KR102155571B1 - Smart transaction system using proptech blockchain and operating method thereof - Google Patents

Abstract

The smart transaction system using the Proptech Blockchain of the present invention creates a Proptech Blockchain distributed and stored in authorized nodes as a Private Blockchain, a block to be connected to the Proptech Blockchain, and creates a requested transaction. Blockchain management server that records in the block, and an enforcement terminal that provides a first transaction to the blockchain management server to record information related to the construction project in the Proptech blockchain, and the first transaction recorded An investor terminal that decides whether to invest using a block of the Proptech blockchain and provides the investment money to the blockchain management server according to the investment decision, and records information related to the construction according to the construction project in the Proptech blockchain. In order to do so, it includes a construction company terminal that provides a second transaction to the blockchain management server, and the blockchain management server sends a project coin in an amount corresponding to the investment amount to the investor terminal when the investment money is provided from the investor terminal. Payment, and the investor terminal automatically closes the smart contract by providing the project coin and the first authentication key to the developer terminal.

Description

Smart transaction system using proptech blockchain and its operation method {SMART TRANSACTION SYSTEM USING PROPTECH BLOCKCHAIN AND OPERATING METHOD THEREOF}

Regarding a smart transaction system and its operation method using a proptech block chain according to an embodiment of the present invention, mutual trust by recording information related to a construction project in the proptech block chain and allowing contractors to share the information It relates to a smart transaction system and a method of operating the same for building.

Blockchain is a structure designed for the first time in Bitcoin to ensure the reliability of P2P transactions between individuals without intermediary. Bitcoin maintains the reliability of the blockchain network by collecting new transactions awaiting approval into blocks, receiving approval through a mining process called proof of work, and creating a chain by attaching previously approved blocks. However, while the structure called public blockchain gives the openness that anyone has the authority to approve if they pass the proof of work, there is a lack of scalability due to the limitation of transaction processing capacity and the format of data written in the ledger is limited, proof of work (mining). Big problems arise, such as incurring huge costs in the process.

Accordingly, in the process of applying the blockchain technology that first appeared in Bitcoin to various fields such as finance, medical care, trade, and public administration, a modified form of blockchain called a private blockchain became the main focus. The private blockchain is a system that grants approval of transactions only to those who act as validators, such as the operating entity of the network, and places restrictions on the qualifications to participate in the network. Therefore, the private blockchain does not require the mining process through proof of work and can achieve faster transaction speed.

On the other hand, a pre-sale contract is a contract established by a pre-sale contractor agreeing to transfer the ownership of a building, etc. to a few pre-sale houses, and a contract by the sub-seller to pay the price. Sales contracts for apartments, etc. can be classified into'sale contracts after completion', which are sold after the apartments are completed, and'sale contracts before completion,' which are sold before apartments are completed. In general, when a pre-sale contract is made before completion, many pre-sale apartments frequently suffer damage due to non-fulfillment of the contract during the construction period that requires a long period after the pre-sale contract.

Korean Patent Publication 10-2018-0074655 (published on July 3, 2018)

The present invention was conceived to solve the above-described problems, and protects investors with relatively weak information power, and a real estate transaction system using a proptech blockchain to ensure transparent and safe real estate investment and transactions to contractors and objections. It aims to provide an operating method.

A smart transaction system using a proptech block chain according to an embodiment of the present invention creates a proptech block chain distributed and stored in nodes authorized as a private block chain, and a block to be connected to the proptech block chain, Blockchain management server that records the requested transaction in the generated block, and an enforcer terminal that provides a first transaction to the blockchain management server to record information related to the construction project in the proptech blockchain, and the first An investor terminal that determines whether to invest using the block of the Proptech blockchain in which transactions are recorded, and provides investment money to the blockchain management server according to the investment decision, and information related to construction according to the construction project, is transmitted to the prop. A construction company terminal that provides a second transaction to the block chain management server for recording on the tech blockchain, and the block chain management server includes a project coin of an amount corresponding to the investment amount when the investment money is provided from the investor terminal. Is paid to the investor terminal, and the investor terminal provides the project coin and the first authentication key to the developer terminal to automatically conclude a smart contract for the construction project.

