KR102389922B1 - Cryptocurrency payment gateway and its payment method - Google Patents

Abstract

The present invention relates to a cryptocurrency payment gateway and a payment method thereof, which allows a user to pay not only in fiat money, but also in the type of cryptocurrency desired by the user when the user transacts goods and services with a seller, wherein the user does not need to disclose the identity and other information because it is managed using a decentralized distributed ID, and the problem of payment delay can be solved when the cryptocurrency payment is performed. According to the present invention, transaction convenience for users and sellers can be promoted because it supports the payment using not only fiat money, but also multiple cryptocurrencies. In addition, since a decentralized distributed ID (DID) is issued and identity verification is performed using the DID, there is no need to disclose identity and other information, and The users can implement self-identification in a self-sovereign manner. In addition, the seller receives 99% of the price excluding 1% CPG fee through the cryptocurrency payment gateway of the present invention, so it can be used at a much lower fee than the existing PG fee of 4.5%. In addition, users can purchase utility tokens and use the utility tokens by storing the utility tokens in the cryptocurrency wallets, thereby solving the problem of payment delays due to confirmation procedures when paying or exchanging money with cryptocurrency.

Description

Cryptocurrency payment gateway and payment method thereof

The present invention relates to a cryptocurrency payment gateway and a payment method thereof, and more particularly, enables a user to pay with fiat currency or cryptocurrency for a service provided by a seller, and enables rapid payment without delay in payment, It relates to a cryptocurrency payment gateway that can prove user identity using a distributed ID and a payment method therefor.

With the recent development of digital technology, the concept of a new currency such as virtual currency has emerged. Unlike fiat currencies (coins, banknotes) that are actually traded, these virtual currencies literally mean money that has no substance in the virtual environment.

Recently, cryptographic currency (hereinafter, abbreviated as 'cryptocurrency') represented by 'bitcoin' among virtual currencies has been developed and distributed.

Cryptocurrency operates on a peer-to-peer (P2P) basis, and when a transaction is completed, a new block serving as a ledger is created and connected to the existing block. In addition, a timestamp is recorded for each new block, and the time stamp becomes information proving the time at which a transaction occurred.

In addition to the representative 'Bitcoin', cryptocurrencies that are relatively actively traded include 'Ethereum', 'Ripple', 'Dash', and 'Litecoin'. These cryptocurrency transactions are being conducted in major cryptocurrency exchanges such as 'Upbit', 'Bithumb', 'Korbit', and 'Coinone' in Korea.

The cryptocurrency exchange consists of a system that purchases the desired cryptocurrency by depositing an amount corresponding to the user's own virtual account, and allows the cryptocurrency to be stored in an electronic wallet and traded.

Currently, in addition to the above major cryptocurrency exchanges, a large number of cryptocurrency exchanges are in operation, and even though they are the same type of cryptocurrency, several cryptocurrency exchanges form different prices. There is a cumbersome problem to manage the cryptocurrency that you have.

In addition, if the member information for authentication is different for each cryptocurrency exchange, it is difficult to remember the member information for all cryptocurrency exchanges, and there is a problem that users cannot buy and sell transactions quickly in real-time changing market prices. .

In particular, in the process of using cryptocurrency for payment or currency exchange, a confirmation procedure must be performed, and only when such a confirmation procedure is performed, payment or exchange through cryptocurrency can be finally completed. However, it may take some time for the confirmation procedure performed in the process of using cryptocurrency for payment or currency exchange to be processed, which makes it difficult for users to use cryptocurrency in real time.

Republic of Korea Patent Registration 10-2033244 Republic of Korea Patent Registration 10-2099556 Republic of Korea Patent Registration 10-2088841 Republic of Korea Patent Registration 10-2193988 Republic of Korea Patent Publication 10-2019-0092967

The present invention was invented to improve the above problems, and when a user transacts goods and services with a seller, it enables payment with not only fiat currency but also any type of cryptocurrency desired by the user, and provides a decentralized distributed ID. The purpose of this is to provide a cryptocurrency payment gateway and its payment method that can solve the problem of payment delay when paying with cryptocurrency, without the need for users to disclose their identity and other information because they are managed by using it.

In addition, when a user exchanges cryptocurrency for fiat currency, it automatically matches the exchange with the highest predicted price of the cryptocurrency among a plurality of exchanges to enable the trading of cryptocurrency by providing a cryptocurrency payment gateway and its payment method. it is for

In order to achieve the above object, the cryptocurrency payment gateway according to the present invention provides an instance of a payment application to a user device, receives information related to a transaction from a seller with which the user makes a transaction, and is used to process the transaction. a payment processing unit that authenticates a payment method, communicates with a cryptocurrency network to process payment with cryptocurrency, and communicates with a fiat currency network to process payment with fiat currency; and a DID management unit that issues and verifies decentralized IDs of sellers and users, and manages a seller profile that provides goods or services and a user profile that purchases goods or services provided by the seller. .

The payment processing unit includes a token generation unit that generates a utility token in a public block chain; and a token controller/swapper that manages the utility token generated by the token generator in the database and provides a utility token to the user when making a payment using cryptocurrency or fiat currency. It is used in a wallet, and fiat currency payment utility tokens are swapped at a 1:1 ratio, and the payment processing unit manages the user's utility token purchase history and utility token payment history in the database. do it with

The payment processing unit confirms the conversion value related to cryptocurrency or fiat currency, matches the conversion value with the user's available utility tokens managed in the database by the controller/swapper, and performs a transaction when the order processing engine processes the order an order matching engine that prepares to minimize the waiting time of and an order processing engine that triggers a token transaction when receiving a readiness signal from the order matching engine, and updates the transaction details in a database when receiving token transaction confirmation from the block chain.

The fiat currency and utility token swap price is calculated using an external API for the current timestamp.

The DID management unit may include: a seller profile unit including the seller's cryptocurrency wallet and fiat currency ledger; a user profile unit including the user's cryptocurrency wallet and fiat currency ledger; Issuers who issue IDs of merchants and users; and a verifier that verifies the IDs of the seller and the user.

