pezkuwichain
2779266f3b
- Fix rebrand issues in pezkuwi-subxt signer (sp_core -> pezsp_core, sp_keyring -> pezsp_keyring, sp_runtime -> pezsp_runtime) - Fix pezkuwi-zombienet-sdk tests (subxt::PolkadotConfig -> pezkuwi_subxt::PezkuwiConfig) - Correct artifact paths in subxt examples (polkadot_metadata_*.scale) - Fix type conversion issues in subxt examples (explicit constructors instead of .into() for generated types) - Add pezkuwi-subxt-utils-stripmetadata dev-dependency to metadata crate - Use original polkadot module from external frame-decode crate - Fix Display trait usage for generated AccountId32 types
40 lines
1.1 KiB
Rust
40 lines
1.1 KiB
Rust
//! Example to utilize the ChainHeadBackend rpc backend to subscribe to finalized blocks.
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#![allow(missing_docs)]
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use futures::StreamExt;
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use pezkuwi_subxt::{
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backend::{
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chain_head::{ChainHeadBackend, ChainHeadBackendBuilder},
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rpc::RpcClient,
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},
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OnlineClient, PezkuwiConfig,
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};
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// Generate an interface that we can use from the node's metadata.
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#[pezkuwi_subxt::subxt(runtime_metadata_path = "../artifacts/polkadot_metadata_small.scale")]
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pub mod pezkuwi {}
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#[tokio::main]
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async fn main() -> Result<(), Box<dyn std::error::Error>> {
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tracing_subscriber::fmt::init();
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let rpc = RpcClient::from_url("ws://localhost:9944".to_string()).await?;
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let backend: ChainHeadBackend<PezkuwiConfig> =
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ChainHeadBackendBuilder::default().build_with_background_driver(rpc.clone());
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let api = OnlineClient::from_backend(std::sync::Arc::new(backend)).await?;
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let mut blocks_sub = api.blocks().subscribe_finalized().await?.take(100);
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while let Some(block) = blocks_sub.next().await {
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let block = block?;
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let block_number = block.number();
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let block_hash = block.hash();
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println!("Block #{block_number} ({block_hash})");
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}
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Ok(())
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}
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