According to an embodiment, the block chain management server may allow viewing of the proptech block chain to an investor terminal, a developer terminal, and a construction company terminal that meet a preset criterion.

According to an embodiment, the block chain management server may recognize only the first and second transactions provided from the developer terminal and the construction company terminal that meet the criteria as valid and record them in the block.

According to an embodiment, the first transaction may include information on at least one of capital information of a developer, a location of a building completion, a completion period, a list of expected contractors, and an investment amount.

Depending on the embodiment, the second transaction may include information on at least one of a construction company's capital information, material details, procurement details, process drawings, completion drawings, and costs related to construction materials.

According to an embodiment, the project coin may be valid only until the construction project is terminated.

According to an embodiment, the developer terminal may receive an investment corresponding to a project coin from the blockchain management server using the first authentication key.

According to an embodiment, the developer terminal selects a contractor using a block of the proptech block chain in which the second transaction is recorded, and provides a second authentication key and a part of the project coin to the selected contractor's contractor terminal. Thus, the second smart contract can be concluded.

According to an embodiment, the construction company terminal may receive an investment corresponding to a part of the project coin from the block chain management server using the second authentication key.

Depending on the embodiment, if the developer terminal does not provide information related to the progress of the construction project to the blockchain management server as the first transaction at every preset cycle, the validity of the project coin provided from the investor terminal is lost. Can be.

According to an embodiment, when the construction company terminal does not provide information related to the progress of the construction project to the blockchain management server as the second transaction at every preset cycle, the validity of a part of the project coin provided from the developer terminal This can be lost.

In addition, a smart device including a blockchain management server that manages transactions between an investor terminal, a developer terminal, and a construction company terminal using a proptech block chain distributed and stored in nodes authorized according to another embodiment of the present invention. The operating method of the transaction system includes the steps of providing a first transaction to the blockchain management server in order to record information related to the construction project in the proptech blockchain by the developer terminal, and the blockchain management server Creating a block of the block chain, recording the first transaction in the generated block, and providing an investment to the block chain management server by determining an investment by the investor terminal based on the block of the proptech block chain. And receiving, by the investor terminal, a project coin corresponding to the investment amount from the block chain management server, and the investor terminal providing the project coin and a first authentication key to the developer terminal to provide the construction project Including the step of closing a smart contract for.

According to an embodiment, the method of operating the smart transaction system may further include receiving, by the execution company terminal, an investment corresponding to a project coin from the blockchain management server using the first authentication key.

According to an embodiment, the method of operating the smart transaction system includes the steps of providing, by the construction company terminal, a second transaction to the blockchain management server to record construction-related information according to the construction project in the proptech blockchain, and , The block chain management server may further comprise the step of creating a block of the Proptech blockchain and recording the second transaction in the generated block.

According to an embodiment, in the operating method of the smart transaction system, the developer terminal selects a contractor using a block of the proptech blockchain in which the second transaction is recorded, and a second authentication key is provided to the selected contractor's contractor terminal. And providing a part of the project coin to establish a second smart contract.

According to an embodiment, the method of operating the smart transaction system may further include receiving, by the construction company terminal, an investment corresponding to a part of the project coin from the block chain management server using the second authentication key. .

According to the real estate transaction system using the Proptech blockchain according to an embodiment of the present invention, investors can efficiently review whether to invest in a project using information contained in the Proptech blockchain, which is difficult to forge and alter. Rather, it is possible to sign a secure smart contract with the developer by using the project coin issued by the blockchain management server.

In addition, according to the real estate transaction system using the Proptech Blockchain according to the embodiment of the present invention, since the developer and the constructor must periodically record the project progress in the Proptech Blockchain, the investor can monitor the progress of the project and In this way, the project can be carried out transparently and fairly.

1 is a conceptual diagram illustrating a smart transaction system using a proptech block chain according to an embodiment of the present invention.
2 is a view for explaining a proptech block chain controlled by a block chain management server according to an embodiment of the present invention.
3 is a flowchart illustrating a smart transaction method using a proptech block chain according to an embodiment of the present invention.
4 is a flowchart illustrating a smart transaction method using a proptech block chain according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments described below are only for explaining in detail enough that a person having ordinary knowledge in the technical field of the present invention can easily carry out the invention, and this limits the protection scope of the present invention. Does not mean. In addition, in describing various embodiments of the present invention, the same reference numerals will be used for components having the same technical characteristics.

