TWI659377B - System for digitizing and trading unquantifiable asset and method thereof - Google Patents

Abstract

A system and method for digitizing and quantifying non-quantifiable assets through smart contracts, which issue asset smart contracts through a custody server and obtain corresponding asset contract addresses, and a trust server issues auction smart contracts that include asset contract addresses and deadlines And obtain the corresponding auction contract address, the buyer client sets the buyer address and the bid amount in the auction smart contract based on the auction contract address. When the cut-off condition is met, the auction smart contract selects the buyer address based on the bid amount, and based on the asset The contract address triggers the execution of the asset smart contract, so that the asset smart contract can perform asset transactions based on the selected buyer's address, which can improve the security of online transactions of high-priced items, and achieve the technical effect of reducing the money and time costs of buyers and sellers.

Description

System and method for digitizing non-quantifiable assets and trading with smart contracts

An asset transaction system and method thereof, particularly a system and method for digitizing and trading non-quantifiable assets using smart contracts.

With the development of technology and the Internet, various traditional behaviors are also transferred from the actual face-to-face to the Internet. For example, traditional transactions in physical stores have gradually shifted to online shopping. In addition to shopping on various shopping sites, you can also go to auction sites for transactions. At present, the most common auction methods provided by auction websites are sellers setting bidding time. Before the bidding time ends, the highest bidder is the winner.

Since buyers and sellers who use the auction website usually haven't met, they can't confirm the auction items. If the amount of the auction item is very large, for example, the auction item is a high-priced item such as real estate or gold diamonds, and there is no professional third-party unit to check in the middle, the buyer and the seller often make the high-priced item trade on the online auction website because of the trust problem Chance is very low. Therefore, the current method of buying and selling high-value items still uses the traditional method, that is, through an impartial third-party unit. However, through a third party agency, once the transaction is successful, the buyer and seller usually need to pay a third party agency agency fee.

In summary, it can be known that in the prior art, there has been a problem that people have no trust in online transactions of high prices for a long time. Therefore, it is necessary to propose improved technical means to solve this problem.

In view of the problem that people have no confidence in trading high-priced items online in the prior art, the present invention then discloses a system and method for digitizing and trading non-quantifiable assets with smart contracts, among which:

The system disclosed in the present invention for digitizing non-quantifiable assets through smart contracts and trading includes at least: a seller client to obtain the seller's address in the blockchain network; a custody server to generate and be delivered a trust Asset smart contracts corresponding to assets, and used to publish asset smart contracts to the blockchain, and obtain corresponding asset contract addresses, where the asset smart contract contains the seller's address; the trust server is used to receive the custody server The transmitted asset contract address generates an auction smart contract, and is used to publish the auction smart contract to the blockchain and obtain the corresponding auction contract address, wherein the auction smart contract includes the asset contract address and the cut-off condition; at least one The buyer client, the buyer client is used to obtain the buyer address and the auction contract address in the blockchain network, and set the buyer address and the bid amount in the auction smart contract according to the auction contract address; where the deadline is met At the time, the auction smart contract selects the buyer's address based on each bid amount, and Intelligent function execution asset transactions contract asset, the asset transfer transaction function be transferred under the standard amount of assets in accordance with the buyer's address is selected.

The method disclosed in the present invention for digitizing non-quantifiable assets through smart contracts and transacting includes at least: the seller client obtains the seller's address in the blockchain network; the storage server generates a corresponding asset that is delivered to the trust Asset smart contract, issue the asset smart contract to the blockchain, and obtain the corresponding asset contract address, where the asset smart contract contains the seller's address; the custody server sends the asset contract address to the trust server; the trust server generates an auction Smart contract, publish auction smart contract to the blockchain, and obtain the corresponding auction contract address, where the auction smart contract includes the asset contract address and deadline conditions; the buyer client obtains the buyer address in the blockchain network and Auction contract address, and set buyer address and bid amount in the auction smart contract according to the auction contract address; when the deadline is met, if the bidding function in the auction smart contract selects the buyer address, the bidding function is based on the asset The contract address triggers the execution of the asset transaction function in the asset smart contract, so that the asset Easy transfer function for transfers under the standard amount of the assets according to the buyer address.

