chia 0.2.2

Utility functions and types used by the Chia blockchain full node
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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305

use crate::gen::flags::ENABLE_ASSERT_BEFORE;
use clvmr::allocator::{Allocator, NodePtr, SExp};
use clvmr::cost::Cost;

pub type ConditionOpcode = u8;

// AGG_SIG is ascii "1"
pub const AGG_SIG_UNSAFE: ConditionOpcode = 49;
pub const AGG_SIG_ME: ConditionOpcode = 50;

// the conditions below reserve coin amounts and have to be accounted for in
// output totals
pub const CREATE_COIN: ConditionOpcode = 51;
pub const RESERVE_FEE: ConditionOpcode = 52;

// the conditions below deal with announcements, for inter-coin communication
pub const CREATE_COIN_ANNOUNCEMENT: ConditionOpcode = 60;
pub const ASSERT_COIN_ANNOUNCEMENT: ConditionOpcode = 61;
pub const CREATE_PUZZLE_ANNOUNCEMENT: ConditionOpcode = 62;
pub const ASSERT_PUZZLE_ANNOUNCEMENT: ConditionOpcode = 63;
pub const ASSERT_CONCURRENT_SPEND: ConditionOpcode = 64;
pub const ASSERT_CONCURRENT_PUZZLE: ConditionOpcode = 65;

// the conditions below let coins inquire about themselves
pub const ASSERT_MY_COIN_ID: ConditionOpcode = 70;
pub const ASSERT_MY_PARENT_ID: ConditionOpcode = 71;
pub const ASSERT_MY_PUZZLEHASH: ConditionOpcode = 72;
pub const ASSERT_MY_AMOUNT: ConditionOpcode = 73;

// the conditions below ensure that we're "far enough" in the future
// wall-clock time
pub const ASSERT_SECONDS_RELATIVE: ConditionOpcode = 80;
pub const ASSERT_SECONDS_ABSOLUTE: ConditionOpcode = 81;

// block index
pub const ASSERT_HEIGHT_RELATIVE: ConditionOpcode = 82;
pub const ASSERT_HEIGHT_ABSOLUTE: ConditionOpcode = 83;

// spend is not valid if block timestamp exceeds the specified one
pub const ASSERT_BEFORE_SECONDS_RELATIVE: ConditionOpcode = 84;
pub const ASSERT_BEFORE_SECONDS_ABSOLUTE: ConditionOpcode = 85;

// spend is not valid if block height exceeds the specified height
pub const ASSERT_BEFORE_HEIGHT_RELATIVE: ConditionOpcode = 86;
pub const ASSERT_BEFORE_HEIGHT_ABSOLUTE: ConditionOpcode = 87;

// no-op condition
pub const ALWAYS_TRUE: ConditionOpcode = 1;

pub const CREATE_COIN_COST: Cost = 1800000;
pub const AGG_SIG_COST: Cost = 1200000;

pub fn parse_opcode(a: &Allocator, op: NodePtr, flags: u32) -> Option<ConditionOpcode> {
    let buf = match a.sexp(op) {
        SExp::Atom(_) => a.atom(op),
        _ => return None,
    };
    if buf.len() != 1 {
        return None;
    }

