KR20200112557A - Method and device for a transparent lottery system by using a blockchain network - Google Patents

Abstract

The present invention relates to a method for a transparent draw based on a blockchain network. The method includes: (a) a step in which a service server causes a hash module to generate user hash values corresponding to draw participation requests and including first to N-th user hash values when the draw participation requests including first to N-th draw participation requests are acquired from user terminals, performs response for each group including a preset number of the draw participation requests by applying at least one first hash operation to the user hash values, causes at least one group hash value including first to K-th group hash values to be generated, and then transmits the group hash values to a blockchain network; (b) a step in which the service server causes a draw smart contract registered in the blockchain network to generate at least one base hash value by referring to the transmitted group hash values and causes the base hash value to be transmitted to the service server or another device; and (c) a step in which the service server causes its determination module to determine at least one specific winning user terminal among the user terminals by referring to the base hash value or causes the other device to determine the specific user terminal among the user terminals by referring to the base hash value.

Description

Method and device for transparently performing lottery using a blockchain network {METHOD AND DEVICE FOR A TRANSPARENT LOTTERY SYSTEM BY USING A BLOCKCHAIN NETWORK}

The present invention relates to a method of transparently performing a lottery using a blockchain network.

It is difficult to distribute limited resources fairly, such as popular liberal arts classes that everyone wants to take, world star concert seats, and holiday high-speed train boarding passes. In most cases, a simple digital first-come-first-served basis is used to allocate these limited resources, distributing the resources to the person who made the application faster on the Internet. However, in the digital first-come-first-served basis, there is a problem in that the winner is determined based on unreasonable factors such as internet speed and computer operation speed of the region.

One of several experimental methods suggested to replace this is the random lottery method. It has the advantage of not being affected by irrational factors such as those described above, as a method of receiving an application for obtaining a corresponding resource for a predetermined period of time and randomly determining a winner among them. However, the disadvantage of this method is that the lottery process is not transparent and it is difficult to gain the trust of applicants. In other words, when a lottery is made by itself inside the server, the person in charge can arbitrarily decide a specific applicant as a winner, and so can commit irregularities, so that applicants do not trust the lottery process.

Meanwhile, the blockchain technology is a technology that prevents data tampering based on distributed computing technology by storing managed data in a block, which is a distributed data storage environment in the form of a chain created based on the P2P method.

When such a block chain technology is combined with the above-described random lottery method, the lottery process can be transparently disclosed, so that only the advantages of the random lottery method can be taken and the disadvantages are eliminated, but such attempts are absent.

An object of the present invention is to solve the above-described problems.

An object of the present invention is to provide a method of transparently performing a lottery using a blockchain network, so that resources can be distributed in a fair manner in which applicants can trust the lottery method.

In addition, an object of the present invention is to promote the convenience of the side of distributing resources by providing a method for transparently performing a lottery using a blockchain network and allowing each member to win with a different probability.

The characteristic configuration of the present invention for achieving the object of the present invention as described above and realizing the characteristic effects of the present invention described later is as follows.

According to an aspect of the present invention, in a method of transparently performing a lottery using a blockchain network, (a) a plurality of lottery participation requests including a first lottery participation request or an N-th lottery participation request from user terminals When they are obtained, the service server causes the hash module to generate a plurality of user hash values including a first user hash value to an N-th user hash value corresponding to the lottery participation requests, and the user hash values By applying at least one first hash operation to, corresponding to each of one or more groups including a predetermined number of the lottery participation requests, and one or more group hash values including a first group hash value to a Kth group hash value After allowing them to be generated, transmitting the group hash values to a blockchain network; (b) The service server causes the lottery smart contract registered in the blockchain network to generate at least one base hash value by referring to the transmitted group hash values, and the base hash value is the service server Or allowing it to be delivered to another device; And (c) the service server causes a determination module included in itself to determine at least one specific user terminal that has been won among the user terminals by referring to the base hash value, or causes the other device to And determining the specific user terminal from among the user terminals by referring to the base hash value; Disclosed is a method comprising a.