1 is a conceptual diagram illustrating a smart transaction system using a proptech block chain according to an embodiment of the present invention. The smart transaction system 10 using a proptech block chain according to an embodiment of the present invention includes a block chain management server 100, an investor terminal 200, a developer terminal 300, and a construction company terminal 400.

The blockchain management server 100 refers to a blockchain management center that creates a new block of the Proptech Blockchain (BC), records data in the new block, and grants authority to nodes (ND).

Proptech Blockchain (BC) operated by the blockchain management server 100 is a private blockchain, does not require a separate mining process through proof of work, and may contain information on real estate. . Therefore, the blockchain management server 100 can process transaction requests at a very high speed compared to the public blockchain method.

The blockchain management server 100 can allow access to the Proptech Blockchain (BC) only to users who have a specific interest or meet the requirements, and store only the transactions provided by them in the Proptech Blockchain (BC). I can. Accordingly, the blockchain management server 100 may block a transaction requested from a user who does not meet the requirements from being recorded in the Proptech blockchain (BC).

In addition, the blockchain management server 100 can control so that only the nodes ND that have been granted access rights can access the Proptech blockchain BC by granting access rights to each of the nodes. Here, each of the nodes (ND) is a data owner that shares the Proptech Blockchain (BC) created by the Blockchain Management Server 100, and can be updated and stored whenever a new block is created by the Blockchain Management Server. have.

Proptech Blockchain (BC) does not need to be stored in a separate database, and can be individually distributed and stored in each of the nodes recognized by the Blockchain Management Server 100. Therefore, the Proptech Blockchain (BC) can be safely protected from attacks such as forgery and alteration from external malicious attackers.

On the other hand, smart contract is a technology that allows you to easily and conveniently sign and modify contracts through P2P (peer to peer) without an intermediary. This technology has a form of automated contract processing that can secure trust through a shared network between stakeholders in various types of contracts such as financial transactions and notarization by using the characteristic of the distributed ledger technology of the blockchain.

Blockchain management server 100 of the present invention may issue a project coin to smoothly execute a smart contract between the developer, the investor, and the construction company. Here, the project coin refers to a coin issued for a specific purpose to perform a project set by the developer. Project Coins cannot be transferred separately to external users who are not related to the project or are not authorized to do so, and can only be used to handle expenses related to the project.

Depending on the embodiment, the validity of the project coin may be recognized only after issuance from the block chain management server 100 until the project is terminated.

Therefore, the developer, the investor, and the contractor can use the project coin to enter into a reliable contract for architectural projects, such as apartment sales projects and commercial building sales projects, without going through a separate agency.

On the other hand, the investor may be provided with information on the project of the developer in order to determine the investment using the investor terminal 200.

Here, the investor refers to the entity that provides funds to the implementing company, and may refer to a public investment institution, a private investment institution, an individual investment, a few buyers, etc. For example, an investor may be a financial institution that provides project financing (PF) loans to a developer. Investors may decide whether to lend a PF to the developer by considering essential information related to the developer, such as quarterly performance, debt, and project business plan of the developer.

In addition, the investor may be a number of buyers to occupy a building built by the developer. The number of buyers may have to provide a down payment, intermediate payment, balance, etc. to the developer in order to move in.

When the investor terminal 200 accesses the blockchain management server 100 and receives authentication, information on the apartment construction project of the developer may be received through the proptech block chain (BC). The Proptech Blockchain (BC) can include information on the capital of the developer, the location of the building completion, the completion period, a list of expected contractors, and the amount of investment, and the investor can analyze this information to decide whether to invest in the project.

When the investor decides to invest in the project of the developer, the investor does not provide the investment directly to the developer, but deposits the investment money to the blockchain management server 100 and transfers the amount of project coins corresponding to the investment to the investor terminal 200. It can be paid through. In addition, the investor terminal 200 may provide an authentication key together with the project coin to the developer.

