feat: add serde impls to Blob and Bytes48

[Rjected]

This adds serde Serialize and Deserialize implementations that work with a 0x prefix.

[asn-d6]

Hey. Can you tell us why you need the serde impls and the from_hex() is not sufficient for your needs? Is it just for testing purposes?

[Rjected]

Hey. Can you tell us why you need the serde impls and the from_hex() is not sufficient for your needs? Is it just for testing purposes?

I'd like to use Blob and Bytes48 in other types in reth and not have to write a manual Serialize or Deserialize impl for these higher level types, for example using this branch lets us derive here:
https://github.com/paradigmxyz/reth/blob/bfa130d1875f1e1510e181e09fced33578d70563/crates/primitives/src/transaction/eip4844.rs#L547-L557

We provide these traits on almost all basic types so it's possible for API consumers to use the serde ecosystem in their own applications. With the serde impl, it would also become possible to use these types directly for RPC serialization instead of requiring conversion to another type that uses Bytes:
https://github.com/paradigmxyz/reth/blob/bfa130d1875f1e1510e181e09fced33578d70563/crates/rpc/rpc-types/src/eth/engine/payload.rs#L215-L221

[jtraglia]

Makes sense. For completeness, could we add serde impls for Bytes32 too?

[Rjected]

Makes sense. For completeness, could we add serde impls for Bytes32 too?

just added!

[jtraglia]

Great. Thanks for adding that. LGTM 👍

[asn-d6]

Thanks!