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
|
use proc_macro::TokenStream;
use proc_macro2::TokenStream as TokenStream2;
use quote::quote;
#[path = "../../../../guests_macro/src/parse_fn.rs"]
mod parse_fn;
use crate::parse_fn::{args_divide, args_split, group_streams, split_fn};
/// Create a set of three helper functions.
///
/// First a function called "guest" with the same arguments and return types
/// as our specific guest's entrypoint function, which calls the aforementioned
/// entrypoint function.
///
/// In essence, we create a wrapper function around the entrypoint, which also
/// has the required `jolt::provable` attribute.
///
/// Second is a `guests_closure` function, almost identical to Jolt's
/// `build_guest` function, which takes an already built guest ELF.
/// Since we're following Jolt's design, it uses a third generated function,
/// called `preprocess_guest_elf`.
///
/// # Usage
///
/// Inside Jolt's guest (excluding the `entrypoint_expr` call):
///
/// ```rust
/// make_wrapper!{fn main(...) -> ...}
/// ```
///
/// # Example output
///
/// ```rust
/// #[jolt::provable(max_input_size = 100000)]
/// fn guest(...) -> ... {
/// zkp::main(...)
/// }
///
/// #[cfg(all(not(target_arch = "wasm32"), not(feature = "guest")))]
/// pub fn guest_closures(elf_path: String) -> (...) { ..... }
///
/// #[cfg(all(not(target_arch = "wasm32"), not(feature = "guest")))]
/// pub fn preprocess_guest_elf(elf_path: String) -> (...) { ..... }
/// ```
#[proc_macro]
pub fn make_wrapper(item: TokenStream) -> TokenStream {
let (name, args, ret) = split_fn(&item);
let (patterns, types) = args_divide(&args);
let ts_patterns = group_streams(&patterns);
let ts_types = group_streams(&types);
let mut out = TokenStream::new();
out.extend(format!("zkp::{}{}", name, ts_patterns).parse::<TokenStream>());
let mut func = TokenStream::new();
func.extend(
format!(
"#[jolt::provable(max_input_size = 100000)] fn guest{} -> {} {{ {} }}",
args, ret, out
)
.parse::<TokenStream>(),
);
func.extend(make_build_fn(
patterns.clone(),
types.clone(),
ts_patterns.clone(),
ts_types.clone(),
ret.clone(),
));
func.extend(make_preprocess_fn(
patterns,
types,
ts_patterns,
ts_types,
ret,
));
func
}
// Modified copies of
// https://github.com/a16z/jolt/blob/fa45507aaddb1815bafd54332e4b14173a7f8699/jolt-sdk/macros/src/lib.rs
fn make_build_fn(
patterns: Vec<TokenStream>,
types: Vec<TokenStream>,
ts_patterns: TokenStream,
ts_types: TokenStream,
ret: TokenStream,
) -> TokenStream {
let patterns = patterns.iter().map(|p| TokenStream2::from(p.clone()));
let types = types.iter().map(|t| TokenStream2::from(t.clone()));
let ts_patterns = TokenStream2::from(ts_patterns);
let ts_types = TokenStream2::from(ts_types);
let ret = if ret.is_empty() {
quote! { () }
} else {
TokenStream2::from(ret)
};
let imports = make_imports();
quote! {
#[cfg(all(not(target_arch = "wasm32"), not(feature = "guest")))]
pub fn guest_closures(elf_path: String) -> (
impl Fn(#ts_types) -> (#ret, jolt::JoltHyperKZGProof) + Sync + Send,
impl Fn(jolt::JoltHyperKZGProof) -> bool + Sync + Send
) {
#imports
let (program, preprocessing) = preprocess_guest_elf(elf_path);
let program = std::sync::Arc::new(program);
let preprocessing = std::sync::Arc::new(preprocessing);
let program_cp = program.clone();
let preprocessing_cp = preprocessing.clone();
let prove_closure = move |args: #ts_types| {
let program = (*program).clone();
let preprocessing = (*preprocessing).clone();
let #ts_patterns = args;
prove_guest(program, preprocessing, #(#patterns),*)
};
let verify_closure = move |proof: jolt::JoltHyperKZGProof| {
let program = (*program_cp).clone();
let preprocessing = (*preprocessing_cp).clone();
RV32IJoltVM::verify(preprocessing, proof.proof, proof.commitments, None).is_ok()
};
(prove_closure, verify_closure)
}
}
.into()
}
fn make_preprocess_fn(
patterns: Vec<TokenStream>,
types: Vec<TokenStream>,
ts_patterns: TokenStream,
ts_types: TokenStream,
ret: TokenStream,
) -> TokenStream {
let patterns = patterns.iter().map(|p| TokenStream2::from(p.clone()));
let types = types.iter().map(|t| TokenStream2::from(t.clone()));
let ts_patterns = TokenStream2::from(ts_patterns);
let ts_types = TokenStream2::from(ts_types);
let ret = if ret.is_empty() {
quote! { () }
} else {
TokenStream2::from(ret)
};
let imports = make_imports();
quote! {
#[cfg(all(not(target_arch = "wasm32"), not(feature = "guest")))]
pub fn preprocess_guest_elf(elf_path: String) -> (
jolt::host::Program,
jolt::JoltPreprocessing<4, jolt::F, jolt::PCS, jolt::ProofTranscript>
) {
#imports
use std::{ path::PathBuf, str::FromStr };
let mut program = Program::new("guest");
program.set_func("guest");
program.elf = Some(PathBuf::from_str(&elf_path).unwrap());
program.set_std(true);
program.set_memory_size(10485760);
program.set_stack_size(4096);
program.set_max_input_size(100000u64);
program.set_max_output_size(4096u64);
let (bytecode, memory_init) = program.decode();
let memory_layout = MemoryLayout::new(100000u64, 4096u64);
let preprocessing: JoltPreprocessing<4, jolt::F, jolt::PCS, jolt::ProofTranscript> =
RV32IJoltVM::preprocess(
bytecode,
memory_layout,
memory_init,
1 << 20,
1 << 20,
1 << 24
);
(program, preprocessing)
}
}
.into()
}
fn make_imports() -> TokenStream2 {
quote! {
#[cfg(not(feature = "guest"))]
use jolt::{
JoltField,
host::Program,
JoltPreprocessing,
Jolt,
JoltCommitments,
ProofTranscript,
RV32IJoltVM,
RV32I,
RV32IJoltProof,
BytecodeRow,
MemoryOp,
MemoryLayout,
MEMORY_OPS_PER_INSTRUCTION,
instruction::add::ADDInstruction,
tracer,
};
}
}
|
