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

use super::*;

pub const USE_AUTHORITY_RECORD_SIZE: usize = 18; //8 byte padding

#[repr(C)]
#[cfg_attr(feature = "serde-feature", derive(Serialize, Deserialize))]
#[derive(BorshSerialize, BorshDeserialize, PartialEq, Eq, Debug, Clone, FromPrimitive)]
pub enum UseMethod {
    Burn,
    Multiple,
    Single,
}

#[repr(C)]
#[cfg_attr(feature = "serde-feature", derive(Serialize, Deserialize))]
#[derive(BorshSerialize, BorshDeserialize, PartialEq, Eq, Debug, Clone)]
pub struct Uses {
    // 17 bytes + Option byte
    pub use_method: UseMethod, //1
    pub remaining: u64,        //8
    pub total: u64,            //8
}

#[repr(C)]
#[cfg_attr(feature = "serde-feature", derive(Serialize, Deserialize))]
#[derive(BorshSerialize, BorshDeserialize, PartialEq, Eq, Debug, Clone, ShankAccount)]
pub struct UseAuthorityRecord {
    pub key: Key,          //1
    pub allowed_uses: u64, //8
    pub bump: u8,
}

impl Default for UseAuthorityRecord {
    fn default() -> Self {
        UseAuthorityRecord {
            key: Key::UseAuthorityRecord,
            allowed_uses: 0,
            bump: 255,
        }
    }
}

impl TokenMetadataAccount for UseAuthorityRecord {
    fn key() -> Key {
        Key::UseAuthorityRecord
    }

    fn size() -> usize {
        USE_AUTHORITY_RECORD_SIZE
    }
}

impl UseAuthorityRecord {
    pub fn from_bytes(b: &[u8]) -> Result<UseAuthorityRecord, ProgramError> {
        let ua: UseAuthorityRecord =
            try_from_slice_checked(b, Key::UseAuthorityRecord, USE_AUTHORITY_RECORD_SIZE)?;
        Ok(ua)
    }

    pub fn bump_empty(&self) -> bool {
        self.bump == 0 && self.key == Key::UseAuthorityRecord
    }
}

#[cfg(test)]
mod tests {
    use borsh::BorshSerialize;
    use solana_program::account_info::AccountInfo;
    use solana_sdk::{signature::Keypair, signer::Signer};

    use crate::{
        error::MetadataError,
        state::{CollectionAuthorityRecord, Key, TokenMetadataAccount, UseAuthorityRecord},
        ID,
    };

    #[test]
    fn successfully_deserialize() {
        let expected_data = UseAuthorityRecord::default();

        let mut buf = Vec::new();
        expected_data.serialize(&mut buf).unwrap();
        UseAuthorityRecord::pad_length(&mut buf).unwrap();

        let pubkey = Keypair::new().pubkey();
        let owner = &ID;
        let mut lamports = 1_000_000_000;
        let mut data = buf.clone();

        let account_info = AccountInfo::new(
            &pubkey,
            false,
            true,
            &mut lamports,
            &mut data,
            owner,
            false,
            1_000_000_000,
        );

        let data = UseAuthorityRecord::from_account_info(&account_info).unwrap();
        assert_eq!(data.key, Key::UseAuthorityRecord);
        assert_eq!(data, expected_data);
    }

    #[test]
    fn deserializing_wrong_account_type_fails() {
        let wrong_type = CollectionAuthorityRecord::default();

        let mut buf = Vec::new();
        wrong_type.serialize(&mut buf).unwrap();

        let pubkey = Keypair::new().pubkey();
        let owner = &ID;
        let mut lamports = 1_000_000_000;
        let mut data = buf.clone();

        let account_info = AccountInfo::new(
            &pubkey,
            false,
            true,
            &mut lamports,
            &mut data,
            owner,
            false,
            1_000_000_000,
        );

        let error = UseAuthorityRecord::from_account_info(&account_info).unwrap_err();
        assert_eq!(error, MetadataError::DataTypeMismatch.into());
    }
}