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use alloc::{collections::BTreeMap, vec::Vec};
use crate::{
bytesrepr::{self, FromBytes, ToBytes},
system::auction::{Bid, DelegationRate},
CLType, CLTyped, PublicKey, U512,
};
#[derive(Default, PartialEq, Clone, Debug)]
pub struct SeigniorageRecipient {
stake: U512,
delegation_rate: DelegationRate,
delegator_stake: BTreeMap<PublicKey, U512>,
}
impl SeigniorageRecipient {
pub fn new(
stake: U512,
delegation_rate: DelegationRate,
delegator_stake: BTreeMap<PublicKey, U512>,
) -> Self {
Self {
stake,
delegation_rate,
delegator_stake,
}
}
pub fn stake(&self) -> &U512 {
&self.stake
}
pub fn delegation_rate(&self) -> &DelegationRate {
&self.delegation_rate
}
pub fn delegator_stake(&self) -> &BTreeMap<PublicKey, U512> {
&self.delegator_stake
}
pub fn total_stake(&self) -> Option<U512> {
self.delegator_total_stake()?.checked_add(self.stake)
}
pub fn delegator_total_stake(&self) -> Option<U512> {
let mut total_stake: U512 = U512::zero();
for stake in self.delegator_stake.values() {
total_stake = total_stake.checked_add(*stake)?;
}
Some(total_stake)
}
}
impl CLTyped for SeigniorageRecipient {
fn cl_type() -> CLType {
CLType::Any
}
}
impl ToBytes for SeigniorageRecipient {
fn to_bytes(&self) -> Result<Vec<u8>, bytesrepr::Error> {
let mut result = bytesrepr::allocate_buffer(self)?;
result.extend(self.stake.to_bytes()?);
result.extend(self.delegation_rate.to_bytes()?);
result.extend(self.delegator_stake.to_bytes()?);
Ok(result)
}
fn serialized_length(&self) -> usize {
self.stake.serialized_length()
+ self.delegation_rate.serialized_length()
+ self.delegator_stake.serialized_length()
}
}
impl FromBytes for SeigniorageRecipient {
fn from_bytes(bytes: &[u8]) -> Result<(Self, &[u8]), bytesrepr::Error> {
let (stake, bytes) = FromBytes::from_bytes(bytes)?;
let (delegation_rate, bytes) = FromBytes::from_bytes(bytes)?;
let (delegator_stake, bytes) = FromBytes::from_bytes(bytes)?;
Ok((
SeigniorageRecipient {
stake,
delegation_rate,
delegator_stake,
},
bytes,
))
}
}
impl From<&Bid> for SeigniorageRecipient {
fn from(bid: &Bid) -> Self {
let delegator_stake = bid
.delegators()
.iter()
.map(|(public_key, delegator)| (public_key.clone(), *delegator.staked_amount()))
.collect();
Self {
stake: *bid.staked_amount(),
delegation_rate: *bid.delegation_rate(),
delegator_stake,
}
}
}
#[cfg(test)]
mod tests {
use alloc::collections::BTreeMap;
use core::iter::FromIterator;
use crate::{
bytesrepr,
system::auction::{DelegationRate, SeigniorageRecipient},
PublicKey, SecretKey, U512,
};
#[test]
fn serialization_roundtrip() {
let delegator_1_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([42; SecretKey::ED25519_LENGTH]).unwrap(),
);
let delegator_2_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([43; SecretKey::ED25519_LENGTH]).unwrap(),
);
let delegator_3_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([44; SecretKey::ED25519_LENGTH]).unwrap(),
);
let seigniorage_recipient = SeigniorageRecipient {
stake: U512::max_value(),
delegation_rate: DelegationRate::max_value(),
delegator_stake: BTreeMap::from_iter(vec![
(delegator_1_key, U512::max_value()),
(delegator_2_key, U512::max_value()),
(delegator_3_key, U512::zero()),
]),
};
bytesrepr::test_serialization_roundtrip(&seigniorage_recipient);
}
#[test]
fn test_overflow_in_delegation_rate() {
let delegator_1_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([42; SecretKey::ED25519_LENGTH]).unwrap(),
);
let delegator_2_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([43; SecretKey::ED25519_LENGTH]).unwrap(),
);
let delegator_3_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([44; SecretKey::ED25519_LENGTH]).unwrap(),
);
let seigniorage_recipient = SeigniorageRecipient {
stake: U512::max_value(),
delegation_rate: DelegationRate::max_value(),
delegator_stake: BTreeMap::from_iter(vec![
(delegator_1_key, U512::max_value()),
(delegator_2_key, U512::max_value()),
(delegator_3_key, U512::zero()),
]),
};
assert_eq!(seigniorage_recipient.total_stake(), None)
}
#[test]
fn test_overflow_in_delegation_total_stake() {
let delegator_1_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([42; SecretKey::ED25519_LENGTH]).unwrap(),
);
let delegator_2_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([43; SecretKey::ED25519_LENGTH]).unwrap(),
);
let delegator_3_key = PublicKey::from(
&SecretKey::ed25519_from_bytes([44; SecretKey::ED25519_LENGTH]).unwrap(),
);
let seigniorage_recipient = SeigniorageRecipient {
stake: U512::max_value(),
delegation_rate: DelegationRate::max_value(),
delegator_stake: BTreeMap::from_iter(vec![
(delegator_1_key, U512::max_value()),
(delegator_2_key, U512::max_value()),
(delegator_3_key, U512::max_value()),
]),
};
assert_eq!(seigniorage_recipient.delegator_total_stake(), None)
}
}
