We will create a network to track postal parcels using Hyperledger Fabric. Hyperledger Fabric is a modular blockchain framework. It revolves around a few key concepts. First, the notion of channel, which represents a network with a set of transactions and participants dedicated to the same business objective. Within a channel a transaction is validated by a set of designated peers. On this channel, Smart Contracts can be deployed as "chaincode" to define business logic that will control validation within this network.
### Instruction
Network:
- Deploy a Hyperledger Fabric networks with one channel "PostalServices", two peers representing different cities ("Nairobi" and "Atlanta") belonging to the same organization and a third node "Singapore" belonging to another organization, an ordering node and two certificate authorities.
Objects:
- Define the following element of our postal network:
- 'Parcels', of type assets, which include a destination (a string), a current address (a string) and a status
- 'Transport' a transaction which allows the address of the parcel to be changed a package
Functionalities:
- Allow the creation of users, postal employees, that can create and modify parcels.
- Enable tracking of the status of the parcel: Good, Damaged or Destroyed. The state is saved in the package and a transaction allows this state to be modified. The transaction verifies that changes are consistent (state can go only one way... )
- Distribution, travel from the sorting center to the final address emits an event “Distribution”
Interface and deliverable
- Provide a README file and necessary script to allow the deployment of the network.
- Provide a command line interface with
-`create-user`, a command to create a user
-`create-parcel` a command to create a parcel
-`transport` a command to modify the address of a parcel
-`change status`that can potentially change its status.
