CN114154980B - Multi-party bidding digital asset transaction system and method based on intelligent contract - Google Patents
Multi-party bidding digital asset transaction system and method based on intelligent contract Download PDFInfo
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- CN114154980B CN114154980B CN202110802954.4A CN202110802954A CN114154980B CN 114154980 B CN114154980 B CN 114154980B CN 202110802954 A CN202110802954 A CN 202110802954A CN 114154980 B CN114154980 B CN 114154980B
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- G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
- G06Q20/401—Transaction verification
- G06Q20/4014—Identity check for transactions
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Abstract
The invention provides a multi-party bidding digital asset transaction system and method based on intelligent contracts, comprising at least four types of participation roles: the system comprises a seller, a buyer, a transaction platform side and a supervision side, wherein the seller comprises a seller client interaction end, a seller transaction end and a seller settlement end, the buyer comprises a buyer client interaction end, a buyer transaction end and a buyer settlement end, the transaction platform side comprises a transaction platform side client interaction end, a transaction platform side transaction end and a transaction platform side settlement end, and the supervision side comprises a supervision side client interaction end, a supervision side transaction end and a supervision side settlement end; the system allows a plurality of exchanges, a plurality of financial institutions and a plurality of supervision units to finish the transactions on the model, each transaction party firstly searches for required intelligent contracts in an intelligent contract library of the platform through an interface provided by the transaction platform party, if the required intelligent contract library is not searched, the transaction party is required to register and provide the intelligent contracts by itself, and the platform operates different intelligent contracts to realize the requirements of the transactions.
Description
Technical Field
The invention belongs to the technical field of intelligent contracts, and particularly relates to a multi-party bidding digital asset transaction system and method based on intelligent contracts.
Background
The "Smart contracts" technology was developed by NikeSabo in 1994, indicating that the terms of the contract could be actively performed. After 20 years of silence, ethernet used the term in 2012 or so, the code running on the blockchain system is considered to be a "smart contract" regardless of whether the code is a contract term. But after The day event in 2016 people began to pay attention to The smart contract technology and considered The need to combine with law, and ethernet in 2018 also acknowledged that The term smart contract was not appropriate at The beginning.
Furthermore, the united kingdom in 2020 proposes that smart contracts or other software may have the following uses: including checking the authenticity of the customer (i.e. "know your customer, know Your Customer, KYC), checking whether the transaction is compliant, completing the settlement, and completing the Anti-Money Laundering (AML). But these intelligent contracts or software are provided by the uk-wide line and are only passively accepted by customers.
Because of the financial market, there may be multiple digital asset exchanges, multiple financial institutions and a small number of regulatory authorities. These institutions all have their needs. According to the conventional smart contract platform, clients can only accept smart contracts provided by service providers. In a mutually untrusted environment, this is not a good design and choice. Prior art blockchain systems use consensus mechanisms to maintain fairness. In case the smart contract code and blockchain system are provided by the service provider, only the consensus mechanism is insufficient. For example, the buyer and seller interests conflict with each other, the buyer pays the lowest price, and the seller gets the highest price. If the transaction intelligence contract is provided by the buyer, the seller may feel that the buyer code is unfair; if provided by the seller, the buyer may also suspect fairness of the contract; if provided by the platform party, both the buyer and the seller may be suspected of fairness. Some digital asset trading platform parties trade cheating, so that both buyers and sellers are deficient, for example, when in expansion, the platform party buys digital assets earlier than the client party, and when in falling, the platform party sells digital assets earlier than the client or leaves the machine empty.
Accordingly, there is a need to design a new model of digital asset trading to support digital asset trading in a fair and efficient smart contract context.
Disclosure of Invention
The invention provides a multi-party competitive digital asset transaction system and method based on intelligent Contracts, which are a novel intelligent contract platform, wherein a plurality of intelligent Contracts can be combined with a plurality of block chains on the platform, and a named LSO (Ledgers ledger System, smart contacts intelligent contract System, oracle props) model is adopted, so that the design breaks a mechanism that the traditional intelligent Contracts can only be in dead binding with one ledger System (block chain), and a new framework is additionally provided, wherein part of intelligent Contracts are used for KYC, part of transaction execution and part of settlement execution. On the basis of the novel intelligent contract platform, a novel intelligent contract model is provided, different organizations or units in the model provide respective intelligent contracts to form intelligent contract groups, and the intelligent contract groups cooperate on one hand, but are also in a mutually game at the same time to form a competing relationship. The new model allows multiparty units to provide own intelligent contract codes, intelligent contracts provided by each unit mainly give priority to the demands of the unit, the whole transaction platform is provided with intelligent contracts by all parties to complete transactions together, and the transaction comprises a supervision party and can be completed only by participation of the intelligent contracts of the participation party. So that the overall financial market can be fairer. Meanwhile, the novel exchange execution model can automatically find out proper intelligent contract execution.
