______   ______   ______   ______   ______   ______   ______   ______   
/_____/  /_____/  /_____/  /_____/  /_____/  /_____/  /_____/  /_____/   
/_____/  /_____/  /_____/  /_____/  /_____/  /_____/  /_____/  /_____/   
                                                                         
                                                                         
              .__                         __    __                 __    
_______   ____ |  | _____  ___.__. _____ _/  |__/  |______    ____ |  | __
\_  __ \_/ __ \|  | \__  \<   |  | \__  \\   __\   __\__  \ _/ ___\|  |/ /
|  | \/\  ___/|  |__/ __ \\___  |  / __ \|  |  |  |  / __ \\  \___|    < 
|__|    \___  >____(____  / ____| (____  /__|  |__| (____  /\___  >__|_ \
            \/          \/\/           \/                \/     \/     \/
                                                                         
 ______   ______   ______   ______   ______   ______   ______   ______   
/_____/  /_____/  /_____/  /_____/  /_____/  /_____/  /_____/  /_____/   
/____/  /_____/  /_____/  /_____/  /_____/  /_____/  /_____/  /_____/   
                                                                         

Relay Attack

You BTC Relay is broken!

Fix the bugs and defend yourself against incoming attacks!

May the best team survive....

(HINT: you have to add the correct 'require' statements!)

Interested? Read up on cross-chain communication our paper: https://eprint.iacr.org/2019/1128.pdf

Instructions

Quick

Execute the install shell script with:

./install

Start the game with:

./play

Long

Install ganache-cli and truffle globally using:

npm install -g ganache-cli truffle

Install local npm packages from this folder with:

npm install

Install the Python requirements with:

pip3 install --user -r requirements.txt

Open a new terminal and start a local ganache-cli server to test your solutions:

ganache-cli

Start the game in a different terminal window with:

python3 play.py

Register

The game will ask you to register a team name. You can re-use your team name and the server will return you your previous team id.

Our script will update your local config file - so, you only need to register once and you are good to go!

Teams

If you work in a team, you have the following options:

• Use the same team name when registering on multiple machines

OR

• Use the same machine and do pair-programming

Commands

The game has three commands:

• test: runs tests locally on your machine. Use this to test you solutions locally, before submitting.
• submit: Submits your solution to our game server
• help: Local help (just info on commands)
• hint: Ask for a HINT for a specific testcase. NOTE: you will only get 50% of the points for this testcase after this!
• quit: Surrender...