mithril_common/cardano_block_scanner/
raw_cardano_point.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
#[cfg(feature = "fs")]
use pallas_network::miniprotocols::Point as PallasPoint;
use std::fmt::{Debug, Formatter};

use crate::cardano_block_scanner::ScannedBlock;
use crate::entities::{ChainPoint, SlotNumber};

/// Point internal representation in the Cardano chain.
#[derive(Clone, PartialEq)]
pub struct RawCardanoPoint {
    /// The [slot number](https://docs.cardano.org/learn/cardano-node/#slotsandepochs)
    pub slot_number: SlotNumber,

    /// Hex array of the block hash
    pub block_hash: Vec<u8>,
}

impl RawCardanoPoint {
    /// Instantiate a new `RawCardanoPoint`
    pub fn new<T: Into<Vec<u8>>>(slot_number: SlotNumber, block_hash: T) -> Self {
        RawCardanoPoint {
            slot_number,
            block_hash: block_hash.into(),
        }
    }

    /// Create a new origin `RawCardanoPoint`
    pub fn origin() -> Self {
        RawCardanoPoint {
            slot_number: SlotNumber(0),
            block_hash: Vec::new(),
        }
    }

    /// Check if origin
    pub fn is_origin(&self) -> bool {
        self.slot_number == 0 && self.block_hash.is_empty()
    }
}

impl From<&ChainPoint> for RawCardanoPoint {
    fn from(point: &ChainPoint) -> Self {
        RawCardanoPoint {
            slot_number: point.slot_number,
            block_hash: hex::decode(&point.block_hash).unwrap(),
        }
    }
}

impl From<ChainPoint> for RawCardanoPoint {
    fn from(point: ChainPoint) -> Self {
        Self::from(&point)
    }
}

impl Debug for RawCardanoPoint {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        let mut debug = f.debug_struct("RawCardanoPoint");
        debug
            .field("slot_number", &self.slot_number)
            .field("block_hash", &hex::encode(&self.block_hash))
            .finish()
    }
}

cfg_fs! {
    impl From<RawCardanoPoint> for PallasPoint {
        fn from(raw_point: RawCardanoPoint) -> Self {
            match raw_point.is_origin() {
                true => Self::Origin,
                false => Self::Specific(
                    *raw_point.slot_number,
                    raw_point.block_hash
                ),
            }
        }
    }

    impl From<PallasPoint> for RawCardanoPoint {
        fn from(point: PallasPoint) -> Self {
            match point {
                PallasPoint::Specific(slot_number, block_hash) => Self {
                    slot_number: SlotNumber(slot_number),
                    block_hash,
                },
                PallasPoint::Origin => Self::origin(),
            }
        }
    }
}

impl From<&ScannedBlock> for RawCardanoPoint {
    fn from(scanned_block: &ScannedBlock) -> Self {
        RawCardanoPoint {
            slot_number: scanned_block.slot_number,
            block_hash: scanned_block.block_hash.clone(),
        }
    }
}

impl From<ScannedBlock> for RawCardanoPoint {
    fn from(scanned_block: ScannedBlock) -> Self {
        Self::from(&scanned_block)
    }
}

#[cfg(test)]
mod tests {
    use crate::entities::BlockNumber;

    use super::*;

    #[test]
    fn from_chain_point_to_raw_cardano_point_conversions() {
        let expected_hash = vec![4, 2, 12, 9, 7];
        let chain_point =
            ChainPoint::new(SlotNumber(8), BlockNumber(23), hex::encode(&expected_hash));

        assert_eq!(
            RawCardanoPoint::new(SlotNumber(8), expected_hash.clone()),
            RawCardanoPoint::from(&chain_point)
        );
        assert_eq!(
            RawCardanoPoint::new(SlotNumber(8), expected_hash.clone()),
            RawCardanoPoint::from(chain_point)
        );
    }

    #[test]
    fn from_scanned_block_to_raw_cardano_point_conversions() {
        let expected_hash = vec![7, 1, 13, 7, 8];
        let scanned_block = ScannedBlock::new(
            expected_hash.clone(),
            BlockNumber(31),
            SlotNumber(4),
            Vec::<&str>::new(),
        );
        assert_eq!(
            RawCardanoPoint::new(SlotNumber(4), expected_hash.clone()),
            RawCardanoPoint::from(&scanned_block)
        );
        assert_eq!(
            RawCardanoPoint::new(SlotNumber(4), expected_hash.clone()),
            RawCardanoPoint::from(scanned_block)
        );
    }
}