This runner showcases a server backend which orchestrates multiple channels, backend represents the responder.
As a reference a simple coin-toss game is showcased. A reference client acting as the initiator can be found here
Alternatively the game can be played using the the interactive client, make sure to obey the rules of the game which is described below.
The game logic itself is implemented here
Short description, steps marked with (*) require co-signing, that is; signature by both participants
1. channel is opened (*)
2. backend provides contract (*)
3. player provides a stake N tokens and a hash `compute_hash` based on guess which is heads|tails, and the secret key (salt) (*)
4. backend makes a coin_side guess with `casino_pick` and also provides N tokens to be able to participate (*)
5. client reveals `reveal` by providing key (salt) and the selected coin_side, tokens are now redistributed (*)
6. goto 3 ( ) or shutdown (*) which return tokens on-chain
If the client initiator refuses to reveal, a fp_timer also present in the game logic file will kick in starting a force progress. In this way the backend ensures that it is able to retrive it's tokens.
In order to test specific scenarios the backend behaviour can be configured with the following parameters:
TOSS_MODE="random|tails|heads" GAME_MODE="fair|malicious" FORCE_PROGRESS_HEIGHT="15|any_positive_integer"
MINE_RATE="180000|any_positive_integer"
AE_NODE_URL="wss://testnet.aeternity.io:443/channel" AE_NODE_NETWORK_ID="ae_uat" iex -S mix phx.server