodiment is an existing blockchain technology, which is executable code written in the blockchain, and can be regarded as a trusted executor.

Step 2: The smart contract randomly creates a public and private key to ensure the reliability of the data.

Step 3: The smart contract creates the initial merchant state (Sig), and Sig represents the smart contract signature.

Step 4: The market merchant sends a joining application to the smart contract, along with the merchant's signature and account address.

Step 5: After the smart contract verifies the signature, update the merchant status (Sig, (pk _i , 0)), and use the account address as the merchant identifier; where pk _i represents the public key of the merchant i, and 0 represents the withdrawable funds of the merchant i .

Step 6: The smart contract signs the merchant status related to the merchant and sends it to the corresponding merchant for verification.

Referring to Figure 4, the chip transaction in this embodiment, the specific process includes the following steps:

Step 1: The consumer sends a signature to the smart contract and transfers the estimated spending funds V.

Step 2: The smart contract creates the corresponding initial consumer state (Sig, V, 0, ..., 0), indicating that the consumer's remaining funds are V, and the transaction amount with other merchants is 0, and the initial consumer state is signed, To prevent malicious users from falsifying consumer status;

The chip in this embodiment is the consumer state.

Step 3: The smart contract synchronizes the consumer status with the merchant.

Step 4: When the consumer pays V _j to the merchant i, the consumer updates the status of the consumer, which needs to be updated including the remaining amount of the consumer and the transaction amount of the corresponding merchant. After the update, the status of the consumer is (Sig, VV _j , 0, ..., V _j , ..., 0), and sign the consumer state;

Step 5: The merchant verifies the latest consumer status, determines whether the change in the remaining amount of the consumer is equal to the change in the amount of the consumer, and at the same time ensures that only the funds of the merchant and the consumer have changed.

Please refer to Fig. 5, the state synchronization of this embodiment, the specific process includes the following steps:

Step 1: The transaction merchant broadcasts the consumer status to other merchants.

Step 2: Other merchants verify the consumer status.

Step 3: The user sends the latest consumer status to the smart contract.

Step 4: The smart contract verifies the latest consumer status.

Referring to Figure 6, the flexible settlement in this embodiment, the specific process includes the following steps:

Step 1: The consumer sends a settlement application to the smart contract.

Step 2: The status of the smart contract is securely synchronized during settlement, and the consumer status is judged according to the principle of majority;

In this embodiment, according to the principle of majority, the merchants in the alliance send the consumer status to the smart contract. Since the honest merchants in the alliance account for the majority (here is a security assumption), the smart contract can obtain the correct consumer status.

Step 3: The smart contract returns the consumer's remaining funds to the consumer.

Step 4: The smart contract updates the merchant state according to the consumer state (Sig, (pk ₁ ,0),...,(pk _i ,V _j ),...,(pk _n ,0));

Step 5: The smart contract sends the new merchant status to the corresponding merchant for confirmation.

Step 6: The merchant submits a settlement application to the smart contract.

Step 7: After the merchant's application is verified, the smart contract transfers money to the merchant according to the merchant's status.

Step 8: The smart contract updates the merchant status (Sig,(pk ₁ ,0),…,(pk _n ,0)).

The present invention can provide:

1. Merchant alliance method: This method connects merchants who have cryptocurrency transaction needs in the market into an alliance. It can effectively shorten the payment confirmation delay.

2. Chip transaction method: It is used to provide traders with fast cryptocurrency transaction services. During the transaction process, the consumer status is used to record the consumer's transaction status. The merchant judges whether the consumer's remaining funds are sufficient to support the transaction according to the consumer's status. trade.

3. Flexible settlement method: It is used to provide more convenient settlement services for consumers and merchants, decouple consumer settlement from merchant settlement, and temporarily store funds obtained from merchant transactions in smart contracts. Only when merchants need to withdraw funds, Merchant settlement transfer is completed, thereby reducing the number of blockchain transactions and reducing blockchain transaction fees.

4. State synchronization method: It is used to synchronize consumer status between merchants, smart contracts and users, synchronize the latest consumer status during transactions, and let smart contracts know the latest consumer status during settlement.

It should be understood that the above description of the preferred embodiments is relatively detailed, and therefore should not be considered as a limitation on the protection scope of the patent of the present invention. In the case of the protection scope, substitutions or deformations can also be made, which all fall within the protection scope of the present invention, and the claimed protection scope of the present invention shall be subject to the appended claims.