For example, several buyers can receive project coins by depositing cash corresponding to the down payment, intermediate payment, and balance to the blockchain management server 100 in order to provide a down payment, intermediate payment, and balance to the developer for the purpose of selling an apartment. Project coins can be provided to the developer along with an authentication key so that the developer can use the project coin.

Depending on the embodiment, the investor pays the down payment, the intermediate payment, and the balance to the block chain management server 100 to the block chain management server 100 in response to the time when the project is progressing, and from the block chain management server 100 You can receive project coins. In other words, the investor can secure safety by not providing all the investment amount to the developer at once, but by dividing the amount by sale period and providing it to the developer.

In order to select a reliable contractor, the developer may receive information about the contractor through the developer terminal 300. The developer terminal 300 can store these details in the Proptech Blockchain (BC) in order to transparently disclose the construction company's capital information, material details, procurement details, process drawings, completion drawings, costs related to construction materials, etc. The developer can select a contractor suitable for the project by analyzing the information of the contractor included in the Proptech Blockchain (BC).

Depending on the embodiment, the developer terminal 300 may be requested to input information related to the progress of the project to the proptech blockchain (BC) at every preset cycle.

For example, the implementation company terminal 300 may be requested to record matters related to the construction company selection cost, process chart, completion rate, etc. in the proptech block chain (BC) every one week. If, if the enforcement terminal 300 violates such a contract, the validity of the project coin provided from the investor terminal 200 is lost, and currency exchange is impossible.

In addition, the contractor terminal 400 may not receive money directly from the contractor to construct the building, but may receive only the amount of project coins required for construction from the developer along with the authentication key. The contractor terminal 400 can exchange project coins for money in the blockchain management server 100 using the authentication key, and can proceed with the project using the converted money.

Depending on the embodiment, the contractor terminal 400 may be requested to input information related to completion in the proptech blockchain (BC) every preset period.

For example, the construction company terminal 400 may be requested to record matters related to material details, procurement details, process drawings, completion drawings, costs related to construction materials, etc. in the Proptech Blockchain (BC) every one week. If the contractor violates such a contract, the project coin provided by the developer loses its validity and cannot be exchanged in the blockchain management server 100.

When the contractor completes the construction of the building, the contractor submits a completion notice to the government office to proceed with the inspection procedure. Upon receiving completion approval from the government office, the developer may provide the completion approval-related contents to the blockchain management server 100 through the developer terminal 300 in order to store the completion approval document in the proptech block chain (BC). The blockchain management server 100 may record the completion approval-related contents in the proptech blockchain (BC) according to the transaction sequence.

Accordingly, the investor can read the completion approval-related contents stored in the Proptech blockchain (BC) through the investor terminal 200, and based on the read information, the investor can recover the investment or initiate the work before the registration of the building. have.

In other words, when the approval of completion is decided by the government office, the investor can withdraw the investment from the developer or apply for the transfer registration by transferring the storage registration of the developer.

As described above, according to the smart transaction system using the Proptech Blockchain (BC) according to the embodiment of the present invention, the investor will decide whether to invest in the project by using the information contained in the Proptech Blockchain (BC), which is difficult to forge and alter. In addition to being able to efficiently review whether or not, it is possible to conclude a secure smart contract with the developer using the project coin issued by the blockchain management server 100.

When data is recorded in blocks of the Proptech Blockchain (BC), which is a distributed public ledger, it cannot be forged or altered. Therefore, since the information written in the data block during the project process cannot be arbitrarily manipulated by the contractor or the developer during the subsequent project period, investors can use the information contained in the Proptech Blockchain (BC) to Can be determined clearly.

In addition, since the developer and the contractor must periodically record the project progress on the Proptech Blockchain (BC) to maintain the validity of the project coin, investors can efficiently monitor the project progress, thereby making the project transparent and This can be done fairly, and the process of recovering investment and transferring ownership can also be carried out safely.

In addition, the investor terminal 200, the developer terminal 300, and the construction company terminal 400 shown in FIG. 1 are a personal computer (PC), a smart phone, a tablet PC, and a mobile Internet device. internet device (MID)), internet tablet, internet of things (IoT) device, internet of everything (IoE) device, desktop computer, laptop computer, workstation computer, wireless broadband internet (Wibro) It may be any one of a terminal and a personal digital assistant (PDA), but is not limited thereto, and may refer to any type of electronic device capable of transmitting and receiving data with a blockchain management server.

