Securing blockchain transaction based on undetermined data

A non-transitory computer readable storage medium comprising computer-executable instructions that, when executed, configure a processor to perform the method of:

• including, by a node in a blockchain network, a locking script in a blockchain transaction to lock a digital asset associated with the blockchain transaction, the locking script including a public key for a determined data source, wherein the determined data source provides data that was unknown at the time a previous blockchain transaction was created, and including instructions to cause a validating node executing the locking script to verify that the determined data source is the source of data that was previously unknown and that is provided in an unlocking script of the blockchain transaction by:
• a) generating a modified public key based on the public key for the determined data source and based on data defined in the unlocking script;
• and b) evaluating a cryptographic signature in the unlocking script based on the modified public key;
• sending, by the node, the blockchain transaction to the blockchain network;
• wherein the locking script further defines one or more data constraints and wherein the locking script further includes instructions to cause the validating node to invalidate a blockchain transaction that includes the unlocking script when the one or more data constraints are not satisfied by the data;
• and
• wherein the one or more data constraints define one or more values and a comparison function that performs a comparison based on the data and the one or more values.

An electronic device comprising:

• an interface device;
• a processor coupled to the interface device;
• and
• a memory coupled to the processor, the memory having stored thereon computer executable instructions that, when executed, configure the processor to perform the method of:
• including, by a node in a blockchain network, a locking script in a blockchain transaction to lock a digital asset associated with the blockchain transaction, the locking script including a public key for a determined data source, wherein the determined data source provides data that was unknown at the time a previous blockchain transaction was created, and including instructions to cause a validating node executing the locking script to verify that the determined data source is the source of data that was previously unknown and that is provided in an unlocking script of the blockchain transaction by:
• a) generating a modified public key based on the public key for the determined data source and based on data defined in the unlocking script;
• and b) evaluating a cryptographic signature in the unlocking script based on the modified public key;
• and sending, by the node, the blockchain transaction to the blockchain network;
• wherein the locking script further defines one or more data constraints and wherein the locking script further includes instructions to cause the validating node to invalidate a blockchain transaction that includes the unlocking script when the one or more data constraints are not satisfied by the data;
• and
• wherein the one or more data constraints define one or more values and a comparison function that performs a comparison based on the data and the one or more values.

A computer-implemented method comprising:

• generating, by a node, a modified private key based on data that was previously unknown at a time a previous transaction was generated and a private key;
• generating a cryptographic signature for a blockchain transaction referencing digital assets locked by a locking script using the modified private key;
• adding the cryptographic signature and the data to the blockchain transaction;
• and communicating the blockchain transaction to another node;
• wherein the locking script specifies a public key for a determined data source and includes instructions to cause a validating node executing the locking script to evaluate a source of data provided in an unlocking script by:
• a) generating a modified public key based on the public key for the determined data source and based on data defined in the unlocking script;
• and b) evaluating a cryptographic signature in the unlocking script based on the modified public key;
• wherein the locking script further defines one or more data constraints and wherein the locking script further includes instructions to cause the validating node to invalidate a blockchain transaction that includes the unlocking script when the one or more data constraints are not satisfied by the data;
• and
• wherein the one or more data constraints define one or more values and a comparison function that performs a comparison based on the data and the one or more values.