From e4284860022f019c0db40449373f2ecb21bcc06a Mon Sep 17 00:00:00 2001
From: Martin Habovstiak <martin.habovstiak@gmail.com>
Date: Thu, 22 Dec 2022 17:55:19 +0100
Subject: [PATCH] Add `from_bytes(Vec<u8>)` to `ScriptBuf`

This is useful when one already has bytes allocated in a vec that can be
reused.

The change also documents that the mirror method `into_bytes()` doesn't
allocate.
---
 bitcoin/src/blockdata/script.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/bitcoin/src/blockdata/script.rs b/bitcoin/src/blockdata/script.rs
index dc3a0f91..fc5fb5e7 100644
--- a/bitcoin/src/blockdata/script.rs
+++ b/bitcoin/src/blockdata/script.rs
@@ -1163,7 +1163,16 @@ impl ScriptBuf {
             .into_script()
     }
 
+    /// Converts byte vector into script.
+    ///
+    /// This method doesn't (re)allocate.
+    pub fn from_bytes(bytes: Vec<u8>) -> Self {
+        ScriptBuf(bytes)
+    }
+
     /// Converts the script into a byte vector.
+    ///
+    /// This method doesn't (re)allocate.
     pub fn into_bytes(self) -> Vec<u8> { self.0 }
 
     /// Computes the P2SH output corresponding to this redeem script.