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

// RGB Core Library: consensus layer for RGB smart contracts.
//
// SPDX-License-Identifier: Apache-2.0
//
// Written in 2019-2023 by
//     Dr Maxim Orlovsky <orlovsky@lnp-bp.org>
//
// Copyright (C) 2019-2023 LNP/BP Standards Association. All rights reserved.
// Copyright (C) 2019-2023 Dr Maxim Orlovsky. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::str::FromStr;

use amplify::{Bytes32, RawArray};
use baid58::{Baid58ParseError, FromBaid58, ToBaid58};
use bp::secp256k1::rand::{thread_rng, RngCore};
use commit_verify::{CommitVerify, Conceal, StrictEncodedProtocol};
use strict_encoding::StrictEncode;

use super::{ConfidentialState, ExposedState};
use crate::{MediaType, StateCommitment, StateData, StateType, LIB_NAME_RGB};

/// Unique data attachment identifier
#[derive(Wrapper, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash, Debug, Display, From)]
#[wrapper(Deref, BorrowSlice, Hex, Index, RangeOps)]
#[display(Self::to_baid58)]
#[derive(StrictType, StrictDumb, StrictEncode, StrictDecode)]
#[strict_type(lib = LIB_NAME_RGB)]
#[cfg_attr(
    feature = "serde",
    derive(Serialize, Deserialize),
    serde(crate = "serde_crate", transparent)
)]
pub struct AttachId(
    #[from]
    #[from([u8; 32])]
    Bytes32,
);

impl ToBaid58<32> for AttachId {
    const HRI: &'static str = "att";
    fn to_baid58_payload(&self) -> [u8; 32] { self.to_raw_array() }
}
impl FromBaid58<32> for AttachId {}

impl FromStr for AttachId {
    type Err = Baid58ParseError;
    fn from_str(s: &str) -> Result<Self, Self::Err> { Self::from_baid58_str(s) }
}

#[derive(Clone, PartialOrd, Ord, PartialEq, Eq, Hash, Debug)]
#[derive(StrictType, StrictDumb, StrictEncode, StrictDecode)]
#[strict_type(lib = LIB_NAME_RGB)]
#[derive(CommitEncode)]
#[commit_encode(conceal, strategy = strict)]
#[cfg_attr(
    feature = "serde",
    derive(Serialize, Deserialize),
    serde(crate = "serde_crate", rename_all = "camelCase")
)]
pub struct RevealedAttach {
    pub id: AttachId,
    /// We do not enforce a MIME standard since non-standard types can be also
    /// used
    pub media_type: MediaType,
    pub salt: u64,
}

impl RevealedAttach {
    /// Creates new revealed attachment for the attachment id and MIME type.
    /// Uses `thread_rng` to initialize [`RevealedAttach::salt`].
    pub fn new(id: AttachId, media_type: MediaType) -> Self {
        Self {
            id,
            media_type,
            salt: thread_rng().next_u64(),
        }
    }
}

impl ExposedState for RevealedAttach {
    type Confidential = ConcealedAttach;
    fn state_type(&self) -> StateType { StateType::Attachment }
    fn state_data(&self) -> StateData { StateData::Attachment(self.clone()) }
}

impl Conceal for RevealedAttach {
    type Concealed = ConcealedAttach;

    fn conceal(&self) -> Self::Concealed { ConcealedAttach::commit(self) }
}

/// Confidential version of an attachment information.
///
/// See also revealed version [`RevealedAttach`].
#[derive(Wrapper, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash, Debug, From)]
#[wrapper(Deref, BorrowSlice, Hex, Index, RangeOps)]
#[derive(StrictType, StrictDumb, StrictEncode, StrictDecode)]
#[strict_type(lib = LIB_NAME_RGB)]
#[derive(CommitEncode)]
#[commit_encode(strategy = strict)]
#[cfg_attr(
    feature = "serde",
    derive(Serialize, Deserialize),
    serde(crate = "serde_crate", transparent)
)]
pub struct ConcealedAttach(
    #[from]
    #[from([u8; 32])]
    Bytes32,
);

impl ConfidentialState for ConcealedAttach {
    fn state_type(&self) -> StateType { StateType::Attachment }
    fn state_commitment(&self) -> StateCommitment { StateCommitment::Attachment(*self) }
}

impl CommitVerify<RevealedAttach, StrictEncodedProtocol> for ConcealedAttach {
    fn commit(revealed: &RevealedAttach) -> Self { Bytes32::commit(revealed).into() }
}