Contract events: publisher

Focus: one price publisher entry that emits a contract event for listeners.

Open in Playground 

const PRICE_EVENT: u64 = 100
 
entry publish_price(symbol: string, price: u64) {
    emit_event(PRICE_EVENT, [symbol, price])
    return 0
}

How it works

• PRICE_EVENT is the event id that other contracts will subscribe to.
• emit_event(PRICE_EVENT, [...]) sends positional event data to contract listeners.
• The same event id and payload shape are used by the listener in the next example.
• The entry returns the default success exit code after publishing the event.

Deploy this first, then pass its contract hash to the listener in the next example.