Example chaincodes

Description

This repo contains two example chaincodes (sensors and global) that are used as a part of the development process.

Global

Global chaincode is used to store topology data on the Hyperledger Fabric blockchain.

Methods

• initLedger(identifier, initialState): Invoked when the ledger is initialized. identifier should be unique and initialState is the first topology in JSON format.
• insert(identifier, newState): Invoked when the topology has been modified. Stores the new topology on the blockchain. identifier is unique and newState is the new topology in JSON format.
• delete(identifier): Deletes the topology related to the unique identifier.
• query(identifier): Fetch the latest topology related to the unique identifier

Sensors

Sensors chaincode is used to store sensor data on the Hyperledger Fabric Blockchain.

Methods

• querySensor(sensorId): Returns the latest stored data from sensorId.
• initLedger(owner): Initializes a dummy sensors when the ledger is initialized. owner is the owner of the sensor.
• createSensor(sensorId, owner, make, model): Creates a new sensor on the blockchain. sensorId should be unique, owner is the owner of the sensors, make and model are related to sensor's type.
• queryAllSensors(): Returns latest data from all available sensors.
• changeSensorValue(sensorId, newData): Stores new sensor data on the blockchain.