Function build_nef_with_tokens 

pub fn build_nef_with_tokens(
    script: &[u8],
    compiler: &str,
    source: &str,
    tokens: &[MethodToken],
) -> Result<Vec<u8>, String>

Build a NEF file with method tokens for cross-contract calls.

Arguments

• script - The NeoVM bytecode
• compiler - Compiler identifier string (max 64 bytes)
• source - Optional source URL (max 256 bytes)
• tokens - Array of method tokens for cross-contract calls

Returns

Complete NEF file as byte vector