    match buf[0] {
        AGG_SIG_UNSAFE
        | AGG_SIG_ME
        | CREATE_COIN
        | RESERVE_FEE
        | CREATE_COIN_ANNOUNCEMENT
        | ASSERT_COIN_ANNOUNCEMENT
        | CREATE_PUZZLE_ANNOUNCEMENT
        | ASSERT_PUZZLE_ANNOUNCEMENT
        | ASSERT_MY_COIN_ID
        | ASSERT_MY_PARENT_ID
        | ASSERT_MY_PUZZLEHASH
        | ASSERT_MY_AMOUNT
        | ASSERT_SECONDS_RELATIVE
        | ASSERT_SECONDS_ABSOLUTE
        | ASSERT_HEIGHT_RELATIVE
        | ASSERT_HEIGHT_ABSOLUTE
        | ALWAYS_TRUE => Some(buf[0]),
        _ => {
            if (flags & ENABLE_ASSERT_BEFORE) != 0 {
                match buf[0] {
                    ASSERT_BEFORE_SECONDS_RELATIVE
                    | ASSERT_BEFORE_SECONDS_ABSOLUTE
                    | ASSERT_BEFORE_HEIGHT_RELATIVE
                    | ASSERT_BEFORE_HEIGHT_ABSOLUTE
                    | ASSERT_CONCURRENT_SPEND
                    | ASSERT_CONCURRENT_PUZZLE => Some(buf[0]),
                    _ => None,
                }
            } else {
                None
            }
        }
    }
}

#[cfg(test)]
fn opcode_tester(a: &mut Allocator, val: &[u8]) -> Option<ConditionOpcode> {
    let v = a.new_atom(val).unwrap();
    parse_opcode(&a, v, 0)
}

#[cfg(test)]
fn opcode_tester_with_assert_before(a: &mut Allocator, val: &[u8]) -> Option<ConditionOpcode> {
    let v = a.new_atom(val).unwrap();
    parse_opcode(&a, v, ENABLE_ASSERT_BEFORE)
}

#[test]
fn test_parse_opcode() {
    let mut a = Allocator::new();
    assert_eq!(
        opcode_tester(&mut a, &[AGG_SIG_UNSAFE]),
        Some(AGG_SIG_UNSAFE)
    );
    assert_eq!(opcode_tester(&mut a, &[AGG_SIG_ME]), Some(AGG_SIG_ME));
    assert_eq!(opcode_tester(&mut a, &[CREATE_COIN]), Some(CREATE_COIN));
    assert_eq!(opcode_tester(&mut a, &[RESERVE_FEE]), Some(RESERVE_FEE));
    assert_eq!(
        opcode_tester(&mut a, &[CREATE_COIN_ANNOUNCEMENT]),
        Some(CREATE_COIN_ANNOUNCEMENT)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_COIN_ANNOUNCEMENT]),
        Some(ASSERT_COIN_ANNOUNCEMENT)
    );
    assert_eq!(
        opcode_tester(&mut a, &[CREATE_PUZZLE_ANNOUNCEMENT]),
        Some(CREATE_PUZZLE_ANNOUNCEMENT)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_PUZZLE_ANNOUNCEMENT]),
        Some(ASSERT_PUZZLE_ANNOUNCEMENT)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_MY_COIN_ID]),
        Some(ASSERT_MY_COIN_ID)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_MY_PARENT_ID]),
        Some(ASSERT_MY_PARENT_ID)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_MY_PUZZLEHASH]),
        Some(ASSERT_MY_PUZZLEHASH)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_MY_AMOUNT]),
        Some(ASSERT_MY_AMOUNT)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_SECONDS_RELATIVE]),
        Some(ASSERT_SECONDS_RELATIVE)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_SECONDS_ABSOLUTE]),
        Some(ASSERT_SECONDS_ABSOLUTE)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_HEIGHT_RELATIVE]),
        Some(ASSERT_HEIGHT_RELATIVE)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_HEIGHT_ABSOLUTE]),
        Some(ASSERT_HEIGHT_ABSOLUTE)
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_BEFORE_SECONDS_RELATIVE]),
        None
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_BEFORE_SECONDS_ABSOLUTE]),
        None
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_BEFORE_HEIGHT_RELATIVE]),
        None
    );
    assert_eq!(
        opcode_tester(&mut a, &[ASSERT_BEFORE_HEIGHT_ABSOLUTE]),
        None
    );
    assert_eq!(opcode_tester(&mut a, &[ASSERT_CONCURRENT_SPEND]), None);
    assert_eq!(opcode_tester(&mut a, &[ASSERT_CONCURRENT_PUZZLE]), None);

    assert_eq!(opcode_tester(&mut a, &[ALWAYS_TRUE]), Some(ALWAYS_TRUE));
    // leading zeros are not allowed, it makes it a different value
    assert_eq!(opcode_tester(&mut a, &[ASSERT_HEIGHT_ABSOLUTE, 0]), None);
    assert_eq!(opcode_tester(&mut a, &[0, ASSERT_HEIGHT_ABSOLUTE]), None);
    assert_eq!(opcode_tester(&mut a, &[0]), None);

