Squink Splash: Advanced

Helpful Resources

• ink! Documenation Portal
• ink! Examples

How to test locally

1. cargo contract build --release your player and game contract
2. Upload player and game
3. Call game.register_player
4. Call game.start_game
5. Open https://splash.use.ink
6. Call game.submit_turn

Cross-contract Calls

use ink::env::{
    DefaultEnvironment,
    call::{build_call, Selector, ExecutionInput},
};

let board: (u32, u32) = build_call::<DefaultEnvironment>()
     .call(game_addr)
     .exec_input(
         ExecutionInput::new(Selector::new(0xf10dee95_u32.to_be_bytes()))
     )
     .returns::<(u32, u32)>()
     .invoke();

The documentation of build_call contains more details.

cargo-contract Commands

Registering a player

export CONTRACT=5E123… # your player contract address

cargo contract call\
    --url wss://contracts.theissen.io\
    --suri "$SURI"\
    --skip-dry-run\
    --gas 300000000000\
    --proof-size 512000\
    --contract "$GAME"\
    --message register_player\
    --args "$CONTRACT" \"playername\"\
    --skip-confirm\
    game-metadata.json

Starting the game

export SURI="your twelve words"
export GAME=5E123… # your game contract address

cargo contract call\
    --url wss://rococo-contracts-rpc.polkadot.io\
    --suri "$SURI"\
    --contract $GAME\
    --message "start_game"\
    --skip-confirm\
    game-metadata.json

Submitting a turn

export SURI="your twelve words"
export GAME=5E123… # your game contract address

cargo contract call\
    --url wss://rococo-contracts-rpc.polkadot.io\
    --suri "$SURI"\
    --contract $GAME\
    --message "submit_turn"\
    --skip-dry-run\
    --gas 300000000000\
    --proof-size 912000\
    --skip-confirm\
    game-metadata.json

Reading information

export SURI="your twelve words"
export GAME=5E123… # your game contract address

cargo contract call\
    --url wss://rococo-contracts-rpc.polkadot.io\
    --contract $GAME\
    --message "gas_limit"\
    --dry-run game-metadata.json\
    game-metadata.json