odra-modules 2.9.1

Collection of reusable Odra modules.
Documentation 
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

#[cfg(test)]
mod mint_and_burn_tests {
    use odra::prelude::*;

    use odra::casper_types::U256;
    use odra::host::HostRef;

    use crate::cep18::errors::Error;
    use crate::cep18::events::{Burn, Mint};
    use crate::cep18_token::tests::{
        setup, TOKEN_OWNER_AMOUNT_1, TOKEN_OWNER_AMOUNT_2, TRANSFER_AMOUNT_1
    };
    use crate::cep18_token::utils::Error as MockErrors;

    #[test]
    fn test_mint_and_burn() {
        let mut cep18_token = setup();

        let alice = cep18_token.env().get_account(1);
        let bob = cep18_token.env().get_account(2);
        let owner = cep18_token.env().caller();
        let initial_supply = cep18_token.total_supply();
        let amount = TRANSFER_AMOUNT_1.into();

        cep18_token.mint(&alice, &amount);
        assert_eq!(cep18_token.total_supply(), initial_supply + amount);
        // and a Mint event is emitted
        assert!(cep18_token.env().emitted_event(
            &cep18_token,
            Mint {
                recipient: alice,
                amount
            }
        ));

        cep18_token.mint(&bob, &amount);
        assert_eq!(cep18_token.total_supply(), initial_supply + amount + amount);
        assert_eq!(cep18_token.balance_of(&bob), amount);
        assert_eq!(cep18_token.balance_of(&alice), amount);
        assert_eq!(cep18_token.balance_of(&owner), initial_supply);

        cep18_token.burn(&owner, &amount);
        assert_eq!(cep18_token.total_supply(), initial_supply + amount);
        assert_eq!(cep18_token.balance_of(&alice), amount);
        assert_eq!(cep18_token.balance_of(&bob), amount);
        assert_eq!(
            cep18_token.balance_of(&owner),
            initial_supply.saturating_sub(amount)
        );
        // and a Burn event is emitted
        assert!(cep18_token
            .env()
            .emitted_event(&cep18_token, Burn { owner, amount }));
    }

    #[test]
    fn test_should_not_mint_above_limits() {
        let mut cep18_token = setup();
        let mint_amount = U256::MAX;

        let alice = cep18_token.env().get_account(1);
        let bob = cep18_token.env().get_account(2);

        cep18_token.mint(&alice, &U256::from(TOKEN_OWNER_AMOUNT_1));
        cep18_token.mint(&bob, &U256::from(TOKEN_OWNER_AMOUNT_2));

        assert_eq!(
            cep18_token.balance_of(&alice),
            U256::from(TOKEN_OWNER_AMOUNT_1)
        );

        let result = cep18_token.try_mint(&alice, &mint_amount);
        assert_eq!(result, Err(ExecutionError::AdditionOverflow.into()));
    }

    #[test]
    fn should_not_burn_above_balance() {
        let mut cep18_token = setup();
        let alice = cep18_token.env().get_account(1);
        let bob = cep18_token.env().get_account(2);

        cep18_token.mint(&alice, &U256::from(TOKEN_OWNER_AMOUNT_1));
        cep18_token.mint(&bob, &U256::from(TOKEN_OWNER_AMOUNT_2));

        assert_eq!(
            cep18_token.balance_of(&alice),
            U256::from(TOKEN_OWNER_AMOUNT_1)
        );

        cep18_token.env().set_caller(alice);
        let result = cep18_token.try_burn(&alice, &U256::from(TOKEN_OWNER_AMOUNT_1 + 1));
        assert_eq!(result.err().unwrap(), Error::InsufficientBalance.into());
    }

    #[test]
    fn should_not_burn_others_tokens() {
        let mut cep18_token = setup();
        let alice = cep18_token.env().get_account(1);
        let bob = cep18_token.env().get_account(2);
        let amount = TRANSFER_AMOUNT_1.into();

        cep18_token.mint(&alice, &amount);

        // bob cannot burn alice's tokens
        cep18_token.env().set_caller(bob);
        let result = cep18_token.try_burn(&alice, &amount);
        assert_eq!(result.err().unwrap(), MockErrors::CantBurn.into());

        // alice's balance remains unchanged
        assert_eq!(cep18_token.balance_of(&alice), amount);
    }

    #[test]
    fn test_security_no_rights() {
        // given a token with mint and burn enabled
        let mut cep18_token = setup();
        let alice = cep18_token.env().get_account(1);
        let bob = cep18_token.env().get_account(2);
        let amount = TRANSFER_AMOUNT_1.into();

        // an admin can mint tokens
        cep18_token.mint(&alice, &amount);
        cep18_token.mint(&bob, &amount);

        assert_eq!(cep18_token.balance_of(&alice), amount);
        assert_eq!(cep18_token.balance_of(&bob), amount);

        // user without permissions cannot mint tokens
        cep18_token.env().set_caller(alice);
        let result = cep18_token.try_mint(&bob, &amount);
        assert_eq!(result.err().unwrap(), MockErrors::CantMint.into());

        // but can burn their own tokens
        cep18_token.burn(&alice, &amount);
        assert_eq!(cep18_token.balance_of(&alice), 0.into());
        assert_eq!(cep18_token.balance_of(&bob), amount);
    }
}