challenge.yaml

name: floordrop
author: hpmv, orion
description: |
  Ever heard of airdrops? Well, we're doing a *floor*drop. We're dropping the flag on the floor. Go pick it up.

  This challenge happens on DiceChain, an Ethereum-compatible network started using go-ethereum with the genesis.json provided to you.
  You may start a challenge attempt at any time by connecting to the provided nc.

  During each challenge attempt,

  * The server will generate a challenge for you to solve and send a transaction that calls `setChallenge(the challenge)` on the ProofOfWork contract.
  * Two seconds later, the server will send another transaction that calls `expireChallenge()` on the same contract.
  * Your goal is to solve the challenge and submit the solution by calling `solveChallenge(the solution encoded in bigendian bytes, random nonce)`, before the challenge expires. A script to solve the challenge has been provided to you in `solve.py`.
  * If you submit the correct solution before the challenge expires, a flag will be printed in the same nc session.

  You're encouraged to use the mock challenge (menu option 1) to familiarize yourself with the challenge setup.
  Also, to help with your understanding, an example series of transactions that would yield a successful solve can be found in block [154](https://floordrop.hpmv.dev/block/154).

  Links:

  * Block explorer: [https://floordrop.hpmv.dev/](https://floordrop.hpmv.dev/)
  * RPC: https://floordrop-rpc.hpmv.dev/
  * Faucet: {{ link }} (use to get some free DICE!).
  * `{{ nc }}`
provide:
  - handouts/floordrop.zip
flag: dice{fr0ntrunn1ng_1s_n0t_ju5t_f0r_s4ndw1ch1ng_f8d9f834}
containers:
  mongo:
    build:
      context: .
      dockerfile: docker/Dockerfile-mongo
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: 579wFjds0AQ8374z4TRyjQr
    ports:
      - 27017
    resources:
      limits:
        cpu: 200m
        memory: 200Mi
      requests:
        cpu: 200m
        memory: 200Mi
  daemon:
    build:
      context: .
      dockerfile: docker/Dockerfile-daemon
    environment:
      MONGODB_URI: mongodb://root:579wFjds0AQ8374z4TRyjQr@mongo:27017
      DESIRED_ACCOUNTS: "1000"
      FAUCET_KEY: '0x14ec0a7bb2781d36b3dc73a101fd9fd1f5a6d0f3a58bc7dda74e54032d23a35a'
    ports:
      - 32124  # not used
    resources:
      limits:
        cpu: 100m
        memory: 200Mi
      requests:
        cpu: 100m
        memory: 200Mi
  chal:
    build:
      context: .
      dockerfile: docker/Dockerfile-chal
    securityContext:
      privileged: true
    environment:
      JAIL_ENV_MONGODB_URI: mongodb://root:579wFjds0AQ8374z4TRyjQr@mongo:27017
    ports:
      - 5000
    resources:
      limits:
        cpu: 16000m
        memory: 4Gi
      requests:
        cpu: 200m
        memory: 500Mi
  ui:
    build:
      context: .
      dockerfile: docker/Dockerfile-ui
    environment:
      MONGODB_URI: mongodb://root:579wFjds0AQ8374z4TRyjQr@mongo:27017
    ports:
      - 8501
    resources:
      limits:
        cpu: 1000m
        memory: 500Mi
      requests:
        cpu: 200m
        memory: 200Mi
expose:
  chal:
  - target: 5000
    tcp: 32123
    healthContent: "Welcome to Floordrop"
  ui:
  - target: 8501
    http: floordrop-faucet
sortWeight: 10