As an example, the step (a), the service server, the hash module, for each group including a specific number of lottery participation requests corresponding to a preset pool size, user hash values included in each group Disclosed is a method characterized in that the group hash values are generated for each of the groups by applying the first hash operation to.

As an example, the step (a) is characterized in that the service server transmits the group hash values to the blockchain network by generating a transaction each time the group hash value is generated, and the step (b) , The service server causes the lottery smart contract to generate an Mth group hash value-M is an integer of 1 or more and K or less-is obtained, the accumulated hash value corresponding to the first group hash value to the M-1th group hash values And, the accumulated hash value is updated by applying at least one second hash operation to the newly acquired M-th group hash value, and the updated accumulated hash value is repeated each time a new group hash value is obtained. Disclosed is a method characterized in that the base hash value is generated by determining the hash value as the base hash value.

As an example, the step (a) is characterized in that the service server transmits the group hash values to the blockchain network by generating a transaction after the group hash values are generated for a predetermined number or for a predetermined period, and the Step (b) discloses a method characterized in that the service server causes the lottery smart contract to generate the base hash value by generating a tree structure using the group hash values.

As an example, in the step (a), the lottery participation requests include membership information of users who use the user terminals, and the service server classifies the lottery participation requests according to the membership information, and then the hash For the module to generate the group hash values for each of the number of lottery participation requests corresponding to a variable pool size according to the respective membership information for the lottery participation requests classified to have the same membership information. The characterized method is disclosed.

As an example, in step (b), the service server causes the lottery smart contract to generate each of the base hash values for each of the membership information by referring to the group hash values, and the ( In step c), the service server causes the determination module to determine a winning specific user terminal among the user terminals for each of the membership information, with reference to each of the base hash values, or the other Disclosed is a method, characterized in that causing an apparatus to determine the specific user terminal for each of the membership information by referring to each of the base hash values.

As an example, the step (a) is characterized in that when the service server transmits the group hash values to the blockchain network, sequence collation is prevented by alternately using a plurality of network addresses corresponding to the blockchain network. A method of doing this is disclosed.

As an example, the step (c), the service server, the determination module or the other device, with reference to the result of listing the absolute values of the difference between the user hash values and the base hash value in order of size. A method is disclosed, characterized in that the specific user terminals are determined.

As an example, in step (c), the service server causes the determination module or the other device to refer to a result of listing the absolute values in order of increasing size, starting from the absolute value located at the front of the result. Select user hash values corresponding to absolute values up to a specific absolute value, but select specific user hash values by selecting the ratio of the number of selected user hash values to the number of total user hash values according to a preset ratio The method is disclosed, wherein the specific user terminals are determined by selecting user terminals corresponding to the specific user hash values.

According to another aspect of the present invention, there is provided a service server for transparently performing a lottery using a block chain network, comprising: at least one memory for storing instructions; And one or more processes configured to perform the instructions, wherein the processor comprises: (I) when a plurality of lottery participation requests including a first lottery participation request to an N-th lottery participation request from user terminals are obtained, a hash module Allows to generate a plurality of user hash values including a first user hash value to an N-th user hash value corresponding to the lottery participation requests, and applies at least one first hash operation to the user hash values By doing so, after generating one or more group hash values corresponding to one or more groups including a predetermined number of the lottery participation requests and including a first group hash value to a Kth group hash value, the group hash value The process of delivering them to the blockchain network; (II) Have the lottery smart contract registered in the blockchain network generate at least one base hash value by referring to the transmitted group hash values, and transmit the base hash value to the service server or other device The process to make And (III) causing a determination module included in the service server to determine at least one specific user terminal that has been won among the user terminals by referring to the base hash value, or to cause the other device to determine the base hash value. Disclosed is a service server, comprising: a process of determining the specific user terminal among the user terminals by referring to a value.