The payment processing unit includes an automatic fiat currency conversion unit that automatically deposits cryptocurrency into the fiat currency ledger in order to reduce the cryptocurrency ledger whenever the balance of the cryptocurrency wallet of the seller and the user rises above a preset level. characterized.

It further comprises an exchange rate calculator for calculating the exchange rate between cryptocurrency and fiat currency, wherein the fiat currency automatic conversion unit sells cryptocurrency when the exchange rate is favorable according to the calculation result of the exchange rate calculator and deposits the cryptocurrency into the fiat currency ledger. do it with

When a user wants to exchange cryptocurrency for fiat currency, it predicts the future price of the cryptocurrency using a time-series-based machine learning algorithm, and checks the exchange and service fees provided by various exchange platforms available. It characterized by further comprising; a cryptocurrency price prediction unit that calculates by adding the exchange and service fees to the predicted cryptocurrency price of each exchange.

When a user exchanges cryptocurrency for fiat currency, an exchange automatic linkage unit that automatically matches the exchange with the highest price calculated and predicted by the cryptocurrency price prediction unit among a plurality of exchanges to conduct cryptocurrency trading; further includes; characterized in that

Collect a plurality of feature data representing a cryptocurrency, collect price data of the corresponding cryptocurrency at regular time intervals, and generate a time series data set having a different number of data points to predict the price change at time t, , A cryptocurrency prediction modeling generator that generates a linear model corresponding to each time series data set by applying each time series data set to a machine learning algorithm, and uses this to predict price changes at time t; The cryptocurrency price prediction unit predicts the cryptocurrency price of each exchange by using the linear model generated by the cryptocurrency prediction modeling generation unit.

Meanwhile, in order to achieve the above object, a payment method using a cryptocurrency payment gateway according to the present invention includes issuing a decentralized distributed ID to a seller and a user; receiving transaction-related information from a merchant with whom the user transacts, and authenticating a payment method used to process the transaction; generating a utility token on a public blockchain; managing a utility token in a database and providing a utility token to a user when making a payment using cryptocurrency or fiat currency; managing, in a database, a user's purchase of a utility token and a payment using the utility token; And when a user wants to exchange cryptocurrency for fiat currency, the price of cryptocurrency is predicted using a time series-based machine learning algorithm, and the exchange with the highest predicted price among a plurality of exchanges is automatically matched to buy and sell cryptocurrency It is characterized in that it includes;

The step of managing the payment details using the utility token in the database includes confirming the conversion value related to cryptocurrency or fiat currency, matching the conversion value with the user's available utility token managed in the database, and processing the order preparing for; and triggering a token transaction when preparation for order processing is completed, and updating the transaction details in a database upon receipt of a token transaction confirmation from the block chain.

Each time the balance of the cryptocurrency wallet of the seller and the user rises above a preset level, the method further comprises automatically depositing cryptocurrency into the fiat currency ledger in order to reduce the cryptocurrency ledger.

In the step of depositing the fiat currency ledger, when the exchange rate is favorable according to the calculation result of the exchange rate, the cryptocurrency is sold and the deposit is made to the fiat currency ledger.

The step of automatically trading the cryptocurrency includes collecting a plurality of feature data representing the cryptocurrency, collecting the price data of the cryptocurrency at regular time intervals, and predicting the price change at time t. Create a time series data set with a different number of data points, apply each time series data set to a machine learning algorithm to generate a linear model corresponding to each time series data set, and use the generated linear model to generate each exchange at time t It is characterized by predicting the cryptocurrency price of

According to the present invention, since the cryptocurrency payment gateway supports payment using a plurality of cryptocurrencies as well as fiat currency, it is possible to promote transaction convenience for users and sellers.

In addition, since a decentralized decentralized ID (DID) is issued and identity verification is performed using it, there is no need to disclose identity and other information, and users can implement identity verification in a self-sovereign way.

In addition, the seller receives 99% of the price excluding 1% of the CPG fee through the cryptocurrency payment gateway of the present invention, so it can be used at a much lower fee compared to the existing 4.5% of the PG fee.

In addition, users can put utility tokens in their cryptocurrency wallets after purchase and use them, thereby solving the problem of delays in payment due to the confirmation process when making payments or exchanges using cryptocurrency.

Furthermore, using a time series-based machine learning algorithm for the cryptocurrency the user wants to exchange, predicts different cryptocurrency prices in multiple exchanges and automatically matches the route so that the sale is made through the exchange with the highest predicted price. By doing so, the difference between the asking price at the time of payment and the time of conversion can be minimized, and the profit of users and sellers can be maximized because it is a method that predicts variability, not just a method based on an exchange with a high asking price at the time of payment.

By using the cryptocurrency payment gateway of the present invention, users and sellers can use this service as a payment method in real life even without deep knowledge of cryptocurrency.

1 is an exemplary diagram including a seller providing a service to a user using a cryptocurrency payment gateway according to the present invention
2 is an exemplary diagram illustrating a case in which a call is transmitted from one user to another using the cryptocurrency payment gateway according to the present invention;
3 is a system structure diagram of a cryptocurrency payment gateway that uses a block chain to record the contents of a transaction and a user pays with cryptocurrency
4 is a conceptual diagram of a payment processing service that allows users to pay with fiat currency, bitcoin, ethereum or other coins
5 is a conceptual diagram of a matching algorithm used for fast payment processing of cryptocurrency
6 is a conceptual diagram of a token controller and a swapper for buying and selling utility tokens
7 is a flowchart of the Bitcoin price prediction algorithm.
8 is a functional block diagram of a cryptocurrency payment gateway according to the present invention.
9 is a flowchart of a payment method using a cryptocurrency payment gateway according to the present invention

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms.

In the present specification, the present embodiment is provided so that the disclosure of the present invention is complete, and to completely inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention.

And the invention is only defined by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been specifically described to avoid obscuring the present invention.

In addition, the same reference numerals refer to the same elements throughout the specification, and the terms used (referred to) in this specification are for the purpose of describing the embodiments, and are not intended to limit the present invention.