The invention aims to provide a multi-party bidding digital asset transaction system based on intelligent contracts, which comprises at least four types of participation roles, wherein the four types of participation roles are as follows: the system comprises a seller, a buyer, a transaction platform side and a supervision side, wherein the seller comprises a seller client interaction end, a seller transaction end and a seller settlement end, the buyer comprises a buyer client interaction end, a buyer transaction end and a buyer settlement end, the transaction platform side comprises a transaction platform side client interaction end, a transaction platform side transaction end and a transaction platform side settlement end, and the supervision side comprises a supervision side client interaction end, a supervision side transaction end and a supervision side settlement end; the multi-party bidding digital asset transaction system based on intelligent contracts allows a plurality of exchanges, a plurality of financial institutions and a plurality of supervision units to complete transactions on a model, wherein the buyers and sellers belong to the financial institutions or transaction parties, the transaction platform parties comprise the exchanges, the supervision parties belong to the supervision units, each transaction party firstly searches required intelligent contracts in an intelligent contract library of a platform through an interface provided by the transaction platform parties, if the required intelligent contract library is not found, the transaction party is required to register and provide the intelligent contracts by itself, and the platform runs different intelligent contracts to realize the transaction requirements, wherein the intelligent contracts of the buyers are responsible for verifying the authenticity of the assets of the sellers and can transact or not; the seller's smart contract is responsible for verifying the authenticity of the buyer's funds and the reliability of the source of the funds; the intelligent contract provided by the transaction platform side processes transaction, so that fairness and transparency to all participants are ensured in the transaction flow; the supervision party provides intelligent contracts to ensure that the buyer, the seller and the transaction platform party do not cheat, do not launder money and conduct honest transactions.
Preferably, the seller client interaction end checks the authenticity of the buyer and the authenticity of the funds provided by the buyer; the seller transaction end needs to ensure that the transaction flow is fair, no cheating behavior exists in the transaction, and the seller can obtain the highest value; the seller settlement end ensures that funds safely flow into the designated account.
Preferably, the buyer client interaction end checks the true identity of the seller and the authenticity of the asset provided by the seller; the buyer transaction end needs to ensure that the transaction flow is fair, no cheating behavior exists in the transaction, and the buyer only needs to provide the minimum value; the buyer's clearing house ensures that the asset flows securely into the designated digital asset account.
Preferably, the transaction platform side client interaction end checks the true identities of the buyer and the seller and the true identities of funds and assets; the transaction platform side transaction end guarantees fair transaction flow, cheating in transaction is avoided, the buyer pays the lowest price, and the seller obtains the highest price; the settlement end of the transaction platform side ensures that the participants all receive the same transaction information.
Preferably, the supervision side client interaction end checks the true identities of the buyers and sellers, checks whether money laundering behaviors exist or not, and ensures transaction integrity; the supervision side transaction end needs to ensure that the transaction flow is fair and no cheating behavior exists in the transaction; the supervisor clearing terminal ensures that funds safely flow into the seller-designated account and that assets safely flow into the buyer-designated digital asset account.
The invention also aims to provide a multi-party bidding digital asset transaction method based on the intelligent contract, which comprises the following three steps:
(1) Identity verification and digital asset validation;
(2) Digital asset transactions;
(3) Transaction settlement and money back-flushing.
Wherein, the three steps need to complete the competition of the intelligent contracts provided by the four parties, and the intelligent contracts of the buyer are responsible for verifying the authenticity of the assets of the seller, and whether the assets can be traded or not; the seller's smart contract is responsible for verifying the authenticity of the buyer's funds and the reliability of the source of the funds; the intelligent contract of the transaction platform side is used for complex verification of the identity, the authenticity and the asset certainty of sellers and buyers; the transaction flow is fair and transparent; the supervision party is responsible for guaranteeing that the transaction parties do not cheat, do not launder money and are honest.
Preferably, the client interaction ends of the transaction seller, the buyer, the transaction platform party and the supervision party firstly inquire the required identity verification intelligent contract in the platform intelligent contract library, and if the required identity verification intelligent contract is found, the client interaction ends are directly and automatically executed; otherwise, issuing an authentication intelligent contract. The buyer and the seller exchange identity information and submit the identity information to the transaction platform side and the supervisor for identity verification, and the transaction process can be carried out only when the square intelligent contract obtains a correct result.
