Update subxt requirement from 0.29.0 to 0.30.0

[dependabot]

Updates the requirements on subxt to permit the latest version.

Release notes

Sourced from subxt's releases.

v0.30.0

[0.30.0] - 2023-07-24

This release beings with it a number of exciting additions. Let's cover a few of the most significant ones:

Light client support (unstable)

This release adds support for light clients using Smoldot, both when compiling native binaries and when compiling to WASM to run in a browser environment. This is unstable for now while we continue testing it and work on making use of the new RPC APIs.

Here's how to use it:

use subxt::{
    client::{LightClient, LightClientBuilder},
    PolkadotConfig
};
use subxt_signer::sr25519::dev;
// Create a light client:
let api = LightClient::<PolkadotConfig>::builder()
// You can also pass a chain spec directly using build, which is preferred:
.build_from_url("ws://127.0.0.1:9944")
.await?;
// Working with the interface is then the same as before:
let dest = dev::bob().public_key().into();
let balance_transfer_tx = polkadot::tx().balances().transfer(dest, 10_000);
let events = api
.tx()
.sign_and_submit_then_watch_default(&balance_transfer_tx, &dev::alice())
.await?
.wait_for_finalized_success()
.await?;

At the moment you may encounter certain things that don't work; please file an issue if you do!

V15 Metadata

This release stabilizes the metadata V15 interface, which brings a few changes but primarily allows you to interact with Runtime APIs via an ergonomic Subxt interface:

// We can use the static interface to interact in a type safe way:
#[subxt::subxt(runtime_metadata_path = "path/to/metadata.scale")]
pub mod polkadot {}
let runtime_call = polkadot::apis()
.metadata()
.metadata_versions();
</tr></table>

... (truncated)

Changelog

Sourced from subxt's changelog.

[0.30.0] - 2023-07-24

This release beings with it a number of exciting additions. Let's cover a few of the most significant ones:

Light client support (unstable)

This release adds support for light clients using Smoldot, both when compiling native binaries and when compiling to WASM to run in a browser environment. This is unstable for now while we continue testing it and work on making use of the new RPC APIs.

Here's how to use it:

use subxt::{
    client::{LightClient, LightClientBuilder},
    PolkadotConfig
};
use subxt_signer::sr25519::dev;
// Create a light client:
let api = LightClient::<PolkadotConfig>::builder()
// You can also pass a chain spec directly using build, which is preferred:
.build_from_url("ws://127.0.0.1:9944")
.await?;
// Working with the interface is then the same as before:
let dest = dev::bob().public_key().into();
let balance_transfer_tx = polkadot::tx().balances().transfer(dest, 10_000);
let events = api
.tx()
.sign_and_submit_then_watch_default(&balance_transfer_tx, &dev::alice())
.await?
.wait_for_finalized_success()
.await?;

At the moment you may encounter certain things that don't work; please file an issue if you do!

V15 Metadata

This release stabilizes the metadata V15 interface, which brings a few changes but primarily allows you to interact with Runtime APIs via an ergonomic Subxt interface:

// We can use the static interface to interact in a type safe way:
#[subxt::subxt(runtime_metadata_path = "path/to/metadata.scale")]
pub mod polkadot {}
let runtime_call = polkadot::apis()
.metadata()
.metadata_versions();
// Or we can use the dynamic interface like so:
</tr></table>

... (truncated)

Commits

• 44b1690 Fixes to make release work (#1090)
• c66cbe7 Prep for 0.30 release (#1089)
• e6a703e Bump serde_json from 1.0.100 to 1.0.103 (#1086)
• 770483d Add LightClient::builder() (#1088)
• 560432b chainHead: Adjust chainHead_storage api (#1087)
• 6c8d878 Remove substrate-compat default feature flag (#1078)
• 8b23b2b Example: How to connect to parachain (#1043)
• fd8f60c runtime API: Substitute UncheckedExtrinsic with custom encoding (#1076)
• c2875de Remove Index type from Config trait (#1074)
• 475a141 Prevent bug when reusing type ids in hashing (#1075)
• Additional commits viewable in compare view

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[ascjones]

Superseded by #1855.

@dependabot ignore this minor version

[dependabot]

OK, I won't notify you about version 0.30.x again, unless you re-open this PR. 😢