2 is a view for explaining a proptech block chain controlled by a block chain management server according to an embodiment of the present invention.

Referring to FIG. 2, each block BL of the Proptech Blockchain BC is a block hash serving as an identifier of the block, a block header including the block hash of the previous block, and data. It may include a transaction for storage.

Each of the blocks BL is generated by the block chain management server 100 and may be connected to each other using a block header. For example, if the block hash of the first block (Block #0) is 0x000035, the block header of the second block (Block #1) connected to the first block (Block #0) is a block of the first block (Block #0). The hash of 0x000035 is saved.

In addition, in the transaction of the block BL, information related to the construction project provided from the developer and the constructor may be sequentially stored according to the transaction order.

The information included in each block of the proptech block chain (BC) can be freely checked by users of the investor terminal 200, the developer terminal 300, and the construction company terminal 400. On the other hand, among the investor terminal 200, the developer terminal 300, and the contractor terminal 400, only a user who obtains authority by the blockchain management server 100 can provide a transaction to the blockchain management server 100. .

The blockchain management server 100 may receive transactions from the investor terminal 200, the developer terminal 300, and the construction company terminal 400, and may record the transaction in the block BL according to the received order.

For example, when the blockchain management server 100 receives a certain amount from the investor terminal for the purpose of investment in the project of the developer, the blockchain management server 100 receives a certain amount from the investor in relation to the project of the developer, and the above It is possible to record in the block BL that the project coin corresponding to the amount has been paid to the investor.

The developer terminal 300 may provide a transaction including the developer's capital information, the apartment completion location, completion period, a list of expected contractors, and the size of investment funds to the blockchain management server 100, and the blockchain management server 100 May generate a block BL including the information.

Depending on the embodiment, the developer terminal 300 must provide information on the construction company selection cost, process chart, completion degree, etc. to the block chain management server at regular intervals during the project, and the block chain management server 100 stores the information. A containing block BL may be generated.

The construction company terminal 400 can provide these details to the blockchain management server in order to transparently disclose the construction company's capital information, material details, procurement details, process drawings, completion drawings, and costs related to construction materials. The management server 100 may generate a block BL including the information.

Depending on the embodiment, the contractor terminal 400 must provide details on procurement details, process drawings, completion drawings, costs related to construction materials, etc., to the blockchain management server 100 at regular intervals during the project. Reference numeral 100 may generate a block BL including the information.

It is generated by the blockchain management server 100, so that the Proptech blockchain (BC) cannot be arbitrarily changed. The information contained in each block of the Proptech Blockchain (BC) cannot be arbitrarily changed or deleted, but information can be corrected and deleted by adding a new block that changes information with the previous block.

For example, the first block (Block #0) of the Proptech Blockchain (BC) contains information on the 50% completion rate provided from the construction company terminal 400, and the second block (Block #1) contains 70% completion. When information about the rate is included, the developer terminal 300 and the investor terminal 200 can confirm that the project was completed by about 70% based on the proptech blockchain (BC).

Proptech blockchain (BC) may be distributed and stored by nodes (ND) authorized by the blockchain management server 100. If there is an attacker who wants to forge and alter the information of the Proptech blockchain (BC), the attacker must simultaneously attack the Proptech blockchain (BC) stored in the nodes (ND). Even if the attacker succeeds in forging the Proptech blockchain (BC) stored in some nodes (ND), if a new block is added to the Floptech blockchain (BC) by the blockchain management server 100, the blockchain management server The attack operation loses its effectiveness by the verification operation. Thus, Proptech Blockchain (BC) can be safely protected from attackers.

In addition, since Proptech Blockchain (BC) cannot be arbitrarily changed or deleted by the implementation company and the constructor, investors with relatively insufficient information power can trust the information contained in the Proptech Blockchain (BC) and make a safe investment. You can proceed.

3 is a flowchart illustrating a smart transaction method using a proptech block chain according to an embodiment of the present invention.