The system and method disclosed in the present invention are as described above. The difference from the prior art is that the present invention issues an asset smart contract and obtains the corresponding asset contract address through a custodial server. The trust server issues an auction that includes the asset contract address and the deadline The smart contract enters the blockchain and obtains the corresponding auction contract address. The buyer client sets the buyer address and the bid amount in the auction smart contract according to the auction contract address. When the cut-off condition is met, the bid in the auction smart contract is settled. The function selects the buyer's address based on the bid amount, and triggers the execution of the asset transaction function in the asset smart contract based on the asset contract address, so that the asset transaction function conducts asset transactions based on the selected buyer address, thereby solving the problems of the previous technology , And can achieve the technical effect of reducing the cost of money and time for both buyers and sellers.

The features and implementations of the present invention will be described in detail below with reference to the drawings and examples. The content is sufficient to enable any person skilled in the relevant arts to easily and fully understand the technical means applied to solve the technical problems of the present invention and implement them accordingly, thereby realizing The effect that can be achieved by the present invention.

The invention can provide the buyer to bid on the asset corresponding to the asset smart contract in the auction smart contract. When the cut-off condition in the auction smart contract is met, the auction smart contract can trigger the asset smart contract to execute the asset transaction and the amount transfer. Among them, the assets mentioned in the present invention may be non-quantifiable items, such as real estate, art, etc., but the present invention is not limited thereto.

The smart contract (including smart contract for auction and smart contract for assets) mentioned in the present invention is a code that can be executed by a computer, and corresponds to a smart contract address. The smart contract address (including the auction contract address corresponding to the auction smart contract and the asset contract address corresponding to the asset smart contract) mentioned in the present invention is a node such as a device or a device that supports Blockchain technology. Obtain data containing the corresponding smart contract entity, for example, the value of a certain variable in the smart contract entity when it is in a specific block in the blockchain.

The following first illustrates the system operation of the present invention with the "system diagram" of the present invention, which refers to the system architecture diagram of digitizing non-quantifiable assets and trading using smart contracts. As shown in FIG. 1, the system of the present invention includes a storage server 110, a seller client 120, a buyer client 130, and a trust server 150. The storage server 110, the seller client 120, the buyer client 130, and the trust server 150 may be directly or indirectly connected to the blockchain network.

The storage server 110 may provide a connection with the seller client 120 and may connect with the trust server 150. The storage server 110 may be connected to the seller client 120 and / or the trust server 150 through a wired network such as Ethernet or a wireless network such as WiFi or Zigbee, but the present invention is not limited thereto.

The custody server 110 is responsible for generating an asset smart contract. The asset smart contract generated by the custody server 110 corresponds to the assets delivered by the seller to the trust. Generally speaking, the custody server 110 is usually provided by a group, unit, organization, or institution that provides trust to custody the seller's assets, but the invention is not limited thereto. In some embodiments, the asset smart contract generated by the custody server 110 may include the address used by the asset owner in the blockchain network. In the present invention, the address used by the owner of the asset is referred to as the "seller address".

The custody server 110 can store a variety of different smart contract templates in advance, and when an asset smart contract needs to be generated, a smart contract template corresponding to the asset is selected from the pre-stored smart contract templates according to the type of asset, and the selected smart contract template is used. Smart contract templates generate asset smart contracts. Among them, the above types of assets include, but are not limited to, real estate, real estate, jewelry, art, and so on. In some embodiments, the custodian server 110 may provide an input seller address, and when using the smart contract template to generate an asset smart contract, add the input seller address to the corresponding position of the smart contract template, so that the generated asset smart contract It contains the seller's address.

It is worth mentioning that the custody server 110 can generate different asset smart contracts for each asset, for example, different asset smart contracts for different real estate, and different asset smart contracts for different artworks.

The custody server 110 is also responsible for publishing the generated asset smart contract to the blockchain. In more detail, the custody server 110 can generate a blockchain transaction containing the generated asset smart contract, and send the generated blockchain transaction to the blockchain network. After the verification node receives the blockchain transaction sent by the custody server 110, it can create a block containing the asset smart contract in the received blockchain transaction and send the produced block to the blockchain network. On the road. When the block sent to the blockchain network is accepted, the block sent to the blockchain network will be added to the end of the blockchain. In this way, the asset smart contract included in the block It can be published to the blockchain.