Preferably, after waiting for the correct results fed back by the seller, buyer, transaction platform side and supervisor side transaction terminals, the transaction seller, buyer, transaction platform side and supervisor side client interaction terminals firstly inquire the required transaction intelligent contracts in the platform intelligent contract library, and if the required transaction intelligent contracts are found, the transaction intelligent contracts are directly and automatically executed; otherwise, each transaction party issues a transaction intelligent contract; the buyer pays a certain amount according to the terms in the transaction intelligent contract, the seller provides contracted assets according to the terms in the transaction intelligent contract, the buyer and the seller ensure that the transaction is strictly executed according to the terms in the intelligent contract, meanwhile, the transaction platform side and the supervision side transaction end strictly operate the intelligent contract to detect whether the transaction flow is fair or not and whether cheating behaviors exist in the transaction according to the transaction data provided by the buyer and the seller, the transaction platform side transaction end also ensures that the buyer pays the lowest price, and the seller obtains the highest price; once any one of the parties finds that there is dishonest behavior in the transaction, the transaction is terminated immediately.
Preferably, the transaction seller, buyer, transaction platform side and supervisor settlement end wait for the transaction end to process, firstly inquire the required settlement intelligent contract in the platform intelligent contract library, and if found, directly and automatically execute; otherwise, each transaction party issues a settlement intelligent contract; and then, each party carries out transaction result settlement, wherein the settlement comprises a buyer settlement end for confirming that the asset of the seller is correctly transferred to the name of the buyer, a seller settlement end for confirming that the funds of the buyer are correctly transferred to the account of the seller, a transaction platform party settlement end for ensuring that the participants all receive the same transaction information, and a supervisor settlement end for confirming that the flow direction of the asset of the two parties is correct, so that disputes do not exist in the transaction.
Preferably, the settlement ends of the transaction seller, the buyer, the transaction platform side and the supervision side return a transaction completion confirmation, the transaction flow can be ended, any one of the three steps finds that the transaction is fraudulent in the intelligent contract execution process in any one step, an error result is obtained, the transaction flow is immediately ended, and a new transaction flow can be started after square negotiation.
The invention has the beneficial effects that:
under the multiparty intelligent contract transaction model, transaction is allowed to customize intelligent contracts by transaction parties according to different participation roles, the model is responsible for the execution of the intelligent contracts and the interaction of data among different intelligent contracts, the maximum transaction freedom degree of a client is provided, the fairness and the reliability of the transaction are judged by a seller, a buyer, a transaction platform party and a supervisor party at all times in the transaction process, and the transaction flow can be immediately terminated once the behavior which does not accord with the regulation of contract clauses is found.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in view of the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a diagram of a multi-party smart contract transaction framework in accordance with the present invention;
FIG. 2 is a schematic diagram of a multiparty smart contract transaction in accordance with the present invention;
fig. 3 is a diagram of a trading platform according to the present invention for accommodating smart contracts offered by other parties.
Detailed Description
In order that the invention may be more readily understood, reference will now be made to the following description of the invention taken in conjunction with the accompanying drawings and examples. In the following description, numerous specific details and specific examples are set forth in order to provide a thorough understanding of the present invention and to provide a thorough and complete understanding of the present invention to those skilled in the art. While this invention is susceptible of embodiment in many other forms than those described herein, those skilled in the art will be able to make and use the invention without departing from the spirit of the invention, and therefore the invention is not limited by the specific examples and figures disclosed below.
In the following description, numerous specific details and specific examples are set forth in order to provide a thorough understanding of the present invention and to provide a thorough and complete understanding of the present invention to those skilled in the art. While this invention is susceptible of embodiment in many other forms than those described herein, those skilled in the art will be able to make and use the invention without departing from the spirit of the invention, and therefore the invention is not limited by the specific examples and figures disclosed below.
Referring to fig. 1, the present embodiment is based on a smart contract multi-party bidding digital asset trading system, allowing multiple exchanges, multiple financial institutions, multiple regulatory units to complete a trade on the trading system. The transaction system involves at least four parties, namely a seller, a buyer, a transaction platform party and a supervisor. Wherein, the buyer and the seller belong to financial institutions or transaction parties, the transaction platform party comprises a transaction center, and the supervision party belongs to a supervision unit. Each transaction party first searches the intelligent contract library of the platform for the required intelligent contract through the interface provided by the transaction platform party. If the required intelligent contract library is not queried, the transaction party is required to register and provide intelligent contracts, and the transaction platform party operates different intelligent contracts to realize the transaction requirement:
buyer: the buyer's smart contract is responsible for verifying the authenticity of the seller's assets, whether they can transact;
seller: the seller's smart contract is responsible for verifying the authenticity of the buyer's funds and the reliability of the source of the funds;
transaction platform side: the intelligent contract provided by the platform side processes the transaction, so that fairness and transparency to all participants are ensured in the transaction flow;
supervisor: they provide intelligent contracts to ensure that transaction parties (buyers, sellers and transaction platform parties) do not cheat, do not launder money and are honest.
