Trait sp_core::crypto::Derive

pub trait Derive: Sized {
    fn derive<Iter: Iterator<Item = DeriveJunction>>(
        &self,
        _path: Iter
    ) -> Option<Self> { ... }
}

Derivable key trait.

Provided Methods

fn derive<Iter: Iterator<Item = DeriveJunction>>(
    &self,
    _path: Iter
) -> Option<Self>

Derive a child key from a series of given junctions.

Will be None for public keys if there are any hard junctions in there.

Examples found in repository

src/crypto.rs (line 434)

	fn from_string(s: &str) -> Result<Self, PublicError> {
		let cap = SS58_REGEX.captures(s).ok_or(PublicError::InvalidFormat)?;
		let s = cap.name("ss58").map(|r| r.as_str()).unwrap_or(DEV_ADDRESS);
		let addr = if let Some(stripped) = s.strip_prefix("0x") {
			let d = array_bytes::hex2bytes(stripped).map_err(|_| PublicError::InvalidFormat)?;
			Self::from_slice(&d).map_err(|()| PublicError::BadLength)?
		} else {
			Self::from_ss58check(s)?
		};
		if cap["path"].is_empty() {
			Ok(addr)
		} else {
			let path =
				JUNCTION_REGEX.captures_iter(&cap["path"]).map(|f| DeriveJunction::from(&f[1]));
			addr.derive(path).ok_or(PublicError::InvalidPath)
		}
	}

	fn from_string_with_version(s: &str) -> Result<(Self, Ss58AddressFormat), PublicError> {
		let cap = SS58_REGEX.captures(s).ok_or(PublicError::InvalidFormat)?;
		let (addr, v) = Self::from_ss58check_with_version(
			cap.name("ss58").map(|r| r.as_str()).unwrap_or(DEV_ADDRESS),
		)?;
		if cap["path"].is_empty() {
			Ok((addr, v))
		} else {
			let path =
				JUNCTION_REGEX.captures_iter(&cap["path"]).map(|f| DeriveJunction::from(&f[1]));
			addr.derive(path).ok_or(PublicError::InvalidPath).map(|a| (a, v))
		}
	}

Implementors

impl Derive for sp_core::ecdsa::Public

impl Derive for sp_core::ed25519::Public

impl Derive for sp_core::sr25519::Public

impl Derive for Dummy