In some embodiments, the custody server 110 may set the entered seller address to the issued asset smart contract after issuing the asset smart contract. That is, the custody server 110 can generate a blockchain transaction containing the entered seller address, and send the generated blockchain transaction to the blockchain network, so as to send the seller address in the blockchain transaction. Join the blockchain containing asset smart contracts. The process of setting the seller address in the asset smart contract is the same as that of issuing the asset smart contract, so the above is only a brief description.

The custody server 110 is also responsible for obtaining the asset contract address corresponding to the issued asset smart contract while publishing the asset smart contract to the blockchain, and transmitting the acquired asset contract address to the trust server 150. In some embodiments, the storage server 110 may also transmit the acquired asset contract address to the seller client 120.

Seller client 120 and buyer client 130 are devices or devices with data input, calculation and transmission capabilities, including but not limited to computers, mobile phones, tablets, watches, televisions, digital cameras, multimedia players, navigation devices, cars Use computer, Walkman, computer dictionary, e-book reader, TV game instrument, handheld game instrument, etc. In addition, the seller client 120 and / or the buyer client 130 may be connected to the trust server 150 through a wired network such as Ethernet or a wireless network such as WiFi or Zigbee, but the present invention is not limited thereto. In the present invention, the seller client 120 refers to a device or device operated by an owner of the asset (that is, the seller of the asset), and the buyer client 130 refers to a device or device operated by an object (that is, the buyer) who wants to purchase the asset device.

The seller client 120 is responsible for obtaining the seller address. Generally speaking, the seller client 120 may provide input of the seller address or read out the seller address from a storage medium (not shown) of the seller client 120, but the present invention is not limited thereto.

In some embodiments, the seller client 120 may receive the asset contract address transmitted by the custody server 110, and may obtain the corresponding asset smart contract from the blockchain according to the received asset contract address, and The acquired asset smart contract sets the acquired seller address. In addition, the seller client 120 may also obtain the agent address and the auction contract address obtained by the trust server 150, and set the obtained agent in the auction smart contract issued by the trust server 150 according to the obtained auction contract address. address.

In other words, the seller client 120 may generate a blockchain transaction including the obtained seller address and / or agent address, and send the generated blockchain transaction to the blockchain network, so as to send the block The seller address and / or agent address in the chain transaction are added to the blockchain containing the asset smart contract. The process of setting the seller address and / or agent address in the asset smart contract by the seller client 120 is the same as the asset smart contract issued by the storage server, so the above is only a brief description.

The buyer client 130 is responsible for obtaining the buyer address. Generally speaking, the seller client 120 may provide input of the buyer address or read out the buyer address from a storage medium (not shown) of the buyer client 130, but the present invention is not limited thereto. Among them, the address used by the user of the buyer client 130 in the blockchain network is referred to as "buyer address" in the present invention.

The buyer client 130 is responsible for obtaining the auction contract address obtained by the trust server 150, and according to the obtained auction contract address, the auction smart contract corresponding to the auction contract address issued by the trust server 150 in the blockchain is obtained, and Responsible for setting the bid amount in the obtained auction smart contract. That is, the buyer client 130 can generate a blockchain transaction that includes the buyer's address and the subscripted amount, and send the generated blockchain transaction to the blockchain network, so as to send the buyer in the blockchain transaction. The address and the bid amount are added to the blockchain containing the auction smart contract, so as to set the bid amount in the auction smart contract. The process of setting the bid amount in the auction smart contract by the buyer client 130 is the same as the asset smart contract issued by the storage server, so the above is only a brief description.

In some embodiments, the buyer client 130 may also obtain the agent address in advance, and may set the agent address in the auction smart contract issued by the trust server 150. Generally speaking, the buyer client 130 can set the agent address together with the bid amount. Among them, the buyer client 130 may provide a user of the buyer client 130 to enter the agent address to obtain the agent address, but the method for the buyer client 130 to obtain the agent address is not limited thereto.

Similar to the process of the buyer client 130 setting the bid amount in the auction smart contract, the blockchain transaction generated by the buyer client 130 may include the buyer address, the bid amount, and the agent address, so as to compare the bid amount with the agent The person address is set in the auction smart contract together. However, the present invention is not limited to this. The buyer client 130 may also generate different blockchain transactions including the buyer address and the bid amount, and the buyer address and the agent address, and send the two blockchain transactions to In the blockchain network, the bid amount and agent address are set into the auction smart contract respectively.