As an example, in the (I) process, the processor, the hash module, for each group including a specific number of lottery participation requests corresponding to a preset pool size, to user hash values included in each group. A service server is disclosed, wherein the group hash values are generated for each of the groups by applying the first hash operation.

As an example, the process (I) is characterized in that the processor transmits the group hash values to the blockchain network by generating a transaction each time the group hash value is generated, and the (II) process, When the processor causes the lottery smart contract to obtain an Mth group hash value-M is an integer of 1 or more and K or less-is obtained, a cumulative hash value corresponding to the first group hash value to the M-1th group hash values, and The accumulated hash value is updated by applying at least one second hash operation to the newly acquired M-th group hash value, and the updated hash value is updated by repeating such an update process each time a new group hash value is obtained. A service server is disclosed, wherein the base hash value is generated by determining as the base hash value.

As an example, the process (I) is characterized in that the processor transmits the group hash values to the blockchain network by generating a transaction after the group hash values are generated for a predetermined number or for a predetermined period, and the ( II) process, the service server is disclosed, characterized in that the processor causes the lottery smart contract to generate the base hash value by creating a tree structure using the group hash values.

As an example, in the (I) process, the lottery participation requests include membership information of users using the user terminals, and the processor classifies the lottery participation requests according to the membership information, and then the hash module In response to the lottery participation requests classified to have the same membership information, the group hash values are generated for each lottery participation request corresponding to a variable pool size according to each membership information. The service server is started.

As an example, in the (II) process, the processor causes the lottery smart contract to generate each of the base hash values for each of the membership information by referring to the group hash values, and the (III) ) The process allows the processor to make the determination module determine a winning specific user terminal among the user terminals for each of the membership information, with reference to each of the base hash values, or to the other device A service server is disclosed, wherein the specific user terminal is determined for each of the membership information by referring to each of the base hash values.

As an example, the process (I) is characterized in that when the processor transmits the group hash values to the blockchain network, sequence collation is prevented by alternately using a plurality of network addresses corresponding to the blockchain network. The service server to perform is started.

As an example, the (III) process, the processor, the determination module or the other device, with reference to the result of listing the absolute values of the difference between the user hash values and the base hash value in order of size, the Disclosed is a service server, characterized in that for determining specific user terminals.

As an example, in the (III) process, the processor, with reference to the result of listing the absolute values in the order of increasing size, causes the determination module or the other device to specify from the first absolute value in the result. Select user hash values corresponding to absolute values up to the absolute value, but select specific user hash values by selecting the ratio of the number of selected user hash values to the number of total user hash values according to a preset ratio. And, a service server is disclosed, wherein the specific user terminals are determined by selecting user terminals corresponding to the specific user hash values.

The present invention provides a method of transparently performing a lottery using a blockchain network, so that resources can be distributed in a fair manner in which applicants can trust the lottery method.

In addition, the present invention provides a method of transparently performing a lottery using a block chain network and allowing each membership to win with a different probability, thereby promoting the convenience of the resource distribution side.

1 is a diagram showing the configuration of a service server for performing a transparent lottery method using a blockchain network according to an embodiment of the present invention.
2 is a diagram illustrating a relationship between a service server and a blockchain network for performing a transparent lottery method using a blockchain network according to an embodiment of the present invention.
3 is a flowchart showing a method of transparently performing a lottery using a blockchain network according to an embodiment of the present invention.
4 is a flowchart illustrating a method of performing a lottery differently according to membership, as an example of a method of transparently performing a lottery using a blockchain network according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The detailed description of the present invention to be described later refers to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in detail sufficient to enable a person skilled in the art to practice the present invention. It is to be understood that the various embodiments of the present invention are different from each other, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention in relation to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description to be described below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scopes equivalent to those claimed by the claims. Like reference numerals in the drawings refer to the same or similar functions over several aspects.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to enable those of ordinary skill in the art to easily implement the present invention.

