Abstract: Provided are a digital currency-based transaction method and apparatus, relating to the technical field of digital currency. A specific implementation includes: establishing a Near Field Communication (NFC) connection with a transaction receiver (S101); exchanging an interaction capability parameter with the transaction receiver by means of the NFC connection, and performing a transaction feature negotiation to obtain transaction features supported by both parties of a transaction (S102); and initiating the transaction according to the transaction features, and completing the transaction with the transaction receiver according to the transaction features (S103). The present disclosure has the following beneficial implications that a quick transaction can be realized, a transaction success rate is improved, and the transaction performance is optimized.

Abstract: The present disclosure relates to the technical field of computers. Provided are a positioning and paying method, apparatus and system based on the Internet of Vehicles. A specific implementation of the method comprises: an in-vehicle client obtains position information of a vehicle on the basis of the Internet of Vehicles; and a management server determines a corresponding service entity for the vehicle on the basis of the position information, so as to automatically complete a fee payment operation by using a first digital currency wallet that is included in the in-vehicle client and a second digital currency wallet that is included in the service entity. Thus, the problems of a low degree of automation and a low payment efficiency caused by manual fee payment are overcome, thereby enhancing the user experience.

Abstract: The present disclosure discloses a method and an apparatus for data verification, and relates to the field of computer technology. A implementation of the method includes: performing a first verification on data-to-be-verified, where the data-to-be-verified includes a first contract parameter, a identifier of the smart contract, and a first execution result; processing, after the first verification is passed, the first contract parameter to obtain second contract parameter, and executing a smart contract based on the second contract parameter to obtain a second execution result; and sending the second contract parameter, the identifier of the smart contract, and the second execution result to a consensus verification node for a consensus verification.

Abstract: The disclosure relates to a method, apparatus and system for sharing files, and mainly relates to the technical field of computers. One specific implementation mode of the method comprises: acquiring files to be shared, and uploading, on a blockchain, formed compressed file packages; generating by calculation a root hash value in accordance with file names of the compressed packages and hash values thereof; and acquiring respective compressed file packages in a blockchain in accordance with the root hash value.

Abstract: A file sharing method, apparatus, and system, mainly relate to the technical field of computers. The method comprises: obtaining a file to be shared; concurrently transmitting the shared file compression packages onto a blockchain; forming data blocks according to a compressed package file name and a hash value thereof, wherein the data blocks comprise the hash value of a previous data block; using the hash value of a last data block as a root hash value; and according to the root hash value, obtaining a file comprised in the last data block, and then obtaining each file compression package in a blockchain indicated by the root hash value.

Abstract: The present disclosure relates to a digital currency-based payment method, platform and system, and a terminal, and relates to the technical field of computers. An implementation of the method includes: receiving a target payment request for a first digital currency in a frozen state, the first digital currency in the frozen state being generated based on a pre-payment request and a pre-configured pre-payment deposit smart contract; generating a second digital currency according to a target payment amount indicated by the target payment request, the first digital currency, and a pre-configured pre-payment verification smart contract; and sending the second digital currency to a first account corresponding to the first digital currency. The implementation improves the transaction security, and is conducive to protecting the rights and interests of a user.

Abstract: The present disclosure relates to the technical field of computers. Disclosed are a methodand apparatus for classifying a blockchain address. A specific implementation of the method includes: acquiring blockchain transaction information, where the blockchain transaction information indicates one or more transaction input addresses and one or more transaction output addresses; constructing a transaction bipartite graph corresponding to the blockchain transaction information; obtaining, according to the transaction bipartite graph and a graph embedding algorithm, address vectors respectively corresponding to the one or more transaction input addresses and the one or more transaction output addresses; and using the address vectors as inputs of an address classifier, so as to classify the one or more transaction input addresses and/or the one or more transaction output addresses by the address classifier. By means of the implementation, the accuracy of blockchain address classification is improved.

Abstract: A digital currency payment method and system, and an apparatus, a security chip, and an application method, which relate to the technical field of computers. The payment method includes: generating a transaction amount, or acquiring, by means of a communication connection between a first client and a second client, the transaction amount sent by the second client; and sending a payment request to the second client by means of the communication connection, where the payment request indicates a first digital currency corresponding to the transaction amount or a circulation identifier of the first digital currency, so as to enable a second currency management apparatus corresponding to the second client to cash a second digital currency corresponding to the transaction amount to a first currency management apparatus corresponding to the first client.