    // test with the ENABLE_ASSERT_BEFORE flag as well

    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[AGG_SIG_UNSAFE]),
        Some(AGG_SIG_UNSAFE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[AGG_SIG_ME]),
        Some(AGG_SIG_ME)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[CREATE_COIN]),
        Some(CREATE_COIN)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[RESERVE_FEE]),
        Some(RESERVE_FEE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[CREATE_COIN_ANNOUNCEMENT]),
        Some(CREATE_COIN_ANNOUNCEMENT)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_COIN_ANNOUNCEMENT]),
        Some(ASSERT_COIN_ANNOUNCEMENT)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[CREATE_PUZZLE_ANNOUNCEMENT]),
        Some(CREATE_PUZZLE_ANNOUNCEMENT)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_PUZZLE_ANNOUNCEMENT]),
        Some(ASSERT_PUZZLE_ANNOUNCEMENT)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_MY_COIN_ID]),
        Some(ASSERT_MY_COIN_ID)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_MY_PARENT_ID]),
        Some(ASSERT_MY_PARENT_ID)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_MY_PUZZLEHASH]),
        Some(ASSERT_MY_PUZZLEHASH)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_MY_AMOUNT]),
        Some(ASSERT_MY_AMOUNT)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_SECONDS_RELATIVE]),
        Some(ASSERT_SECONDS_RELATIVE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_SECONDS_ABSOLUTE]),
        Some(ASSERT_SECONDS_ABSOLUTE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_HEIGHT_RELATIVE]),
        Some(ASSERT_HEIGHT_RELATIVE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_HEIGHT_ABSOLUTE]),
        Some(ASSERT_HEIGHT_ABSOLUTE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_BEFORE_SECONDS_RELATIVE]),
        Some(ASSERT_BEFORE_SECONDS_RELATIVE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_BEFORE_SECONDS_ABSOLUTE]),
        Some(ASSERT_BEFORE_SECONDS_ABSOLUTE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_BEFORE_HEIGHT_RELATIVE]),
        Some(ASSERT_BEFORE_HEIGHT_RELATIVE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_BEFORE_HEIGHT_ABSOLUTE]),
        Some(ASSERT_BEFORE_HEIGHT_ABSOLUTE)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_CONCURRENT_SPEND]),
        Some(ASSERT_CONCURRENT_SPEND)
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_CONCURRENT_PUZZLE]),
        Some(ASSERT_CONCURRENT_PUZZLE)
    );

    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ALWAYS_TRUE]),
        Some(ALWAYS_TRUE)
    );
    // leading zeros are not allowed, it makes it a different value
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[ASSERT_HEIGHT_ABSOLUTE, 0]),
        None
    );
    assert_eq!(
        opcode_tester_with_assert_before(&mut a, &[0, ASSERT_HEIGHT_ABSOLUTE]),
        None
    );
    assert_eq!(opcode_tester_with_assert_before(&mut a, &[0]), None);

    // a pair is never a valid condition
    let v1 = a.new_atom(&[0]).unwrap();
    let v2 = a.new_atom(&[0]).unwrap();
    let p = a.new_pair(v1, v2).unwrap();
    assert_eq!(parse_opcode(&a, p, 0), None);
    assert_eq!(parse_opcode(&a, p, ENABLE_ASSERT_BEFORE), None);
}