In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase, and elements and operations referred to as 'comprising (or having)' do not exclude the presence or addition of one or more other elements and operations. .

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs.

In addition, terms defined in a commonly used dictionary are not ideally or excessively interpreted unless they are defined.

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

Referring to FIG. 1 , an example including a seller 112 providing goods/services to a user 102 is illustrated. It also shows the cryptocurrency payment gateway 100 of the present invention connected to the seller's POS device 116 and the user device 102 via the network 111 .

The user 102 performs a transaction with fiat currency or cryptocurrency for the service provided by the seller 112 . For example, vendor 112 may provide electrical charging to the vehicle. User 102 may pay in any available currency, fiat currency or cryptocurrency.

Merchant 112 may use POS 116 device to accept payment from user 102 . POS 116 includes mobile or other devices capable of running merchant applications.

During a transaction, the POS 116 may determine transaction information such as an identifier of a payment method, a payment amount received from a user, and a processing time and date. The payment networks 105 and 106 are connected to the payment method, the issuing bank of the payment method for fiat currency, and the user's verifiable credentials.

The transaction information is transmitted to the cryptocurrency payment gateway 100 through the network 111 . The network 111 is implemented as wired or wireless.

When the seller 112 receives payment information from the user 102, the seller 112 sends an authorization request together with information related to the transaction to the cryptocurrency payment gateway 100 as shown in FIG.

The cryptocurrency payment gateway 100 includes a DID management unit 108 for issuing and verifying a payment processing unit 107 and a distributed identity, and managing a seller profile 109 and a user profile 110 . Here, DID stands for Decentralized Identity Management.

The payment processing unit 107 receives transaction-related information from the POS 116 and performs a function of authenticating a payment method used to process the transaction. The payment processing unit 107 transmits an indication indicating whether the payment method has been approved or rejected to the POS 116 .

2 and 4 , in a transaction related to cryptocurrency 302 , 303 , and 304 , the payment processing unit 107 may communicate with the cryptocurrency network 106 through the network 111 . Such networks include, for example, the Bitcoin network 317 (see FIG. 4), the Ethereum network 318 (see FIG. 4), and the like. Cryptocurrency network 106 refers to a network that cryptographically confirms, verifies transactions, and records transactions in a copy of a distributed ledger called a blockchain.

Once the transaction is verified, the cryptocurrency network 106 approves the transaction by recording the transaction in the blockchain 317 , 318 .

The seller profile 109 includes details of the seller 112 as well as the items 113 (eg, electric vehicle charging) provided by the seller 112 , the business type of the seller 112 (eg, gas charging stations, etc.), and store information related to the geographic location of the seller 112 .

In some cases, the computing device associated with the vendor 112 verifies that the user 102 has actually visited the building and the presence of the digital device used by the vendor 112 . This is done via NFC.

As another example, the POS 116 and the user devices 103 and 104 share their respective locations by sharing GPS coordinates. When the user 102 visits the seller through a website, for example, the user 102 logs in through his or her DID or receives a cookie (eg, JWE token) from the seller confirming that the user is at the place. use.

The user 102 receives an instance of a payment application, such as a mobile wallet application, from the payment processing unit 107 . The payment processing unit 107 provides an instance of the application to the user's device. The payment processing unit 107 matches the identifier of the application instance to the user profile 110 .

The DID management unit 108 may store the user profile 110 , and user identification information, payment related partial transaction records, linked account related information, and service related information used in the user profile (eg, the payment processing unit 107 ) ) and account information using the mobile wallet application provided by The issuer 114 and the verifier 115 of the DID management unit 108 are responsible for issuing and verifying the IDs of the seller 112 and the user 102 .

Referring to FIG. 2 , a currency may be transmitted from any party, such as a seller, a user, or a bank, to another party using the same cryptocurrency payment gateway 100 . The overall function of the system is similar to FIG. 1 .

The configuration of the cryptocurrency payment gateway of the present invention will be described in detail with reference to FIG. 8 .

The cryptocurrency payment gateway 100 includes a payment processing unit 107 and a DID management unit 108, a cryptocurrency price prediction unit 325, an exchange automatic linkage unit 326, and a cryptocurrency prediction modeling generation unit 327. may include more.

The payment processing unit 107 includes a token generation unit 322 , a token controller / swapper 321 , an order matching engine 319 , an order processing engine 320 , an automatic fiat currency conversion unit 323 , and an exchange rate calculator 324 . ) is included.

The payment processing unit 107 provides an instance of the payment application to the user device, receives information related to the transaction from the seller 112 with which the user 102 transacts, authenticates the payment method used to process the transaction, and password It communicates with the currency network 106 to process payment with cryptocurrency, and communicates with the fiat currency network 105 to process payment with fiat currency.

The DID management unit 108 issues and verifies the decentralized ID (Decentralized Identity) of the seller 112 and the user 102, the seller profile 109 that provides the product or service 113, and the seller Manages the user profile 110 that purchases goods or services.

The cryptocurrency payment gateway 100 may further include a permissioned blockchain for the payment processing unit 107 to record and verify cryptocurrency transactions. The payment processing unit 107 transmits transactions in the permission-type block chain to the public block chain.

The payment processing unit 107 includes a token generation unit 322 and a token controller/swapper 321 .

The token generator 322 generates a utility token in the public blockchain. Utility token refers to 'cryptocurrency issued by a specific blockchain platform to prove the value of blockchain technology'. The feature is that it can be used as a currency substitute in projects promoted on the blockchain platform or in Dapps (decentralized applications). For example, in order to properly enjoy the game-type DApp 'CryptoKitties' on the Ethereum platform, you need Ether (ETH), a cryptocurrency issued by the Ethereum platform. Therefore, Ether can be said to be a utility token for the Ethereum platform. In fact, almost all cryptocurrencies belong to utility tokens.

Utility tokens are perhaps the most common token type today. Unlike stablecoins and security tokens, utility tokens are not guaranteed of value by anything. If asset-based tokens are like airline stocks, utility tokens have specific functions, such as mileage service, but have no external value. Utility tokens can be used for in-game currency, fuel for decentralized applications, loyalty points, etc.

