KR20190108521A - Smart contract system based on block chain and its method - Google Patents

Abstract

The present invention relates to a smart contract system based on a block chain and a method thereof. The smart contract system includes: an agent server which stores a hash table of a contract form having a reference and a script corresponding to characteristics of each index address and individual bucket, provides the hash table in response to a request, and adds a user identification key to the determined hash table to broadcast; and an arbitrator pool server which interlinks with the agent server, transmits a record of corresponding index address through the script to arbitrator terminals registered to the arbitrator pool, and collects responses for the record to transmit the same to the agent server to correspond to the index address. The agent server has a first database storing data of standard object and legitimacy examples including precedents for a setting item of the record, and suggests data of the first database and/or the response through the arbitrator pool server to the user terminal as a reference. According to the present invention, it is possible to increase a success rate of a contract by allowing a comparison example or an advice from an arbitrator to be reflected to a matter in which there is conflict of interest between actual contractors.

Description

Smart contract system based on block chain and its method

The present invention relates to a blockchain-based smart contract system and a method thereof, and more particularly, to a blockchain-based smart contract system based on security and transparency, which are advantages of blockchain, to support a quick and reasonable smart contract. It's about how.

In general, a contract is a written or spoken word or promise that sets forth the obligations of a legal effect between people or organizations involved in a shared issue or to obey each other.

At the very least, the parties to the contract are mutually equal in their responsibilities in meeting the objectives of the contract.

Fundamental to these contracts is to establish goals that the first contractor will achieve from the contract, and secondly limit the capabilities and behavior of each of the contracting parties (for example, the consultant is committed to providing expertise or skill and time, etc.). And the client commits to the commitment, including basic information and time and monetary responsibility, to implement each other), to clarify the limitations of the capabilities and conduct of the third party and to the fourth party. Commitments must be not only ethical, but also legitimate, specify restrictions between the fifth contracting party, and clarify the responsibilities of each of the sixth contracting party.

In addition, what should be considered in the above contract should be to clarify what causes the objection to be unpleasant at the time of conclusion of the contract, and to determine the cause thereof, and to fully realize the approach to problem solving.

Failure to meet the above considerations motivates the parties to transform or destroy the contract with each other.

As such, there may be conflicting interests between the contracting parties until the contract is concluded, and there is a problem that it takes a long time until the compromise or remains unreasonable and develops into a dispute.

Smart contracts, which focus on attention recently, allow the process of contract execution and verification to be handled directly without any intervention and additional cost by the person who checks the contract execution conditions by automation through the network. The contract is being made.

However, smart contracts using the general blockchain Ethereum as described above have the biggest advantage that no one can see the transaction contents because the transaction itself is anonymized.

In addition, smart contracts using general blockchain Ethereum have limitations in scalability because they are not compatible with existing trading systems.

International publication number WO 2017/145019 published 31 August 2017.

The present invention is limited in order to solve the problems of the prior art, specifically, based on the blockchain characteristics of securing security and transparency, and at the same time conflict of interest between actual contracting parties, The purpose of the present invention is to provide a blockchain-based smart contract system and a method thereof, which can increase the closing rate of the contract by reflecting the advice and prove that there is no forgery by distributing and storing the concluded contract in the blockchain.

A characteristic configuration of the blockchain-based smart contract system according to the present invention for achieving the above object, stores a hash table of the contract form having a reference and a script corresponding to the characteristics of each index address and individual bucket, An agent server provided in response to the request and broadcasting by including a user identification key in the determined hash table; An intermediary pool server interworking with the agent server, transmitting a record of the corresponding index address through a script to the intermediary terminals registered in the intermediary pool, collecting responses, and delivering the responses to the agent server to correspond to the corresponding index address; The agent server includes a first database for storing the data of the standard intent and legality example, including the precedent for the setting item of the record, and the data of the first database and / or the moderator pool. It is characterized by presenting the answer through the server as a reference to the user terminal.

In addition, the agent server further comprises a second database for updating and storing the frequency of use data of the item to query the mediator pool of each record item of the hash table, and present the frequency of use of the second database as a reference to the user terminal This is desirable.

