From 252053c3d63788d40226a7b3a2c95b487f1b2ac5 Mon Sep 17 00:00:00 2001
From: "Jamil Lambert, PhD" <Jamil.Lambert@proton.me>
Date: Mon, 27 Jan 2025 20:42:33 +0000
Subject: [PATCH] Add `from_u8_masked` `RecoveryId` constructor
Add an infallible constructor that takes a u8 and masks off the top 6
bits.
---
src/ecdsa/recovery.rs | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/src/ecdsa/recovery.rs b/src/ecdsa/recovery.rs
index 04aaf3690..6a2ebd49f 100644
--- a/src/ecdsa/recovery.rs
+++ b/src/ecdsa/recovery.rs
@@ -25,6 +25,19 @@ pub enum RecoveryId {
Three,
}
+impl RecoveryId {
+ /// Creates a `RecoveryId` from a `u8` value by masking off the top 6 bits.
+ #[inline]
+ pub const fn from_u8_masked(id: u8) -> RecoveryId {
+ match id & 0x03 {
+ 0 => RecoveryId::Zero,
+ 1 => RecoveryId::One,
+ 2 => RecoveryId::Two,
+ _ => RecoveryId::Three,
+ }
+ }
+}
+
impl TryFrom<i32> for RecoveryId {
type Error = Error;
#[inline]