mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-11 20:01:08 +00:00
James Wilson
3d669f97c6
* WIP extrinsic api updates * First pass done; now to get things compiling again * document and tweak new structs/traits * cargo check --all-targets now compiles without issue * Polkadot and Substrate take different extra params; support both * Fix transaction format (missing byte from AccountId -> Address) and fmt * Tweak Signer trait * Tweak comments and such in extrinsic params * check all examples against newer polkadot, add new one with params, import path tweaks * clippy fix, and save an allocation when signing * Remove unnecessary Default clauses * Tidy up and fix comments. Panic if payload size >4GB * fix typo
105 lines
3.7 KiB
Rust
105 lines
3.7 KiB
Rust
// Copyright 2019-2022 Parity Technologies (UK) Ltd.
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// This file is part of subxt.
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//
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// subxt is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// subxt is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with subxt. If not, see <http://www.gnu.org/licenses/>.
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//! To run this example, a local polkadot node should be running. Example verified against polkadot 0.9.18-f6d6ab005d-aarch64-macos.
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//!
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//! E.g.
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//! ```bash
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//! curl "https://github.com/paritytech/polkadot/releases/download/v0.9.13/polkadot" --output /usr/local/bin/polkadot --location
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//! polkadot --dev --tmp
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//! ```
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use futures::StreamExt;
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use sp_keyring::AccountKeyring;
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use std::time::Duration;
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use subxt::{
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ClientBuilder,
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DefaultConfig,
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PairSigner,
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PolkadotExtrinsicParams,
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};
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#[subxt::subxt(runtime_metadata_path = "examples/polkadot_metadata.scale")]
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pub mod polkadot {}
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/// Subscribe to all events, and then manually look through them and
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/// pluck out the events that we care about.
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#[async_std::main]
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async fn main() -> Result<(), Box<dyn std::error::Error>> {
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env_logger::init();
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// Subscribe to any events that occur:
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let api = ClientBuilder::new()
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.build()
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.await?
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.to_runtime_api::<polkadot::RuntimeApi<DefaultConfig, PolkadotExtrinsicParams<DefaultConfig>>>();
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// Subscribe to several balance related events. If we ask for more than one event,
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// we'll be given a correpsonding tuple of `Option`'s, with exactly one
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// variant populated each time.
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let mut balance_events = api.events().subscribe().await?.filter_events::<(
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polkadot::balances::events::Withdraw,
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polkadot::balances::events::Transfer,
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polkadot::balances::events::Deposit,
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)>();
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// While this subscription is active, we imagine some balance transfers are made somewhere else:
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async_std::task::spawn(async {
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let signer = PairSigner::new(AccountKeyring::Alice.pair());
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let api =
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ClientBuilder::new()
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.build()
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.await
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.unwrap()
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.to_runtime_api::<polkadot::RuntimeApi<
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DefaultConfig,
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PolkadotExtrinsicParams<DefaultConfig>,
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>>();
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// Make small balance transfers from Alice to Bob in a loop:
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loop {
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api.tx()
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.balances()
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.transfer(AccountKeyring::Bob.to_account_id().into(), 1_000_000_000)
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.sign_and_submit_default(&signer)
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.await
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.unwrap();
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async_std::task::sleep(Duration::from_secs(10)).await;
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}
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});
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// Our subscription will see all of the balance events we're filtering on:
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while let Some(ev) = balance_events.next().await {
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let event_details = ev?;
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let block_hash = event_details.block_hash;
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let event = event_details.event;
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println!("Event at {:?}:", block_hash);
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if let (Some(withdraw), _, _) = &event {
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println!(" Withdraw event: {withdraw:?}");
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}
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if let (_, Some(transfer), _) = &event {
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println!(" Transfer event: {transfer:?}");
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}
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if let (_, _, Some(deposit)) = &event {
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println!(" Deposit event: {deposit:?}");
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}
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}
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Ok(())
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}
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