1 is a diagram showing the configuration of a service server for performing a transparent lottery method using a blockchain network according to an embodiment of the present invention.

Referring to FIG. 1, the service server 100 may include a hash module 130 and a determination module 140. In this case, input/output and operation processes of the hash module 130 and the determination module 140 may be performed by the communication unit 110 and the processor 120, respectively. However, in FIG. 1, a specific connection relationship between the communication unit 110 and the processor 120 is omitted. At this time, the memory 115 may be in a state in which various instructions to be described later are stored, and the processor 120 is set to execute instructions stored in the memory 115, but the processor 120 performs processes to be described later. By doing this, the present invention can be carried out. The description of the service server 100 as described above does not exclude the case where the service server 100 includes an integrated processor in which a medium, a processor, and a memory are integrated for carrying out the present invention.

As described above for the service server 100, reference will be made to FIG. 2 to describe the block chain network 200 linked to the service server 100 and the linkage relationship thereof.

2 is a diagram illustrating a relationship between a service server and a blockchain network for performing a transparent lottery method using a blockchain network according to an embodiment of the present invention.

Since the blockchain network 200 linked with the service server 100 must have registered a lottery smart contract to be described later, it may be a block chain employing a smart contract method, which may be an Ethereum network representatively. It is not limited. Several nodes will exist in the blockchain network 200, and base hash values and group hash values shown in FIG. 2 will be stored in each of the nodes.

The service server 100 and the blockchain network 200 may be linked through an API, and the API may include functions indicated by arrows in FIG. 2. Specifically, the API may include a Startsortition() function, an AddApplicatns(HASH) function, a CloseSortition() function, and a GetBaseHash() function, and each function will be described together while specifically describing the lottery method of the present invention. do.

In addition, various hash values such as a user hash value, a group hash value, and a base hash value are displayed in FIG. 2. The group hash value is a value representing a plurality of user hash values, and the base hash value is one or more group hash values. As a representative value, specific contents will be described together with a detailed description of the lottery method of the present invention.

Referring to FIG. 3 to explain the lottery method of the present invention.

3 is a flowchart showing a method of transparently performing a lottery using a blockchain network according to an embodiment of the present invention.

Referring to FIG. 3, the overall configuration of the present invention, that is, after the calculation is performed in the hash module 130, the calculation is performed in the blockchain network 200, and finally, the calculation is performed in the determination module 140. I can confirm.

Specifically, when a plurality of lottery participation requests including a first lottery participation request to an N-th lottery participation request are obtained from the user terminals, the service server 100 causes the hash module 130 to make the lottery participation requests A plurality of user hash values including a first user hash value to an Nth user hash value corresponding to may be generated. That is, whenever lottery participation requests are obtained, user hash values corresponding to each lottery participation request are allocated. Such user hash values may be disclosed in the server to ensure reliability.

Thereafter, the service server 100 causes the hash module 130 to apply at least one first hash operation to user hash values, so that one corresponding to one or more groups including a predetermined number of lottery participation requests More than one group hash value can be created. Such group hash values may include a first group hash value to a Kth group hash value.

When describing the group hash values in more detail, the service server 100 causes the hash module 130 to, for each group including a specific number of lottery participation requests corresponding to a preset pool size, to each group. Group hash values may be generated for each group by applying a first hash operation to included user hash values. For example, if the preset pool size is 100, it means that 100 lottery participation requests are grouped, and a group hash value representing 100 lottery participation requests is generated by applying a first hash operation to the user hash values. .

Such group hash values may be generated by a first hash operation, and the first hash operation may be at least some of several well-known hash functions, that is, hash functions such as MD5, SHA, or CRC. In addition, according to embodiments, a different first hash operation may be used for each group.

