A computer-implemented method and system is provided that maintains blocks of a blockchain across nodes of a sharded blockchain network, wherein each node is a member of one or more shards of a plurality of active shards. The method and system employ a given node that is a member of a particular subset of the plurality of active shards to generate data representing a new block of the blockchain and store the data representing the new block. Such data includes i) a list of transaction identifiers for transactions that are part of the new block and associated with the particular subset of the plurality of active shards, and/or ii) a Partial Merkle Tree for the new block.

The invention relates to the fields of tokenisation, blockchain and smart contract technologies. It provides a technical arrangement which simplifies the automated management of contracts. The invention comprises a method and system which use a computer-based repository for storage of the contract. The contract is then represented by a transaction on the blockchain. Metadata within the transaction's script includes a hash of the contract and a means of identifying its location within the repository. The transaction also includes an unspent output (UTXO) which indicates its status as an open (ie not terminated) contract. The contract is terminated by spending the output at a later point in time, for example, using nLockTime+CheckLockTimeVerify (CLTV). By combining this concept with other techniques and computing components, the invention can provide a powerful mechanism for implementing various tasks such as renewing or rolling over the contract, or dividing it into sub-contracts or conditions. Furthermore, as the status and existence of the contract is evidence via the blockchain, this provides a permanent, publicly visible and non-alterable record of the contract.

The method comprises transferring a digital asset from a first user to a second user. The method comprises authenticating the first user as the owner of the digital asset by inspecting a transaction database. The method comprises transferring the digital asset from the first user to the second user by updating the transaction database so as to identify the second user as the owner of the digital asset; and by providing a graphic asset associated with the digital asset to a user electronic device of the second user. The transfer of the digital asset may be validated using a distributed ledger such as a blockchain. The method may be performed by a system 800 comprising user electronic devices 200A, 200B, 200C, and a transaction database 801. The system comprises a user electronic device 200 comprising a communicator 201, and a processor 207 communicatively coupled to the communicator 201.

Systems and methods exchange a nonfungible token (NFT) via blockchain cross-chain fungible token transfers using first and second blockchains. The first blockchain holds the NFT in a first escrow digital wallet. The NFT is available for trade by a seller and is associated with a trade value. The first blockchain monitors a balance of fungible tokens, owned by a buyer, that are transferred from a second blockchain to a second escrow digital wallet of the first blockchain. In response to detecting that the balance monitored represents the trade value, the first blockchain transfers, simultaneously, (i) the NFT from the first escrow digital wallet to a first digital wallet of the first blockchain, the first digital wallet owned by the buyer, and (ii) the balance of fungible tokens from the second escrow digital wallet to a second digital wallet of the second blockchain, the second digital wallet owned by the seller.

A secure multi-cryptocurrency payment gateway is provided. An interface is provided to a customer to select the cryptocurrency exchange may include a login uniform resource locator (URL) of a cryptocurrency exchange. Alternatively, the interface provided to the customer to select the cryptocurrency exchange may include a quick response (QR) payment code for the cryptocurrency exchange. Alternatively, the interface provided to the customer to select the cryptocurrency exchange can include a first further token that includes the token representing the payment request, the first further token allows the customer to authorize the cryptocurrency exchange to send the payment gateway a second further token including the first further token that allows the payment gateway to retrieve a balance amount and a transaction history of the cryptocurrency wallet of the customer.

Embodiments of the present application disclose a method and a device for connecting to a wireless access point. A specific implementation of the method includes: receiving a request for connecting to a wireless access point sent by a terminal device; sending an address of a router to the terminal device, in which the router is a node in a blockchain, and the address of the router is an address of the node to which the router in the blockchain belongs; receiving verification information sent by the terminal device to the address of the router; generating a verification result based on the verification information; and if the verification result indicates that verification is successful, granting the terminal device a permission to connect to the wireless access point. The implementation provides a new method for connecting to a wireless access point, thereby enriching methods for connecting to a wireless access point.

A crypto ETP is administered by a portfolio modeling computer/(PMC), a fund administration computer/(FAC), an order taking platform computer/(OTP), a custodian computer/(CC), and a paying agent settlement computer/(PASC). The PMC defines the ETP and captures data for a cryptocurrency index. The CC tracks Underlying Assets held by the ETP, and sends the data to the FAC, which calculates the NAV of the Underlying Assets to generate a Portfolio Composite File/(PCF) sent to the OTP. The OTP receives and validates/confirms with the CC, orders for creations and redemptions of the ETP from Authorized Parties/(APs), in exchange for the Underlying Assets and/or cryptocurrency. The PASC provides settlement on the Exchange in cryptocurrency by: receiving confirmation from the CC of transfer of underlyings, ETPs or cryptocurrency from the APs to a blockchain wallet associated with the PCM; and issuing units of the ETPs, underlyings or cryptocurrency to the APs.

Disclosed herein are systems and methods for a system for authorizing proxy number token requests. The system may comprise a memory storing instructions and at least one processor configured to execute instructions to perform operations. These operations may comprise receiving a first request to use a proxy number token to complete a first action associated with a first entity; authorizing the first request; receiving a second request to use the proxy number token to complete a second action associated with a second entity; determining a modifiable relationship data binding associated with the first and second entities, the modifiable relationship data binding comprising multiple parameters; determining that the second request satisfies the parameters; and authorizing the second request based on a determination that the second request satisfies the parameters.

The present disclosure provides methods and systems for performing a transfer of at least one resource across a computer-implemented network from a user's non-custodial digital wallet to a recipient. The disclosure provides solves technical challenges to provide a novel infrastructure and network architecture for enabling a transfer between a user (e.g. customer) and a recipient (e.g. merchant) involving the use of non-custodial digital wallets to effect transfer via a blockchain. The disclosure also provides an enhanced security and verification/authentication solution because it uses cryptographic techniques to implement the solution on a blockchain (e.g a variation of the Bitcoin protocol or other protocols) whilst reducing the resources required by known arrangements for native cryptocurrency transfers from a digital wallet at a location of a recipient's device e.g. an electronic Point of Sale (PoS), IoT device etc.

Computer-implemented systems, methods, and products for enabling one or more nodes of a first electronic ledger platform to carry out operations with respect to one or more records of the first electronic ledger platform. The operations may include receiving an indication from a smart contract to manage a transaction associated with purchase of a token and processing financial information associated with the purchase of the token to initiate the transaction. The financial information may include a value associated with the token, a source of funds for the purchase, and a destination account for transfer of currency from the source of funds. One or more events or information associated with the transaction are verified to confirm transfer of the token from a selling entity to a purchasing entity.