mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-23 00:18:00 +00:00
James Wilson
1e111ea9db
* Move Extrinsic decoding things to subxt_core and various tidy-ups * A couple more fixes and fmt * first pass moving tx logic to subxt_core * cargo fmt * fix wasm example * clippy * more clippy * WIP Adding examples and such * Move storage functionality more fully to subxt_core and nice examples for storage and txs * Add example for events * consistify how addresses/payloads are exposed in subxt-core and add runtime API fns * Add runtime API core example * fmt * remove scale-info patch * Add a little to the top level docs * swap args around * clippy * cargo fmt and fix wasm-example * doc fixes * no-std-ise new subxt-core additions * alloc, not core * more no-std fixes * A couple more fixes * Add back extrinsic decode test
36 lines
1.2 KiB
Rust
36 lines
1.2 KiB
Rust
#![allow(missing_docs)]
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use subxt::ext::codec::Decode;
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use subxt::metadata::Metadata;
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use subxt::utils::H256;
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use subxt::{config::PolkadotConfig, OfflineClient};
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#[tokio::main]
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async fn main() -> Result<(), Box<dyn std::error::Error>> {
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// We need to obtain the following details for an OfflineClient to be instantiated:
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// 1. Genesis hash (RPC call: chain_getBlockHash(0)):
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let genesis_hash = {
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let h = "91b171bb158e2d3848fa23a9f1c25182fb8e20313b2c1eb49219da7a70ce90c3";
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let bytes = hex::decode(h).unwrap();
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H256::from_slice(&bytes)
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};
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// 2. A runtime version (system_version constant on a Substrate node has these):
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let runtime_version = subxt::client::RuntimeVersion {
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spec_version: 9370,
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transaction_version: 20,
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};
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// 3. Metadata (I'll load it from the downloaded metadata, but you can use
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// `subxt metadata > file.scale` to download it):
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let metadata = {
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let bytes = std::fs::read("./artifacts/polkadot_metadata_small.scale").unwrap();
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Metadata::decode(&mut &*bytes).unwrap()
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};
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// Create an offline client using the details obtained above:
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let _api = OfflineClient::<PolkadotConfig>::new(genesis_hash, runtime_version, metadata);
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Ok(())
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}
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