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use data_encoding::BASE64;
use thiserror::Error;
// FUTUREWORK: make generic
#[derive(PartialEq, Eq, Hash, Debug)]
pub struct B3Digest(Vec<u8>);
// TODO: allow converting these errors to crate::Error
#[derive(Error, Debug)]
pub enum Error {
#[error("invalid digest length: {0}")]
InvalidDigestLen(usize),
}
impl B3Digest {
// constructs a [B3Digest] from a [Vec<u8>].
// Returns an error if the digest has the wrong length.
pub fn from_vec(value: Vec<u8>) -> Result<Self, Error> {
if value.len() != 32 {
Err(Error::InvalidDigestLen(value.len()))
} else {
Ok(Self(value))
}
}
// returns a copy of the inner [Vec<u8>].
pub fn to_vec(&self) -> Vec<u8> {
self.0.to_vec()
}
}
impl From<&[u8; 32]> for B3Digest {
fn from(value: &[u8; 32]) -> Self {
Self(value.to_vec())
}
}
impl Clone for B3Digest {
fn clone(&self) -> Self {
Self(self.0.to_owned())
}
}
impl std::fmt::Display for B3Digest {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "b3:{}", BASE64.encode(self.0.as_slice()))
}
}
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