On the other hand, the blockchain-based smart contract method according to the present invention for achieving the above object, provided with the blockchain-based smart contract system, (A) grants a new index address in response to a request of the first user terminal Providing a hash table including the set reference and a script; (B) broadcasting a contract created between the first user terminal and the second user terminal to the blockchain in a hash table shared through the corresponding index address, wherein the contract comprises: (a) each record of the hash table; Referencing a reference through a script; (b) forming metadata including a corresponding index address and a hash of each account of the first user terminal and the second user terminal in the created hash table through information of a script according to the agreement between the first user terminal and the second user terminal; And (b) agreeing on the record of the record, including a script for the record containing the request for opinion including the opinion or scope of each person according to whether the interest of the record is legal or not. Requesting arbitration including one or more consecutive opportunities through; (Ii) encrypting the user in response to the arbitration request of step (iii) and transmitting the record or records that are the subject of the arbitration request to the moderator pool server; (Iii) sending the record to registered moderators and obtaining answers from the moderators; And (iii) transmitting the obtained answers to the agent server so that the corresponding records can be expressed as a reference.

In addition, in the step (iii), the moderator full server may include (i-1) asking whether or not the moderators agree on the responses of the moderators; (Iii-2) attaching whether the arbitrators agree to the answers together with the obtained responses of the arbitrators, and transmitting them separately to the agent server.

In the step (B), it is preferable to broadcast the data to the blockchain by forming metadata including the responses of the arbitrators and the agreement on the agreement made between the first user terminal and the second user terminal.

According to the present invention, the information of the parties to the contract is not exposed, thus providing an example of irrational cases including the purpose and precedent of the contract item, and the objective opinions are reflected to arbitrators composed of expert groups to secure complementary and transparency, and blockchain characteristics Based on the above, the risk of alteration can be prevented, and the comparative example or the mediator's opinion can be reflected on the conflicting interests of the contractual parties, thereby increasing the contracting rate and reflecting the mediator's opinion as well as the contract concluded. By making it possible to increase the awareness among the parties to the contract, distributed storage in the blockchain can be used as proof that there is no forgery.

1 is a block diagram of a blockchain-based smart contract system according to the present invention,
2 is a flowchart showing a smart contract method based on blockchain according to the present invention;
3 is a flow chart of a request for arbitration of the contracting parties of FIG.

The terms or words used in the specification and claims of the present invention are not to be construed as being limited to the ordinary or dictionary meanings, but the inventors may properly interpret the concept of terms in order to explain their own invention in the best way. It can be defined as 'definable' and should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

In addition, the configuration shown in the embodiments and drawings described in the specification of the present invention is only a preferred embodiment of the present invention, and does not represent all of the technical idea of the present invention, these are not applied at the time of filing of the present invention. It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but may belong to the claims of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention generally utilizes a P2P blockchain and hash table to enable security and authorization of access to computer software.

The embodiments described below may specifically refer to transactions occurring on the blockchain, but it should be understood that the present invention may be implemented using other P2P distributed ledgers.

In this regard, a hash table (HT) can be replaced with a transaction sheet, the use of which is shared between participating nodes. In this way, if the capacity of all participating nodes is utilized, most of the resources are not damaged by the failure of one server.

1 is a block diagram of a blockchain-based smart contract system according to a preferred embodiment of the present invention, wherein users receive a unique account from a blockchain platform and an agent server 100 using their respective terminals 200. .

As such, each account contains a common username, password, and personal information, each of which is merged with a hash table of a contract form, which is then created via a hash function, thereby distributing only the individual accounts in the party relationship. You will be able to see the agreements distributed on the site.

In addition, individual accounts are not exposed to intermediaries during the conclusion of a contract.

Here, the procedure of the first user terminal and the second user terminal of the user terminal is referred to as the first user terminal for the user terminal that requested the hash table of the contract form in consideration of the same position in the conclusion of the smart contract, the first user The hash table having the index address requested by the terminal is classified into a second user terminal, a third user terminal, and the like according to a subsequent order of receiving and sharing the index address by the first user. Only the second user terminal will be described.