The token controller/swapper 321 manages the utility token generated by the token generator 322 in the database 313, and provides the utility token to the user when making a payment using cryptocurrency or fiat currency.

The user purchases a utility token, puts it in the user's cryptocurrency wallet, and uses it, the fiat currency payment utility token is swapped at a 1:1 ratio, and the payment processing unit 107 provides the utility token purchase history and utility token by the user. The database 313 manages the payment details using the token.

The payment processing unit 107 includes an order matching engine 319 and an order processing engine 320 .

The order matching engine 319 checks the conversion value related to cryptocurrency or fiat currency, and matches the conversion value with the user's available utility tokens managed by the controller / swapper 321 in the database 313, When the order processing engine 320 processes the order, it prepares to minimize the waiting time of the transaction.

The order processing engine 320 triggers a token transaction upon receiving a readiness signal from the order matching engine 319 , and updates the transaction details in the database 313 upon receiving a token transaction confirmation from the block chain.

Referring to FIG. 5 , it shows a method of obtaining a payment confirmation in a very short time. It depends on the matching algorithm. The matching algorithm of the present invention has two components. The two components are the order matching engine 319 and the order processing engine 320 discussed above. The functions of the two components are described in detail below.

● Order Matching Engine(319) :

Trigger Confirmation check Cron: An automatic cron is triggered to check a Bitcoin or other cryptographic confirmation for transaction confirmation.

Match the Input and Fulfillment Order: Provides conversion rates and outputs for price, available tokens, price and trade.

Check the Price and Conversion Values: Check the conversion value related to fiat currency and match the conversion value with the tokens available in the database.

Prepare Fulfillment Order: When an order is triggered, the order fulfillment process starts preparing after confirmation to minimize the waiting time of the transaction.

● Order Fulfillment Engine (320):

The order fulfillment process starts immediately after receiving the cryptocurrency transaction initialization flag. Check the conversion price in fiat currency. Trigger token transaction after confirmation from crypto cron. The next step is to get the token transaction confirmation from the blockchain. An item in the database is updated.

Fiat and utility token swap prices are calculated using an external API against the current timestamp. Referring to FIG. 4 , the latest market price of a coin in USD can be obtained and used from an external Coin Market Price API.

Referring to FIG. 6 , a method of buying and selling an internally generated utility token will be described.

Token payments:

1. Tokens are used for real-time payments in POS.

2. Users must purchase tokens through cryptocurrency or fiat currency in advance of the service to save time.

3. Token trading is fee-free and fast.

4. The speed may take from 0.5 seconds to 1 minute depending on the congestion on the network.

5. Tokens are completely decentralized and private, so you can manage them for free.

6. The user does not need to operate or manage an additional wallet other than the service wallet of the present invention. This single wallet can be used to achieve fast and decentralized payments with full decentralization.

7. As it is a self-managed network, third-party dependencies are not included.

8. Token receipt is generated within 1 second after token transaction confirmation. Users can get proof of transaction to receive full service.

Referring to FIG. 8 , the DID management unit 108 includes a seller profile unit 109 , a user profile unit 110 , an issuer 114 , and a verifier 115 .

Referring to FIG. 3 , the seller profile unit 109 includes the seller's cryptocurrency wallet 201 , a transaction log 202 , and a fiat currency ledger 203 .

The user profile unit 110 includes user data 204 , a cryptocurrency wallet 205 , a transaction log 206 , and a fiat currency ledger 207 .

The issuer 114 issues an ID so that the seller and the user can access the cryptocurrency payment gateway 100 and use the service of the present invention, and the verifier 115 allows the seller and the user to access the cryptocurrency payment gateway 100 Each time a connection is made, the distributed ID is verified.

Referring to FIG. 3 , in addition to user data, the user profile 110 may include a ledger for all accounts managed by the payment service. For example, the user profile includes the user's cryptocurrency wallet 205 and the user's fiat ledger 207 . The user's cryptocurrency wallet 205 and the user's fiat currency ledger 207 indicate that the user uses the payment processing unit 107 to manage accounts for cryptocurrency and fiat money.

It can be seen that the ledger is expressed as a logical ledger. Actual data may be presented in a single database 313 (see FIG. 4 ). That is, the transaction record 202, fiat ledger 203, user data 204, transaction record 206, and fiat ledger 207 represent a logical ledger, with the actual data to be stored in a single database 313. can

When the cryptocurrency is transmitted to the payment processing unit 107, its value is accumulated as a balance in the cryptocurrency ledger.

The transaction is sent to the miner to add the transaction to the block and verify the integrity of the transaction. When the miner verifies the block, the block is recorded on the public blockchain, and the payment processing unit 107 can verify that the transaction is approved, and stores the transmitted amount in the customer's cryptocurrency ledger.

The user may have an account managed by the payment processing unit 107 for fiat money. The account is accumulated by receiving money from a bank account 212 in an external bank. The transferred money is reflected in the fiat ledger.

The payment processing unit 107 includes a permissioned blockchain 210 to record and verify cryptocurrency transactions. The permissioned blockchain 210 records the sender's address, public key, and the value of the transmitted cryptocurrency, and is used to verify the ownership of the cryptocurrency token to be transmitted.

The payment processing unit 107 may record transactions occurring in the payment processing unit including cryptocurrency until the number of transactions exceeds the determined limit. When the limit is reached, the payment processing unit 107 may initiate transactions in the permissioned blockchain 210 to the public blockchains 317 and 318, and miners verify the transaction and perform the transactions in the public blockchains 317 and 318. ) can record transactions in blocks in

Referring to FIG. 4 , the user 102 can pay with fiat currency 301 , Bitcoin 302 , Ether 303 , or another coin 304 . The payment processing unit 107 provides each API (305, 306, 307) to the user when the user is authenticated through the decentralized identity verification unit 115 to access the function of the cryptocurrency payment gateway 100. The main functions of the payment processing unit 107 are described below.