It is worth mentioning that after the buyer client 130 sets the agent address to the auction smart contract issued by the trust server 150, the auction smart contract can trigger the execution of the subscript in the asset smart contract issued by the custody server 110 The agent function is used to transfer the bid amount set by the buyer client 130 to the auction smart contract from the buyer account used by the user of the buyer client 130 to the agent account. In more detail, the auction smart contract can be executed when the agent address is set, and the corresponding asset smart contract can be obtained according to the asset contract address contained in the blockchain where it is located, and the auction smart contract can be obtained. The buyer's address, agent's address, and bid amount in the bid, and then use the obtained buyer's address, agent's address, and bid amount as parameters to call the bid agent function in the obtained asset smart contract. The bidding agent function can obtain the corresponding buyer account according to the buyer address and the corresponding agent account according to the agent address, and can transfer the bid amount from the buyer account to the agent account. In some embodiments, the buyer's account and the agent's account can be account-linked accounts, and the bidding agent function can complete the transfer of the subscribed amount by calling the smart contract of the account-linked network, but the method of the bidding agent function transfer is not This is the limit.

The trust server 150 is responsible for receiving the asset contract address transmitted by the custody server 110, and is responsible for generating an auction smart contract. The auction smart contract generated by the trust server 150 includes the received asset contract address, the bid closing function, and the deadline. The above-mentioned cut-off condition is one or more judgment formulas, and each judgment formula may include one or more check values. For example, when the judgment formula is to determine whether the bid amount is consistent with the bid amount, the check value is the bid amount. When the judgment formula is to judge whether the current time exceeds the cut-off time, the check value is the closing time, but the cut-off conditions mentioned in the present invention are not limited to the above.

The trust server 150 may store a smart contract template in advance, and when an auction smart contract needs to be generated, an auction smart contract is generated according to the pre-stored smart contract template. Wherein, the cut-off condition in the smart contract template stored by the trust server 150 may include a defined check value, and the trust server may add the received asset contract address to the smart contract template, so as to rely on the intelligence of the added asset contract address. The contract template generates an auction smart contract; the cut-off condition in the smart contract template stored in the trust server 150 may not include the check value. The trust server may add the check value and the asset contract address to the corresponding positions in the smart contract template, thereby Generate auction smart contracts. However, the manner in which the trust server 150 generates the auction smart contract is not limited to the above.

The trust server 150 is also responsible for publishing the generated auction smart contract to the blockchain and obtaining the corresponding auction contract address. Similar to the custody server 110, the trust server 150 can generate a blockchain transaction containing the generated auction smart contract, and send the generated blockchain transaction to the blockchain network, so that the auction smart contract is When publishing to the blockchain, at the same time, the trust server 150 can also obtain the auction contract address corresponding to the auction smart contract published in the blockchain while publishing the auction smart contract into the blockchain. The process by which the trust server 150 publishes the auction smart contract to the blockchain is the same as the process by which the custodial server 110 publishes the asset smart contract to the blockchain, so there is only a brief description.

It is worth mentioning that when the cut-off condition in the auction smart contract issued by the trust server 150 is satisfied, the bid closing function in the auction smart contract can be executed in the blockchain network. Generally speaking, blockchain programs cannot provide automatic execution of auction smart contracts. Therefore, devices or equipment in the blockchain network, such as the trust server 150, can drive the bidding in auction smart contracts at regular intervals or periodically. Function, so that the closing function is executed in the blockchain network. When the bidding function is executed, you can first determine whether the entity with the same bidding function is running or has completed execution, or whether the bidding function has been executed. If so, the bidding function can end. Run, if not, the bidding function can continue to execute. In addition, in the present invention, a blockchain program (such as a private blockchain network) can also be modified so that the bid closing function in the auction smart contract can be automatically executed.

