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

use crate::handler_result::{ViewResult, WriteResult};

pub enum WarpResult<View, Error> {
    WriteResponse(),
    ViewResponse(View),
    ContractError(Error),
    RuntimeError(String),
}

impl<V, E> From<ViewResult<V, E>> for WarpResult<V, E> {
    fn from(value: ViewResult<V, E>) -> Self {
        match value {
            ViewResult::ViewResponse(v) => WarpResult::ViewResponse(v),
            ViewResult::ContractError(e) => WarpResult::ContractError(e),
            ViewResult::RuntimeError(e) => WarpResult::RuntimeError(e),
        }
    }
}

impl<S, V, E> From<WriteResult<S, E>> for WarpResult<V, E> {
    fn from(value: WriteResult<S, E>) -> Self {
        match value {
            WriteResult::WriteResponse(_) => WarpResult::WriteResponse(),
            WriteResult::ContractError(e) => WarpResult::ContractError(e),
            WriteResult::RuntimeError(e) => WarpResult::RuntimeError(e),
        }
    }
}

impl<V, E> From<WarpResult<V, E>> for ViewResult<V, E> {
    fn from(value: WarpResult<V, E>) -> Self {
        match value {
            WarpResult::WriteResponse() => unreachable!(),
            WarpResult::ViewResponse(v) => ViewResult::ViewResponse(v),
            WarpResult::ContractError(e) => ViewResult::ContractError(e),
            WarpResult::RuntimeError(e) => ViewResult::RuntimeError(e),
        }
    }
}

impl<V, E> From<WarpResult<V, E>> for WriteResult<(), E> {
    fn from(value: WarpResult<V, E>) -> Self {
        match value {
            WarpResult::WriteResponse() => WriteResult::WriteResponse(()),
            WarpResult::ViewResponse(_) => unreachable!(),
            WarpResult::ContractError(e) => WriteResult::ContractError(e),
            WarpResult::RuntimeError(e) => WriteResult::RuntimeError(e),
        }
    }
}

// Module defining format as expected by SDK, covers (de)serialization.
// We have this separated from WarpResult above (visible to contract code) to
// keep WarpResult interface clean
pub mod transmission {
    use super::WarpResult;
    use core::fmt::Debug;
    use serde::{de::DeserializeOwned, Deserialize, Serialize};
    use wasm_bindgen::JsValue;

    #[derive(Serialize, Deserialize)]
    pub struct ErrorResult {
        #[serde(rename = "errorMessage")]
        error_message: String,
    }

    #[derive(Serialize, Deserialize, Debug)]
    pub struct Transmission<View, Error> {
        #[serde(rename = "type")]
        result_type: String,
        result: Option<View>,
        error: Option<Error>,
        #[serde(rename = "errorMessage")]
        error_message: Option<String>,
    }

    impl<V: Debug, E: Debug> From<Transmission<V, E>> for WarpResult<V, E> {
        fn from(value: Transmission<V, E>) -> Self {
            match value.result_type.as_str() {
                "ok" if value.result.is_none() => WarpResult::WriteResponse(),
                "ok" => WarpResult::ViewResponse(value.result.unwrap()),
                "error" if value.error.is_some() => WarpResult::ContractError(value.error.unwrap()),
                "exception" if value.error_message.is_some() => {
                    WarpResult::RuntimeError(value.error_message.unwrap())
                }
                _ => WarpResult::RuntimeError(format!("failed to parse response {:?}", value)),
            }
        }
    }

    impl<V, E> From<WarpResult<V, E>> for Transmission<V, E> {
        fn from(value: WarpResult<V, E>) -> Self {
            let mut res = Transmission {
                result_type: "".to_owned(),
                result: None,
                error: None,
                error_message: None,
            };
            match value {
                WarpResult::WriteResponse() => {
                    res.result_type = "ok".to_owned();
                }
                WarpResult::ViewResponse(v) => {
                    res.result_type = "ok".to_owned();
                    res.result = Some(v);
                }
                WarpResult::ContractError(e) => {
                    res.result_type = "error".to_owned();
                    res.error = Some(e);
                }
                WarpResult::RuntimeError(e) => {
                    res.result_type = "exception".to_owned();
                    res.error_message = Some(e);
                }
            };
            res
        }
    }

    pub fn from_json<V: Debug, E: Debug>(warp_result: JsValue) -> WarpResult<V, E>
    where
        V: DeserializeOwned,
        E: DeserializeOwned,
    {
        match serde_wasm_bindgen::from_value::<Transmission<V, E>>(warp_result) {
            Ok(t) => t.into(),
            Err(e) => WarpResult::RuntimeError(format!("{e:?}")),
        }
    }
}