neo-decompiler 0.10.2

Neo N3 NEF decompiler: parse, disassemble, lift bytecode to high-level pseudocode and C# skeletons, with a CLI, JSON reports, and optional WebAssembly bindings.
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

use crate::manifest::{ContractManifest, ManifestMethod};

/// Return the ABI method that matches the script entry offset, falling back to
/// the first ABI method when all ABI offsets are missing.
pub(in super::super::super) fn find_manifest_entry_method(
    manifest: &ContractManifest,
    entry_offset: usize,
) -> Option<(&ManifestMethod, bool)> {
    if let Some(method) = manifest
        .abi
        .methods
        .iter()
        .find(|method| offset_as_usize(method.offset) == Some(entry_offset))
    {
        return Some((method, true));
    }

    if manifest
        .abi
        .methods
        .iter()
        .any(|method| offset_as_usize(method.offset).is_some())
    {
        return None;
    }

    manifest.abi.methods.first().map(|method| (method, false))
}

/// Convert a manifest offset (`Option<i32>`) to `Option<usize>`, treating
/// negative values (e.g. `-1` for abstract methods) as `None`.
pub(in super::super::super) fn offset_as_usize(offset: Option<i32>) -> Option<usize> {
    offset.and_then(|v| usize::try_from(v).ok())
}