Abstract: Provided are a digital currency payment method, apparatus, and system, and relates to the technical field of computers. A specific implementation of the method includes: sending a transaction amount to a first currency management apparatus corresponding to a first client, so as to enable the first currency management apparatus to determine whether the transaction amount is greater than an available balance of a first digital currency used for payment; and in the case where the transaction amount is not greater than the available balance, sending a payment request to a second client, the payment request indicating the first digital currency or a circulation identifier of the first digital currency, so as to enable a second currency management apparatus corresponding to the second client to cash, for the first currency management apparatus, a second digital currency corresponding to the transaction amount.

Abstract: The disclosure relates to the technical field of computers. Disclosed are a digital currency management method, apparatus and system. A specific implementation of the method includes: sending one or more first digital currencies to a first currency management apparatus corresponding to a first client, where the one or more first digital currencies belong to one or more second currency management apparatuses different from the first currency management apparatus; and receiving a second digital currency, which is generated by the first currency management apparatus according to the one or more first digital currencies, where the denomination of the second digital currency is equal to the sum of denominations of the one or more first digital currencies.

Abstract: The present disclosure relates to a method, terminal and system for splitting, and managing a digital currency in a transaction. The method includes: determining a first transaction request indicating a digital currency and first transaction information; generating second transaction information including a second transaction amount according to the first transaction information; respectively signing the first transaction information and the second transaction information by using a private key of a first terminal; generating a first trust chain according to the signed first transaction information and the digital currency, and generating a second trust chain according to the signed second transaction information and the digital currency; and sending the first trust chain to a second terminal, so that the second terminal and the first terminal achieve, according to the first trust chain, an offline transaction corresponding to the first transaction amount included in the first transaction information.

Abstract: Provided are a method and apparatus for generating a random number in a blockchain, wherein the method includes: a first random number and a first digest value of the first random number are locally generated by a first node in a blockchain; the first node submits the first digest value to a smart contract; the smart contract broadcasts a first service; the smart contract determines a second node from the at least one blockchain node; when the first service ends, the first node submits the first random number to the smart contract; when the smart contract verifies that the first random number corresponds to the first digest value, the smart contract generates a second random number based on a second digest value of the second node and the first random number; and a second service is started based on the second random number.

Abstract: Disclosed are a method, apparatus and system for exporting and recharging a digital currency, which mainly relate to the technical field of computers. The method includes: receiving a generation request of a digital currency sent by a digital currency terminal, wherein the generation request indicates a first denomination of the requested digital currency and user information corresponding to the digital currency terminal (S101); determining, according to the user information, an available currency corresponding to the user information and a second denomination of the available currency (S102); generating, according to the available currency and the second denomination of the available currency, the digital currency corresponding to the user information and the first denomination, and recording a status of the digital currency as an export status (S103), and notifying the digital currency terminal of the digital currency in the export status (S104).

Abstract: The present disclosure relates to the technical field of computers, in particular to a method and apparatus for classifying a blockchain address. The method includes: transaction vectors are generated for transaction records corresponding to each blockchain address in a blockchain address set; a corresponding address vector is generated based on the transaction vectors corresponding to a blockchain address to be classified; and the address vector of the blockchain address to be classified is input into a classifier, so as to determine a class of the blockchain address to be classified. By means of the method, equal-length vectors representing the blockchain addresses can be obtained for classification by the classifier, transaction behaviors and association relationships of participating entities in a blockchain are effectively expressed.

Abstract: A digital currency payment method and system, and an apparatus, a security chip, and an application method, which relate to the technical field of computers. The payment method includes: generating a transaction amount, or acquiring, by means of a communication connection between a first client and a second client, the transaction amount sent by the second client; and sending a payment request to the second client by means of the communication connection, where the payment request indicates a first digital currency corresponding to the transaction amount or a circulation identifier of the first digital currency, so as to enable a second currency management apparatus corresponding to the second client to cash a second digital currency corresponding to the transaction amount to a first currency management apparatus corresponding to the first client.

Abstract: A digital currency payment method and system, and an apparatus, a security chip, and an application method, which relate to the technical field of computers. The payment method includes: generating a transaction amount, or acquiring, by means of a communication connection between a first client and a second client, the transaction amount sent by the second client; and sending a payment request to the second client by means of the communication connection, where the payment request indicates a first digital currency corresponding to the transaction amount or a circulation identifier of the first digital currency, so as to enable a second currency management apparatus corresponding to the second client to cash a second digital currency corresponding to the transaction amount to a first currency management apparatus corresponding to the first client.

Abstract: A file sharing method, apparatus, and system, mainly relate to the technical field of computers. The method comprises: obtaining a file to be shared; concurrently transmitting the shared file compression packages onto a blockchain; forming data blocks according to a compressed package file name and a hash value thereof, wherein the data blocks comprise the hash value of a previous data block; using the hash value of a last data block as a root hash value; and according to the root hash value, obtaining a file comprised in the last data block, and then obtaining each file compression package in a blockchain indicated by the root hash value.