The present disclosure relates to a system for locking a digital asset. In one implementation, the system may include a first computer node that reads a private data store associated with the first computer node and/or reads a distributed ledger to confirm a digital asset is unlocked and can be transferred from the first computer node. The first computer node cryptographically signs and sends a proposed digital lock to a second computer node. When activated, the digital lock prevents transfer of the digital asset from the first computer node to another computer node that is not the second computer node. The first computer node also reads a distributed ledger to confirm the distributed ledger contains the digital lock in an activated state. The first computer node transfers the digital asset from the first computer node to the second computer node.

Systems, as described herein, may use smart contracts and distributed ledgers in distributed networks to determine points earned by consumer and settle points for merchants. Distributed ledgers in the distributed network may be used to store transactions executed by merchant digital wallets and consumer digital wallet. Smart contracts in distributed networks may be used to maintain point balances associated with the consumer digital wallets and the merchant digital wallets of the consumer, determine points earned by consumer digital wallets, settle points for merchant digital wallets, and send messages to consumer digital wallets regarding expiring points. Systems, as described herein, may also send individualized recommendations of goods and services to the consumer digital wallets.

A computer-implemented method for seamlessly processing transactions using distributed ledger technology. The method may comprise: linking one or more conventional accounts hosted in a conventional banking infrastructure to one or more DLT-based client accounts hosted on a distributed ledger, wherein the DLT application comprises a routing address configured to be used in conventional transaction infrastructure using conventional communication protocols; storing one or more wallet identifications for the one or more DLT-based client accounts and a mapping of the one or more wallet identifications to the one or more conventional accounts hosted in the conventional banking infrastructure; exchanging a sequence of messages to execute an asset transfer and complete a transaction lifecycle, the sequence of messages based on the first asset type; updating the distributed ledger based on the asset transfer; and sending appropriate messages to clients.

An electronic payment device and methods of its operation are disclosed. The payment device has a secure element for storing payment tokens, each associated with a payment card; an input interface that enables a user to select from among the payment cards; a display interface; and a processor. In response to a user selection of one of the payment cards by way of the input interface, a descriptor of the selected payment card is displayed by way of the display interface; and an unconsumed one of the payment tokens associated with the selected payment card is activated to prepare the payment card device for effecting payment using the selected payment card, thereby consuming the payment token. The payment device also includes a wireless communication interface for receiving additional payment tokens, thereby replenishing the payment tokens.

Systems, methods, and computer-readable storage media of private network issuance of digital currency. One method includes receiving an issuance request associated with a first denomination of digital currency. The method further includes issuing a first digital currency token, wherein issuing is an off-chain exchange transferring the first denomination outside a digital currency ledger.

Provided is a system and method for secure exchange of user cookie-data and user interactions with a mining station for cryptocurrency. The method including: associating a cryptocurrency wallet with each user; receiving mining information from the mining station, the mining information including user interactions associated with one of the users at the mining station; and distributing cryptocurrency to the cryptocurrency wallet associated with each user based on the mining information associated with such user.

A token management server and associated methods are disclosed. In one embodiment, the token management server comprises a gateway engine for indexing digital items stored on web servers and blockchains and comparing the indexed items to a non-fungible token (NFT) and its associated digital asset. The token management server optionally comprises a rights assignment and management engine for automatically generating ownership documentation for an asset associated with the NFT and tracking subsequent changes of ownership of the asset, a successor management engine for automatically assigning ownership and control of the NFT and digital asset or a fungible token if the owner does not interact with the token management server within a certain predetermined amount of time, and a loss prevention engine for providing an owner with a backup mechanism for accessing an NFT and digital asset or a fungible token if the owner loses his or her primary credentials.

Various aspects of the subject technology relate to systems, methods, and machine-readable media for proposing blocks to be added to a blockchain. Various aspects may include performing adding block headers to a first blockchain, wherein the block headers reference a set of validators. Aspects may also include adding a temporal parameter to each block header. Aspects may also include determining, based on a block signature from a block header and from the set of validators, a proposer of candidate blocks for addition to the blockchain. Aspects may also include sampling, based on a temporal parameter, a subset of validators of the set of validators. Aspects may include increasing the proposer to a plurality of proposers from the subset of validators by an incremental quantity based on a comparison of the temporal parameter to a threshold.

A method of retail engagement includes receiving a worn article from a user in a retail establishment, where the worn article includes dirt or debris on an outer surface of the article. The method then includes robotically cleaning the worn article to at least partially remove the dirt or debris on the outer surface. The cleaning comprises contacting the shoe with a rotating brush, and at least one of the worn article or the rotating brush is robotically manipulated to cause the contacting. Finally, the outer surface of the article may be adorned with one or more adornments, where the one or more adornments are selected by the user.

A diamond asset comprising one or more diamonds and an encryption chip is used to asset-back a cryptographic token that can be used to conduct transactions. The cryptographic token is written to a blockchain using a smart contract that is configured to enable a transaction associated with the token in response to two or more of: a signature by the encryption chip, a signature by the owner of the diamond asset, and a validation of a visual layout of the diamond asset.