mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-25 15:17:57 +00:00
James Wilson
d7124b56f7
* WIP backend trait * WIP converting higher level stuff to using Backend impl * more implementing new backend trait, mainly storage focused * Get core code compiling with new backend bits * subxt crate checks passing * fix tests * cargo fmt * clippy/fixes * merging and other fixes * fix test * fix lightclient code * Fix some broken doc links * another book link fix * fix broken test when moving default_rpc_client * fix dry_run test * fix more tests; lightclient and wasm * fix wasm tests * fix some doc examples * use next() instead of next_item() * missing next_item() -> next()s * move legacy RPc methods to LegacyRpcMethods type to host generic param instead of RpcClient * standardise on all RpcClient types prefixed with Rpc, and 'raw' trait types prefixed with RawRpc so it's less ocnfusing which is which * rename fixes * doc fixes * Add back system_dryRun RPC method and rename tx.dry_run() to tx.validate(), to signal that the calls are different * Add a test that we return the correct extrinsic hash from submit() * add TransactionValid details back, and protect against out of range bytes * add test for decoding transaction validation from empty bytes * fix clippy warning
35 lines
1.2 KiB
Rust
35 lines
1.2 KiB
Rust
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::backend::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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