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

use alloc::string::ToString;
use core::fmt::{Display, Error as FmtError, Formatter};

use ibc_proto::google::protobuf::Any;
use ibc_proto::ibc::mock::Header as RawMockHeader;
use ibc_proto::protobuf::Protobuf;
use serde_derive::{Deserialize, Serialize};

use crate::core::ics02_client::client_type::ClientType;
use crate::core::ics02_client::error::Error;
use crate::core::ics02_client::header::Header;
use crate::mock::client_state::client_type as mock_client_type;
use crate::timestamp::Timestamp;
use crate::Height;

pub const MOCK_HEADER_TYPE_URL: &str = "/ibc.mock.Header";

#[derive(Copy, Clone, Debug, Deserialize, PartialEq, Eq, Serialize)]
pub struct MockHeader {
    pub height: Height,
    pub timestamp: Timestamp,
}

impl Default for MockHeader {
    fn default() -> Self {
        Self {
            height: Height::new(0, 1).unwrap(),
            timestamp: Default::default(),
        }
    }
}

impl Display for MockHeader {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), FmtError> {
        write!(
            f,
            "MockHeader {{ height: {}, timestamp: {} }}",
            self.height, self.timestamp
        )
    }
}

impl Protobuf<RawMockHeader> for MockHeader {}

impl TryFrom<RawMockHeader> for MockHeader {
    type Error = Error;

    fn try_from(raw: RawMockHeader) -> Result<Self, Self::Error> {
        Ok(MockHeader {
            height: raw
                .height
                .and_then(|raw_height| raw_height.try_into().ok())
                .ok_or_else(Error::missing_raw_header)?,

            timestamp: Timestamp::from_nanoseconds(raw.timestamp)
                .map_err(Error::invalid_packet_timestamp)?,
        })
    }
}

impl From<MockHeader> for RawMockHeader {
    fn from(value: MockHeader) -> Self {
        RawMockHeader {
            height: Some(value.height.into()),
            timestamp: value.timestamp.nanoseconds(),
        }
    }
}

impl MockHeader {
    pub fn height(&self) -> Height {
        self.height
    }

    pub fn new(height: Height) -> Self {
        Self {
            height,
            timestamp: Timestamp::now(),
        }
    }

    pub fn with_timestamp(self, timestamp: Timestamp) -> Self {
        Self { timestamp, ..self }
    }
}

impl Header for MockHeader {
    fn client_type(&self) -> ClientType {
        mock_client_type()
    }

    fn height(&self) -> Height {
        self.height
    }

    fn timestamp(&self) -> Timestamp {
        self.timestamp
    }
}

impl Protobuf<Any> for MockHeader {}

impl TryFrom<Any> for MockHeader {
    type Error = Error;

    fn try_from(raw: Any) -> Result<Self, Error> {
        match raw.type_url.as_str() {
            MOCK_HEADER_TYPE_URL => Ok(Protobuf::<RawMockHeader>::decode_vec(&raw.value)
                .map_err(Error::invalid_raw_header)?),
            _ => Err(Error::unknown_header_type(raw.type_url)),
        }
    }
}

impl From<MockHeader> for Any {
    fn from(header: MockHeader) -> Self {
        Any {
            type_url: MOCK_HEADER_TYPE_URL.to_string(),
            value: Protobuf::<RawMockHeader>::encode_vec(&header)
                .expect("encoding to `Any` from `TmHeader`"),
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use ibc_proto::protobuf::Protobuf;

    #[test]
    fn encode_any() {
        let header = MockHeader::new(Height::new(1, 10).unwrap()).with_timestamp(Timestamp::none());
        let bytes = <MockHeader as Protobuf<Any>>::encode_vec(&header).unwrap();

        assert_eq!(
            &bytes,
            &[
                10, 16, 47, 105, 98, 99, 46, 109, 111, 99, 107, 46, 72, 101, 97, 100, 101, 114, 18,
                6, 10, 4, 8, 1, 16, 10
            ]
        );
    }
}