KR20200021194A - Smart contract method and system based block chain - Google Patents

Abstract

The present invention relates to a blockchain based smart contract method and a system thereof. According to an embodiment of the present invention, even a user, who does not have an account on a specific blockchain platform (e.g., an EOS blockchain), can generate a transaction without excessive burden of account creation costs. The blockchain based smart contract method comprises the steps of: generating contract block information and account access key information; sharing the account access key information; generating transaction information for the contract block information and transmitting the same to a network server; and determining whether the transaction information is valid and updating the contract block information.

Description

Smart contract method and system based on blockchain {SMART CONTRACT METHOD AND SYSTEM BASED BLOCK CHAIN}

The present invention relates to a blockchain based smart contract method and system.

Blockchain is a technology for recording data based on cloud technology and P2P technology, and everyone is the subject of data storage and management and records the same information.

Here, the "block" of the block chain means a data storage unit, which is different from the meaning that "block" of the file system is the minimum space in which one file can be allocated on the disk.

The blockchain technology does not store data in file units based on the file system, but stores data in block units in a DB of the blockchain according to a distributed database environment.

Blockchain technology provides security by allowing data access only if the access right to the block, which is the storage unit of data, is granted.

Blockchain technology provides backups by synchronizing the writing of blocks in which the same data is stored between nodes that are the storage subjects of the block.

In addition, blockchain technology can be applied to general-purpose computer equipment, providing cost-saving deployment without expensive hardware and software equipment.

EOS.IO, meanwhile, is an open source software launched in 2016 at Block.one and is one of the blockchain architectures such as Microsoft's Bretzley or IBM's Hyperledger Fabric.

The EOS Blockchain adopts the Delegated Proof Of Stake (DPOS) method, which enables transaction processing at a much faster rate than Ethereum.

The biggest advantage is that with fast transaction processing, users pay OS without paying fees.

In contrast, Ethereum-based dapps require the developer to pay for Ethereum without the operator paying the operating fee.

On the other hand, IOS must first secure resources through 'stake' called 'stake', and without support, it is impossible to transfer or stake.

Since resources belong to the account, the user must first secure the account and the resource for the action.

The problem is that people who don't have an account must create one, but creating one also requires another account as an act.

That is, a general user without any account has a problem that accessibility is very poor.

Korean Patent Publication No. 10-2018-0085570 (published Jul. 27, 2018) 'A device and method for managing data using a blockchain' Korea Patent Publication No. 10-2018-0014534 (published Feb. 9, 2018) 'Blockchain-based Transaction Verification System and Method'

Accordingly, the present invention has been made in view of the above-mentioned background, and a blockchain-based smart contract method and system for generating a transaction without excessive burden of account creation cost even for a user without an account on a specific blockchain platform (OS blockchain) The purpose is to provide.

The object of the present invention is not limited thereto, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, an embodiment of the present invention provides a first user terminal 201 having account name information and credential key information to access the network server 205 to generate contract block information and account access key information. Step (S1); Sharing, by the first user terminal 201, the account access key information with a second user terminal 203 having user name information and user key information (S2); The second user terminal 203 generates transaction information for the contract block information using the account access key information, the user name information, and the user key information, and transmits the transaction information to the network server 205. Step S3; And determining, by the network server 205, the validity of the transaction information, and updating the contract block information (S4).

A first user terminal 201 having account name information and credential key information and connected to a network server 205 to generate contract block information and account access key information; A second user terminal (203) having user name information and user key information and receiving the account access key information from the first user terminal (201); And the network server 205 receiving the transaction line information for the contract block information from the second user terminal 203, determining the validity of the transaction information, and updating the contract block information. A blockchain based smart contract system is provided.

According to one embodiment of the present invention, even a user without an account in a specific blockchain platform (for example, an EOS blockchain) has an effect of generating a transaction without excessive burden of account creation cost.

1 is a flowchart illustrating a blockchain based smart contract method according to an embodiment of the present invention.
2 is a block diagram illustrating a blockchain based smart contract system according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components as much as possible, even if displayed on different drawings. In addition, in describing the present invention, if it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

First, the smart contract will be described. A smart contract is a program code that can execute and execute a contract or negotiation using blockchain technology.

Thus, the entire process can be automated by the program code to complement or replace the legal contract.

The existing cryptocurrency storage function of blockchain 1.0 can be programmed in various forms.

Ethereum is a blockchain system that can execute smart contracts and can provide a global platform through EVM (Ethereum Virtual Machine).

Developers can run smart contracts through programming and manage digital assets such as cryptocurrencies.

Here, Ethereum was developed to use a platform for recording various information such as SNS, e-mail, and electronic voting in order to overcome the difficulty of negotiation due to the massiveness of the Bitcoin network.

Ethereum can provide account management, currency generation and mining, and can use distributed applications (Dapp) to run applications on smart contracts and EVMs.