Thereafter, in one embodiment, the service server 100 may transmit the group hash values to the blockchain network by generating a transaction each time the group hash value is generated. This is assumed to be a case where the service server 100 sequentially acquires lottery participation requests, generates a group hash value each time the above-described specific number is filled, and transmits the group hash value to the blockchain network 200. At this time, before generating a transaction, the API's Startsortition() function may be executed. In addition, for each transaction, the AddApplicants(HASH) function may be executed by inputting the group hash value.

In this case, when the service server 100 transmits the Mth group hash value to the blockchain network 200, the lottery smart contract registered in the blockchain network 200 causes the first group hash value to The accumulated hash value may be updated by applying at least one second hash operation to the accumulated hash value corresponding to the M-1 group hash values and the newly acquired M-th group hash value. M will of course be an integer greater than or equal to 2 and less than or equal to K. Thereafter, each time a new group hash value is acquired, such an update process may be repeated to determine the updated accumulated hash value as the base hash value.

Specifically, the cumulative hash value refers to a hash value that is updated using group hash values to generate a base hash value. For example, when a second group hash value is obtained after a first group hash value is obtained, the lottery smart contract applies a second hash operation to the first group hash value and the second group hash value, thereby first calculating the accumulated hash value. Can be generated. Thereafter, when the third group hash value is obtained, the lottery smart contract updates the accumulated hash value by applying a second hash operation to the accumulated hash value and the third group hash value. The accumulated hash value may be updated by applying the second hash operation to the accumulated hash value reflecting up to the 3 group hash values and the fourth group hash value. In this case, the second hash operation may be at least some of the hash functions such as MD5, SHA, or CRC, similar to the above-described first hash operation. Two hash operations could be used. In addition, as for the "cumulative hash value" used in this step, the cumulative hash value updated in the previous step may be used as it is, but the accumulated hash value modified by a predetermined function may be used. We will simply name everything "cumulative hash value".

Thereafter, when there is no more group hash value to be obtained, the lottery smart contract may determine the finally updated accumulated hash value as the base hash value. At this time, the API's CloseSortition() function can be executed.

In another embodiment, the service server 100 may transmit the group hash values to the blockchain network 200 by generating a transaction after the group hash values are generated for a predetermined number or for a predetermined period. In this case, unlike the previously described embodiment, when the service server 100 sequentially acquires lottery participation requests, generates a group hash value each time the above-described specific number is filled and transmits it to the blockchain network 200 Rather, after obtaining lottery participation requests for a predetermined number or for a predetermined period, all group hash values for the lottery addition requests are generated, and then the group hash values are transmitted to the blockchain network 200 at once. Is assumed. As an example, it may be assumed that after all lottery participation requests are obtained, all group hash values are transmitted to the blockchain network 200 at once.

In this case, it is not necessary to take the configuration of updating the cumulative hash value each time the group hash value is obtained, as described above, and a configuration of generating the base hash value at once using all the obtained group hash values. You can take it. Specifically, the service server 200 may cause the lottery smart contract to generate a tree structure using group hash values, or to generate a base hash value through a hash function similar to the second hash operation. The tree structure could be anything that can generate a hash value, such as a Merkle tree.

When the base hash value is generated according to this method, the service server may cause the lottery smart contract to transmit the base hash value to the service server 200. In this case, the GetBaseHash() function among APIs can be used.

Thereafter, the service server 100 may cause the determination module 140 included therein to determine at least one specific user terminal that has won among the user terminals by referring to the base hash value. This can be performed by referring to a result of listing absolute values of differences between user hash values and base hash values in order of size. Specifically, the service server 100 causes the determination module 140 to refer to the result of listing the above-described absolute values in the order of increasing size, from the first absolute value to the specific absolute value. Select user hash values corresponding to absolute values, but select specific user hash values by selecting the number of selected user hash values to follow a preset ratio to the number of all user hash values. Specific user terminals can be determined by selecting user terminals corresponding to the values. To put it simply, when the user hash values are listed in the order of the smallest difference from the base hash value, the user terminals corresponding to the top N% of them will be determined as specific user terminals.