Some trading platform parties belong to the seller, so that the seller and the trading platform party are integrated; some trading platform parties belong to buyers, and under the environment, the buyers and the trading platform parties are integrated; in these special cases, there will be only three classes of participating roles in the model.
The multiparty cooperative intelligent contract transaction system of the embodiment is based on a multiparty cooperative intelligent contract transaction model, and comprises at least four types of participation roles, wherein the four types of participation roles are as follows: the system comprises a seller, a buyer, a transaction platform side and a supervisor, wherein the seller comprises a seller client interaction end, a seller transaction end and a seller settlement end, the buyer comprises a buyer client interaction end, a buyer transaction end and a buyer settlement end, the transaction platform side comprises a transaction platform side client interaction end, a transaction platform side transaction end and a transaction platform side settlement end, and the supervisor comprises a supervisor client interaction end, a supervisor transaction end and a supervisor settlement end.
Wherein the seller client interaction end verifies the authenticity of the buyer and the authenticity of the funds provided by the buyer; the seller transaction end needs to ensure that the transaction flow is fair, no cheating behavior exists in the transaction, and the seller can obtain the highest value; the seller settlement end ensures that funds safely flow into the designated account.
Wherein the buyer client interaction end verifies the authenticity of the seller and the authenticity of the asset provided by the seller; the buyer transaction end needs to ensure that the transaction flow is fair, no cheating behavior exists in the transaction, and the buyer only needs to provide the minimum value; the buyer's clearing house ensures that the asset flows securely into the designated digital asset account.
The transaction platform side client interaction end checks the true identities of the buyer and the seller and the authenticity of funds and assets; the transaction platform side transaction end guarantees fair transaction flow, cheating in transaction is avoided, the buyer pays the lowest price, and the seller obtains the highest price; the settlement end of the transaction platform side ensures that the participants all receive the same transaction information.
The supervision party client interaction end checks the true identities of the buyer and the seller, checks whether money laundering behaviors exist or not, and ensures the transaction integrity; the supervision side transaction end needs to ensure that the transaction flow is fair and no cheating behavior exists in the transaction; the supervisor clearing terminal ensures that funds safely flow into the seller-designated account and that assets safely flow into the buyer-designated digital asset account.
1. Function of intelligent contract in transaction flow
Referring to fig. 2, fig. 2 shows the functionality of the parties in the transaction flow. The general transaction flow is divided into three major steps:
(1) Identity verification and digital asset validation;
(2) Digital asset transactions;
(3) Transaction settlement and money back-flushing.
These 3 steps all require the completion of the intelligent contract race provided by the four parties.
The buyer's smart contract is responsible for verifying the authenticity of the seller's assets, whether they can transact;
the seller's smart contract is responsible for verifying the authenticity of the buyer's funds, as well as the authenticity of the source of the funds;
complex verification of seller and buyer identities, funds authenticity and asset certainty by the transaction platform side intelligent contract; the transaction flow is fair and transparent;
the supervision party is responsible for guaranteeing that the transaction parties do not cheat, do not launder money and are honest. Unlike traditional smart contract systems, in which smart contracts are provided by a single entity, other participants can only accept the terms specified by the contract and can only participate in the agreement of parameters in the contract. The patent model allows each party to provide intelligent contracts designed by the unit, and guarantees the benefit of the party.
As shown in the multiparty intelligent contract transaction framework diagram of fig. 2, a transaction seller, a buyer, a transaction platform side and a supervision side client interaction end firstly inquire the required identity verification intelligent contract in a platform intelligent contract library, and if the required identity verification intelligent contract is found, the intelligent contract is directly and automatically executed; otherwise, issuing an authentication intelligent contract. The buyer and the seller exchange identity information and submit the identity information to the transaction platform side and the supervisor for identity verification, and the transaction process can be carried out only when the square intelligent contract obtains a correct result.