In addition, the user terminals may access the agent server 100, install a dedicated program, receive various contract forms from the database 110 included in the agent server 100, or download them as necessary.

In addition, user terminals access each blockchain, which is a distributed network, through their own accounts, and act as respective nodes.

Accordingly, when the first user terminal 200 accesses the agent server 100 as a platform through a network with a unique account, the agent server 100 presents various forms to the first user terminal 200. The unique index address including the account of the first user terminal 200 is assigned to the selection.

Subsequently, the first user terminal transmits the given index address to the second user terminal 200, and the second user terminal accesses the agent server 100 and inputs the corresponding index address to the first user terminal and the second user. The terminals share a hash table for one contract with each other.

In this process, each user terminal may download or output a contract form of a shared hash table, and the agent server 100 may classify each information input through each account (for example, through the first user terminal). The input information is displayed in blue, and the information input through the second user terminal is displayed in green.

The agent server 100 provides a reference and a script for each record corresponding to each item of the presented hash table, and merges the information input through the first user terminal and the second user terminal in agreement with each other. In order to determine the agreement between each item and the final contract based on the agreement between the two choices through the proposed script.

Here, the hash table of the contract form to which the index address is given may be given by paying a coin through a user terminal, and the coin used here uses a cryptocurrency including Ethereum. Cryptocurrency can also use closed currency (coins or tokens that are used exclusively for contracts without price changes of cryptocurrencies) that are exchanged at the same rate as the current currency.

In addition, the use of a reference can be made by paying the coin as an additional item, and the use of a script of the arbitration request can also be made by paying a coin, and the payment for these arbitration requests is the number of arbitrators and an additional consent. It can also be classified and applied and distributed separately.

In addition, the user account may include user information (name, account, seal, autograph, social security number, corporate registration number, address, etc.) input when the agent server 100 is registered, and the index address includes these information. The account can be made up of a completed form via a hash function.

On the other hand, as described above, the reference provided by the agent server 100 for each item is to present a description of the illegal elements of the contract, legal examples and case information in a plurality of frames, through which agreement between the parties is derived. It is to suggest a preferred way to.

In addition, among the scripts provided by the agent server 100 for each item, the number of records of each record divided into items for a group registered by experts registered in correspondence with each form relating to the conclusion of a contract such as a lawyer or a license. It can consist of a table that allows you to set a limit number.

Other types of scripts may include icons that indicate consensus, icons that do not agree, icons that require presentation of references, such as precedent.

In addition, each of the user terminal is a smart contract program, when the contract is concluded to pay the other party, it is preferable to automatically charge the tax to inform the contractor of the tax paid or the tax imposed. This prevents tax evasion and ensures that the contractor knows what taxes to pay when paying.

The contract transaction between the user terminal as each node is to directly approve the smart contract condition and pay the amount corresponding to the contract condition, and a detailed description thereof will be omitted.

In addition, each user terminal using the smart contract program, if the other contractor does not approve within a certain time after the contract condition is satisfied, requests the approval to the agent server 100, the blockchain platform, the agent server 100 To increase the reliability of blockchain-based smart contracts by degrading the counterparty's credit, sharing or deporting the information of the other contractor if the contractor does not approve the contract that satisfies the contract conditions without any special reason. This is preferred.

FIG. 2 is a flowchart illustrating a blockchain-based smart contract method according to the present invention.As a step (A), the agent server 100 selects a contract selected from various contract forms by a first user terminal connected to a unique account through a dedicated program. In response to the form request, an index address is given, and a contract form of a hash table loaded with a reference and a script corresponding thereto is provided (ST100).

At this time, the user of the first user terminal delivers the index address of the hash table of the contract form to the second user terminal that is the other contractor to the target party of the contract, and the second user terminal inputs the corresponding index address as the second contracting party. The hash table is published (ST110).

The contracting parties of the first user terminal and the second user terminal enter the contract details in the records, checking the reference corresponding to each item presented for the record of each bucket defined in the hash table as step (a). Compare and try to coordinate with each other (ST120).

In this process, the contracting parties can exchange opinions about whether to be arbitrated by the arbitrators if no agreement is reached between them, and when the agreement is not reached even after the set time, the agent server 100 requests the mediator. To present a pop-up window to guide or induce consensus (ST130, ST140).