When certain user terminals, which are the winning terminals, are determined through this method, the users calculate the base hash value by themselves using the user hash values published by the server and the first hash operation and the second hash operation published by the operator. As a result, since the calculated base hash value can be verified, transparency of the lottery process can be improved.

As another embodiment, there is a method of differentiating the lottery pool according to the membership information of users using respective user terminals, and this will be described with reference to FIG. 4.

4 is a flow chart illustrating a method of transparently performing a lottery using a blockchain network according to an embodiment of the present invention, and illustrating a method of differently lottery depending on membership.

Referring to FIG. 4, it can be seen that different numbers of user hash values are grouped in the service server, and that there are several base hash values generated in the blockchain network 200.

Specifically, when user hash values are generated through the same process as in the above-described embodiment, the service server 100 classifies lottery participation requests including membership information of users using user terminals according to membership information. , The hash module 140 may allow the hash module 140 to generate group hash values for each lottery participation request corresponding to a variable pool size according to each information, for lottery participation requests classified to have the same membership information. . In other words, group hash values will be generated only with lottery participation requests having the same membership information. For example, the first group hash value is generated using user hash values corresponding to the A grade lottery participation request, and the second group hash value is generated using user hash values corresponding to the B grade lottery participation request.

Thereafter, the service server 100 may cause the lottery smart contract to generate base hash values for each membership information by referring to group hash values. In addition, the service server 100 may cause the determination module 140 to determine a winning specific user terminal among the user terminals for each membership information by referring to respective base hash values. That is, by creating a base hash value by changing the pool for each membership information, the winning probability is changed. As an example, the pool of user terminals having a membership of a preferential grade may be set to be smaller so that the probability of winning is high. Of course, there may be several ways to change the winning probability for each membership, but if you use this method, it is easy to add membership.

As such a variable pool size is important, functions included in the API are slightly different as can be seen in FIG. 4. For example, unlike the previous embodiment, the AddApplicants(pool, Hash) function receives information about the pool corresponding to the group hash value in addition to the Hash value as input, and uses the corresponding information together with the blockchain network 200. It is set to be able to generate a transaction in In addition, for each base hash, counts information, which is the number corresponding to each membership information, exists on the blockchain network 200, and the GetCount() function, which is a function for obtaining this, is also included in the API.

In this case, a method of generating group hash values, a method of generating base hash values, and a method of determining a specific user terminal in the present embodiment may be the same as or similar to those described in the above-described embodiment.

In the above embodiments, when the group hash values are transmitted to the blockchain network, transactions may occur multiple times. In this case, sequence collation is performed by generating transactions by alternately using a plurality of network addresses corresponding to the blockchain network. You will be able to prevent it.

The lottery method of the present invention has been generally described above, but a modified embodiment of the present invention will be described below.

In the above-described embodiments, a configuration in which the base hash value is generated and then transmitted to the service server 100 so that the determination module 140 determines a specific user terminal using this has been proposed. In this case, when the base hash value is generated, it may be assumed that the base hash value is not transmitted to the service server 100 but is transmitted to another device (not shown).

Specifically, the service server 100 may cause the smart contract to generate a base hash value and then transmit it to another device (not shown). Thereafter, the service server 100 may cause another device (not shown) to determine a specific user terminal by referring to the base hash value. The above-described other device (not shown) may be a device having the same or similar structure as the service server 100, and the method in which the other device (not shown) determines a specific user terminal is, according to the embodiment, It will be the same or similar to the methods using the difference between the base hash value and the user hash values. In order to use the above-described methods, another device (not shown) will obtain user hash values from the service server 100, apart from the process of obtaining the base hash value from the blockchain network 200.