After waiting for the correct results fed back by the seller, buyer, transaction platform side and supervisor client interaction side, the transaction seller, buyer, transaction platform side and supervisor client interaction side firstly inquire the required transaction intelligent contract in the platform intelligent contract library, and if the required transaction intelligent contract is found, the transaction intelligent contract is directly and automatically executed; otherwise, each transaction party issues a transaction intelligent contract. The buyer pays a certain amount according to the terms in the transaction intelligent contract, the seller provides contracted assets according to the terms in the transaction intelligent contract, the buyer and the seller ensure that the transaction is strictly executed according to the terms in the intelligent contract, meanwhile, the transaction platform side and the supervision side transaction end strictly operate the intelligent contract to detect whether the transaction flow is fair or not and whether cheating occurs in the transaction according to the transaction data provided by the buyer and the seller, the transaction platform side transaction end also ensures that the buyer pays the lowest price, and the seller obtains the highest price. Once any one of the parties finds that there is dishonest behavior in the transaction, the transaction is terminated immediately.
The transaction seller, the buyer, the transaction platform side and the supervision party settlement end wait for the transaction end to finish processing, firstly, inquiring a required settlement intelligent contract in a platform intelligent contract library, and if the settlement intelligent contract is found, directly and automatically executing; otherwise, each party of the transaction issues a settlement smart contract. And then, each party carries out transaction result settlement, wherein the settlement comprises a buyer settlement end for confirming that the asset of the seller is correctly transferred to the name of the buyer, a seller settlement end for confirming that the funds of the buyer are correctly transferred to the account of the seller, a transaction platform party settlement end for ensuring that the participants all receive the same transaction information, and a supervisor settlement end for confirming that the flow direction of the asset of the two parties is correct, so that disputes do not exist in the transaction.
The settlement ends of the transaction sellers, buyers, transaction platform parties and supervision parties return a transaction completion confirmation, and the transaction flow can be ended. Any party in the above steps finds that the transaction is fraudulent in the execution process of the intelligent contract in any step, and obtains an error result, the transaction flow is immediately terminated, and a new transaction flow can be started after square negotiation. Wherein table 1 is a mesh transaction model.
TABLE 1
| Intelligent contract for seller | Buyer intelligent contract | Transaction platform contracts | Supervision intelligent contract | |
| Customer interactions End of the device | Checking the true identity of the buyer Authenticity of funds | The true identity of the seller is checked, asset authenticity | The true identities of the buyer and the seller are checked, authenticity of funds and assets | Checking the true identity of the buyer and the seller, checking whether the buyer and the seller exist Money laundering, transaction integrity |
| Transaction terminal | Guaranteeing fair transaction flow without With cheating in transactions, obtaining Highest value | Guaranteeing the fairness of the transaction flow, there is no cheating in the transaction, pay the lowest price | Guaranteeing fair transaction flow, not in existence Cheating in transactions with minimal buyer payment Price, the seller gets the highest price | Guaranteeing fair transaction flow, and no transaction platform is operated Disadvantages and drawbacks |
| Settlement terminal | Ensuring safe inflow finger of funds Fixed account | Ensuring safe inflow finger of asset Digital asset account | Ensure that all the participants receive the same exchange Easy information | Ensuring safe flow of funds into a seller-designated account, the funds Secure flow of product into buyer-designated digital asset accounts |
2. Intelligent contract execution framework of transaction platform
Referring to fig. 3, the trading platform accommodates smart contract architecture diagrams provided by other parties. Any one party in the model may in practice have more than one institution. Assuming that there are m financial institutions (in a general case, one financial institution is a buyer or a seller in different transactions), N supervisors, and t exchanges, the parties conduct intelligent contract transactions under the platform, and the theoretical threshold value of the number of intelligent contracts, c=3× (m+n+t), i.e. the total number of intelligent contracts N is equal to or less than C N.
Each party may provide its own smart contracts to interoperate with the smart contracts of the trading platform party.
There may be repeated steps in the execution of the intelligent contracts provided by the parties, but the repetition is to ensure fairness and compliance of the transactions, excluding cheating. For example, the buyer would check the identity of the seller and the authenticity of the asset, the contemporaneous platform side smart contract would also check as well, and the supervisor would do the same. But the buyer is responsible for the interests of the buyer, the transaction platform party is responsible for the interests of the buyer, and the supervision party is responsible for the responsibilities of the buyer and has own rules.
The present invention relates to the issuance and interaction of transaction four-way smart contracts. The patent model allows a participant to issue an intelligent contract written by the participant on a blockchain according to different participation roles in transactions.
The buyer, the seller, and the supervising entity all provide intelligent contracts, which are aggregated on a trading platform.
Each transaction is executed, the platform side needs to dynamically invoke the relevant smart contracts, each automatically providing a transaction report to its own unit (e.g., the unit's blockchain system).
