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use super::{VestSpec, REWARD_VESTING_SPEC};
use crate::{
math::PRECISION,
network::EPOCHS_IN_DAY,
smooth::{self, FilterEstimate},
TokenAmount, EXPECTED_LEADERS_PER_EPOCH,
};
use clock::ChainEpoch;
use fil_types::{StoragePower, FILECOIN_PRECISION};
use num_bigint::{num_integer::div_floor, BigInt, Integer};
use num_traits::Zero;
use std::cmp::{self, max};
const PRE_COMMIT_DEPOSIT_FACTOR: u64 = 20;
const INITIAL_PLEDGE_FACTOR: u64 = 20;
pub const PRE_COMMIT_DEPOSIT_PROJECTION_PERIOD: i64 =
(PRE_COMMIT_DEPOSIT_FACTOR as ChainEpoch) * EPOCHS_IN_DAY;
pub const INITIAL_PLEDGE_PROJECTION_PERIOD: i64 =
(INITIAL_PLEDGE_FACTOR as ChainEpoch) * EPOCHS_IN_DAY;
lazy_static! {
static ref LOCK_TARGET_FACTOR_NUM: BigInt = BigInt::from(3);
static ref LOCK_TARGET_FACTOR_DENOM: BigInt = BigInt::from(10);
static ref TERMINATION_REWARD_FACTOR_NUM: BigInt = BigInt::from(1);
static ref TERMINATION_REWARD_FACTOR_DENOM: BigInt = BigInt::from(2);
static ref LOCKED_REWARD_FACTOR_NUM: BigInt = BigInt::from(3);
static ref LOCKED_REWARD_FACTOR_DENOM: BigInt = BigInt::from(4);
static ref INITIAL_PLEDGE_MAX_PER_BYTE: BigInt =
BigInt::from(10_u64.pow(18) / (32 << 30));
pub static ref BASE_REWARD_FOR_DISPUTED_WINDOW_POST: BigInt =
BigInt::from(4 * FILECOIN_PRECISION);
pub static ref BASE_PENALTY_FOR_DISPUTED_WINDOW_POST: BigInt =
BigInt::from(FILECOIN_PRECISION) * 20;
}
const INVALID_WINDOW_POST_PROJECTION_PERIOD: ChainEpoch =
CONTINUED_FAULT_PROJECTION_PERIOD + 2 * EPOCHS_IN_DAY;
const CONTINUED_FAULT_FACTOR_NUM: i64 = 351;
const CONTINUED_FAULT_FACTOR_DENOM: i64 = 100;
pub const CONTINUED_FAULT_PROJECTION_PERIOD: ChainEpoch =
(EPOCHS_IN_DAY * CONTINUED_FAULT_FACTOR_NUM) / CONTINUED_FAULT_FACTOR_DENOM;
const TERMINATION_PENALTY_LOWER_BOUND_PROJECTIONS_PERIOD: ChainEpoch = (EPOCHS_IN_DAY * 35) / 10;
pub const TERMINATION_LIFETIME_CAP: ChainEpoch = 140;
const CONSENSUS_FAULT_FACTOR: u64 = 5;
pub fn expected_reward_for_power(
reward_estimate: &FilterEstimate,
network_qa_power_estimate: &FilterEstimate,
qa_sector_power: &StoragePower,
projection_duration: ChainEpoch,
) -> TokenAmount {
let network_qa_power_smoothed = network_qa_power_estimate.estimate();
if network_qa_power_smoothed.is_zero() {
return reward_estimate.estimate();
}
let expected_reward_for_proving_period = smooth::extrapolated_cum_sum_of_ratio(
projection_duration,
0,
reward_estimate,
network_qa_power_estimate,
);
let br128 = qa_sector_power * expected_reward_for_proving_period;
std::cmp::max(br128 >> PRECISION, Default::default())
}
fn expected_reward_for_power_clamped_at_atto_fil(
reward_estimate: &FilterEstimate,
network_qa_power_estimate: &FilterEstimate,
qa_sector_power: &StoragePower,
projection_duration: ChainEpoch,
) -> TokenAmount {
let br = expected_reward_for_power(
reward_estimate,
network_qa_power_estimate,
qa_sector_power,
projection_duration,
);
if br.le(&TokenAmount::from(0)) {
1.into()
} else {
br
}
}
pub fn pledge_penalty_for_continued_fault(
reward_estimate: &FilterEstimate,
network_qa_power_estimate: &FilterEstimate,
qa_sector_power: &StoragePower,
) -> TokenAmount {
expected_reward_for_power(
reward_estimate,
network_qa_power_estimate,
qa_sector_power,
CONTINUED_FAULT_PROJECTION_PERIOD,
)
}
pub fn pledge_penalty_for_termination_lower_bound(
reward_estimate: &FilterEstimate,
network_qa_power_estimate: &FilterEstimate,
qa_sector_power: &StoragePower,
) -> TokenAmount {
expected_reward_for_power(
