pezkuwi-subxt/subxt/examples/events.rs

#![allow(missing_docs)]
use pezkuwi_subxt::{OnlineClient, PezkuwiConfig};

#[pezkuwi_subxt::subxt(runtime_metadata_path = "../artifacts/pezkuwi_metadata_small.scale")]
pub mod pezkuwi {}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
	// Create a client to use:
	let api = OnlineClient::<PezkuwiConfig>::new().await?;

	// Get events for the latest block:
	let events = api.events().at_latest().await?;

	// We can dynamically decode events:
	println!("Dynamic event details:");
	for event in events.iter() {
		let event = event?;

		let pallet = event.pallet_name();
		let variant = event.variant_name();
		let field_values = event.decode_as_fields::<scale_value::Value>()?;

		println!("{pallet}::{variant}: {field_values}");
	}

	// Or we can attempt to statically decode them into the root Event type:
	println!("Static event details:");
	for event in events.iter() {
		let event = event?;

		if let Ok(ev) = event.as_root_event::<pezkuwi::Event>() {
			println!("{ev:?}");
		} else {
			println!("<Cannot decode event>");
		}
	}

	// Or we can look for specific events which match our statically defined ones:
	let transfer_event = events.find_first::<pezkuwi::balances::events::Transfer>()?;
	if let Some(ev) = transfer_event {
		println!("  - Balance transfer success: value: {:?}", ev.amount);
	} else {
		println!("  - No balance transfer event found in this block");
	}

	Ok(())
}