Abstract: 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.

Abstract: Trustless deterministic state machines can be implemented using a blockchain infrastructure and state machines can run concurrently over more than one blockchain transaction. The transactions can be done in a Bitcoin blockchain ledger. A unlocking transaction constraint that constrains an unlocking transaction to include a transaction input that references a previous transaction output is determined. A redeemable transaction is created to include a transaction output that includes an amount and a transaction locking script that includes the unlocking transaction constraint, with unlocking the amount being contingent upon execution of at least one unlocking script of the unlocking transaction satisfying the unlocking transaction constraint. The redeemable transaction is caused to be validated at a node of a blockchain network.

Abstract: Computer implemented methods are provided that create and/or validate a spending blockchain transaction that includes i) a plurality of locking scripts each representing an instance of an execution thread (which can be execution threads that are forked from an execution thread represented by a locking script of a previous blockchain transaction and/or execution threads of at least one previous blockchain transaction that are managed and/or controlled for inter-thread communication and control) or ii) a locking script representing an instance of an execution thread joined from a plurality of execution threads represented at least one previous blockchain transaction. Once created and/or validated, the spending blockchain transaction can be communicated on a blockchain network for storage in a blockchain ledger. The blockchain transactions can implement thread-specific locking scripts and associated fork, join and barrier constructs for concurrent or asynchronous threads of execution.

Abstract: A computer-implemented method of validating a blockchain transaction is disclosed. The method comprises requesting at least one UTXO referenced by at least one respective input of the transaction from a member node of at least one shard comprising at least one UTXO, obtaining validity data of at least one UTXO from at least one node, and performing a validation check on at least one input using the validity data.

Abstract: The invention relates to distributed ledge technologies such as consensus-based blockchains. Methods for causing an injection of a serialized previous transaction into a locking script are described. The invention is implemented using a blockchain network, which may be, for example, a Bitcoin blockchain. A first transaction to validate is received at a node in a blockchain network, with the first transaction including a first script. The first script, as a result of being executed, causes the node to at least obtain a first set of field values corresponding to the first transaction and obtain a second set of field values corresponding to a particular transaction. A second transaction is obtained, with the second transaction having been validated and including a second script.

Abstract: The disclosure is related to injection of a serialized set of field values of an unlocking transaction into a locking script, such as for distributed ledge technologies and consensus-based blockchains. A first transaction to validate is received at a node in the blockchain network. The first transaction includes a first script that includes a set of field values of the first transaction and, as a result of being executed, causes the node to obtain a set of field values. A second transaction is obtained, with the second transaction having been validated. The second transaction includes a second script that, as a result of being executed, causes the node to generate a signature based at least in part on the set of field values supplied as a result of execution of the first script. The first transaction is validated by execution of the first script and the second script.

Abstract: The invention relates to distributed ledger technologies such as consensus-based blockchains. Computer-implemented methods for a self-replicating smart contract with termination condition are described. The invention is implemented using a blockchain network. A first transaction including a first script is validated by a node in the blockchain network including a third script, and a second set of field values of a second transaction, wherein the second set of field values includes a copy of the second script causing to obtain the second transaction. The second transaction includes a second script, validated by a node upon determining that a termination condition is unfulfilled, at least obtaining the third script from the first set of field values, and determining that the copy of the second script matches the third script. The first transaction is validated as a result of execution of the first script and the second script.

Abstract: The invention relates to distributed ledger technologies such as consensus-based blockchains. Computer-implemented methods for locking and unlocking blockchain transactions are described. The invention is implemented using a blockchain network. A first unlocking script of the unlocking blockchain transaction is configured to unlock a first locking script, wherein the first locking script is configured, when executed together with the first unlocking script, to determine, based on the first locking script and a constraint for verifying the unlocking blockchain transaction. Verifying the unlocking blockchain transaction is based on a set of constraints and corresponding field of the unlocking blockchain transaction, wherein data is based on the set of constraints. Providing data at the corresponding field of the unlocking blockchain transaction. Finally, making the unlocking blockchain transaction available to one or more nodes of a blockchain network.

Abstract: The invention relates to distributed ledger technologies such as consensus-based blockchains. Computer-implemented methods for locking blockchain transactions are described. The invention is implemented using a blockchain network. A first locking script is configured in a blockchain network. The first locking script is executed together with a first unlocking script, based on data obtained by executing the first unlocking script and a set of constraints. Verification that a first set of field values of the unlocking blockchain transaction is obtained by executing the first unlocking script and the set of constraints against the unlocking blockchain transaction. Validating the unlocking blockchain transaction according to the set of constraints. Finally, making the locking blockchain transaction available to one or more nodes of the blockchain network.

Abstract: A computer-implemented method of partitioning a blockchain network into shards is disclosed. The method comprises the steps of identifying a transaction id of a blockchain transaction and allocating the transaction to a shard based on the transaction id.

Abstract: Techniques are provided for causing an injection of a serialized previous transaction into a locking script. A first script, of a first transaction to be validated, causes a node to at least obtain a first set of field values corresponding to the first transaction and obtain a second set of field values corresponding to a particular transaction. A second script, included in a second transaction, causes the node to at least obtain the first set of field values and the second set of field values of the particular transaction supplied as a result of execution of the first script, extract a transaction identifier from the first set of field values, and determine, based at least in part on the second set of field values, that the particular transaction corresponds to the transaction identifier. The first transaction is validated by executing the first script and the second script.