If there is no hope of arbitration by the arbitrators, the parties may wish to seek advice from the arbitrators on the matters concluded, even if they have decided to agree (ST142).

In step (B) and (b), the agent server 100 checks whether or not the contract amount is paid for the mutual agreement and receives a completion request. The addresses are combined to form metadata and broadcasted to the blockchain (ST150, ST160).

In the above process, when the contracting parties wish to request the advice of the arbitrators, as shown in Fig. 3, the contracting parties designate the record of the item which is not agreed as the step (i), and in addition to the description of the record Request mediation, including one or more consecutive occasions, through a script on records containing comments or comments, including the opinion or scope of interests based on the legality of interests or differences (ST131).

In response to this, the agent server 100 encrypts the information of the contracting parties in the arbitrator terminals restricted by the contracting parties as steps (ii) and (iii), and transmits the record or records and the inputted comment which are the subjects of the arbitration request. It transmits to 300 so that the intermediary terminals can confirm, and obtains the answers of the result (ST132) (ST133).

The answers obtained as step (iii) are transmitted to the agent server 100 so that the corresponding records can be expressed by reference.

In addition, (iii-1), a step of asking whether or not the moderators agree on the responses of the moderators; (Iii-2) In addition to the responses of the obtained mediators, the process may further include a step of separately attaching whether the mediators agree on the responses and transmitting the information to the agent server.

In addition, in the above process, the arbitrator's inspection can be enforced, which is to prevent the result of the contract being destroyed by an unreasonable contract and to further increase the reliability of the contract.

100: agent server 200: user terminal
300: Moderator full server 400: Moderator terminal

Claims (5)

An agent server that stores a hash table of contract form with references and scripts corresponding to each index address and individual bucket characteristics, provides them in response to requests, and broadcasts them by including a user identification key in the determined hash table; ;
An intermediary pool server interworking with the agent server, transmitting a record of the corresponding index address through a script to the intermediary terminals registered in the intermediary pool, collecting responses, and delivering the responses to the agent server to correspond to the corresponding index address; It is made, including
The agent server has a first database for storing the data of the standard purpose and legality example, including the precedent for the setting item of the record, and the user receives the data of the first database and / or the answer through the moderator pool server. Blockchain-based smart contract system, characterized in that presented to the terminal as a reference. The method of claim 1,
The agent server further includes a second database for updating and storing the frequency data of use of the query item of the record table of the hash table, and presenting the frequency data of the second database as a reference to the user terminal. Blockchain-based smart contract system characterized by. Equipped with a blockchain-based smart contract system of claim 1,
(A) providing a newly created index address in response to a request of the first user terminal, and providing a hash table including the set reference and a script;
(B) broadcasting a contract created between the first user terminal and the second user terminal to the blockchain in a hash table shared through the corresponding index address;
The contract includes (a) referencing a scripted reference to each record in the hash table; (b) forming metadata including a corresponding index address and a hash of each account of the first user terminal and the second user terminal in the created hash table through information of a script according to the agreement between the first user terminal and the second user terminal; Consisting of;
The agreement in the step (b) shall include (i) one or more consecutive opportunities through the script for records containing requests for opinions including the opinions or scope of each person's opinions or opinions regarding the legality of the interests of the records. Requesting arbitration, including; (Ii) encrypting the user in response to the arbitration request of step (iii) and transmitting the record or records that are the subject of the arbitration request to the moderator pool server; (Iii) sending the record to registered moderators and obtaining answers from the moderators; And (iii) transmitting the obtained answers to the agent server so that the corresponding records can be expressed as a reference. The method of claim 3,
In the step (iii), the moderator full server includes: (iii-1) asking whether or not the moderators agree on the responses of the moderators; (Iii-2) separately transmitting the obtained responses of the arbitrators and whether the mediators agree on the responses, and transmitting them separately to the agent server. The method of claim 3,
Blockchain-based smart contract method, characterized in that the metadata formed by the mediator including the answer and the agreement of the moderators to the contract created between the first user terminal and the second user terminal in step (B) .

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