vade-didcomm 0.3.0

DIDComm communication helper for vade
Documentation 
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use crate::{
    datatypes::MessageWithBody,
    protocols::{
        present_proof::{
            datatypes::{AckData, State, UserType},
            presentation::{get_current_state, save_state},
        },
        protocol::{generate_step_output, StepResult},
    },
};

/// Protocol handler for direction: `send`, type: `PRESENT_PROOF_PROTOCOL_URL/ack`
pub fn send_presentation_ack(_options: &str, message: &str) -> StepResult {
    let ack_message: MessageWithBody<AckData> = serde_json::from_str(message)?;
    let thid = ack_message
        .thid
        .as_ref()
        .ok_or("Thread id can't be empty")?;

    let current_state: State = get_current_state(thid, &UserType::Verifier)?.parse()?;

    match current_state {
        State::PresentationReceived => {
            save_state(thid, &State::Acknowledged, &UserType::Verifier)?
        }
        _ => {
            return Err(Box::from(format!(
                "Error while processing step: State from {} to {} not allowed",
                current_state,
                State::Acknowledged
            )))
        }
    }

    generate_step_output(&serde_json::to_string(&ack_message)?, "{}")
}

/// Protocol handler for direction: `receive`, type: `PRESENT_PROOF_PROTOCOL_URL/ack`
pub fn receive_presentation_ack(_options: &str, message: &str) -> StepResult {
    let ack_message: MessageWithBody<AckData> = serde_json::from_str(message)?;
    let thid = ack_message.thid.ok_or("Thread id can't be empty")?;

    let current_state: State = get_current_state(&thid, &UserType::Prover)?.parse()?;

    match current_state {
        State::PresentationSent => {
            save_state(&thid, &State::Acknowledged, &UserType::Prover)?;
        }
        _ => {
            return Err(Box::from(format!(
                "Error while processing step: State from {} to {} not allowed",
                current_state,
                State::Acknowledged
            )))
        }
    }

    generate_step_output(message, "{}")
}