The embodiments according to the present invention described above may be implemented in the form of program instructions that can be executed through various computer components and recorded in a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded in the computer-readable recording medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in the computer software field. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magnetic-optical media such as floptical disks. media), and a hardware device specially configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of the program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform processing according to the present invention, and vice versa.

In the above, the present invention has been described by specific matters such as specific elements and limited embodiments and drawings, but this is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , Anyone with ordinary knowledge in the technical field to which the present invention pertains can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention is limited to the above-described embodiments and should not be defined, and all modifications that are equally or equivalent to the claims as well as the claims to be described later fall within the scope of the spirit of the present invention. I would say.

Claims (18)

In the method of transparently performing a lottery using a blockchain network,
(a) When a plurality of lottery participation requests including a first lottery participation request to an N-th lottery participation request are obtained from user terminals, the service server causes the hash module to generate a first lottery participation request, corresponding to the lottery participation requests. One including a predetermined number of the lottery participation requests by generating a plurality of user hash values including a user hash value to an N-th user hash value, and applying at least one first hash operation to the user hash values Generating one or more group hash values corresponding to each of the above groups and including a first group hash value to a K-th group hash value, and then transmitting the group hash values to a blockchain network;
(b) The service server causes the lottery smart contract registered in the blockchain network to generate at least one base hash value by referring to the transmitted group hash values, and the base hash value is the service server Or allowing it to be delivered to another device; And
(c) The service server causes the determination module included in itself to determine at least one specific user terminal that has won among the user terminals by referring to the base hash value, or causes the other device to: Determining the specific user terminal among the user terminals by referring to the base hash value;
The method comprising a. The method of claim 1,
The step (a),
The service server causes the hash module to apply the first hash operation to user hash values included in each group for each group including a specific number of lottery participation requests corresponding to a preset pool size. And generating the group hash values for each group. The method of claim 1,
The step (a),
The service server is characterized in that the group hash value is transmitted to the blockchain network by generating a transaction each time the group hash value is generated,
The step (b),
When the service server causes the lottery smart contract to generate an Mth group hash value-M is an integer of 1 or more and K or less-is obtained, the accumulated hash value corresponding to the first group hash value to the M-1th group hash values and , The accumulated hash value is updated by applying at least one second hash operation to the newly acquired M-th group hash value, and the updated accumulated hash value is repeated by repeating the same update process each time a new group hash value is obtained. And generating the base hash value by determining a value as the base hash value. The method of claim 1,
The step (a),
The service server is characterized in that the group hash values are generated for a predetermined number or for a predetermined period, and then transmit the group hash values to the blockchain network by generating a transaction,
The step (b),
Wherein the service server causes the lottery smart contract to generate the base hash value by generating a tree structure using the group hash values. The method of claim 1,
The step (a),
The lottery participation requests include membership information of users using the user terminals, and the service server classifies the lottery participation requests according to the membership information, and then causes the hash module to have the same membership information. And generating the group hash values for each of the number of lottery participation requests corresponding to a variable pool size according to each membership information. The method of claim 5,
The step (b),
The service server causes the lottery smart contract to generate each of the base hash values for each of the membership information, with reference to the group hash values,
The step (c),
The service server causes the determination module to determine a winning specific user terminal among the user terminals for each of the membership information, with reference to each of the base hash values, or to the other device, respectively And determining the specific user terminal for each of the membership information by referring to the base hash values of. The method of claim 1,
The step (a),
When the service server transmits the group hash values to the blockchain network, the sequence collation is prevented by alternately using a plurality of network addresses corresponding to the blockchain network. The method of claim 1,
The step (c),
Wherein the service server causes the determination module or the other device to determine the specific user terminals with reference to a result of listing absolute values of differences between the user hash values and the base hash value in order of size How to do it. The method of claim 8,
The step (c),
