Function export_hex 

pub fn export_hex(key: &PrivateKey, options: HexOptions) -> String

Export a private key to hex format.

Example

use rustywallet_export::{export_hex, HexOptions};
use rustywallet_keys::prelude::PrivateKey;

let key = PrivateKey::random();

// Default: lowercase, no prefix
let hex = export_hex(&key, HexOptions::new());
assert_eq!(hex.len(), 64);

// With 0x prefix
let hex = export_hex(&key, HexOptions::new().with_prefix(true));
assert!(hex.starts_with("0x"));
assert_eq!(hex.len(), 66);

// Uppercase
let hex = export_hex(&key, HexOptions::new().with_uppercase(true));
assert!(hex.chars().all(|c| !c.is_ascii_lowercase() || !c.is_alphabetic()));