A method and a system for multi-block mining in at least one single round under different consensus schemes. Embodiments can utilize a concept of sequential multiple block mining in (a) single mining round(s) from a single node. Thereby, the node can separate the transactions based on the context to select the appropriate consensus algorithm in order to use multiple consensus algorithms at the same mining round, one for each block (not one after another in different mining rounds).

Computer-implemented methods, non-transitory, computer-readable media, and computer-implemented systems for blockchain-based payment withholding and agreement signing are described. In one computer-implemented method, an agreement signing transaction submitted by a user is received and used to authorize a payment system to provide a payment withholding service for a payment order of the user in a third-party service system. The agreement signing transaction includes agreement signing information of a tripartite agreement submitted by the user. Withholding verification logic declared in a first smart contract published on the blockchain is invoked to check whether there is a withholding agreement signed between the payment system and the third-party service system on the blockchain. If yes, the tripartite agreement is created that authorizes the payment system to provide the payment withholding service for the payment order for the user and published to the blockchain for certificate storage.

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain data storage. One of the methods includes receiving a transaction associated with a blockchain network; determining, after the transaction is performed, an updated account state of a blockchain account involved in the transaction; adding, to a history state object database and after a current block is appended to a blockchain associated with the blockchain network based on performing a consensus algorithm, the updated account state, a hash value of the updated account state, an account identifier (ID) of the blockchain account, and a block ID of the current block; and updating, based on the hash value of the account state, the account ID, and the block ID, a state tree stored in a history state database.

The present invention discloses a method or a system for verifying, storing and tokenizing data in cryptocurrency mining process by exchanging user data anonymously. The method comprises various steps like creating one or more smart contracts between a user and an application or platform or software, inputting by the user on a user device, user information onto the application or the platform or the software through an user interface, providing by the application or the platform or the software an option to store the inputted user information on to a server or database, confirming or verifying the storing of the user information onto the server or database, generating one or more digital tokens by the application or the platform or the software in response to the stored user information at the server or database, assigning by the application or the platform or the software, a blockchain network based wallet address to the user device and transferring by the application or the platform or the software, the generated tokens to the wallet address of the user.

A method for electronic transaction monitoring and reporting includes: determining whether the received transaction request is encrypted, upon determining that the received transaction request is not encrypted, sending a failure alert to the merchant, determining a receiving acquirer processor for the transaction request, and transmitting the transaction request to the determined acquirer processor.

Disclosed herein is digital object generator that makes uses a one-way function to generate unique digital objects based on the user specific input. Features of the input are first extracted via a few-shot convolutional neural network model, then evaluated weight and integrated fit. The resulting digital object includes a user decipherable output such as a visual representation, an audio representation, or a multimedia representation that includes recognizable elements from the user specific input.

An embodiment server comprises a communicator; and a controller configured to control the communicator, wherein the controller is configured to: in response to receiving connected car service (CCS) subscription information and card information from a vehicle through the communicator, determine whether a card issued to a card integrated circuit (IC) chip of an electronic toll collection system (ETCS) terminal of the vehicle is valid, based on the CCS subscription information and the card information; in response to the card being valid, control the communicator to transmit a normal card confirmation message comprising a security key to the vehicle; and in response to the card being invalid, control the communicator to transmit a card deletion command comprising an authorization key to the vehicle.

A method and system are disclosed to audit smart contracts. The method includes: publishing, with a processing server, a smart contract bytecode with metadata on a blockchain; retrieving, with the processing server, the published smart contract bytecode with metadata from the blockchain; extracting, with the processing server, the smart contract bytecode from the published smart contract bytecode; and verifying the smart contract bytecode by comparing a computed hash of a high-level source code of the published smart contract bytecode with the metadata retrieved from the blockchain.

An information processing apparatus, which is communicable with a printing device, includes a control device configured to: receive an obtainment application of paid authority information guaranteeing a paid guaranteed printing amount by a purchasing user; add a value of the paid guaranteed printing amount relating to the corresponding paid authority information to a value of an allowable printing amount for the printing device; associate free authority information guaranteeing a free guaranteed printing amount corresponding to the paid guaranteed printing amount with identification information of the printing device; receive a utilization application of the free authority information associated with the identification information of the printing device; and add a value of a utilized printing amount within the free guaranteed printing amount corresponding to the free authority information to the value of the allowable printing amount.

A request to resolve a name of a domain of an identifier of web content is received. It is automatically determined that the name of the domain is to be resolved using a blockchain. A request is sent to a smart contract of the blockchain to obtain one or more resolution records for the domain. The one or more resolution records of the domain are received. The received one or more resolution records are utilized to resolve the name of the domain.