chia-sdk-driver 0.33.0

Driver code for interacting with standard puzzles on the Chia blockchain.
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
157
158
159
160
161
162
163
164
165

use chia_protocol::{Bytes32, Coin};
use chia_puzzle_types::{
    CoinProof, LineageProof,
    cat::{CatArgs, CatSolution},
};
use chia_sdk_types::puzzles::{PrecommitLayerSolution, PrecommitSpendMode};
use clvm_traits::ToClvm;
use clvm_utils::TreeHash;
use clvmr::{Allocator, NodePtr};

use crate::{CatLayer, DriverError, Layer, PrecommitLayer, Spend, SpendContext};

#[derive(Debug, Clone)]
#[must_use]
pub struct PrecommitCoin<V> {
    pub coin: Coin,
    pub asset_id: Bytes32,
    pub proof: LineageProof,
    pub inner_puzzle_hash: Bytes32,

    pub controller_singleton_struct_hash: Bytes32,
    pub relative_block_height: u32,
    pub payout_puzzle_hash: Bytes32,
    pub refund_puzzle_hash: Bytes32,
    pub value: V,
}

impl<V> PrecommitCoin<V> {
    #[allow(clippy::too_many_arguments)]
    pub fn new(
        ctx: &mut SpendContext,
        parent_coin_id: Bytes32,
        proof: LineageProof,
        asset_id: Bytes32,
        controller_singleton_struct_hash: Bytes32,
        relative_block_height: u32,
        payout_puzzle_hash: Bytes32,
        refund_puzzle_hash: Bytes32,
        value: V,
        precommit_amount: u64,
    ) -> Result<Self, DriverError>
    where
        V: ToClvm<Allocator> + Clone,
    {
        let value_ptr = ctx.alloc(&value)?;
        let value_hash = ctx.tree_hash(value_ptr);

        let inner_puzzle_hash = PrecommitLayer::<V>::puzzle_hash(
            controller_singleton_struct_hash,
            relative_block_height,
            payout_puzzle_hash,
            refund_puzzle_hash,
            value_hash,
        );

        Ok(Self {
            coin: Coin::new(
                parent_coin_id,
                CatArgs::curry_tree_hash(asset_id, inner_puzzle_hash).into(),
                precommit_amount,
            ),
            proof,
            asset_id,
            inner_puzzle_hash: inner_puzzle_hash.into(),
            controller_singleton_struct_hash,
            relative_block_height,
            payout_puzzle_hash,
            refund_puzzle_hash,
            value,
        })
    }

    pub fn puzzle_hash(
        asset_id: Bytes32,
        controller_singleton_struct_hash: Bytes32,
        relative_block_height: u32,
        payout_puzzle_hash: Bytes32,
        refund_puzzle_hash: Bytes32,
        value_hash: TreeHash,
    ) -> TreeHash {
        CatArgs::curry_tree_hash(
            asset_id,
            PrecommitLayer::<V>::puzzle_hash(
                controller_singleton_struct_hash,
                relative_block_height,
                payout_puzzle_hash,
                refund_puzzle_hash,
                value_hash,
            ),
        )
    }

    pub fn inner_puzzle(&self, ctx: &mut SpendContext) -> Result<NodePtr, DriverError>
    where
        V: Clone + ToClvm<Allocator>,
    {
        PrecommitLayer::<V>::new(
            self.controller_singleton_struct_hash,
            self.relative_block_height,
            self.payout_puzzle_hash,
            self.refund_puzzle_hash,
            self.value.clone(),
        )
        .construct_puzzle(ctx)
    }

    pub fn construct_puzzle(&self, ctx: &mut SpendContext) -> Result<NodePtr, DriverError>
    where
        V: Clone + ToClvm<Allocator>,
    {
        let inner_puzzle = self.inner_puzzle(ctx)?;

        CatLayer::<NodePtr>::new(self.asset_id, inner_puzzle).construct_puzzle(ctx)
    }

    pub fn construct_solution(
        &self,
        ctx: &mut SpendContext,
        mode: PrecommitSpendMode,
        singleton_inner_puzzle_hash: Bytes32,
    ) -> Result<NodePtr, DriverError>
    where
        V: ToClvm<Allocator> + Clone,
    {
        let layers = CatLayer::<NodePtr>::new(self.asset_id, self.inner_puzzle(ctx)?);

        let inner_puzzle_solution = ctx.alloc(&PrecommitLayerSolution {
            mode,
            my_amount: self.coin.amount,
            singleton_inner_puzzle_hash,
        })?;

        layers.construct_solution(
            ctx,
            CatSolution {
                inner_puzzle_solution,
                lineage_proof: Some(self.proof),
                prev_coin_id: self.coin.coin_id(),
                this_coin_info: self.coin,
                next_coin_proof: CoinProof {
                    parent_coin_info: self.coin.parent_coin_info,
                    inner_puzzle_hash: self.inner_puzzle_hash,
                    amount: self.coin.amount,
                },
                prev_subtotal: 0,
                extra_delta: 0,
            },
        )
    }

    pub fn spend(
        &self,
        ctx: &mut SpendContext,
        mode: PrecommitSpendMode,
        spender_inner_puzzle_hash: Bytes32,
    ) -> Result<(), DriverError>
    where
        V: ToClvm<Allocator> + Clone,
    {
        let puzzle = self.construct_puzzle(ctx)?;
        let solution = self.construct_solution(ctx, mode, spender_inner_puzzle_hash)?;

        ctx.spend(self.coin, Spend::new(puzzle, solution))
    }
}