oura 2.2.0

The tail of Cardano
Documentation 
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use crate::framework::legacy_v1::{Era, EventData};

use super::prelude::*;

pub(crate) fn block_depth_doesnt_skip_numbers(state: &State) -> Outcome {
    match (&state.previous_block, &state.current_block) {
        (Some(prev), Some(curr)) => Outcome::from((curr.number - prev.number) == 1),
        _ => Outcome::Unknown,
    }
}

pub(crate) fn block_slot_increases(state: &State) -> Outcome {
    match (&state.previous_block, &state.current_block) {
        (Some(prev), Some(curr)) => match curr.era {
            Era::Byron => Outcome::from(prev.slot <= curr.slot),
            _ => Outcome::from(prev.slot < curr.slot),
        },
        _ => Outcome::Unknown,
    }
}

pub(crate) fn event_timestamp_increases(state: &State) -> Outcome {
    match (&state.previous_event, &state.current_event) {
        (Some(prev), Some(curr)) => match (prev.context.timestamp, curr.context.timestamp) {
            (Some(prev), Some(curr)) => Outcome::from(prev <= curr),
            _ => Outcome::Unknown,
        },
        _ => Outcome::Unknown,
    }
}

pub(crate) fn block_previous_hash_matches(state: &State) -> Outcome {
    match (&state.previous_block, &state.current_block) {
        (Some(prev), Some(curr)) => Outcome::from(curr.previous_hash == prev.hash),
        _ => Outcome::Unknown,
    }
}

pub(crate) fn tx_records_matches_block_count(state: &State) -> Outcome {
    match &state.current_event {
        Some(event) => match &event.data {
            EventData::BlockEnd(block) => {
                Outcome::from(block.tx_count == state.tx_records_since_block)
            }
            _ => Outcome::NotApplicable,
        },
        _ => Outcome::Unknown,
    }
}

pub(crate) fn tx_has_input_and_output(state: &State) -> Outcome {
    match &state.current_event {
        Some(event) => match &event.data {
            EventData::Transaction(tx) => match (&tx.inputs, &tx.outputs) {
                (Some(inputs), Some(outputs)) => {
                    Outcome::from(!inputs.is_empty() && !outputs.is_empty())
                }
                _ => Outcome::Unknown,
            },
            _ => Outcome::NotApplicable,
        },
        _ => Outcome::Unknown,
    }
}