witnet / protobuf-convert Goto Github PK

It's no secret that failure actually deprecated because it have a fundamental flaws in the desigin.

In Exonum we replace failure by the anyhow crate, but now we need to write tricky code like this to use anyhow with the protobuf-convert derive.

https://github.com/exonum/exonum/blob/master/services/supervisor/src/proto_structures.rs#L15

In my opinion there are no any arguments against switching to anyhow.

If you agree I will make the corresponding PR to switch codegen to the anyhow.

Some data structures may at some times have computed or cached fields that are supposed not to be sent over the wire nor otherwise affect serialization.

For this feature to be supported, I'd expect protobuf-convert macro to allow specifying fields that will be ignored, i.e. they will not be matched to any field in the schema.

This is an example of what this could look like: (taken from witnet-rust)

/// Transaction data structure
#[derive(Debug, Default, Eq, PartialEq, Clone, Serialize, Deserialize, ProtobufConvert)]
#[protobuf_convert(pb = "witnet::TransactionBody")]
pub struct TransactionBody {
    pub version: u32,
    pub inputs: Vec<Input>,
    pub outputs: Vec<Output>,
    #[protobuf_convert(skip)]
    hash: Cell<Option<Hash>>,
}