Replacement of [Referendum #11](https://kusama.polkassembly.io/referenda/11)

The substrate-api-client is a Rust-library for connecting to a substrate-based node via RPC. It is an alternative to subxt, which provides a similar functionality. RPC clients are needed in any software component, connecting to a substrate parachain. Therefore it is advisable, that there is more than one client available for Rust developers. Apart from that, the substrate-api-client fills a gap, providing the possibility to create extrinsics in a no_std-environment. Thereby facilitating extrinsic creation from within trusted hardware (like Intel sgx). This has a big potential for further usage in IoT environments. Last but not least, the substrate-api-client has an easy-to-use interface and comes with many practical examples, which makes it a good option for new developers.

This proposal aims to fund:

1. maintenance and support for the substrate api client over 3 months (Nov-22 until Jan-23).

2. evaluation and design of two new features:
     - CLI-wallet implementation
     - full no_std-compatibility

See the [discussion](https://kusama.polkassembly.io/post/1923) and our [full proposal](https://docs.google.com/document/d/1hJzzmimz_pjK-_4TunKvs-i2Zot2_9Ob3qUr7BlzaNo/edit?usp=sharing) for the details.


- The proposal is about replacing a previous referendum.
- It is about funding the maintenance and support of a Rust-library called substrate-api-client.
- The library helps connect to a substrate-based node via RPC and allows for creating extrinsics in a no_std-environment.
- The proposal also includes evaluating and designing two new features: a CLI-wallet implementation and full no_std-compatibility.
- There is a discussion and a full proposal document for more details.

#237 [Replacement of Referendum #11] Treasury Proposal: Maintenance for the substrate-api-client Nov-22 to Jan-23

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