When the bid closing function in the auction smart contract is executed, the bid winner can be determined according to all the bid amounts set in the auction smart contract, and the execution of the asset can be triggered according to the asset contract address in the blockchain where it is located. Smart contracts, through which asset bidders and sellers conduct asset transactions and money transfers. In more detail, the bidding conclusion function in the auction smart contract can select the highest amount from all the bid amounts, so that the buyer's address set in the auction smart contract can be selected together with the selected bid amount. The address of the bidder, and the asset smart contract corresponding to the asset contract address can be obtained from the blockchain according to the asset contract address in the blockchain in which it is located, and the amount of the selected bid and the amount of the bid The amount is also set to the buyer's address in the auction smart contract (hereinafter referred to as the "winner address") as a parameter to call the asset transaction function in the asset smart contract, so that the asset transaction function can be linked with the asset The seller's address in the smart contract is set as the address of the successful bidder, so that the owner of the asset corresponding to the smart contract of the asset can be transferred from the seller to the successful buyer. In addition, the asset transaction function can also select the selected bid amount. Transfer from the buyer account corresponding to the address of the successful bidder to the seller account corresponding to the seller's address. The seller's account and the buyer's account can be accounts connected to the account, and the asset transaction function can transfer the subscribed amount from the buyer's account to the seller's account through the smart contract in the account's connection, but the invention is not limited thereto.

In some embodiments, if the buyer client 130 sets the bid amount in the auction smart contract, it also sets the agent address in the auction smart contract. Then when the bid closing function in the auction smart contract triggers the execution of the asset smart contract, the selected bid amount, the address of the successful bidder, and the address of the agent set together with the successful bidder's address can be used as parameters to call The asset transaction function in the asset smart contract is similar to the above. The asset transaction function can set the seller's address in the asset smart contract as the address of the successful bidder, so that the owner of the asset corresponding to the asset smart contract can be changed by the seller. Transfer to the buyer. In addition, the agent transaction function can also transfer the selected bidding amount from the agent account corresponding to the agent address set with the address of the successful bidder to the seller account corresponding to the seller address. Among them, if the agent account and the seller account are both account-connected accounts, the asset transaction function can transfer the subscribed amount from the agent account to the seller account through the smart contract in the account network, but the present invention does not take this as an example. limit.

In addition, the bidding conclusion function in the auction smart contract can also be obtained from the auction smart contract one by one along with the buyer address of the non-bidder address and set to the bid amount and agent address in the auction smart contract. The bid amount, the agent address, and the obtained buyer address are used as parameters, and the bid amount return function in the asset smart contract is called, so that the bid amount return function sets the bid amount from the agent account corresponding to the agent address The buyer's account corresponding to the buyer's address is transferred back, whereby the bid amount is transferred from the agent to the unsuccessful bidder.

In some embodiments, the trust server 150 may transmit the obtained auction contract address to the seller client 120.

Next, an embodiment is used to explain the operating system and method of the present invention, and please refer to "Figure 2A" for a flowchart of a method for digitizing and quantifying non-quantifiable assets using smart contracts. In this embodiment, it is assumed that neither the buyer nor the seller transacts through an agent.

First, the seller of the asset may first operate the seller client 120 to obtain the seller address used in the blockchain network (step 201). Similarly, the buyer who wants to purchase the asset may first operate the buyer client 130 to obtain the seller's address on the blockchain network. Buyer address used on the road.

In addition, the seller of the asset can provide the asset or all documents of the asset to the trusteeship center, thereby delivering the asset to the trust, and the custody server 110 provided by the trusteeship center can generate assets corresponding to the assets provided by the seller to the trusteeship center. The smart contract (step 211), and the generated asset smart contract is published to the blockchain, and at the same time, the asset contract address corresponding to the issued asset smart contract is obtained (step 215). In this embodiment, it is assumed that the asset is real estate, and the asset smart contract generated by the custody server 110 is an asset smart contract corresponding to the real estate. Among them, the custody server 110 may provide input of the seller address obtained by the seller client 120, and set the seller address as the owner address in the issued asset smart contract, so that the seller address is added to include the assets issued by the custody server 110. In the smart contract blockchain, as such, through the asset smart contract corresponding to the asset, the seller is the owner of the asset.

After the custody server 110 issues the asset smart contract to the blockchain and obtains the corresponding asset contract address, the custody server 110 may transmit the acquired asset contract address to the trust server 150.

After the trust server 150 receives the asset contract address transmitted by the custody server 110, the trust server 150 can generate an auction smart contract (step 221), and publish the generated auction smart contract to the blockchain, and publish it At the same time as auctioning the smart contract, the transaction contract address corresponding to the issued auction smart contract is obtained (step 225). Then, the trust server 150 may set the received asset contract address in the generated auction smart contract, so as to add the received asset contract address to the blockchain containing the auction smart contract. The auction smart contract generated by the trust server 150 further includes a cut-off condition. In this embodiment, it is assumed that the cut-off condition is that the current time is greater than the cut-off time.