Claims (5)

1. A rapid transaction system of cryptocurrency based on merchant alliance is characterized in that: the system comprises a data module, a merchant alliance module, a chip transaction module, a flexible settlement module and a state synchronization module;

the data module is used for storing consumer state data and merchant state data, the consumer state data comprises the current transaction condition and the remaining fund condition of the consumer, and the merchant state data comprises the amount of funds which can be taken out by the merchant at present; the consumer state data is updated and maintained by a consumer and a merchant together, and the merchant state data is updated and maintained by an intelligent contract;

the merchant alliance module is used for providing alliance establishing and adding services for market managers and merchants, forming alliance relations among merchants with encrypted currency transaction requirements, and enabling consumers to complete rapid transactions with any merchant in an alliance only by forming a state channel with the alliance;

the chip transaction module is used for providing transaction service for the merchant and the consumer, the chip represents the fund transaction condition of the consumer, the merchant uses the chip to judge whether the residual fund of the consumer is enough to complete the transaction, and the consumer does not need to pay extra fund;

the flexible settlement module is used for providing transaction settlement service for merchants and consumers, and the consumer and the merchants are separately settled by decoupling the merchant settlement and the consumer settlement process;

the state synchronization module is used for providing a consumer chip information synchronization service for the merchant, the consumer chip information synchronization service comprises state synchronization information during transaction and state synchronization information during settlement, the merchant acquires the latest chip information, and whether the transaction can be carried out or not is judged according to the latest chip information.

2. A rapid encrypted currency transaction method based on merchant alliance is characterized in that: the method comprises the processes of merchant alliance construction, chip transaction, flexible settlement and state synchronization;

the merchant alliance construction specifically comprises the following steps:

(1) a market manager deploys and creates an intelligent contract in the cryptocurrency rapid transaction system;

(2) the intelligent contract randomly creates a public key and a private key for ensuring the reliability of data;

(3) the intelligent contract creates an initial merchant state Sig, and the Sig represents an intelligent contract signature;

(4) a merchant sends a joining application to an intelligent contract, and is accompanied with a merchant signature and an account address;

(5) after the intelligent contract verifies the signature, the state of the merchant (Sig, (pk) is updated_i0)), the account address as the merchant identifier; wherein, pk_iA public key representing the merchant i, 0 representing the extractable funds of the merchant i;

(6) the intelligent contract sends the merchant state signature related to the merchant to the corresponding merchant for verification.

3. The merchant alliance-based cryptocurrency fast transaction method according to claim 2, wherein the chip transaction is realized by the following steps:

(1) the consumer sends a signature to the intelligent contract and transfers the fund V with the predicted expense;

(2) the intelligent contract creates a corresponding initial consumer state (Sig, V,0, …,0) which represents that the residual fund of the consumer is V and the transaction amount with other merchants is 0, and signs the initial consumer state to prevent a malicious user from falsifying the consumer state; the consumer status is a chip;

(3) the intelligent contract synchronizes the consumer state to the merchant;

(4) payment V from consumer to merchant i_jThen, the consumer updates the consumer state including the residual amount of the consumer and the transaction amount of the corresponding merchant, and the updated consumer state is (Sig, V-V)_j,0,…,V_j…,0) and signs the consumer status;

(5) the merchant verifies the latest consumer state, judges whether the variation value of the residual amount of the consumer is equal to the variation value of the amount of the consumer, and simultaneously ensures that only the funds of the merchant and the consumer are changed.

4. The merchant alliance-based cryptocurrency fast transaction method as claimed in claim 2, wherein the state synchronization is implemented by the following steps:

(1) the transaction merchant broadcasts the consumer state to other merchants;

(2) other merchants verify the consumer status;

(3) the user sends the latest consumer state to the intelligent contract;

(4) the smart contract verifies the latest consumer status.

5. The merchant alliance-based cryptocurrency fast transaction method as claimed in claim 2, wherein the flexible settlement comprises the following steps:

(1) the consumer sends a settlement application to the intelligent contract;

(2) the state is safe and synchronous when the intelligent contract is settled, and the state of the consumer is judged according to a majority principle;

(3) the intelligent contract returns the residual funds of the consumer to the consumer;

(4) the intelligent contract updates the state of the merchant (Sig, (pk) according to the state of the consumer₁,0)，…，(pk_i,V_j)，…，(pk_n,0))；

And 5: the intelligent contract sends the new merchant state to the corresponding merchant for confirmation;

step 6: the merchant makes settlement application to the intelligent contract;

and 7: after the merchant application and verification pass, the intelligent contract transfers accounts to the merchant according to the merchant state;

and 8: intelligent contract updating commercial tenant state (Sig, (pk)₁,0),…,(pk_n,0))。

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