In-script functions within a blockchain transaction

A non-transitory computer-readable storage medium storing computer program code configured, when run on a node of a blockchain network to causes the node to perform a method of:

• a script engine of the node executing a first transaction of a blockchain, wherein the first transaction comprises at least one output comprising a locking script, wherein the locking script comprises an instance of a first opcode and multiple instances of a same second opcode, each instance of the same second opcode separating portions of the locking script, wherein the script engine comprises a script interpreter that is configured to execute scripts by interpreting parts of the script as data elements, and wherein the node of the blockchain network is configured to:
• upon calling the instance of the first opcode, the script engine of the node reading a first data element of the data elements, from at least one stack, wherein the first data element is generated during execution of the locking script with an unlocking script of a second, different transaction;
• the script engine outputting a first part of the locking script that follows an instance of the second opcode corresponding to the first data element, and
• executing, by the node of the blockchain network, at least some of the first part of the locking script outputted by the script engine.

A computing equipment, comprising:

• a memory comprising one or more memory-partitions;
• and
• a processing apparatus comprising one or more processors, wherein the memory stores code arranged to run on the processing apparatus, the code being configured when run on the processing apparatus to causes the processing apparatus to carry out a method of executing a first transaction of a blockchain, wherein the first transaction comprises at least one output comprising a locking script, wherein the locking script comprises an instance of a first opcode and multiple instances of a same second opcode, each instance of the same second opcode separating portions of the locking script, and wherein the processing apparatus being configured to:
• upon calling the instance of the first opcode, a script engine comprises a script interpreter that is configured to execute scripts by interpreting parts of the script as data elements, the script engine of the node reading a first as data element of the data elements from at least one stack, wherein the first data element is generated during execution of the locking script with an unlocking script of a second, different transaction;
• the script engine outputting a first part of the locking script that follows an instance of the second opcode corresponding to the first data element, and
• executing, by the node of the blockchain network, at least some of the first part of the locking script outputted by the script engine.