Blockchain-implemented method and system

A computer-implemented control method comprising:

• providing a blockchain transaction comprising a redeem script for an output, wherein the redeem script comprises:
• i) a plurality of input parameters, wherein each input parameter is uniquely associated with a respective one of a plurality of potential states of at least one data source supplied to an unlocking script of a further transaction arranged to spend the output, wherein each of the plurality of potential states of each of the at least one data source is represented by a signing key corresponding to a public key that represents a Boolean value indicative of the potential state;
• ii) at least one target output parameter defining a desired outcome to be met to spend the output of the blockchain transaction, wherein the at least one target output parameter represents a Boolean value;
• and
• iii) true/false logic arranged to provide a result based on:
• a calculation performed on the plurality of input parameters provided by the unlocking script to provide an interim result;
• a comparison of the at least one target output parameter via the unlocking script against the interim result;
• and
• spending the output, wherein spending the output comprises:
• attempting to spend the output more than once via the true/false logic, each attempt applying a different value of the target output parameter, wherein the potential state of the at least one data source is associated with the Boolean value corresponding to a value associated with one or more conditions being detected by a sensor, wherein the sensor generates and transmits the value to a computing resource and/or agent in response to the one or more conditions being detected, and wherein the computing resource and/or agent determines and provides the input parameters based at least in part on the value associated with the one or more conditions being detected by the sensor, the plurality of input parameters comprising the signing keys respectively representative of the potential states of a respective one of the at least one data source based on the one or more conditions detected by the sensor.