A proof of wallet approach is used for transaction validation for a digital currency. When a transaction is requested, a set of witness nodes are selected to form an ad hoc neural network. The witness nodes may be client devices of other users of the digital currency. Each witness node receives input information about the transaction (e.g., an encrypted amount and nonce) and neural network parameters (e.g., input weights and a bias). The input information passes through the ad hoc neural network, which generates an output validation value. The transaction is approved if the output validation value is consistent with a verification value generated from the transaction parameters, neural network parameters, and digital currency information stored on a blockchain. If the transaction is approved, the transaction is added to the blockchain in conjunction with the identity of the witness nodes and any other pertinent information

The present invention concerns a cryptocurrency-cash gateway, comprising a wallet interface (403) for communicating over a network with at least one crypto wallet (102) and an EFT gateway interface (404) for communicating over a network with at least one electronic funds transfer, EFT, gateway or financial institution (407), wherein the cryptocurrency-cash gateway is operable to perform a cryptocurrency-to-cash transaction for allowing a user to withdraw cash at an automatic transaction machine, ATM (110), or a point-of-sale, POS, system (110B) by exchanging a corresponding amount of a cryptocurrency from the crypto wallet(s); or conversely allowing the user to deposit cash at an ATM or POS system and exchanging it for a corresponding amount of a cryptocurrency to be deposited in at least one crypto wallet of the user.

A real estate platform for transferring fractional ownership interests of real property over a network includes a plurality of interface devices and a platform provider environment comprising at least one computer system, at least one database, at least one distributed ledger environment. The platform generating interfaces to facilitate an initial purchase of real property from an original seller to the platform provider, along with the generation of asset-based tokens for the transferred property. The platform providing options for allowing system users to buy and sell fractional ownership of the transferred property via the tokens. Each token holder is granted a legal interest in the property, each transaction is recorded by a distributed ledger, and the original seller's ownership percentage diminishes as tokens are purchased. Fractional owners are provided with landlord options for managing and profiting from the subject property.

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 device may obtain digital signature information relating to a quantity of a type of cryptocurrency, and receive transaction data relating to a credit account, associated with a user, after obtaining the digital signature information. The transaction data may include information identifying a transaction amount. The device may determine, after receiving the transaction data, an amount, of the type of cryptocurrency, that satisfies the transaction amount, perform, using the digital signature information, an action to conduct a sale of a portion of the quantity of the type of cryptocurrency based on determining the amount, and cause proceeds from the sale to be transferred to the credit account as payment for the transaction amount.

A system supports symmetric release of cryptologically-locked asset transactions. A leading exchange party and a reciprocal exchange party establish, at least in part, a peer challenge in a pre-exchange proposal. The reciprocal party uses the peer challenge to lock a cryptologically-locked asset transaction. The solution to the peer challenge corresponds to an exchange key controlled by the leading exchange party. After establishment of the cryptologically-locked asset transaction, the leading party may request that exchange logic initiate release of the cryptologically-locked asset transaction. In response to the request, the exchange logic may execute a symmetric release of the exchange key and/or signature to the reciprocal exchange party and cryptologically-locked asset transaction (such that the asset is transferred to the leading exchange party).

The disclosed embodiments provide a distributed transaction system including a group of validator nodes that are known to each other in a network but are indistinguishable to other network nodes. The validator nodes form a Committee including a Leader node and one or more Associate nodes configured to receive and process transaction requests and candidate requests, for example, to add new blocks to one or more blockchains. The Committee may be dynamically changed, such that new network nodes may be added to the Committee or may replace existing validator nodes. The Associate nodes also may coordinate with each other to select a new Leader node. The system may allow multiple request-fulfillment process to run simultaneously, thereby enhance the efficiency of the system. The disclosed embodiments reduce the distributed system's reliance on the stability of any particular node(s) in the network, as the validator nodes in the Committee may be changed at a sufficient frequency to remove unreliable, unavailable, or otherwise untrusted nodes. Further, the disclosed embodiments provide a scheme that helps ensure the Leader node, as well as the other Committee members, functions properly.

The disclosed embodiments provide a distributed transaction system including a group of validator nodes that are known to each other in a network but are indistinguishable to other network nodes. The validator nodes form a Committee including a Leader node and one or more Associate nodes configured to receive and process transaction requests and candidate requests, for example, to add new blocks to one or more blockchains. The Committee may be dynamically changed, such that new network nodes may be added to the Committee or may replace existing validator nodes. The Associate nodes also may coordinate with each other to select a new Leader node. The system may allow multiple request-fulfillment process to run simultaneously, thereby enhance the efficiency of the system. The disclosed embodiments reduce the distributed system's reliance on the stability of any particular node(s) in the network, as the validator nodes in the Committee may be changed at a sufficient frequency to remove unreliable, unavailable, or otherwise untrusted nodes. Further, the disclosed embodiments provide a scheme that helps ensure the Leader node, as well as the other Committee members, functions properly.

The disclosed embodiments provide a distributed transaction system including a group of validator nodes that are known to each other in a network but are indistinguishable to other network nodes. The validator nodes form a Committee including a Leader node and one or more Associate nodes configured to receive and process transaction requests, for example, to add new blocks to one or more blockchains. The Committee may be dynamically changed, such that new network nodes may be added to the Committee or may replace existing validator nodes. The Associate nodes also may coordinate with each other to select a new Leader node. The disclosed embodiments reduce the distributed system's reliance on the stability of any particular node(s) in the network, as the validator nodes in the Committee may be changed at a sufficient frequency to remove unreliable, unavailable, or otherwise untrusted nodes. Further, the disclosed embodiments provide a scheme that helps ensure the Leader node, as well as the other Committee members, functions properly.

Systems and methods for managing cryptocurrency systems.