use crate::{Error, Message, MessageId, PublicKey, Result, Signature};
use multibase::{self, Base};
use serde::{de::DeserializeOwned, Serialize};
use unwrap::unwrap;
pub fn verify_signature(
signature: &Signature,
public_key: &PublicKey,
request: &Message,
message_id: &MessageId,
) -> Result<()> {
let message = serialise(&(request, *message_id));
public_key.verify(signature, message)
}
pub(crate) fn serialise<T: Serialize>(data: &T) -> Vec<u8> {
unwrap!(bincode::serialize(data))
}
pub(crate) fn encode<T: Serialize>(data: &T) -> String {
let serialised = serialise(&data);
multibase::encode(Base::Base32Z, &serialised)
}
pub(crate) fn decode<I: AsRef<str>, O: DeserializeOwned>(encoded: I) -> Result<O> {
let (base, decoded) =
multibase::decode(encoded).map_err(|e| Error::FailedToParse(e.to_string()))?;
if base != Base::Base32Z {
return Err(Error::FailedToParse(format!(
"Expected z-base-32 encoding, but got {:?}",
base
)));
}
Ok(bincode::deserialize(&decoded).map_err(|e| Error::FailedToParse(e.to_string()))?)
}