leo_ast/constructor/
checksum.rs

1// Copyright (C) 2019-2025 Provable Inc.
2// This file is part of the Leo library.
3
4// The Leo library is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8
9// The Leo library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License
15// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
16
17/// This is the required snarkVM constructor bytecode for a program that is only upgradable
18/// if the new program's checksum matches the one declared in a pre-determined mapping.
19pub fn snarkvm_checksum_constructor(mapping: impl std::fmt::Display, key: impl std::fmt::Display) -> String {
20    format!(
21        r"
22constructor:
23    branch.eq edition 0u16 to end;
24    get {mapping}[{key}] into r0;
25    assert.eq checksum r0;
26    position end;
27"
28    )
29}
leo_ast/constructor/checksum.rs

leo_ast/constructor/
checksum.rs