Nick Szabo, the first creator of smart contracts, defined smart contracts as a highly developed method of automating contracts between machines in unreliable computer networking environments. The platform has been extended for development.

Currently, the most notable technology in Blockchain 2.0 is smart contracts.

Smart contracts were also possible in Bitcoin, but only if conditions could be used, so there were limitations in creating the desired contract.

On the other hand, Ethereum, also known as smart contracts, can provide Turing completeness, so that it can support programming to a computer, allowing programming of various forms of transactions or contracts.

Existing contracts have legal language in the documents printed by legal experts and have a high dependency on third parties.

In addition, traditional contracts are time consuming and costly and time consuming because they must rely on the judicial system in case of disputes.

However, blockchain smart contracts can be defined in the same way that computer programmers write in digital language to define rules and results in the same way that they specify the obligations, benefits, and penalties of the contracting parties in existing traditional contracts. This has the advantage that the contract can be enforced by the system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a flowchart illustrating a blockchain based smart contract method according to an embodiment of the present invention.

2 is a block diagram illustrating a blockchain based smart contract system according to another embodiment of the present invention.

As shown in these figures, in the blockchain-based smart contract method according to an embodiment of the present invention, a first user terminal 201 having account name information and credential key information is connected to the network server 205. To generate contract block information and account access key information (S1); Sharing, by the first user terminal 201, the account access key information with a second user terminal 203 having user name information and user key information (S2); The second user terminal 203 generates transaction information for the contract block information using the account access key information, the user name information, and the user key information, and transmits the transaction information to the network server 205. Step S3; And determining, by the network server 205, the validity of the transaction information, and updating the contract block information (S4).

In step S1, the first user terminal 201 having account name information and credential key information is connected to the network server 205 to generate contract block information and account access key information.

Here, the credential key information includes an owner key and an active key.

The contract block information is a kind of contract information, and the account access key information is the signature information of the account.

In addition, the account access key information can be selectively accessed by using the multi-sign (Multi Signature) (for example, the account name information, the credential key information can not be modified, only the account name information can be read or used). Information about a key generated to

In step S2, the first user terminal 201 shares the account access key information with the second user terminal 203 having the user name information and the user key information.

Here, the user key information of the second user terminal 203 may include private key information and public key information.

In step S3, the second user terminal 203 generates transaction information for the contract block information using the account access key information, the user name information, and the user key information, and transmits the transaction information to the network server 205. .

That is, since the second user terminal 203 has account access key information accessible to the account of the first user terminal 201, the second user terminal 203 has access to the contract block information generated by the account of the first user terminal 201. Transaction information can be generated through user name information and user key information.

In step S4, the network server 205 determines the validity of the transaction information and updates the contract block information.

Through this step, even if the second user terminal 203 does not have an account of a specific blockchain platform (for example, an EOS blockchain), a signing of the account held by the first user terminal 201 is possible. Information can be generated.

In addition, since the sign (user name information and user key information) of the second user terminal 203 is confirmed in the contract, individual users can be distinguished.

On the other hand, the blockchain-based smart contract system according to another embodiment of the present invention, having a first name terminal, having the account name information, the credentials key information, connected to the network server, generating the contract block information and account access key information; A second user terminal having user name information and user key information and receiving the account access key information from the first user terminal; And the network server receiving the transaction line information on the contract block information from the second user terminal, determining the validity of the transaction information, and updating the contract block information.

In the blockchain-based smart contract system according to another embodiment of the present invention, the functions of the first user terminal 201, the second user terminal 203, and the network server 205 may be referred to the above description, and thus, a detailed description thereof will be provided. Omit.

As described above, according to the embodiment of the present invention, even a user without an account on a specific blockchain platform (for example, an EOS blockchain) has an effect of generating a transaction without excessive burden of account creation cost.

In the above description, it is described that all the components constituting the embodiments of the present invention are combined or operated in one, but the present invention is not necessarily limited to these embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more.

In addition, the terms "comprise", "comprise", or "having" described above mean that the corresponding component may be included unless otherwise stated, and thus, other components are excluded. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

201: First user terminal
203: second user terminal
205 network server

Claims (2)

A first user terminal 201 having account name information and credential key information connected to the network server 205 to generate contract block information and account access key information (S1);
Sharing, by the first user terminal 201, the account access key information with a second user terminal 203 having user name information and user key information (S2);
The second user terminal 203 generates transaction information for the contract block information using the account access key information, the user name information, and the user key information, and transmits the generated transaction information to the network server 205. Step S3; And
Determining, by the network server (205), the validity of the transaction information, and updating the contract block information (S4);
Blockchain based smart contract method comprising a. A first user terminal 201 having account name information and credential key information and connected to a network server 205 to generate contract block information and account access key information;
A second user terminal 203 having user name information and user key information and receiving the account access key information from the first user terminal 201; And
The network server (205) receiving the transaction line information on the contract block information from the second user terminal (203), determining the validity of the transaction information, and updating the contract block information;
Blockchain based smart contract system comprising a.

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