bitcoin: Add default arg to bip32 example
What the developer wrote
Authored by Tobin C. Harding
bitcoin: Add default arg to bip32 example
Use the documented seed hex string as default if one is not passed in.
This allows us to simplify running this example in CI.
What changed, and why it matters
This change only touches an example program used for documentation and CI demos. It makes the seed argument optional by providing a documented default value. There is no security issue: the seed was already hard-coded in the comment above, and the example is not production code.
No action required. This is a benign example/CI convenience change.
Security signals we found
No strong security signals were identified.
Evidence from the diff
The patch modifies bitcoin/examples/bip32.rs to remove a usage error/exit path and instead fall back to a default hex seed string when no CLI argument is supplied. The default string is identical to the one already shown in the file’s comment. No cryptographic, network, or library code is changed.
Changed components
bitcoin/examples/bip32.rsInspect captured patch +6 / −6
diff --git a/bitcoin/examples/bip32.rs b/bitcoin/examples/bip32.rs
index 886a0303..2786ad61 100644
--- a/bitcoin/examples/bip32.rs
+++ b/bitcoin/examples/bip32.rs
@@ -1,4 +1,4 @@
-use std::{env, process};
+use std::env;
use bitcoin::address::{Address, KnownHrp};
use bitcoin::bip32::{ChildNumber, DerivationPath, Xpriv, Xpub};
@@ -14,12 +14,12 @@ fn main() {
// cargo run --example bip32 7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd
let args: Vec<String> = env::args().collect();
- if args.len() < 2 {
- eprintln!("not enough arguments. usage: {} <hex-encoded 32-byte seed>", &args[0]);
- process::exit(1);
- }
+ let seed_hex = if args.len() < 2 {
+ "7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd"
+ } else {
+ &args[1]
+ };
- let seed_hex = &args[1];
println!("Seed: {seed_hex}");
println!("Using mainnet network");
Why this scored 15/100
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