[Rust SDK] block fetching

[0xmemorygrinder]

🐛 Bug

I use the aptos rust sdk to fetch a block at a specific height. Everything works fine for various blocks, however I get a parse error on this height : 261400138.

I manually downloaded the block from the rpc and evrything seems good.
I tried with various RPCs, to be sure the problem was not linked to this.

The issue seems to be a field that is optional but not marked as it for serde.

To reproduce

Code snippet to reproduce

let block = self.rest_client.get_block_by_height(261400138, true).await?;

Stack trace/error message

RestClientError(Unknown(error decoding response body: missing field type at line 1 column 109135))

Expected Behavior

The block should be parsed and usable as others.

System information

Please complete the following information:

• Aptos Core Version : devnet branch
• Rust Version: 1.81
• Computer OS: ubuntu