/pet-park-assignment

Post lecture assignment

Primary LanguageJavaScript

Pet Park

Goal

The goal of this exercise is to develop a pet park smart contract. The specification of the contract is described in this readme and by the tests at tests/PetPark.spec.js. Once you implement the contract correctly, all the tests should pass.

We can have 5 kinds of animals in our pet park

  • Fish (AnimalType: 1)
  • Cat (AnimalType: 2)
  • Dog (AnimalType: 3)
  • Rabbit (AnimalType: 4)
  • Parrot (AnimalType: 5)

Complete this contract with following specifications for each function

  • add

    • Takes Animal Type and Count. Gives shelter to animals in our park.
    • Only contract owner (address deploying the contract) should have access to this functionality.
    • Emit event Added with parameters Animal Type and Animal Count.

  • borrow

    • Takes Age, Gender and Animal Type.
    • Can borrow only one animal at a time. Use function giveBackAnimal to borrow another animal.
    • Men can borrow only Dog and Fish.
    • Women can borrow every kind, but women aged under 40 are not allowed to borrow a Cat.
    • Throw an error if an address has called this function before using other values for Gender and Age.
    • Emit event Borrowed with parameter Animal Type.

  • giveBackAnimal

    • Throw an error if user hasn't borrowed before.
    • Emit event Returned with parameter Animal Type.

Evaluation

  • Create a fork of this repo

  • Install all dependencies

    npm install

  • Make changes to the contract/PetPark.sol file. The tests in test/PetPark.spec.js should run successfully.

  • Run Tests

    npm test

  • Create a pull request from your forked repo to main branch of original repo to run the github workflow.

Note

  • The error strings (mentioned in revert statement) must be same as the ones mentioned in tests.
  • Use modifier where appropriate.