-
Notifications
You must be signed in to change notification settings - Fork 25
/
mod.rs
326 lines (291 loc) · 11 KB
/
mod.rs
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
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
use super::*;
use boojum::gadgets::traits::auxiliary::PrettyComparison;
use cs_derive::*;
use boojum::cs::gates::ConstantAllocatableCS;
use boojum::cs::traits::cs::ConstraintSystem;
use boojum::cs::Variable;
use boojum::field::SmallField;
use boojum::gadgets::boolean::Boolean;
use boojum::gadgets::num::Num;
use boojum::gadgets::traits::allocatable::CSAllocatable;
use boojum::gadgets::traits::allocatable::CSPlaceholder;
use boojum::gadgets::traits::encodable::CircuitVarLengthEncodable;
use boojum::gadgets::traits::round_function::CircuitRoundFunction;
use boojum::gadgets::traits::selectable::Selectable;
use boojum::gadgets::traits::witnessable::WitnessHookable;
use boojum::gadgets::u32::UInt32;
use boojum::serde_utils::BigArraySerde;
pub mod circuit_inputs;
#[derive(Derivative, CSAllocatable, WitnessHookable)]
#[WitnessHookBound(
"
where
<T as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<IN as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<OUT as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
"
)]
#[derivative(Clone, Debug)]
pub struct ClosedFormInput<
F: SmallField,
T: Clone + std::fmt::Debug + CSAllocatable<F> + CircuitVarLengthEncodable<F> + WitnessHookable<F>,
IN: Clone + std::fmt::Debug + CSAllocatable<F> + CircuitVarLengthEncodable<F> + WitnessHookable<F>,
OUT: Clone + std::fmt::Debug + CSAllocatable<F> + CircuitVarLengthEncodable<F> + WitnessHookable<F>,
> where
<T as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<IN as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<OUT as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
{
pub start_flag: Boolean<F>,
pub completion_flag: Boolean<F>,
pub observable_input: IN,
pub observable_output: OUT,
pub hidden_fsm_input: T,
pub hidden_fsm_output: T,
}
impl<
F: SmallField,
T: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
IN: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
OUT: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
> ClosedFormInput<F, T, IN, OUT>
where
<T as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<IN as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<OUT as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
{
pub fn alloc_ignoring_outputs<CS: ConstraintSystem<F>>(
cs: &mut CS,
witness: ClosedFormInputWitness<F, T, IN, OUT>,
) -> Self
where
T: CSPlaceholder<F>,
OUT: CSPlaceholder<F>,
{
let start_flag = Boolean::allocate(cs, witness.start_flag);
let observable_input = IN::allocate(cs, witness.observable_input.clone());
let hidden_fsm_input = T::allocate(cs, witness.hidden_fsm_input.clone());
let boolean_false = Boolean::allocated_constant(cs, false);
let observable_output = OUT::placeholder(cs);
let hidden_fsm_output = T::placeholder(cs);
let new = Self {
start_flag,
completion_flag: boolean_false,
observable_input,
observable_output,
hidden_fsm_input,
hidden_fsm_output,
};
new
}
#[track_caller]
pub fn hook_compare_witness<CS: ConstraintSystem<F>>(
&self,
cs: &CS,
expected: &<ClosedFormInput<F, T, IN, OUT> as CSAllocatable<F>>::Witness,
) where
T: PrettyComparison<F>,
OUT: PrettyComparison<F>,
{
if let Some(circuit_result) = (self.witness_hook(&*cs))() {
let comparison_lines = <T as PrettyComparison<F>>::find_diffs(
&circuit_result.hidden_fsm_output,
&expected.hidden_fsm_output,
);
if comparison_lines.is_empty() == false {
panic!(
"Difference in FSM. Left is circuit, right is expected:\n{}",
comparison_lines.join("\n")
);
}
let comparison_lines = <OUT as PrettyComparison<F>>::find_diffs(
&circuit_result.observable_output,
&expected.observable_output,
);
if comparison_lines.is_empty() == false {
panic!(
"Difference in observable output. Left is circuit, right is expected:\n{}",
comparison_lines.join("\n")
);
}
assert_eq!(&circuit_result, expected);
}
}
}
pub const CLOSED_FORM_COMMITTMENT_LENGTH: usize = 4;
impl<
F: SmallField,
T: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
IN: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
OUT: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
> std::default::Default for ClosedFormInputWitness<F, T, IN, OUT>
where
<T as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<IN as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<OUT as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