After that, the trust server 150 can publicize the obtained auction contract address, so that the buyer can operate the buyer client 130 to obtain the auction contract address, and can bid in the auction smart contract based on the obtained auction contract address, that is, in the auction smart The buyer's address and bid amount are set in the contract (step 251). In this embodiment, it is assumed that there are multiple buyers who want to purchase the seller's real estate. The buyer client 130 used by each buyer can obtain the auction smart contract in the blockchain according to the auction contract address disclosed by the trust server 150. The buyer's address and the bid amount are added to the blockchain containing the auction smart contract. In this way, the auction smart contract can contain multiple buyer addresses and bid amounts.

After the trust server 150 publishes the auction smart contract to the blockchain, the auction smart contract can be automatically executed in the blockchain network, and the closing function in the auction smart contract can continuously check the included deadline. Whether the conditions are met. In this embodiment, it is determined whether the current time is greater than the cut-off time. If the cut-off condition is not met, that is, the current time is less than or equal to the cut-off time, the closing function can continue to check the cut-off condition.

If the cut-off condition is met, the bid closing function can select the buyer address corresponding to the maximum bid amount from all the bid amounts set to the auction smart contract, and based on the asset contract address included in the auction smart contract. Trigger the execution of the asset transaction function in the asset smart contract (step 270). In this embodiment, that is, when the bid closing function judges that the current time is greater than the cut-off time, it selects a maximum bid amount, and selects the buyer address set in the auction smart contract together with the selected bid amount. The address of the successful bidder, and the parameters of the successful bidder's address and the selected bid amount, are used to call the asset transaction function.

When the asset transaction function in the asset smart contract is called and started to execute, the asset transaction function can be performed according to the address of the successful bidder in the call parameters (which is set to the buyer's address in the auction smart contract along with the bid amount). Transfer of assets and transfer of subscribed amounts (step 285). In this embodiment, the asset transaction function can set the address of the successful bidder in the asset smart contract as the new owner's address, and transfer the bid amount from the buyer's account corresponding to the successful bidder's address to The seller account corresponding to the seller address originally set in the asset smart contract. In this way, asset transactions can be completed online through the present invention.

In the above embodiment, if the asset smart contract restricts the transfer of assets only through the agent address, after the trust server 150 issues the auction smart contract and obtains the corresponding auction contract address (step 225) The trust server 150 may transmit the obtained auction contract address to the seller client 120, and the seller client 120 may obtain an agent address, and may obtain a corresponding auction from the blockchain according to the received auction contract address. The smart contract, and the obtained agent address and seller address are added to the blockchain containing the auction smart contract, so as to set the agent address in the auction smart contract.

In this way, when the asset transaction function in the asset smart contract is triggered and executed, it can be determined whether the address used by the executor in the blockchain network is the same as the agent address set by the seller client 120. If so, then The asset transaction function can continue to be executed, that is, the asset is transferred and the bid amount is transferred according to the buyer's address (step 285). If not, the asset transaction function will be stopped and the asset transaction will not be performed.

In addition, in the above embodiment, if the buyer client 130 obtains the auction contract address and subscribes in the auction smart contract based on the obtained auction contract address, the buyer address and the bid amount are set in the auction smart contract. , And the agent address (step 250). As shown in the flow of "Figure 2B", the auction smart contract can trigger the execution of the bidding agent function in the asset smart contract (step 261), that is, the buyer address and the bid amount to be set in the auction smart contract. , And the agent address as a parameter, call the subscript agent function, so that when the subscript agent function is executed, the subscript amount is transferred from the buyer account corresponding to the buyer address to the agent account corresponding to the agent address ( Step 265).

Later, when the cut-off condition in the auction smart contract is met, if the buyer's address is selected as the address of the successful bidder by the bid closing function in the auction smart contract, the bid closing function can The bid amount and the agent address are used as parameters to call the asset transaction function in the asset smart contract to trigger the execution of the asset transaction function (step 270). When the asset transaction function is executed, the bidder's address can be set as the new owner's address in the asset smart contract, and the subscribed amount is transferred from the agent account corresponding to the agent address to the original through the account network. The seller account corresponding to the seller address set in the asset smart contract.

