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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

use crate::database::{
    Column,
    Database,
};
use fuel_core_storage::{
    tables::ContractsAssets,
    Error as StorageError,
    Mappable,
    MerkleRoot,
    MerkleRootStorage,
    StorageInspect,
    StorageMutate,
};
use fuel_core_types::{
    fuel_merkle::common::empty_sum_sha256,
    fuel_types::ContractId,
};
use std::borrow::Cow;

impl StorageInspect<ContractsAssets> for Database {
    type Error = StorageError;

    fn get(
        &self,
        key: &<ContractsAssets as Mappable>::Key,
    ) -> Result<Option<Cow<<ContractsAssets as Mappable>::OwnedValue>>, Self::Error> {
        self.get(key.as_ref(), Column::ContractsAssets)
            .map_err(Into::into)
    }

    fn contains_key(
        &self,
        key: &<ContractsAssets as Mappable>::Key,
    ) -> Result<bool, Self::Error> {
        self.contains_key(key.as_ref(), Column::ContractsAssets)
            .map_err(Into::into)
    }
}

impl StorageMutate<ContractsAssets> for Database {
    fn insert(
        &mut self,
        key: &<ContractsAssets as Mappable>::Key,
        value: &<ContractsAssets as Mappable>::Value,
    ) -> Result<Option<<ContractsAssets as Mappable>::OwnedValue>, Self::Error> {
        Database::insert(self, key.as_ref(), Column::ContractsAssets, value)
            .map_err(Into::into)
    }

    fn remove(
        &mut self,
        key: &<ContractsAssets as Mappable>::Key,
    ) -> Result<Option<<ContractsAssets as Mappable>::OwnedValue>, Self::Error> {
        Database::remove(self, key.as_ref(), Column::ContractsAssets).map_err(Into::into)
    }
}

impl MerkleRootStorage<ContractId, ContractsAssets> for Database {
    fn root(&self, _: &ContractId) -> Result<MerkleRoot, Self::Error> {
        Ok(*empty_sum_sha256())
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use fuel_core_storage::{
        StorageAsMut,
        StorageAsRef,
    };
    use fuel_core_types::{
        fuel_asm::Word,
        fuel_types::AssetId,
    };

    #[test]
    fn get() {
        let key = (&ContractId::from([1u8; 32]), &AssetId::new([1u8; 32])).into();
        let balance: Word = 100;

        let database = &mut Database::default();
        database
            .storage::<ContractsAssets>()
            .insert(&key, &balance)
            .unwrap();

        assert_eq!(
            database
                .storage::<ContractsAssets>()
                .get(&key)
                .unwrap()
                .unwrap()
                .into_owned(),
            balance
        );
    }

    #[test]
    fn put() {
        let key = (&ContractId::from([1u8; 32]), &AssetId::new([1u8; 32])).into();
        let balance: Word = 100;

        let database = &mut Database::default();
        database
            .storage::<ContractsAssets>()
            .insert(&key, &balance)
            .unwrap();

        let returned = database
            .storage::<ContractsAssets>()
            .get(&key)
            .unwrap()
            .unwrap();
        assert_eq!(*returned, balance);
    }

    #[test]
    fn remove() {
        let key = (&ContractId::from([1u8; 32]), &AssetId::new([1u8; 32])).into();
        let balance: Word = 100;

        let database = &mut Database::default();
        database
            .storage::<ContractsAssets>()
            .insert(&key, &balance)
            .unwrap();

        database.storage::<ContractsAssets>().remove(&key).unwrap();

        assert!(!database
            .storage::<ContractsAssets>()
            .contains_key(&key)
            .unwrap());
    }

    #[test]
    fn exists() {
        let key = (&ContractId::from([1u8; 32]), &AssetId::new([1u8; 32])).into();
        let balance: Word = 100;

        let database = &mut Database::default();
        database
            .storage::<ContractsAssets>()
            .insert(&key, &balance)
            .unwrap();

        assert!(database
            .storage::<ContractsAssets>()
            .contains_key(&key)
            .unwrap());
    }

    #[test]
    fn root() {
        let key = (&ContractId::from([1u8; 32]), &AssetId::new([1u8; 32])).into();
        let balance: Word = 100;

        let mut database = Database::default();

        StorageMutate::<ContractsAssets>::insert(&mut database, &key, &balance).unwrap();

        let root = database
            .storage::<ContractsAssets>()
            .root(key.contract_id());
        assert!(root.is_ok())
    }
}