If executed, the platform side may continue to execute the transaction without the intelligent contract asset of the relevant unit, finding that the relevant unit has not yet provided the relevant intelligent contract; the platform party, or suspending the transaction, notifies the relevant units to provide the relevant smart contracts.
Allowing clients to issue different types of smart contracts based on their different persona identities. When a seller, buyer, transaction platform side, and supervisor of a transaction simultaneously execute intelligent contracts, a transaction flow can be started or continued to be executed.
This framework can be fully automated, and all provided intelligent contracts can be stored in a platform side intelligent contract (code) library, dynamically proposing execution.
The novel digital asset transaction model based on multiparty bidding of intelligent contracts of the embodiment allows a plurality of exchanges, a plurality of financial institutions and a plurality of supervision units to complete transactions on the model. The transaction party has at least four parties, namely a seller, a buyer, a transaction platform party and a supervision party. The buyer and the seller belong to financial institutions, the trading platform belongs to exchanges, and the supervision party belongs to supervision units. Financial institutions include banks, clearing houses, escrow units, etc., and regulatory units include witness, banking, notary, notarization, etc.
Examples: 2 digital asset exchanges now, 50 financial institutions (e.g., banks, securities, clearing houses, technological finance, etc.), 5 regulatory units (e.g., national witness, banking, local financial offices, etc.). Since the financial institution may be a buyer or a seller, it is necessary to prepare intelligent contracts for both parties. But different financial institutions are not well confident of each other, e.g., bank a and dealer B transactions, one being a buyer and one being a seller; but the roles may be different for another transaction.
The roles of the transaction four parties are as follows, respectively.
Digital asset exchange: preparing intelligent contracts of a platform side;
financial institution: preparing intelligent contracts of a buyer and a seller, wherein the intelligent contracts of the buyer are responsible for verifying the authenticity of assets of the seller (whether the assets are in compliance or not, and the like), and the seller is responsible for checking whether funds are in fact or not and the reliability of the sources of the funds;
transaction platform side: the intelligent contract provided by the platform side processes the transaction, so that fairness and transparency to all participants are ensured in the transaction flow;
supervisor: they prepare intelligent contracts to check each transaction, buyer (financial institution), seller (financial institution), transaction platform side (exchange) not cheating, not money laundering, honest transaction.
One transaction flow of one transaction is divided into three steps: 1) Identity verification and digital asset validation; 2) Digital asset transactions; 3) Transaction settlement and money back-flushing. These 3 steps all require the completion of the intelligent contract race provided by the tetragon.
Taking digital stocks as an example for the implementation of this patent, the seller and the platform party can be combined into one party in this embodiment. The buyer is a stock buyer, the seller and the platform party are securities exchanges, and the supervision party is a license contract. If a financial institution does not provide its own (buyer and seller) smart contracts, the platform or regulatory entity may refuse the financial institution to participate in all transactions at the exchange.
In the authentication step: the stock purchasers, the stock exchanges and the license authorities inquire or issue identity verification intelligent contracts through the client interaction end. The stock buyer waits for the institution information of the stock exchange; the stock exchange waits for identity information of the stock buyer; the supervisor waits for the identity information of the buyer and the seller. And after the verification of the three-party intelligent contract, only when the three-party client interaction end returns a correct verification result, the model carries out the next step of the transaction flow.
In the digital stock trading step, the model receives the result of the verification of the three parties and informs the stock buyer, the stock exchange and the license contract exchange end that the second step of the trade flow can be started, namely the trade asset transfer is completed. The three parties inquire or issue the transaction intelligent contract through the transaction terminal. The stock buyers pay a certain amount of funds according to the contract terms, ensuring that the funds accurately flow into the stock exchange account. The stock exchange converts the funds provided by the stock buyer and the price of the stock at the time into stock shares according to contract clauses, transfers the corresponding quantity of stock ownership, and ensures that the stock ownership is accurately transferred to the name of the stock buyer. The license contract detects whether the transaction flow is fair or not and whether cheating is generated in the transaction according to contract clauses, the trading end of the securities exchange also ensures that the buyer pays the lowest price, and the seller obtains the highest price. And the three-party intelligent contract execution is finished, a correct result is returned, and the model performs the next step of the transaction flow.
In the transaction settlement step, the model receives the result of the success of the three-party transaction, and informs the stock buyer, the securities exchange and the certificate authority end of the settlement to start the third step of the transaction flow, namely the settlement of the stock asset is completed. And the third party inquires or issues the settlement intelligent contract through the settlement terminal. The stock buyer settles the stock amount transferred to his own name according to the contract terms, confirming that the transaction is completed. The securities exchange settles funds obtained by the transaction according to contracts, confirms that the transaction is completed, and ensures that the participants all receive the same transaction information. The certificate authority confirms the correctness of the funds flow of the buyer and the seller according to the contract clause, and no fraud exists. And the three-party intelligent contract execution is finished, a transaction completion result is returned, and the model finishes the transaction flow if and only if a successful transaction result of a stock buyer, a stock exchange and a license is received.