In addition, in the present invention, after the bidding closing function in the smart contract calls the asset transaction function in the asset smart contract, the bidding closing function can also call Bid return function to trigger the execution of the bid return function (step 291), so that the bid return function will be set in the auction smart contract together with the address of the person who has not been selected as the bid winner. The address of the selected bidder is set in the agent account corresponding to the agent address in the auction smart contract and transferred back to the buyer account corresponding to the address of the unselected bidder (step 295). In this way, the bid closing function can complete the asset transaction through the asset smart contract.

In summary, it can be seen that the difference between the present invention and the prior art is that the custody server issues an asset smart contract and obtains the corresponding asset contract address, and the trust server issues an auction smart contract that includes the asset contract address and the cut-off condition to the district The corresponding auction contract address is obtained in the block chain. The buyer client sets the buyer address and the bid amount in the auction smart contract according to the auction contract address. When the cut-off condition is met, the bidding function in the auction smart contract is based on Select the buyer's address for the bid amount, and trigger the execution of the asset transaction function in the asset smart contract according to the asset contract address, so that the asset transaction function can perform asset transaction technical means based on the selected buyer address. This technology can solve the previous technology There is a problem that people do not have a sense of trust in trading high-priced items online, thereby achieving the technical effect of reducing the money and time costs of buyers and sellers.

Furthermore, the method for digitizing non-quantifiable assets and trading in smart contracts according to the present invention can be implemented in hardware, software or a combination of hardware and software, and can also be implemented in a centralized manner in computer systems or distributed with different components. Decentralized in several interconnected computer systems.

Although the embodiments disclosed in the present invention are as described above, the content is not intended to directly limit the patent protection scope of the present invention. Any person with ordinary knowledge in the technical field to which the present invention pertains, without departing from the spirit and scope disclosed by the present invention, can make minor modifications to the form and details of the implementation of the present invention, which belongs to the patent protection of the present invention. range. The scope of patent protection of the present invention must still be defined by the scope of the attached patent application.

110‧‧‧Storage server

120‧‧‧Seller Client

130‧‧‧Buyer client

150‧‧‧trust server

Step 201‧‧‧ The seller client obtains the seller address in the blockchain network

Step 211‧‧‧ The custody server generates an asset smart contract corresponding to the assets of the delivery trust

Step 215‧‧‧ The custody server issues the asset smart contract to the blockchain and obtains the corresponding asset contract address

Step 221‧‧‧ The trust server generates an auction smart contract containing the asset contract address

Step 225‧‧‧ Trust server issues the auction smart contract to the blockchain and obtains the corresponding auction contract address

Step 250‧‧‧The buyer client obtains the auction contract address, and sets the buyer address, the bid amount and the agent address in the auction smart contract according to the auction contract address.

Step 251‧‧‧ The buyer client obtains the auction contract address, and sets the buyer address and the bid amount in the auction smart contract according to the auction contract address.

Step 261‧‧‧The auction of the smart contract triggers the execution of the bidding agent function of the asset smart contract

Step 265‧‧‧Subscript agent function transfers the bid amount from the buyer's account to the agent's account

Step 270‧‧‧When the deadline is met, the bidding function in the auction smart contract selects the buyer address, and triggers the execution of the asset transaction function in the asset smart contract based on the asset contract address.

Step 285‧‧‧Asset transaction function transfers assets and transfers bid amount based on buyer's address

Step 291‧‧‧The bid closing function triggers the execution of the bid return function in the asset smart contract

Step 295‧‧‧ Tender amount return function transfers the bid amount from the agent account to the buyer's account

FIG. 1 is a system architecture diagram of digitizing non-quantifiable assets and trading using smart contracts in the present invention. FIG. 2A is a flowchart of a method for digitizing non-quantifiable assets and trading using a smart contract according to the present invention. FIG. 2B is a flowchart of a method for setting a proxy address by a buyer client according to the present invention. FIG. 2C is a flowchart of a method for transferring the subscribed amount from the agent account to the buyer account according to the present invention.