● Crypto integration

User 102 can create an address and send cryptocurrencies 302 , 303 , 304 . The payment processing unit 107 waits until the receiving cron (308, 309) is started and the payment is confirmed. Users can use cryptocurrency wallets for transactions. Currency prices are calculated via Coin Market Cap API 311 for the latest price updates. Coin prices can be stored in USD or US Dollars ($). The payment processing unit 107 may manage the coin price in the database 313 or may generate a utility token in the public block chain 312 . Users can put these tokens in their wallets and use them for quick payment services.

When the receiving API (305, 306, 307) receives the payment, it generates an event for service dispatch and successful payment status in the database (313). Encryption is integrated through APIs provided by supported coins.

● Fiat payment gateway

The user 102 can transfer an amount corresponding to the service price, and can use the hassle-free payment service quickly and without interruption. You can also purchase utility tokens and use them for faster and more decentralized payments. Fiat payment utility tokens may have a 1:1 ratio, and are maintained in database 313 . Once the payment is confirmed, the system cannot automatically undo it. The user can select from fiat currency 301 and cryptocurrency payment options 302, 303, and 304.

● Receiving and payment status

The automated cron (308, 309) is started when the user initiates a payment. Addresses are captured and tracked for payment receipt and status management. Fiat receipts are governed by the fiat payment gateway 105 token response. Receipts will be tracked for up to two hours after payment, after which the address will be invalidated.

The user mapping address is stored in association with the user ID stored in the DID 108 and database 314 . And it is used to map other cryptographic and payment addresses 315 to other similar ones. This may further map to the services 316 available to the user.

For fiat payments we can use a separate database 203 to get the response from the cryptocurrency payment gateway 100, which is captured based on the payment gateway session and authentication token.

● Global utility tokens integration

BTC, ETH, and other cryptocurrency payments (302, 303, 304) can take anywhere from a few minutes to several hours, depending on the blockchain's ability to verify blocks.

Therefore, to overcome payment delays and payment failure issues, we will use utility tokens that will be generated in a fast transaction confirmation that verifies the blockchain 312 to allow payments to be completed in a faster and prepaid manner. To make the system transparent and globally accepted, we will use a public blockchain 312 to generate utility tokens. Such a system will give users transparency and reliable system development.

This token will have a price of 1:1 in terms of USD or other proposed fiat.

These tokens are created on the blockchain by system administrators, the supply is fixed with system limitations in mind, and the unlimited supply of tokens creates an imbalance in the price and payment system.

● Blockchain node integration

Blockchain nodes 317 and 318 are required to invoke payment and receiving methods. We can run our own blockchain nodes that will use our infrastructure or servers. Get all the blocks and access the service through the node daemon. Some nodes are open for connection. For example, Tron, Ethereum and stellar.

● Database structure

Database schema 313 is designed based on DID 108 and user address mapping to manage synchronization between service and payment. Payment status, amount, address and other transaction information are stored in a database for further analysis and event. Users can fetch any data through the API depending on the application process. This data is dumped into the permissioned blockchain node 210 based on the best compatibility for the solution. Users can get the exact event of the data.

● User management

User management is performed with DID 108 and user ID. This user ID is mapped to multiple accounts and transactions 317 for the user. This DID maps all services 318 related to cryptocurrency, such as purchasing, selling and subscribing to the service. Users will receive a unique address for each cryptocurrency they wish to pay for.

● Transaction management and recording

Fiat currency 301 and cryptocurrency 302, 303, 304 transactions are managed based on service and payment providers. Cryptocurrency payment transactions are directly managed by each blockchain 317, 318. In some cases, third party services are used. Transaction fulfillment and amount verification are performed at every stage, and apart from these fees and other costs, they can be calculated in the API prior to transaction creation. Transactions are managed sequentially according to time and transaction completion, eliminating the possibility of re-entry and omission of each transaction.

● Service fulfillment and acknowledgment

The service fulfillment status is manually updated by the administrator in the app. Based thereon, the items are equally managed in the database 313 . Blockchain and payment gateway authorization is provided by the API with a unique transaction ID for every transaction. Service mapping is done on the application side, and the payment gateway only provides payment and request status.

● Checks and security

Payment gateways are secured with standard encryption. Payment management goes through multiple checks from different payment API sources to confirm payment, and updates multiple databases based on key mapping.

● Supported currencies and swapper

The token controller/swapper 321 only provides utility tokens for cryptocurrencies. Dynamic addresses are generated based on coins and users use them to make payments within a given timestamp. The swap price is calculated using a third-party API 311 for the current timestamp. Fees may apply depending on the standards and transaction costs of the blockchain.

● Efficient and fast service development

Services are developed using the jenkin/CI-CD pipeline, and are developed using a balanced approach for high fault tolerance and execution. Supports backup service for backup and recovery in case of any loss or delay.

The settlement processing unit 107 includes a fiat currency automatic conversion unit 323 and an exchange rate calculation unit 324 .

The fiat currency automatic conversion unit 323 automatically deposits cryptocurrency into the fiat currency ledger in order to reduce the cryptocurrency ledger whenever the balance of the cryptocurrency wallet of the seller and the user rises above a preset level. Above the preset level refers to a case in which the cryptocurrency and fiat money balances of the seller and the user are compared and the cryptocurrency to fiat currency rises by a certain ratio or more, or the balance of the cryptocurrency wallet rises to a certain amount or more.

The exchange rate calculator 324 calculates an exchange rate between cryptocurrency and fiat currency. The fiat currency automatic conversion unit 323 may sell cryptocurrency and deposit it into the fiat currency ledger when the exchange rate is favorable according to the calculation result of the exchange rate calculator 324 . That is, even if the balance of the cryptocurrency wallet of the seller and the user rises above a preset level, when the exchange rate is not good, the user can wait without automatically converting to fiat currency.

In addition, when the exchange rate is good, when the cryptocurrency is sold and automatically converted to fiat currency, better service is provided to sellers and users by processing using the cryptocurrency price prediction unit 325 and the exchange automatic linkage unit 326 described below. can provide

The cryptocurrency price prediction unit 325 predicts the future price of the cryptocurrency using a time-series-based machine learning algorithm when the user wants to exchange cryptocurrency for fiat money, and several available exchange platforms ( For example, check the exchange and service fees provided by Upbit, Bithumb, Korbit, Coinone, etc.) and calculate by adding the exchange and service fees to the predicted price of each exchange.

