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use serde::{Deserialize, Serialize};
use std::fmt;
use tiny_keccak::{Hasher, Sha3};
use xor_name::XorName;
#[derive(Ord, PartialOrd, Debug, Clone, Copy, Eq, PartialEq, Serialize, Deserialize, Hash)]
pub struct MessageId(pub XorName);
impl MessageId {
pub fn new() -> Self {
Self(XorName::random())
}
pub fn in_response_to(src: &MessageId) -> MessageId {
let mut hash_bytes = Vec::new();
let src = src.0;
hash_bytes.extend_from_slice(&src.0);
let mut hasher = Sha3::v256();
let mut output = [0; 32];
hasher.update(&hash_bytes);
hasher.finalize(&mut output);
MessageId(XorName(output))
}
pub fn combine(srcs: Vec<XorName>) -> MessageId {
let mut hash_bytes = Vec::new();
for src in srcs.into_iter() {
hash_bytes.extend_from_slice(&src.0);
}
let mut hasher = Sha3::v256();
let mut output = [0; 32];
hasher.update(&hash_bytes);
hasher.finalize(&mut output);
MessageId(XorName(output))
}
}
impl Default for MessageId {
fn default() -> Self {
Self::new()
}
}
impl fmt::Display for MessageId {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.0)
}
}