Nine Lives is a smart contract built on top of Crypto Kitties which allows users to battle their kitties with real stakes at hand. Kitties start with 9 lives, and users battle to earn kitty tokens to buy accessories and customize their cats. However, once a kitty uses its last life, it dies forever (by being sent to 0x0). Nine Lives tackles the increasing problem of overpopulation and unwanted kitties by pitting them against each other in fights to the death! Users are incentivized to battle with their unwanted kitties so they can purchase accessories for the kitties they hold closest to their hearts. Kittys are “spawned” through the Nine Lives contract, and a spawn price is modifiable (could be 0). Once a kitty has been spawned, it cannot regain lives it has lost. The arena contract does not need to know the mechanics of battling, just the address of the battle contract which returns the winning kitty.

Install dependencies:

npm i
npm install -g truffle
npm install -g ganache-cli

Open a new Terminal. Compile the contract:

truffle compile

Start local ethereum blockchain

ganache-cli <options>

To deploy the smart contract on the development network, run:

truffle migrate --network development

Tests framework is mocha. Run tests with:

truffle test

Copyright (c) 2018 Alejandro Munoz

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.