ckb-store 0.121.0-rc2

ckb chain related persistent implementation
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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156

//! TODO(doc): @quake
use crate::ChainStore;
use ckb_traits::{
    CellDataProvider, EpochProvider, ExtensionProvider, HeaderFields, HeaderFieldsProvider,
    HeaderProvider,
};
use ckb_types::{
    bytes::Bytes,
    core::{BlockExt, BlockNumber, EpochExt, HeaderView},
    packed::{self, Byte32, OutPoint},
};
use std::sync::Arc;

/// DataLoaderWrapper wrap`ChainStore`
/// impl `HeaderProvider` `CellDataProvider` `EpochProvider`
pub struct DataLoaderWrapper<T>(Arc<T>);

// auto derive don't work
impl<T> Clone for DataLoaderWrapper<T> {
    fn clone(&self) -> Self {
        DataLoaderWrapper(Arc::clone(&self.0))
    }
}

/// Auto transform Arc wrapped `ChainStore` to `DataLoaderWrapper`
pub trait AsDataLoader<T> {
    /// Return arc cloned DataLoaderWrapper
    fn as_data_loader(&self) -> DataLoaderWrapper<T>;
}

impl<T> AsDataLoader<T> for Arc<T>
where
    T: ChainStore,
{
    fn as_data_loader(&self) -> DataLoaderWrapper<T> {
        DataLoaderWrapper(Arc::clone(self))
    }
}

impl<T> CellDataProvider for DataLoaderWrapper<T>
where
    T: ChainStore,
{
    fn get_cell_data(&self, out_point: &OutPoint) -> Option<Bytes> {
        ChainStore::get_cell_data(self.0.as_ref(), out_point).map(|(data, _)| data)
    }

    fn get_cell_data_hash(&self, out_point: &OutPoint) -> Option<Byte32> {
        ChainStore::get_cell_data_hash(self.0.as_ref(), out_point)
    }
}

impl<T> HeaderProvider for DataLoaderWrapper<T>
where
    T: ChainStore,
{
    fn get_header(&self, block_hash: &Byte32) -> Option<HeaderView> {
        ChainStore::get_block_header(self.0.as_ref(), block_hash)
    }
}

impl<T> HeaderFieldsProvider for DataLoaderWrapper<T>
where
    T: ChainStore,
{
    fn get_header_fields(&self, hash: &Byte32) -> Option<HeaderFields> {
        self.0.get_block_header(hash).map(|header| HeaderFields {
            number: header.number(),
            epoch: header.epoch(),
            parent_hash: header.data().raw().parent_hash(),
            timestamp: header.timestamp(),
            hash: header.hash(),
        })
    }
}

impl<T> EpochProvider for DataLoaderWrapper<T>
where
    T: ChainStore,
{
    fn get_epoch_ext(&self, header: &HeaderView) -> Option<EpochExt> {
        ChainStore::get_block_epoch_index(self.0.as_ref(), &header.hash())
            .and_then(|index| ChainStore::get_epoch_ext(self.0.as_ref(), &index))
    }

    fn get_block_hash(&self, number: BlockNumber) -> Option<Byte32> {
        ChainStore::get_block_hash(self.0.as_ref(), number)
    }

    fn get_block_ext(&self, block_hash: &Byte32) -> Option<BlockExt> {
        ChainStore::get_block_ext(self.0.as_ref(), block_hash)
    }

    fn get_block_header(&self, hash: &Byte32) -> Option<HeaderView> {
        ChainStore::get_block_header(self.0.as_ref(), hash)
    }
}

impl<T> ExtensionProvider for DataLoaderWrapper<T>
where
    T: ChainStore,
{
    fn get_block_extension(&self, hash: &Byte32) -> Option<packed::Bytes> {
        ChainStore::get_block_extension(self.0.as_ref(), hash)
    }
}

/// Borrowed DataLoaderWrapper with lifetime
pub struct BorrowedDataLoaderWrapper<'a, T>(&'a T);
impl<'a, T: ChainStore> BorrowedDataLoaderWrapper<'a, T> {
    /// Construct new BorrowedDataLoaderWrapper
    pub fn new(source: &'a T) -> Self {
        BorrowedDataLoaderWrapper(source)
    }
}

impl<'a, T: ChainStore> CellDataProvider for BorrowedDataLoaderWrapper<'a, T> {
    fn get_cell_data(&self, out_point: &OutPoint) -> Option<Bytes> {
        self.0.get_cell_data(out_point).map(|(data, _)| data)
    }

    fn get_cell_data_hash(&self, out_point: &OutPoint) -> Option<Byte32> {
        self.0.get_cell_data_hash(out_point)
    }
}

impl<'a, T: ChainStore> HeaderProvider for BorrowedDataLoaderWrapper<'a, T> {
    fn get_header(&self, block_hash: &Byte32) -> Option<HeaderView> {
        self.0.get_block_header(block_hash)
    }
}

impl<'a, T: ChainStore> EpochProvider for BorrowedDataLoaderWrapper<'a, T> {
    fn get_epoch_ext(&self, header: &HeaderView) -> Option<EpochExt> {
        ChainStore::get_block_epoch_index(self.0, &header.hash())
            .and_then(|index| ChainStore::get_epoch_ext(self.0, &index))
    }

    fn get_block_hash(&self, number: BlockNumber) -> Option<Byte32> {
        ChainStore::get_block_hash(self.0, number)
    }

    fn get_block_ext(&self, block_hash: &Byte32) -> Option<BlockExt> {
        ChainStore::get_block_ext(self.0, block_hash)
    }

    fn get_block_header(&self, hash: &Byte32) -> Option<HeaderView> {
        ChainStore::get_block_header(self.0, hash)
    }
}

impl<'a, T: ChainStore> ExtensionProvider for BorrowedDataLoaderWrapper<'a, T> {
    fn get_block_extension(&self, hash: &Byte32) -> Option<packed::Bytes> {
        ChainStore::get_block_extension(self.0, hash)
    }
}