The service server causes the determination module or the other device to correspond to the absolute values from the first absolute value to a specific absolute value with reference to the result of listing the absolute values in the order of increasing size. Select user hash values, but select specific user hash values by selecting the ratio of the number of the selected user hash values to the number of total user hash values according to a preset ratio, and corresponding to the specific user hash values And determining the specific user terminals by selecting the user terminals. In a service server that transparently performs lottery using a blockchain network,
One or more memories for storing instructions; And
Including one or more processes configured to perform the instructions,
The processor, when (I) a plurality of lottery participation requests including a first lottery participation request to an N-th lottery participation request are obtained from user terminals, the hash module causes a first lottery participation request, corresponding to the lottery participation requests. One including a predetermined number of the lottery participation requests by generating a plurality of user hash values including a user hash value to an N-th user hash value, and applying at least one first hash operation to the user hash values Generating one or more group hash values corresponding to each of the groups and including a first group hash value to a K-th group hash value, and then transmitting the group hash values to a blockchain network; (II) Have the lottery smart contract registered in the blockchain network generate at least one base hash value by referring to the transmitted group hash values, and transmit the base hash value to the service server or other device The process of making it happen; And (III) causing a determination module included in the service server to determine at least one specific user terminal that has been won among the user terminals by referring to the base hash value, or to cause the other device to determine the base hash value. A process of determining the specific user terminal among the user terminals with reference to a value;
Service server, characterized in that to perform. The method of claim 10,
The (I) process,
The processor causes the hash module to apply the first hash operation to user hash values included in each group, for each group including a specific number of lottery participation requests corresponding to a preset pool size. And generating the group hash values for each of the groups. The method of claim 10,
The (I) process,
The processor, by generating a transaction every time the group hash value is generated, characterized in that the group hash value is transmitted to the blockchain network,
The (II) process,
When the processor causes the lottery smart contract to obtain an Mth group hash value-M is an integer of 1 or more and K or less-is obtained, an accumulated hash value corresponding to the first group hash value to the M-1th group hash values, The accumulated hash value is updated by applying at least one second hash operation to the newly acquired M-th group hash value, and the updated hash value is updated by repeating such an update process each time a new group hash value is obtained. And generating the base hash value by determining as the base hash value. The method of claim 10,
The (I) process,
The processor, by generating a transaction after the group hash values are generated for a predetermined number or for a predetermined period, to transmit the group hash values to the blockchain network,
The (II) process,
The service server, wherein the processor causes the lottery smart contract to generate the base hash value by generating a tree structure using the group hash values. The method of claim 10,
The (I) process,
The lottery participation requests include membership information of users using the user terminals, and the processor classifies the lottery participation requests according to the membership information, and then causes the hash module to have the same membership information. For the classified lottery participation requests, the group hash values are generated according to the number of lottery participation requests corresponding to a variable pool size according to each membership information. The method of claim 14,
The (II) process,
The processor causes the lottery smart contract to generate each of the base hash values for each of the membership information, with reference to the group hash values,
The (III) process,
The processor causes the determination module to determine a winning specific user terminal among the user terminals for each of the membership information, with reference to each of the base hash values, or to cause the other device to And determining the specific user terminal for each of the membership information by referring to the base hash values. The method of claim 10,
The (I) process,
When the processor transmits the group hash values to the blockchain network, a plurality of network addresses corresponding to the blockchain network are alternately used to prevent sequence collation. The method of claim 10,
The (III) process,
Wherein the processor causes the determination module or the other device to determine the specific user terminals with reference to a result of listing absolute values of differences between the user hash values and the base hash value in order of size Service server. The method of claim 17,
The (III) process,
The processor causes the determination module or the other device to refer to a result of listing the absolute values in the order of increasing size, and the user corresponding to the absolute values from the first absolute value to a specific absolute value in the result Select hash values, but select specific user hash values by selecting a ratio of the number of the selected user hash values to the number of total user hash values according to a preset ratio, and corresponding to the specific user hash values. A service server for determining the specific user terminals by selecting user terminals.

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