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Merge pull request #122 from dongcarl/childnumber-fixes 

Add conversion between u32 and ChildNumber, fix docs
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Andrew Poelstra 2018-08-10 22:46:22 +00:00 committed by GitHub
parent 45c699f005 d4f28b6785
commit 6c53593d5f
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1 changed files with 21 additions and 2 deletions
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23
src/util/bip32.rs
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@ -90,10 +90,29 @@ pub struct ExtendedPubKey {
/// A child number for a derived key /// A child number for a derived key
#[derive(Copy, Clone, PartialEq, Eq, Debug)] #[derive(Copy, Clone, PartialEq, Eq, Debug)]
pub enum ChildNumber { pub enum ChildNumber {
/// Hardened key index, within [0, 2^31 - 1]
Hardened(u32),
/// Non-hardened key, within [0, 2^31 - 1] /// Non-hardened key, within [0, 2^31 - 1]
Normal(u32), Normal(u32),
/// Hardened key index, within [2^31, 2^32 - 1]
Hardened(u32),
}
impl From<u32> for ChildNumber {
fn from(index: u32) -> Self {
if index & (1 << 31) != 0 {
ChildNumber::Hardened(index)
} else {
ChildNumber::Normal(index)
}
}
}
impl From<ChildNumber> for u32 {
fn from(cnum: ChildNumber) -> Self {
match cnum {
ChildNumber::Normal(index) => index,
ChildNumber::Hardened(index) => index,
}
}
} }
impl fmt::Display for ChildNumber { impl fmt::Display for ChildNumber {