The exchange automatic linkage unit 326 predicts the cryptocurrency price prediction unit 325 among a plurality of exchanges (eg, Upbit, Bithumb, Korbit, Coinone, etc.) when the user exchanges cryptocurrency for fiat currency. Thus, the exchange with the highest calculated price is automatically matched to enable cryptocurrency trading.

Cryptocurrency prediction modeling generating unit 327 collects a plurality of feature data representing cryptocurrency, collects price data of the corresponding cryptocurrency at regular time intervals, and predicts price changes at time t. A time series data set with data points is generated, each time series data set is applied to a machine learning algorithm to generate a linear model corresponding to each time series data set, and the price change at time t is predicted using this.

The cryptocurrency price prediction unit 325 predicts the cryptocurrency price of each exchange using the linear model generated by the cryptocurrency prediction modeling generation unit 327 .

Referring to FIG. 7 , the cryptocurrency price prediction unit 325 shows a process of predicting the price of cryptocurrency. This is applicable not only to Bitcoin, but also to Ethereum and other altcoins. However, below, Bitcoin is used as an example.

To predict the price of Bitcoin, we use three different binary classification algorithms (binomial logistics regression, support vector machine, and random forest algorithms) on daily Bitcoin data. For a long period, it is preferable to use a long short term memory algorithm.

Data Collection:

● First set: Collect price data (daily data) at the end of the day.

We use the 16 Feature Selections mentioned below for the Bitcoin/Ether market.

● Use the Coincap Market API for this data.

● Second set: Use a data set of Bitcoin prices taken at 10-second and 10-minute intervals. The Coinbase API is available for 10-minute price data collection. The 10-second price data can be captured over several weeks by building a web scraper pulled from the Coinbase API.

● About 120,000 unique price points can be obtained by the real-time data collection method as described above.

Feature Selection:

● Some features can be selected from the list for data preprocessing to improve model performance.

1. Average confirmation time: Average time for accepting transactions within a block

2. Block size: Average block size (MB)

3. Cost per transaction ratio: miner’s revenue divided by the number of transactions

4. Difficulty: A measure of how difficult it is to find a new block.

5. Estimated volume: total output that does not change with value

6. Hash rate: Giga hashes per second on the Bitcoin network

7. Market Cap: Number of Bitcoins in Circulation × Market Price

8. Miner revenue: (number of BTC mined/day × market price) + transaction fee

9. Number of Orphaned Blocks

10. Number of TXNs per block: Average number of transactions per block

11. Number of TXNs: Total number of unique Bitcoin transactions per day

12. Number of Unique Addresses: Number of unique Bitcoin addresses used per day

13. Total Bitcoin:. Total number of bitcoins mined in the past

14. Total TXN Fees: BTC value of transaction fees earned by miners per day

15. Trading volume: USD trading volume on top exchanges

16. Trade to Trade Ratio: Relationship between BTC Volume and USD

● A binary classification algorithm can be developed using the above features. Based on the daily data provided, the algorithm predicts changes in the price of Bitcoin as rising or falling.

● An algorithm with a data set based on 16 features can be applied to freely available past 3 years of Bitcoin data.

● To predict a price change signal in Bitcoin data, we look at the amount of change in each of these variables instead of looking at the actual price. You can choose a binomial expression over regression.

● The training data set is performed with the first 75% of the data, and the remaining 25% of the data is used for testing and validation.

Time Series Equations:

For 10-second interval data:

● A 10-second interval is preferable as it can capture small changes in the Bitcoin price.

Time series data sets can be constructed for 30, 60 and 120 minutes. 180, 360 and 720 data points are obtained for observation.

● Create the following data set to predict price changes at time t.

Dataset S1: t - 180 ≤ S1 ≤ t

Dataset S2: t - 360 ≤ S2 ≤ t

Dataset S3: t - 720 ≤ S3 ≤ t

● A Generalized Linear Model (GLM) / Random Forest can be run on each of the three time series data sets to obtain linear models M 1 , M 2 , and M 3 corresponding to each data set.

○ At M1: Acquire ΔP1 and predict the price change at t

○ At M2: Acquire ΔP2 and predict the price change at t

○ At M3: Acquire ΔP3 and predict the price change at t

● You can then linearly combine these values to predict macro price movements.

ΔP = W0 + Sum of(Wi, ΔPi)

where W0 is the initial market price at t = 0,

Wi is the weight representing the influence of the data set Si

For 10-minute interval data:

● Forecasts based on larger price movements to achieve higher profitability, such as sending a buy or sell request in Bitcoin, require a 10-minute window. And the actual verification takes about 10 minutes. Therefore, prediction with a 10-second data set can be problematic.

● Time series data sets can be constructed for 30 minutes, 60 minutes, and 120 minutes, so 1800, 3600 and 7200 data points can be obtained for observation.

● Create the following data set to predict price changes at time t.

Dataset S1: t - 1800 ≤ S1 ≤ t

Dataset S2: t - 3600 ≤ S2 ≤ t

Dataset S3: t - 7200 ≤ S3 ≤ t

Long short-term memory:

● Long-short term memory (LSTM) network is a type of recurrent neural network, and this deep learning model is particularly useful for modeling and predicting time series data.

● Since daily Bitcoin price and features are time series data, LSTM can be used to predict the price of Bitcoin and to predict its rise or fall.

● LSTM blocks are similar to neurons in ANNs. There are three gates represented by the sigmoid function. forget(f), input(i) and output(o) gates

● In the LSTM block, Ct-1 is the memory or cell state of the previous block, ht-1 is the previous block output, Xt is the vector input, Ct is the cell state or memory of the current block, and ht is the output of the current block.

● At the intersection, Hadamard product is performed element by element, and in the same way, + junction summation is performed element by element.