In a preferred embodiment, in any one step in the transaction flow, if the execution of the smart contract by any party is problematic and the correct execution cannot be continued, the transaction flow ends. Three parties can restart a new transaction flow on the model after negotiation.
The safe storage strategy based on the blockchain technology is characterized in that firstly, after original data are encrypted, the data are segmented, the encrypted data are subjected to disorder and data mixing processing, and then are subjected to secondary encryption and are stored, so that the data security is greatly enhanced, and the data are almost impossible to steal. Compared with the patent technology in the prior art, besides the subdivision after the same encryption, a data chaotic mechanism is added, so that the decryption difficulty is greatly increased, the novel mechanism is characterized, the encryption algorithm is not changed at the same time, the design and the number of fragments of the original encryption for 2 times are not increased, but the difficulty of cracking is greatly increased, and the ciphertext is more unlikely to crack; and the scheme does not change the storage architecture of the distributed storage, only changes the storage strategy and the data organization form, so the cost and the expenditure are smaller.
While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It will be appreciated by those skilled in the art that changes and modifications may be made to the embodiments of the invention without departing from the scope and spirit thereof.
Claims (1)
1. A multi-party bidding digital asset trading system based on intelligent contracts, characterized by allowing a plurality of exchanges, a plurality of financial institutions, a plurality of regulatory units to complete a trade on the trading system; the method comprises at least four types of participation roles, wherein the four types of participation roles are as follows: the system comprises a seller, a buyer, a transaction platform side and a supervision side, wherein the seller comprises a seller client interaction end, a seller transaction end and a seller settlement end, the buyer comprises a buyer client interaction end, a buyer transaction end and a buyer settlement end, the transaction platform side comprises a transaction platform side client interaction end, a transaction platform side transaction end and a transaction platform side settlement end, and the supervision side comprises a supervision side client interaction end, a supervision side transaction end and a supervision side settlement end; the multi-party bidding digital asset transaction system based on intelligent contracts allows a plurality of exchanges, a plurality of financial institutions and a plurality of supervision units to complete transactions on a model, wherein the buyers and sellers belong to the financial institutions or transaction parties, the transaction platform parties comprise the exchanges, the supervision parties belong to the supervision units, each transaction party firstly searches required intelligent contracts in an intelligent contract library of a platform through an interface provided by the transaction platform parties, if the required intelligent contract library is not found, the transaction party is required to register and provide the intelligent contracts by itself, and the platform runs different intelligent contracts to realize the transaction requirements, wherein the intelligent contracts of the buyers are responsible for verifying the authenticity of the assets of the sellers and can transact or not; the seller's smart contract is responsible for verifying the authenticity of the buyer's funds and the reliability of the source of the funds; the intelligent contract provided by the transaction platform side processes transaction, so that fairness and transparency to all participants are ensured in the transaction flow; the supervision party provides intelligent contracts to ensure that the buyer, the seller and the transaction platform party do not cheat, do not launder money and conduct honest transactions; in this environment, the buyer and the transaction platform side are integral; in these special cases, there will be only three classes of participating roles in the model;
the seller client interaction end checks the authenticity of the buyer and the authenticity of the funds provided by the buyer; the seller transaction end needs to ensure that the transaction flow is fair, no cheating behavior exists in the transaction, and the seller can obtain the highest value; the seller settlement end ensures that funds safely flow into the appointed account;
the buyer client interaction end checks the true identity of the seller and the authenticity of the asset provided by the seller; the buyer transaction end needs to ensure that the transaction flow is fair, no cheating behavior exists in the transaction, and the buyer only needs to provide the minimum value; the buyer settlement end ensures that the assets safely flow into the appointed digital asset account;
the transaction platform side client interaction end checks the true identities of the buyer and the seller and the authenticity of funds and assets; the transaction platform side transaction end guarantees fair transaction flow, cheating in transaction is avoided, the buyer pays the lowest price, and the seller obtains the highest price; the settlement end of the transaction platform side ensures that the participants all receive the same transaction information;
the supervision side client interaction end checks the true identities of the buyer and the seller, checks whether money laundering behaviors exist or not, and ensures the transaction integrity; the supervision side transaction end needs to ensure that the transaction flow is fair and no cheating behavior exists in the transaction; the supervision party settlement end guarantees that funds safely flow into the seller-designated account and that assets safely flow into the buyer-designated digital asset account; the multi-party bidding digital asset transaction method based on the intelligent contract of the multi-party bidding digital asset transaction system based on the intelligent contract is characterized by comprising the following three steps:
(1) Identity verification and digital asset validation;
(2) Digital asset transactions;
(3) Transaction settlement and money back-flushing:
wherein, the three steps need to complete the competition of the intelligent contracts provided by the four parties, and the intelligent contracts of the buyer are responsible for verifying the authenticity of the assets of the seller, and whether the assets can be traded or not; the seller's smart contract is responsible for verifying the authenticity of the buyer's funds and the reliability of the source of the funds; the intelligent contract of the transaction platform side is used for complex verification of the identity, the authenticity and the asset certainty of sellers and buyers; the transaction flow is fair and transparent; the supervision party is responsible for guaranteeing that the transaction parties do not cheat, launder money and honest transactions;
the client interaction end of the transaction seller, the buyer, the transaction platform side and the supervision side firstly inquires the required identity verification intelligent contract in the platform intelligent contract library, and if the required identity verification intelligent contract is found, the client interaction end is directly and automatically executed; otherwise, issuing an authentication intelligent contract:
the buyer and the seller exchange identity information and submit the identity information to the transaction platform side and the supervisor for identity verification, and the transaction process can be carried out in the next step only when the square intelligent contract obtains a correct result;
after waiting for the correct results fed back by the seller, buyer, transaction platform side and supervisor side transaction end, firstly inquiring the required transaction intelligent contract in the platform intelligent contract library, and directly and automatically executing if the required transaction intelligent contract is found; otherwise, each transaction party issues a transaction intelligent contract; the buyer pays a certain amount according to the terms in the transaction intelligent contract, the seller provides contracted assets according to the terms in the transaction intelligent contract, the buyer and the seller ensure that the transaction is strictly executed according to the terms in the intelligent contract, meanwhile, the transaction platform side and the supervision side transaction end strictly operate the intelligent contract to detect whether the transaction flow is fair or not and whether cheating behaviors exist in the transaction according to the transaction data provided by the buyer and the seller, the transaction platform side transaction end also ensures that the buyer pays the lowest price, and the seller obtains the highest price; terminating the transaction immediately once any one of the parties finds that there is a dishonest transaction;
the transaction seller, the buyer, the transaction platform side and the supervision party settlement end wait for the transaction end to finish processing, firstly, inquiring a required settlement intelligent contract in a platform intelligent contract library, and if the settlement intelligent contract is found, directly and automatically executing; otherwise, each transaction party issues a settlement intelligent contract; then, each party carries out transaction result settlement, including a buyer settlement end confirms that the seller asset has been correctly transferred to the buyer name, the seller settlement end confirms that the funds of the buyer have been correctly transferred to the seller account, a transaction platform party settlement end ensures that all parties receive the same transaction information, a supervisor settlement end needs to confirm the correctness of the asset flow direction of the parties, and no disputes exist in the transaction;
the settlement ends of the transaction sellers, buyers, transaction platform parties and supervisory parties return transaction completion confirmation, the transaction flow can be ended, any party in the three steps finds that the transaction is fraudulent in the intelligent contract execution process in any step, an error result is obtained, the transaction flow is immediately ended, and a new transaction flow can be started after square negotiation; the method further comprises the steps of: the issuing and interaction of the transaction square intelligent contract, and according to different participation roles in the transaction, the participation party is allowed to issue the intelligent contract written by the party on the blockchain; wherein:
the buyer, the seller and the supervision units all provide intelligent contracts and are converged on a transaction platform;
when each transaction is executed, the platform side needs to dynamically mobilize related intelligent contracts, and each intelligent contract automatically provides a transaction report to a blockchain system of a unit of the platform side;
if executed, the platform side may continue to execute the transaction without the intelligent contract asset of the relevant unit, finding that the relevant unit has not yet provided the relevant intelligent contract; the platform side or pauses the transaction, and informs the relevant units to provide relevant intelligent contracts;
allowing clients to issue different types of intelligent contracts according to different role identities, and starting or continuing one transaction flow when a seller, a buyer, a transaction platform side and a supervisor of one transaction execute the intelligent contracts simultaneously;
the framework of issuing and interacting transaction tetragonal intelligent contracts can be fully automated, and intelligent contracts provided by all parties can be stored in a platform-side intelligent contract code library, so that issuing and interacting of the transaction tetragonal intelligent contracts can be dynamically carried out.
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