3, the method of operating the smart transaction system 10 of the present invention is an investor terminal 200, a developer terminal using a proptech block chain (BC) distributed and stored in nodes (ND) that have been authorized for (300), and it is possible to manage the transaction between the construction company terminal 400.

First, the developer terminal 300 must secure investment by recruiting investors to proceed with the construction project. To this end, the developer terminal 300 may provide information related to the construction project to the proptech blockchain (BC) so that investors can view information related to the construction project. That is, the developer terminal 300 may provide the first transaction to the blockchain management server 100 in order to record information related to the construction project in the proptech blockchain (BC) (S100).

The blockchain management server 100 may generate a block of the Proptech Blockchain (BC) in response to the received first transaction, and may record a first transaction in the generated block (S110). That is, the block chain management server 100 may record information related to the construction project provided from the developer terminal 300 in a block of the proptech block chain (BC).

The investor can browse the information stored in the proptech block chain (BC) through the investor terminal 200, and can make an investment decision based on the read information. If the investor decides to provide the investment money for the construction project of the developer, the investor terminal 200 may provide the investment money to the blockchain management server 100 (S120).

The investor terminal 200 may receive a project coin in the amount corresponding to the investment from the block chain management server 100 (S130).

In addition, the investor terminal 200 may provide the project coin and the first authentication key to the developer terminal 300 to establish a smart contract (S140). In this way, the investor and the developer of the present invention can conclude a smart contract for a construction project by providing only the project coin and the authentication key without going through a separate intermediary.

In addition, investment funds for construction projects are stored in the blockchain management server 100, and the developer receives only project coins. The developer can only exchange project coins into cash for matters related to the construction project, and cannot exchange money for reasons that are not relevant. Therefore, the executor cannot abuse the investment in the items not related to the contract, and between the investor and the executor, if one of the contractors unfaithfully performs the contract performance or there is a risk of bankruptcy, the other can be safely protected.

4 is a flowchart illustrating a smart transaction method using a proptech block chain according to another embodiment of the present invention.

Referring to Figure 4, the contractor must be selected by the developer to participate in the construction project. To this end, the construction company terminal 400 may provide the construction company information to the proptech blockchain (BC) so that investors and the developer can view information related to the construction company. That is, the construction company terminal 400 may provide a second transaction to the blockchain management server 100 in order to record construction-related information in the proptech blockchain (BC) (S200).

The blockchain management server 100 may generate a block of the Proptech Blockchain (BC) in response to the received second transaction, and may record a second transaction in the generated block (S210). That is, the block chain management server 100 may record construction-related information provided from the construction company terminal 400 in a block of the proptech blockchain (BC).

The developer can view the second transaction related to the construction stored in the proptech block chain (BC) through the developer terminal 300, and select a construction company based on the read information (S220).

The developer terminal 300 may provide a part of the project coin provided from the investor terminal 200 and a second authentication key to the developer terminal 300 to conclude a smart contract (S230).

The contractor may receive an investment corresponding to a part of the project coin from the block chain management server 100 by using the second authentication key to proceed with the construction project through the contractor terminal 400 (S240).

In this way, the construction cost provided by the construction company is stored by the block chain management server 100, and the construction company receives only the amount required for construction from the block chain management server 100 using the project coin and the second authentication key. I can. Therefore, the investment money provided from the investor is converted into a project coin and provided to the construction company terminal through the developer terminal, and can be managed by the blockchain management server 100 so that costs can be paid only for items necessary for construction.

Although the embodiments of the present invention have been described above, it is understood that those of ordinary skill in the art to which the present invention pertains can perform various modifications without departing from the scope of the claims of the present invention.

