snarkvm_synthesizer_program/finalize/
bytes.rs

1// Copyright (c) 2019-2025 Provable Inc.
2// This file is part of the snarkVM library.
3
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at:
7
8// http://www.apache.org/licenses/LICENSE-2.0
9
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15
16use super::*;
17
18impl<N: Network, Command: CommandTrait<N>> FromBytes for FinalizeCore<N, Command> {
19    /// Reads the finalize from a buffer.
20    #[inline]
21    fn read_le<R: Read>(mut reader: R) -> IoResult<Self> {
22        // Read the associated function name.
23        let name = Identifier::<N>::read_le(&mut reader)?;
24
25        // Read the inputs.
26        let num_inputs = u16::read_le(&mut reader)?;
27        if num_inputs > u16::try_from(N::MAX_INPUTS).map_err(error)? {
28            return Err(error(format!("Failed to deserialize finalize: too many inputs ({num_inputs})")));
29        }
30        let mut inputs = Vec::with_capacity(num_inputs as usize);
31        for _ in 0..num_inputs {
32            inputs.push(Input::read_le(&mut reader)?);
33        }
34
35        // Read the commands.
36        let num_commands = u16::read_le(&mut reader)?;
37        if num_commands.is_zero() {
38            return Err(error("Failed to deserialize finalize: needs at least one command".to_string()));
39        }
40        if num_commands > u16::try_from(N::MAX_COMMANDS).map_err(error)? {
41            return Err(error(format!("Failed to deserialize finalize: too many commands ({num_commands})")));
42        }
43        let mut commands = Vec::with_capacity(num_commands as usize);
44        for _ in 0..num_commands {
45            commands.push(Command::read_le(&mut reader)?);
46        }
47
48        // Initialize a new finalize.
49        let mut finalize = Self::new(name);
50        inputs.into_iter().try_for_each(|input| finalize.add_input(input)).map_err(error)?;
51        commands.into_iter().try_for_each(|command| finalize.add_command(command)).map_err(error)?;
52
53        Ok(finalize)
54    }
55}
56
57impl<N: Network, Command: CommandTrait<N>> ToBytes for FinalizeCore<N, Command> {
58    /// Writes the finalize to a buffer.
59    #[inline]
60    fn write_le<W: Write>(&self, mut writer: W) -> IoResult<()> {
61        // Write the associated function name.
62        self.name.write_le(&mut writer)?;
63
64        // Write the number of inputs for the finalize.
65        let num_inputs = self.inputs.len();
66        match num_inputs <= N::MAX_INPUTS {
67            true => u16::try_from(num_inputs).map_err(error)?.write_le(&mut writer)?,
68            false => return Err(error(format!("Failed to write {num_inputs} inputs as bytes"))),
69        }
70
71        // Write the inputs.
72        for input in self.inputs.iter() {
73            input.write_le(&mut writer)?;
74        }
75
76        // Write the number of commands for the finalize.
77        let num_commands = self.commands.len();
78        match 0 < num_commands && num_commands <= N::MAX_COMMANDS {
79            true => u16::try_from(num_commands).map_err(error)?.write_le(&mut writer)?,
80            false => return Err(error(format!("Failed to write {num_commands} commands as bytes"))),
81        }
82
83        // Write the commands.
84        for command in self.commands.iter() {
85            command.write_le(&mut writer)?;
86        }
87
88        Ok(())
89    }
90}
91
92#[cfg(test)]
93mod tests {
94    use super::*;
95    use crate::Finalize;
96    use console::network::MainnetV0;
97
98    type CurrentNetwork = MainnetV0;
99
100    #[test]
101    fn test_finalize_bytes() -> Result<()> {
102        let finalize_string = r"
103finalize main:
104    input r0 as field.public;
105    input r1 as field.public;
106    add r0 r1 into r2;
107    add r0 r1 into r3;
108    add r0 r1 into r4;
109    add r0 r1 into r5;
110    add r0 r1 into r6;
111    add r0 r1 into r7;
112    add r0 r1 into r8;
113    add r0 r1 into r9;
114    add r0 r1 into r10;
115    add r0 r1 into r11;
116    get accounts[r0] into r12;
117    get accounts[r1] into r13;";
118
119        let expected = Finalize::<CurrentNetwork>::from_str(finalize_string)?;
120        let expected_bytes = expected.to_bytes_le()?;
121        println!("String size: {:?}, Bytecode size: {:?}", finalize_string.as_bytes().len(), expected_bytes.len());
122
123        let candidate = Finalize::<CurrentNetwork>::from_bytes_le(&expected_bytes)?;
124        assert_eq!(expected.to_string(), candidate.to_string());
125        assert_eq!(expected_bytes, candidate.to_bytes_le()?);
126        Ok(())
127    }
128}
snarkvm_synthesizer_program/finalize/bytes.rs

snarkvm_synthesizer_program/finalize/
bytes.rs
