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

// SPDX-License-Identifier: MIT
// Copyright (c) 2012-2022 Supercolony
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the"Software"),
// to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

/// Return the hash of the format!("{}::{}", ::core::module_path!(), struct_name).
/// Also, if field naming is provided, it will return the hash of the format!("{}::{}::{}", ::core::module_path!(), struct_name, field_name).
/// It cam be used to generate unique storage key of the struct.
#[macro_export]
macro_rules! storage_unique_key {
    ($struct:ident) => {{
        $crate::traits::ConstHasher::hash(
            $crate::traits::const_format::concatcp!(
                ::core::module_path!(),
                "::",
                ::core::stringify!($struct)
            ),
        )
    }};
    ($struct:literal, $field:literal) => {{
        $crate::traits::ConstHasher::hash(
            $crate::traits::const_format::concatcp!(
                ::core::module_path!(),
                "::",
                $struct,
                "::",
                $field
            ),
        )
    }};
}

#[test]
fn correct_storage_key() {
    use crate::traits::ConstHasher;
    use ink::storage::traits::StorageKey;

    mod contracts {
        pub mod psp22 {
            use ink::storage::traits::StorageKey;

            pub struct Data;

            impl StorageKey for Data {
                const KEY: u32 = storage_unique_key!(Data);
            }
        }

        pub mod psp34 {
            use ink::storage::traits::StorageKey;

            pub struct Data;

            impl StorageKey for Data {
                const KEY: u32 = storage_unique_key!(Data);
            }
        }
    }

    let expected_hash_psp22 =
        ConstHasher::hash("pendzl_lang::macros::contracts::psp22::Data");
    assert_eq!(
        expected_hash_psp22,
        <contracts::psp22::Data as StorageKey>::KEY
    );

    let expected_hash_psp34 =
        ConstHasher::hash("pendzl_lang::macros::contracts::psp34::Data");
    assert_eq!(
        expected_hash_psp34,
        <contracts::psp34::Data as StorageKey>::KEY
    );
}