100: Blockchain Management Server
200: investor terminal
300: trial terminal
400: Constructor terminal
BC: Proptech Blockchain
ND: node

Claims (16)

Proptech blockchain distributed and stored in authorized nodes as a private blockchain;
A blockchain management server that creates a block to be connected to the Proptech blockchain and records a requested transaction in the generated block;
A developer terminal providing a first transaction to the block chain management server to record information related to a construction project in the proptech block chain;
An investor terminal that determines whether to invest by using the block of the Proptech blockchain in which the first transaction is recorded, and provides investment money to the blockchain management server according to the investment decision; And
A construction company terminal providing a second transaction to the blockchain management server to record construction-related information according to the construction project in the proptech blockchain,
The blockchain management server, when the investment money is provided from the investor terminal, pays a project coin corresponding to the investment amount to the investor terminal,
The investor terminal provides the project coin and the first authentication key to the developer terminal to automatically close a smart contract for the construction project using a smart transaction system using a proptech blockchain. The method of claim 1,
The blockchain management server is a smart transaction system using a proptech block chain that allows the viewing of the proptech block chain to an investor terminal, a developer terminal, and a construction company terminal meeting a preset criterion. The method of claim 2,
The blockchain management server recognizes only the first and second transactions provided from the execution company terminal and the construction company terminal that meet the criteria as valid and records them in the block. A smart transaction system using a proptech block chain. The method of claim 1,
The first transaction is a smart transaction system using a proptech blockchain that includes information on at least one of the capital information of the developer, the location of the building completion, the completion period, the list of expected contractors, and the amount of investment. The method of claim 1,
The second transaction is a smart transaction system using a proptech blockchain including information on at least one of a construction company's capital information, material details, procurement details, process drawings, completion drawings, and costs related to construction materials. The method of claim 1,
The project coin is a smart transaction system using a proptech block chain whose validity is recognized only until the construction project is finished. The method of claim 1,
The enforcement terminal is a smart transaction system using a proptech blockchain receiving an investment corresponding to a project coin from the block chain management server using the first authentication key. The method of claim 1,
The developer terminal selects a contractor using the block of the proptech block chain in which the second transaction is recorded, and provides a second authentication key and a part of the project coin to the selected contractor's contractor terminal to provide a second smart contract. Smart transaction system using the Proptech blockchain to achieve success. The method of claim 8,
The construction company terminal is a smart transaction system using a proptech block chain receiving an investment corresponding to a part of the project coin from the block chain management server using the second authentication key. The method of claim 1,
Proptech blockchain in which the validity of the project coin provided from the investor terminal is lost if the developer terminal does not provide information related to the progress of the construction project to the blockchain management server as the first transaction at every preset cycle Smart trading system using. The method of claim 1,
When the construction company terminal does not provide information related to the progress of the construction project to the blockchain management server as the second transaction at every preset cycle, the validity of some of the project coins provided from the developer terminal is lost. Smart transaction system using blockchain. In the operating method of a smart transaction system including a blockchain management server that manages transactions between an investor terminal, a developer terminal, and a contractor terminal by using a proptech blockchain distributed and stored in authorized nodes,
Providing, by the developer terminal, a first transaction to the blockchain management server to record information related to the construction project in the proptech blockchain;
Generating, by the block chain management server, a block of the proptech block chain, and recording the first transaction in the generated block;
Determining, by the investor terminal, an investment based on the block of the proptech block chain, and providing an investment money to the block chain management server;
Receiving, by the investor terminal, an amount of project coins corresponding to the investment funds from the blockchain management server; And
The operating method of a smart transaction system using a proptech blockchain comprising the step of the investor terminal providing the project coin and the first authentication key to the developer terminal to establish a smart contract for the construction project. The method of claim 12,
The method of operating a smart transaction system using a proptech blockchain, further comprising the step of receiving, by the developer terminal, an investment corresponding to a project coin from the block chain management server using the first authentication key. The method of claim 12,
Providing, by the construction company terminal, a second transaction to the blockchain management server to record construction-related information according to the construction project in the proptech blockchain; And
The method of operating a smart transaction system using a proptech block chain, further comprising the step of the block chain management server generating a block of the proptech block chain and recording the second transaction in the generated block. The method of claim 14,
The second smart contract by the developer terminal selecting a contractor using the block of the proptech block chain in which the second transaction was recorded, and providing a second authentication key and a part of the project coin to the selected contractor's contractor terminal. A method of operating a smart transaction system using a proptech block chain further comprising the step of concluding. The method of claim 15,
The method of operating a smart transaction system using a proptech blockchain further comprising the step of receiving, by the construction company terminal, an investment corresponding to a part of the project coin from the block chain management server by using the second authentication key.

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