{
fn default() -> Self {
ClosedFormInput::<F, T, IN, OUT>::placeholder_witness()
}
}
#[derive(Derivative, CSAllocatable, CSSelectable, CSVarLengthEncodable, WitnessHookable)]
#[derivative(Clone, Debug)]
pub struct ClosedFormInputCompactForm<F: SmallField> {
pub start_flag: Boolean<F>,
pub completion_flag: Boolean<F>,
pub observable_input_committment: [Num<F>; CLOSED_FORM_COMMITTMENT_LENGTH],
pub observable_output_committment: [Num<F>; CLOSED_FORM_COMMITTMENT_LENGTH],
pub hidden_fsm_input_committment: [Num<F>; CLOSED_FORM_COMMITTMENT_LENGTH],
pub hidden_fsm_output_committment: [Num<F>; CLOSED_FORM_COMMITTMENT_LENGTH],
}
impl<F: SmallField> ClosedFormInputCompactForm<F> {
pub fn from_full_form<
CS: ConstraintSystem<F>,
T: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
IN: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
OUT: Clone
+ std::fmt::Debug
+ CSAllocatable<F>
+ CircuitVarLengthEncodable<F>
+ WitnessHookable<F>,
R: CircuitRoundFunction<F, 8, 12, 4>,
>(
cs: &mut CS,
full_form: &ClosedFormInput<F, T, IN, OUT>,
round_function: &R,
) -> Self
where
<T as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<IN as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
<OUT as CSAllocatable<F>>::Witness: serde::Serialize + serde::de::DeserializeOwned + Eq,
{
let observable_input_committment =
commit_variable_length_encodable_item(cs, &full_form.observable_input, round_function);
let observable_output_committment =
commit_variable_length_encodable_item(cs, &full_form.observable_output, round_function);
let hidden_fsm_input_committment =
commit_variable_length_encodable_item(cs, &full_form.hidden_fsm_input, round_function);
let hidden_fsm_output_committment =
commit_variable_length_encodable_item(cs, &full_form.hidden_fsm_output, round_function);
// mask FSM part. Observable part is NEVER masked
let zero_num = Num::zero(cs);
let empty_committment = [zero_num; CLOSED_FORM_COMMITTMENT_LENGTH];
let hidden_fsm_input_committment = Num::parallel_select(
cs,
full_form.start_flag,
&empty_committment,
&hidden_fsm_input_committment,
);
// mask output. Observable output is zero is not the last indeed
let observable_output_committment = Num::parallel_select(
cs,
full_form.completion_flag,
&observable_output_committment,
&empty_committment,
);
// and vice versa for FSM
let hidden_fsm_output_committment = Num::parallel_select(
cs,
full_form.completion_flag,
&empty_committment,
&hidden_fsm_output_committment,
);
let new = Self {
start_flag: full_form.start_flag,
completion_flag: full_form.completion_flag,
observable_input_committment,
observable_output_committment,
hidden_fsm_input_committment,
hidden_fsm_output_committment,
};
new
}
}
pub fn commit_variable_length_encodable_item<
F: SmallField,
CS: ConstraintSystem<F>,
T: CircuitVarLengthEncodable<F>,
const AW: usize,
const SW: usize,
const CW: usize,
const N: usize,
R: CircuitRoundFunction<F, AW, SW, CW>,
>(
cs: &mut CS,
item: &T,
_round_function: &R,
) -> [Num<F>; N] {
let expected_length = item.encoding_length();
let mut buffer = Vec::with_capacity(expected_length);
item.encode_to_buffer(cs, &mut buffer);
assert_eq!(buffer.len(), expected_length);
commit_encoding::<F, CS, AW, SW, CW, N, R>(cs, &buffer, _round_function)
}
pub fn commit_encoding<
F: SmallField,
CS: ConstraintSystem<F>,
const AW: usize,
const SW: usize,
const CW: usize,
const N: usize,
R: CircuitRoundFunction<F, AW, SW, CW>,
>(
cs: &mut CS,
input: &[Variable],
_round_function: &R,
) -> [Num<F>; N] {
// we use length specialization here
let expected_length = input.len();
let mut state = R::create_empty_state(cs);
let length = UInt32::allocated_constant(cs, expected_length as u32);
R::apply_length_specialization(cs, &mut state, length.get_variable());
// pad with zeroes
let mut buffer_length = expected_length / AW;
if expected_length % AW != 0 {
buffer_length += 1;
}
buffer_length *= AW;
let mut buffer = Vec::with_capacity(buffer_length);
buffer.extend_from_slice(input);
let zero_var = cs.allocate_constant(F::ZERO);
buffer.resize(buffer_length, zero_var);
for chunk in buffer.array_chunks::<AW>() {
let capacity_els = R::split_capacity_elements(&state);
state = R::absorb_with_replacement(cs, *chunk, capacity_els);
state = R::compute_round_function(cs, state);
}
let output = R::state_into_commitment::<N>(&state);
output.map(|el| Num::from_variable(el))
}