Abstract: The invention relates to distributed ledge technologies such as consensus-based blockchains. Computer-implemented methods for securely providing undetermined data from a determined or undetermined source are described. The invention is implemented using a blockchain network, which may be, for example, a Bitcoin blockchain. A first transaction to validate is received at a node in a blockchain network, with the first transaction including a first script that includes at least a first value, at least a portion of which includes data that is unconstrained by a second script, and a second value. A second transaction is obtained. The second transaction having been validated and including the second script that, as a result of being executed, causes the node to obtain the first value and the second value as a result of execution of the first script, and validate, based at least in part on first value and the second value, that the data is associated with a data source.

Abstract: A wearable heads-up display (“HUD”) for a pharmacy workflow management system is disclosed herein. An example HUD includes smart-glasses that are communicatively coupled to a client device. The smart-glasses include at least one camera and/or barcode scanner to record information needed for the verification of a medication dose during medication formulation preparation. The smart-glasses include at least one microphone to record voice commands. Further, the smart-glasses include at least one embedded display screen that shows sequential steps of a preparation protocol for guiding a pharmacy technician to prepare a medication dose. An application on the client device and/or the smart-glasses is configured to recognize and use voice commands to provide navigation for the embedded display screen. The voice commands may also be used to provide data entry for medication dose preparation verification. Gestures may be detected by the camera and translated by the application into navigation or data entry commands.

Abstract: A computer-implemented method of validating a blockchain transaction is disclosed. The method comprises requesting at least one UTXO referenced by at least one respective input of the transaction from a member node of at least one shard comprising at least one UTXO, obtaining validity data of at least one UTXO from at least one node, and performing a validation check on at least one input using the validity data.

Abstract: The disclosure is related to injection of a serialized set of field values of an unlocking transaction into a locking script, such as for distributed ledge technologies and consensus-based blockchains. A first transaction to validate is received at a node in the blockchain network. The first transaction includes a first script that includes a set of field values of the first transaction and, as a result of being executed, causes the node to obtain a set of field values. A second transaction is obtained, with the second transaction having been validated. The second transaction includes a second script that, as a result of being executed, causes the node to generate a signature based at least in part on the set of field values supplied as a result of execution of the first script. The first transaction is validated by execution of the first script and the second script.

Abstract: The invention relates to distributed ledge technologies such as consensus-based blockchains. Computer-implemented methods for a trustless, deterministic state machine are described. The invention is implemented using a blockchain network, which may be, for example, a Bitcoin blockchain. A first transaction validate is received at a node in a blockchain network. The first transaction includes a first script that, as a result of being executed, causes the node to at least obtain a first set of field values of the first transaction, a second set of field values of a second transaction, and an input. The second transaction is obtained.

Abstract: Disclosed herein is a computer-implemented method of managing sensitive information and the communication thereof. The method comprising: receiving, by a first server from a second server, first sensitive information relating to a user having an account with the second server; receiving, by the first server from a user device, second sensitive information via a data entry page hosted by the first server, wherein the data entry page is configured to receive second sensitive data associated with the user and the second sensitive information is different to the first sensitive information; and associating, by the first server, the first sensitive information with the second sensitive information. The first server and the second server communicate via a first communication channel and the first server and the user device communicate via a second, different communication channel.

Abstract: The invention relates to distributed ledge technologies such as consensus-based blockchains. The methods and systems of the present disclosure are provided for causing an injection of a serialized set of field values of an unlocking transaction into a locking script are described. The invention is implemented using a blockchain network, which may for example be a Bitcoin blockchain. A in first transaction to validate is received at a node in the blockchain network. The first transaction includes a first script that includes a set of field values of the first transaction and, as a result of being executed, causes the node to obtain a set of field values. A second transaction is obtained, with the second transaction having been validated. The second transaction includes a second script that, as a result of being executed, causes the node to generate a signature based at least in part on the set of field values supplied as a result of execution of the first script.

Abstract: The invention relates to distributed ledger technologies such as consensus-based blockchains. Computer-implemented methods for parameterized smart contracts are described. The invention is implemented using a blockchain network, which may be, for example, a Bitcoin blockchain. A first transaction is received at a node in a blockchain network to validate, with the first transaction including a first script that, as a result of being executed, causes the node to at least obtain data and a first set of field values of the first transaction. A second transaction is obtained, with the second transaction including a second script that, as a result of being executed, causes the node to at least determine, based at least in part on the data supplied as a result of execution of the first script, a set of constraints, and verify, based at least in part on the first set of field values, that the set of constraints are applicable to the first transaction.

Abstract: The invention relates to distributed ledger technologies such as consensus-based blockchains. Computer-implemented methods for a trustless, deterministic state machine are described. The invention is implemented using a blockchain network, which may be, for example, a Bitcoin blockchain. A first transaction to validate is received at a node in a blockchain network. The first transaction includes a first script that, as a result of being executed, causes the node to at least obtain a first set of field values of the first transaction, a second set of field values of a second transaction, and an input. The second transaction is obtained.