Claims (10)

A method for digitizing non-quantifiable assets and trading with smart contracts, which is applied to a blockchain network. The method includes at least the following steps: A seller client obtains a seller address in the blockchain network; A custody server generates an asset smart contract corresponding to an asset of the trust being delivered, issues the asset smart contract to a blockchain, and obtains a corresponding asset contract address, where the asset smart contract contains the The seller's address; the custody server sends the asset contract address to a trust server; the trust server generates an auction smart contract, publishes the auction smart contract to the blockchain, and obtains a corresponding auction contract address, The auction smart contract includes the asset contract address and a cut-off condition; a buyer client obtains a buyer address and the auction contract address in the blockchain network, and based on the auction contract address in the auction smart contract Set the buyer's address and the bid amount; and when the deadline is met, if the auction smart contract The bidding function selects the buyer address, then the bidding function triggers the execution of an asset transaction function in the asset smart contract based on the asset contract address, so that the asset transaction function performs the transfer of the asset according to the buyer address Transfer with the bid amount. As described in item 1 of the scope of patent application, the method of digitizing and quantifying non-quantifiable assets with smart contracts and trading, wherein the method further includes the trust server transmitting the auction contract before the buyer client obtains the auction contract address. An address to the seller client, and the seller client setting a proxy address in the auction smart contract according to the auction contract address. As described in item 1 of the scope of the patent application, the method of digitizing and quantifying non-quantifiable assets with smart contracts and trading, wherein the buyer client sets the bid amount in the auction smart contract according to the auction contract address, and further includes the The buyer client sets an agent address in the auction smart contract, so that the auction smart contract triggers execution of a bidding agent function in the asset smart contract, so that the bidding amount is set by a buyer account corresponding to the buyer address The step of transferring money to a proxy account corresponding to the proxy address. As described in item 3 of the scope of the patent application, the method of digitizing non-quantifiable assets and trading with smart contracts, wherein the method further includes when the deadline is met, if the buyer address is not selected by the bid closing function, then The bid settlement function triggers a step of executing a bid return function in the asset smart contract to transfer the bid amount from the agent account to the buyer account. As described in item 1 of the scope of the patent application, the method of digitizing and quantifying non-quantifiable assets using smart contracts and transactions, wherein the step of transferring the bid amount by the bid settlement function is that the asset transaction function transfers the account via the account network. A system that digitizes and quantifies non-quantifiable assets using smart contracts is applied to a blockchain network. The system includes at least: a seller client to obtain a seller address in the blockchain network. A custody server for generating an asset smart contract corresponding to the assets of the trust being delivered, and for issuing the asset smart contract to a blockchain and obtaining a corresponding asset contract address, of which, The asset smart contract includes the seller's address; a trust server for receiving the asset contract address transmitted by the custody server, generating an auction smart contract, and issuing the auction smart contract to the blockchain And obtain a corresponding auction contract address, wherein the auction smart contract includes the asset contract address and a deadline; and at least one buyer client, each buyer client is used to obtain the blockchain network One of the buyer's address and the auction contract address, and set the buyer address and the bid amount in the auction smart contract according to the auction contract address; When the cut-off condition is satisfied, the auction smart contract selects a buyer address according to each bid amount, and triggers the execution of an asset transaction function of the asset smart contract based on the asset contract address, so that the asset transaction function The transfer of the asset and the transfer of the bid amount are performed according to the selected buyer address. The system for digitizing and trading non-quantifiable assets using smart contracts as described in item 6 of the scope of patent application, wherein the trust server is further used to transmit the auction contract address to the seller client, and the seller client is further used An agent address is set in the auction smart contract according to the auction contract address. The system for digitizing and trading non-quantifiable assets with smart contracts as described in item 6 of the scope of patent application, wherein the at least one buyer client is further used to set an agent address in the auction smart contract so that the auction smart contract Trigger the execution of a bidding agent function in the asset smart contract, thereby transferring the bidding amount set by the at least one buyer client from a buyer account corresponding to the buyer address obtained by the at least one buyer client to the buyer account The proxy address corresponds to one of the proxy accounts. As described in item 8 of the scope of the patent application, a system for digitizing and trading non-quantifiable assets with smart contracts, wherein the bid closing function is further used to call a bid return function in the asset smart contract, so as to obtain The subscribed amount set by the at least one buyer client of the selected buyer address is transferred from the agent account to the buyer account. As described in item 6 of the scope of the patent application, a system for digitizing and trading non-quantifiable assets using smart contracts, wherein the asset transaction function is to transfer the subscribed amount through the account network.