holochain_core 0.0.52-alpha2

use crate::action::ValidationKey;

use holochain_json_api::{error::JsonError, json::JsonString};

use holochain_core_types::validation::ValidationPackage;

/// This is direct message that got created by the zome code through hdk::send().
#[derive(Serialize, Deserialize, Clone, PartialEq, Debug, DefaultJson)]
pub struct CustomDirectMessage {
    /// We have to track which zome sent the message so we can call the
    /// receive callback of the same zome on the receiving side.
    pub zome: String,

    /// The payload that the zome sends.
    /// This is a result to enable the receive handler to return an error
    pub payload: Result<String, String>,
}

/// These are the different kinds of (low-level, i.e. non-app)
/// node-to-node messages that can be send between Holochain nodes.
#[derive(Serialize, Deserialize, Clone, PartialEq, Debug, DefaultJson)]
#[allow(clippy::large_enum_variant)]
pub enum DirectMessage {
    /// A custom direct message is something that gets triggered
    /// from zome code, i.e. from the app.
    /// Receiving such a messages triggers a WASM callback
    Custom(CustomDirectMessage),

    /// This message is used to ask another node (which needs to
    /// be the author) for the validation package of a given entry.
    RequestValidationPackage(ValidationKey),

    /// With this message an author is responding to a
    /// RequestValidationPackage message.
    /// Option<> since there has to be a way to respond saying
    /// "I can't"
    ValidationPackage(Option<ValidationPackage>),
}