Update subxt requirement from 0.34 to 0.35

[dependabot]

Updates the requirements on subxt to permit the latest version.

Release notes

Sourced from subxt's releases.

v0.35.0

[0.35.0] - 2024-03-21

This release contains several fixes, adds no_std support to a couple of crates (subxt-signer and subxt-metadata) and introduces a few quality of life improvements, which I'll quickly cover:

Reworked light client (#1475)

This PR reworks the light client interface. The "basic" usage of connecting to a parachain now looks like this:

#[subxt::subxt(runtime_metadata_path = "../artifacts/polkadot_metadata_small.scale")]
pub mod polkadot {}
use subxt::lightclient::LightClient;
// Instantiate a light client with the Polkadot relay chain given its chain spec.
let (lightclient, polkadot_rpc) = LightClient::relay_chain(POLKADOT_SPEC)?;
// Connect the light client to some parachain by giving a chain spec for it.
let asset_hub_rpc = lightclient.parachain(ASSET_HUB_SPEC)?;
// Now, we can create Subxt clients from these Smoldot backed RPC clients:
let polkadot_api = OnlineClient::<PolkadotConfig>::from_rpc_client(polkadot_rpc).await?;
let asset_hub_api = OnlineClient::<PolkadotConfig>::from_rpc_client(asset_hub_rpc).await?;

This interface mirrors the requirement that we must connect to a relay chain before we can connect to a parachain. It also moves the light client specific logic into an RpcClientT implementation, rather than exposing it as a subxt::client::LightClient.

Typed Storage Keys (#1419)

This PR changes the storage interface so that, where possible, we now also decode the storage keys as well as the values when iterating over storage entries:

#[subxt::subxt(runtime_metadata_path = "../artifacts/polkadot_metadata_small.scale")]
pub mod polkadot {}
// Create a new API client, configured to talk to Polkadot nodes.
let api = OnlineClient::<PolkadotConfig>::new().await?;
// Build a storage query to iterate over account information.
let storage_query = polkadot::storage().system().account_iter();
// Get back an iterator of results (here, we are fetching 10 items at
// a time from the node, but we always iterate over one at a time).
let mut results = api.storage().at_latest().await?.iter(storage_query).await?;
while let Some(Ok(kv)) = results.next().await {
// We used to get a tuple of key bytes + value. Now we get back a
// kv struct containing the bytes and value as well as the actual
// decoded keys:
println!("Decoded key(s): {:?}", kv.keys);
</tr></table>

... (truncated)

Changelog

Sourced from subxt's changelog.

[0.35.0] - 2024-03-21

This release contains several fixes, adds no_std support to a couple of crates (subxt-signer and subxt-metadata) and introduces a few quality of life improvements, which I'll quickly cover:

Reworked light client (#1475)

This PR reworks the light client interface. The "basic" usage of connecting to a parachain now looks like this:

#[subxt::subxt(runtime_metadata_path = "../artifacts/polkadot_metadata_small.scale")]
pub mod polkadot {}
use subxt::lightclient::LightClient;
// Instantiate a light client with the Polkadot relay chain given its chain spec.
let (lightclient, polkadot_rpc) = LightClient::relay_chain(POLKADOT_SPEC)?;
// Connect the light client to some parachain by giving a chain spec for it.
let asset_hub_rpc = lightclient.parachain(ASSET_HUB_SPEC)?;
// Now, we can create Subxt clients from these Smoldot backed RPC clients:
let polkadot_api = OnlineClient::<PolkadotConfig>::from_rpc_client(polkadot_rpc).await?;
let asset_hub_api = OnlineClient::<PolkadotConfig>::from_rpc_client(asset_hub_rpc).await?;

This interface mirrors the requirement that we must connect to a relay chain before we can connect to a parachain. It also moves the light client specific logic into an RpcClientT implementation, rather than exposing it as a subxt::client::LightClient.

Typed Storage Keys (#1419)

This PR changes the storage interface so that, where possible, we now also decode the storage keys as well as the values when iterating over storage entries:

#[subxt::subxt(runtime_metadata_path = "../artifacts/polkadot_metadata_small.scale")]
pub mod polkadot {}
// Create a new API client, configured to talk to Polkadot nodes.
let api = OnlineClient::<PolkadotConfig>::new().await?;
// Build a storage query to iterate over account information.
let storage_query = polkadot::storage().system().account_iter();
// Get back an iterator of results (here, we are fetching 10 items at
// a time from the node, but we always iterate over one at a time).
let mut results = api.storage().at_latest().await?.iter(storage_query).await?;
while let Some(Ok(kv)) = results.next().await {
// We used to get a tuple of key bytes + value. Now we get back a
// kv struct containing the bytes and value as well as the actual
// decoded keys:
println!("Decoded key(s): {:?}", kv.keys);
println!("Key bytes: 0x{}", hex::encode(&kv.key_bytes));
</tr></table>

... (truncated)

Commits

• 9810406 Prep to release 0.35 (#1489)
• 852dab6 chore: bump sp-core, sp-runtime and sp-keyring (#1491)
• 98c4c01 chore: rename sp-core-hashing to sp-crypto-hashing (#1490)
• caa6b56 build(deps): bump wasm-bindgen-futures from 0.4.41 to 0.4.42 (#1483)
• 793da7e disable cargo doc for subxt-cli (#1486)
• f7108b9 build(deps): bump proc-macro2 from 1.0.78 to 1.0.79 (#1481)
• d908534 build(deps): bump color-eyre from 0.6.2 to 0.6.3 (#1482)
• f7ef0a9 build(deps): bump trybuild from 1.0.89 to 1.0.90 (#1485)
• 22e2796 Update Artifacts (auto-generated) (#1480)
• 64dbb6f build(deps): bump scale-info from 2.10.0 to 2.11.0 (#1484)
• Additional commits viewable in compare view

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[dependabot]

Superseded by #29.