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improve example: take hex-encoded seed instead of WIF in bip32 example #760

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Merged
merged 1 commit into from
Jan 10, 2022
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improve example: take hex-encoded seed instead of WIF in bip32 example #760

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4 changes: 2 additions & 2 deletions contrib/test.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -56,8 +56,8 @@ echo "********* Testing no-std build *************"
cargo build --verbose --features="no-std $feature"
done

cargo run --example bip32 L1HKVVLHXiUhecWnwFYF6L3shkf1E12HUmuZTESvBXUdx3yqVP1D
cargo run --no-default-features --features no-std --example bip32 L1HKVVLHXiUhecWnwFYF6L3shkf1E12HUmuZTESvBXUdx3yqVP1D
cargo run --example bip32 7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd
cargo run --no-default-features --features no-std --example bip32 7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd
fi

# Test each feature
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24 changes: 12 additions & 12 deletions examples/bip32.rs
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Expand Up @@ -4,37 +4,37 @@ use std::{env, process};
use std::str::FromStr;

use bitcoin::secp256k1::Secp256k1;
use bitcoin::{PrivateKey, PublicKey};
use bitcoin::PublicKey;
use bitcoin::util::bip32::ExtendedPrivKey;
use bitcoin::util::bip32::ExtendedPubKey;
use bitcoin::util::bip32::DerivationPath;
use bitcoin::util::bip32::ChildNumber;
use bitcoin::util::address::Address;
use bitcoin::secp256k1::ffi::types::AlignedType;
use bitcoin::hashes::hex::FromHex;

fn main() {
// This example derives root xprv
// from a 32-byte secret of the input WIF string,
// This example derives root xprv from a 32-byte seed,
// derives the child xprv with path m/84h/0h/0h,
// prints out corresponding xpub,
// calculates and prints out the first receiving segwit address.
// Run this example with cargo and WIF argument:
// cargo run --example bip32 L1HKVVLHXiUhecWnwFYF6L3shkf1E12HUmuZTESvBXUdx3yqVP1D
// Run this example with cargo and seed(hex-encoded) argument:
// cargo run --example bip32 7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd

let args: Vec<String> = env::args().collect();
if args.len() < 2 {
eprintln!("not enough arguments. usage: {} <WIF>", &args[0]);
eprintln!("not enough arguments. usage: {} <hex-encoded 32-byte seed>", &args[0]);
process::exit(1);
}

let wif = PrivateKey::from_wif(&args[1]).unwrap();
println!("Seed WIF: {}", wif);
let seed_hex = &args[1];
println!("Seed: {}", seed_hex);

// use the network from WIF key
let network = wif.network;
// default network as mainnet
let network = bitcoin::Network::Bitcoin;
println!("Network: {:?}", network);
// seed is a 32-byte secret in WIF
let seed = wif.to_bytes();

let seed = Vec::from_hex(seed_hex).unwrap();

// we need secp256k1 context for key derivation
let mut buf: Vec<AlignedType> = Vec::new();
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