● LSTM gate and cell state equations are given in (1) to (6).

ft=σg(Wfxt+Ufht-1+bf) · · · · · · · · · (1)

it=σg(Wixt+Uiht-1+bi) · · · · · · · · · (2)

ot=σg(Woxt+Uoht-1+bo) · · · · · · · · · (3)

c~t=σh(Wcxt+Ucht-1+bc) · · · · · · · · · (4)

ct=ft*ct-1+it*c~t · · · · · · · · · (5)

ht=ot*σh(ct) · · · · · · · · · (6)

here,

ft : the activation vector of the forget gate

W and U: the weight matrices

b : the bias vector

σg : the sigmoid function

it : the action vector of the input or update gate

ot : the activation vector of the output gate

C~t : the activation vector of the cell input

σh : the hyperbolic tangent function.

ct : the cell state or memory vector.

ht : the output vector of the LSTM block or the hidden state vector.

It may take 2 to 5 seconds for a customer (user, seller) to exchange cryptocurrency for fiat currency, and even during such a small time, the price of cryptocurrency not only fluctuates depending on the exchange, but also exchanges even for the same cryptocurrency. Since each market price is different, it is a feature of the present invention that when receiving a cryptocurrency trading order from a customer, the cryptocurrency exchange is automatically matched with the highest bid price at the time of actual payment so that the cryptocurrency is traded. The function of predicting the price of cryptocurrency and automatically interworking by selecting an exchange according to it, and a time series-based machine learning algorithm for predicting price fluctuations of cryptocurrency are described in detail above.

8 and 9, each step of a payment method using a cryptocurrency payment gateway is shown. Detailed descriptions of parts overlapping with those described above with reference to FIGS. 1 to 8 are omitted.

First, the DID management unit 108 issues a decentralized distributed ID to the seller and the user (S910).

The DID management unit 108 receives transaction-related information from the seller with which the user transacts, and authenticates the payment method used to process the transaction (S920).

The payment processing unit 107 generates a utility token in the public block chain (S930).

The payment processing unit 107 manages the utility token in the database and provides the utility token to the user when making a payment using cryptocurrency or fiat currency (S940).

The DID management unit 108 manages the user's purchase of the utility token and the payment using the utility token in the database (S950).

In addition, the exchange automatic linkage unit 326 predicts the price of the cryptocurrency using a time series-based machine learning algorithm when the user wants to exchange cryptocurrency for fiat currency, and the exchange with the highest predicted price among a plurality of exchanges by automatically matching the cryptocurrencies so that the trading of cryptocurrencies is automatically performed (S960).

The step (S950) of managing payment details using the utility token in the database will be described in detail as follows.

The order matching engine 319 checks the conversion value associated with cryptocurrency or fiat currency, matches the conversion value with the user's available utility tokens managed in the database, and prepares for order processing.

Then, the order processing engine 320 triggers a token transaction when preparation for order processing is completed, and when receiving token transaction confirmation from the block chain, updates the corresponding transaction details in the database.

The fiat currency automatic conversion unit 323 may further include the step of automatically depositing cryptocurrency into the fiat currency ledger in order to reduce the cryptocurrency ledger whenever the balance of the cryptocurrency wallet of the seller and the user rises above a preset level. there is.

In the step of depositing into the fiat currency ledger, when the exchange rate is favorable according to the calculation result of the exchange rate of the exchange rate calculator 324, the cryptocurrency is sold and deposited into the fiat currency ledger.

The step (S960) of automatically trading cryptocurrency is,

Cryptocurrency prediction modeling generating unit 327 collects a plurality of feature data representing cryptocurrencies, collects price data of the corresponding cryptocurrencies at regular time intervals, and predicts price changes at time t. A time series data set with data points is generated, each time series data set is applied to a machine learning algorithm to generate a linear model corresponding to each time series data set, and the generated linear model is used to generate the cryptocurrency of each exchange at time t. predict the price

Although the present invention has been described in detail with reference to preferred embodiments so far, those skilled in the art to which the present invention pertains can practice the present invention in other specific forms without changing the technical spirit or essential features thereof, The embodiments are to be understood in all respects as illustrative and not restrictive.

And, the scope of the present invention is to be specified by the claims to be described later rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. should be interpreted as

100: Cryptocurrency payment gateway
107: payment processing unit
108: DID management unit
109: client profile
110 : user profile
114: Issuer
115 : validator
210: permissioned blockchain
308, 309: incoming cron
312, 317, 318: public blockchain
311: Coin Market Cap API, External API
313: database
319 : Order Matching Engine
320 : order processing engine
321: token controller/swapper
322: token generating unit
323: fiat currency automatic conversion unit
324: exchange rate calculator
325: Cryptocurrency price prediction unit
326: Exchange automatic linkage
327: Cryptocurrency prediction modeling generation unit

Claims (15)

