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use std::fmt;
use std::ops::Deref;
use std::str::FromStr;
use secp256k1::key;
use bigint::hash::H256;
use {Error};
#[derive(Clone, PartialEq, Eq)]
pub struct Secret {
inner: H256,
}
impl fmt::Debug for Secret {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(fmt, "Secret: 0x{:x}{:x}..{:x}{:x}", self.inner[0], self.inner[1], self.inner[30], self.inner[31])
}
}
impl Secret {
fn from_slice_unchecked(key: &[u8]) -> Self {
assert_eq!(32, key.len(), "Caller should provide 32-byte length slice");
let mut h = H256::default();
h.copy_from_slice(&key[0..32]);
Secret { inner: h }
}
pub fn from_slice(key: &[u8]) -> Result<Self, Error> {
let secret = key::SecretKey::from_slice(&super::SECP256K1, key)?;
Ok(secret.into())
}
}
impl FromStr for Secret {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let hash = H256::from_str(s).map_err(|e| Error::Custom(format!("{:?}", e)))?;
Self::from_slice(&hash)
}
}
impl From<key::SecretKey> for Secret {
fn from(key: key::SecretKey) -> Self {
Self::from_slice_unchecked(&key[0..32])
}
}
impl Deref for Secret {
type Target = H256;
fn deref(&self) -> &Self::Target {
&self.inner
}
}