vade-didcomm 0.3.0

DIDComm communication helper for vade
Documentation 
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use crate::protocols::{
    issue_credential::{
        credential::{get_current_state, save_state},
        datatypes::{Ack, State, UserType},
    },
    protocol::{generate_step_output, StepResult},
};

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

    let current_state: State = get_current_state(thid, &parsed_message.body.user_type)?.parse()?;

    match current_state {
        State::ReceiveIssueCredential => {
            save_state(thid, &State::Acknowledged, &parsed_message.body.user_type)?
        }
        _ => {
            return Err(Box::from(format!(
                "State from {} to {} not allowed",
                current_state,
                State::Acknowledged
            )))
        }
    };

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

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

    if !matches!(&parsed_message.body.user_type, UserType::Holder) {
        return Err(Box::from(
            "ACK for step 'done' message must be sent from Holder".to_string(),
        ));
    }
    let current_user_type = UserType::Issuer;

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

    match current_state {
        State::SendIssueCredential => {
            save_state(&thid, &State::Acknowledged, &parsed_message.body.user_type)?
        }
        _ => {
            return Err(Box::from(format!(
                "State from {} to {} not allowed",
                current_state,
                State::Acknowledged
            )))
        }
    };

    generate_step_output(message, "{}")
}