Provides an instance of the payment application to the user device, receives information related to the transaction from the merchant the user transacts with, authenticates the payment method used to process the transaction, and communicates with the cryptocurrency network to pay with cryptocurrency a payment processing unit that processes and communicates with a fiat currency network to process payment in fiat currency; and
a DID management unit that issues and verifies decentralized identities of sellers and users, and manages a seller profile that provides goods or services and a user profile that purchases goods or services provided by the seller;
When a user wants to exchange cryptocurrency for fiat currency, it predicts the future price of the cryptocurrency using a time-series-based machine learning algorithm, and checks the exchange and service fees provided by various exchange platforms available. a cryptocurrency price prediction unit that calculates by adding exchange and service fees to the predicted cryptocurrency price of each exchange; and
Collect a plurality of feature data representing a cryptocurrency, collect price data of the corresponding cryptocurrency at regular time intervals, and generate a time series data set having a different number of data points to predict the price change at time t, , A cryptocurrency prediction modeling generator that generates a linear model corresponding to each time series data set by applying each time series data set to a machine learning algorithm, and uses this to predict price changes at time t;
To predict the price change at the time t, a time series data set with 10-second intervals for 30, 60, and 120 minutes is constructed as follows,
Dataset S1: t - 180 ≤ S1 ≤ t
Dataset S2: t - 360 ≤ S2 ≤ t
Dataset S3: t - 720 ≤ S3 ≤ t
Obtain 180, 360, 720 data points from each data set, run a Generalized Linear Model (GLM) / Random Forest on each of the three time series data sets, and run the corresponding linear models M 1, M 2, M 3 for each data set. then get
obtain ΔP1 at M1, predict the price change at t,
obtain ΔP2 at M2, predict the price change at t,
Obtain ΔP3 at M3, predict the price change at t, and then linearly combine these values to predict the price change at time t,
The cryptocurrency price prediction unit predicts the cryptocurrency price of each exchange by using the linear model generated by the cryptocurrency prediction modeling generation unit.
The method according to claim 1,
The payment processing unit includes a token generation unit that generates a utility token in a public block chain; and
A token controller/swapper that manages the utility token generated by the token generator in the database and provides a utility token to the user when making a payment using cryptocurrency or fiat currency;
The user purchases a utility token, puts it in the user's cryptocurrency wallet, and uses it, fiat currency payment utility tokens are swapped in a 1:1 ratio, and the payment processing unit uses the utility token purchase history and utility tokens by the user Cryptocurrency payment gateway, characterized in that the payment details are managed in a database.
3. The method according to claim 2,
The payment processing unit
Identifies the conversion value associated with cryptocurrency or fiat currency, matches the conversion value with the user's available utility tokens managed in a database by the controller/swapper, and reduces the waiting time of a transaction when the order processing engine processes the order an order matching engine that prepares for minimization; and
Cryptocurrency payment gateway comprising: an order processing engine that triggers a token transaction when receiving a readiness signal from the order matching engine, and updates the transaction details in a database when receiving token transaction confirmation from the block chain .
3. The method according to claim 2,
A cryptocurrency payment gateway, characterized in that fiat currency and utility token swap prices are calculated using an external API for the current timestamp.
The method according to claim 1,
The DID management unit
a seller profile unit including the seller's cryptocurrency wallet and fiat currency ledger;
a user profile unit including the user's cryptocurrency wallet and fiat currency ledger;
Issuers who issue IDs of merchants and users; and
Cryptocurrency payment gateway comprising; a verifier that verifies the IDs of the seller and the user.
6. The method of claim 5,
The payment processing unit includes an automatic fiat currency conversion unit that automatically deposits cryptocurrency into the fiat currency ledger in order to reduce the cryptocurrency ledger whenever the balance of the cryptocurrency wallet of the seller and the user rises above a preset level. Cryptocurrency payment gateway featuring.
7. The method of claim 6,
It further includes; an exchange rate calculator that calculates the exchange rate between cryptocurrency and fiat currency.
The fiat currency automatic conversion unit sells cryptocurrency when the exchange rate is favorable according to the calculation result of the exchange rate calculator and deposits the cryptocurrency into the fiat currency ledger.
delete The method according to claim 1,
When a user exchanges cryptocurrency for fiat currency, an exchange automatic linkage unit that automatically matches the exchange with the highest price calculated and predicted by the cryptocurrency price prediction unit among a plurality of exchanges to conduct cryptocurrency trading; further includes; Cryptocurrency payment gateway, characterized in that.
delete The DID management unit issues a decentralized decentralized ID to the seller and the user;
The DID management unit includes: receiving transaction-related information from a seller with which the user transacts, and authenticating a payment method used to process the transaction;
The payment processing unit generates a utility token in a public blockchain;
The payment processing unit manages the utility token in the database and provides a utility token to the user when making a payment using cryptocurrency or fiat currency;
The DID management unit may include: managing, in a database, a user's purchase of a utility token and a payment using the utility token; and
When a user wants to exchange cryptocurrency for fiat currency, the exchange automatic linkage predicts the price of cryptocurrency using a time series-based machine learning algorithm, and automatically matches the exchange with the highest predicted price among a plurality of exchanges. A step of automatically making the trading of money; including,
The step of automatically making the trading of the cryptocurrency,
Cryptocurrency prediction modeling generating unit collects a plurality of feature data representing cryptocurrencies, collects price data of the corresponding cryptocurrencies at regular time intervals, and has a different number of data points to predict price changes at time t Create a time series data set, apply each time series data set to a machine learning algorithm to generate a linear model corresponding to each time series data set, and predict the cryptocurrency price of each exchange at time t using the generated linear model. ,
To predict the price change at the time t, a time series data set with 10-second intervals for 30, 60, and 120 minutes is constructed as follows,
Dataset S1: t - 180 ≤ S1 ≤ t
Dataset S2: t - 360 ≤ S2 ≤ t
Dataset S3: t - 720 ≤ S3 ≤ t
Obtain 180, 360, 720 data points from each data set, run a Generalized Linear Model (GLM) / Random Forest on each of the three time series data sets, and run the corresponding linear models M 1, M 2, M 3 for each data set. then get
obtain ΔP1 at M1, predict the price change at t,
obtain ΔP2 at M2, predict the price change at t,
A payment method using a cryptocurrency payment gateway, comprising obtaining ΔP3 from M3, predicting the price change at t, and then predicting the price change at time t by linearly combining these values.
12. The method of claim 11,
The step of managing payment details using the utility token in the database includes:
identifying a conversion value associated with cryptocurrency or fiat currency, matching the conversion value with a user's available utility tokens managed in a database, and preparing for order processing; and
A payment method using a cryptocurrency payment gateway, comprising: triggering a token transaction when preparation for order processing is complete, and updating the transaction details in a database when receiving token transaction confirmation from the block chain.
12. The method of claim 11,
Whenever the balance of the cryptocurrency wallet of the seller and the user rises above a preset level, automatically depositing the cryptocurrency into the fiat currency ledger to reduce the cryptocurrency ledger Using a cryptocurrency payment gateway, characterized in that it further comprises Payment Method.
14. The method of claim 13,
The step of depositing into the fiat currency ledger is,
A payment method using a cryptocurrency payment gateway, characterized in that when the exchange rate is favorable according to the calculation result of the exchange rate, the cryptocurrency is sold and the money is deposited into the fiat currency ledger.
delete

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