From 47cba7a6551709107ac74f9509851e123adfc9c3 Mon Sep 17 00:00:00 2001
From: Marko Bencun <marko@shiftcrypto.ch>
Date: Mon, 24 Jun 2024 13:49:57 +0200
Subject: [PATCH] bip32: add from_32_slice method to DerivationPath

ChildNumber has a `From<u32>` impl, but converting `&[u32]` to a
`DerivationPath` was still difficult.
---
 bitcoin/src/bip32.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/bitcoin/src/bip32.rs b/bitcoin/src/bip32.rs
index 6ace63289..a3667d640 100644
--- a/bitcoin/src/bip32.rs
+++ b/bitcoin/src/bip32.rs
@@ -453,6 +453,19 @@ impl DerivationPath {
     /// assert_eq!(path.to_u32_vec(), vec![84 + HARDENED, HARDENED, HARDENED, 0, 1]);
     /// ```
     pub fn to_u32_vec(&self) -> Vec<u32> { self.into_iter().map(|&el| el.into()).collect() }
+
+    /// Creates a derivation path from a slice of u32s.
+    /// ```
+    /// use bitcoin::bip32::DerivationPath;
+    ///
+    /// const HARDENED: u32 = 0x80000000;
+    /// let expected = vec![84 + HARDENED, HARDENED, HARDENED, 0, 1];
+    /// let path = DerivationPath::from_u32_slice(expected.as_slice());
+    /// assert_eq!(path.to_u32_vec(), expected);
+    /// ```
+    pub fn from_u32_slice(numbers: &[u32]) -> Self {
+        numbers.iter().map(|&n| ChildNumber::from(n)).collect()
+    }
 }
 
 impl fmt::Display for DerivationPath {