Module payload 

RPC payload types with JSON/CBOR dual format support.

This module provides lightweight RPC request/response types and format negotiation based on HTTP headers:

• Content-Type: application/cbor for CBOR request bodies
• Content-Type: application/json (default) for JSON request bodies
• Accept: application/cbor for CBOR responses
• Accept: application/json (default) for JSON responses

Structs

Accept

Extracts the preferred response format from the Accept header.

AppError

A typed error that converts to an HTTP response via IntoResponse.

AppResponse

A response type that supports both JSON and CBOR serialization.

HeaderVals

Extracts a bearer token from the Authorization header and sharding id from the X-Shard header.

PayloadFormat

Request/response format pair derived from HTTP content negotiation headers.

RpcError

RPC error object.

RpcRequest

RPC request object.

RpcResponse

RPC response object.

Enums

ContentType

Content format for request/response payloads.

StringOr

A helper type that can represent either a raw string or a parsed value.