reward_estimate,
network_qa_power_estimate,
qa_sector_power,
TERMINATION_PENALTY_LOWER_BOUND_PROJECTIONS_PERIOD,
)
}
#[allow(clippy::too_many_arguments)]
pub fn pledge_penalty_for_termination(
day_reward: &TokenAmount,
sector_age: ChainEpoch,
twenty_day_reward_at_activation: &TokenAmount,
network_qa_power_estimate: &FilterEstimate,
qa_sector_power: &StoragePower,
reward_estimate: &FilterEstimate,
replaced_day_reward: &TokenAmount,
replaced_sector_age: ChainEpoch,
) -> TokenAmount {
let lifetime_cap = TERMINATION_LIFETIME_CAP * EPOCHS_IN_DAY;
let capped_sector_age = std::cmp::min(sector_age, lifetime_cap);
let mut expected_reward: TokenAmount = day_reward * capped_sector_age;
let relevant_replaced_age =
std::cmp::min(replaced_sector_age, lifetime_cap - capped_sector_age);
expected_reward += replaced_day_reward * relevant_replaced_age;
let penalized_reward = expected_reward * &*TERMINATION_REWARD_FACTOR_NUM;
let penalized_reward = penalized_reward / &*TERMINATION_REWARD_FACTOR_DENOM;
cmp::max(
pledge_penalty_for_termination_lower_bound(
reward_estimate,
network_qa_power_estimate,
qa_sector_power,
),
twenty_day_reward_at_activation + (penalized_reward / EPOCHS_IN_DAY),
)
}
pub fn pledge_penalty_for_invalid_windowpost(
reward_estimate: &FilterEstimate,
network_qa_power_estimate: &FilterEstimate,
qa_sector_power: &StoragePower,
) -> TokenAmount {
expected_reward_for_power(
reward_estimate,
network_qa_power_estimate,
qa_sector_power,
INVALID_WINDOW_POST_PROJECTION_PERIOD,
) + &*BASE_PENALTY_FOR_DISPUTED_WINDOW_POST
}
pub fn pre_commit_deposit_for_power(
reward_estimate: &FilterEstimate,
network_qa_power_estimate: &FilterEstimate,
qa_sector_power: &StoragePower,
) -> TokenAmount {
expected_reward_for_power_clamped_at_atto_fil(
reward_estimate,
network_qa_power_estimate,
qa_sector_power,
PRE_COMMIT_DEPOSIT_PROJECTION_PERIOD,
)
}
pub fn initial_pledge_for_power(
qa_power: &StoragePower,
baseline_power: &StoragePower,
reward_estimate: &FilterEstimate,
network_qa_power_estimate: &FilterEstimate,
circulating_supply: &TokenAmount,
) -> TokenAmount {
let ip_base = expected_reward_for_power_clamped_at_atto_fil(
reward_estimate,
network_qa_power_estimate,
qa_power,
INITIAL_PLEDGE_PROJECTION_PERIOD,
);
let lock_target_num = &*LOCK_TARGET_FACTOR_NUM * circulating_supply;
let lock_target_denom = &*LOCK_TARGET_FACTOR_DENOM;
let pledge_share_num = qa_power;
let network_qa_power = network_qa_power_estimate.estimate();
let pledge_share_denom = cmp::max(cmp::max(&network_qa_power, baseline_power), qa_power);
let additional_ip_num: TokenAmount = lock_target_num * pledge_share_num;
let additional_ip_denom = lock_target_denom * pledge_share_denom;
let additional_ip = additional_ip_num.div_floor(&additional_ip_denom);
let nominal_pledge = ip_base + additional_ip;
let pledge_cap = &*INITIAL_PLEDGE_MAX_PER_BYTE * qa_power;
cmp::min(nominal_pledge, pledge_cap)
}
pub fn consensus_fault_penalty(this_epoch_reward: TokenAmount) -> TokenAmount {
(this_epoch_reward * CONSENSUS_FAULT_FACTOR)
.div_floor(&TokenAmount::from(EXPECTED_LEADERS_PER_EPOCH))
}
pub fn locked_reward_from_reward(reward: TokenAmount) -> (TokenAmount, &'static VestSpec) {
let lock_amount = (reward * &*LOCKED_REWARD_FACTOR_NUM).div_floor(&*LOCKED_REWARD_FACTOR_DENOM);
(lock_amount, &REWARD_VESTING_SPEC)
}
lazy_static! {
static ref ESTIMATED_SINGLE_PROVE_COMMIT_GAS_USAGE: BigInt = BigInt::from(49299973);
static ref ESTIMATED_SINGLE_PRE_COMMIT_GAS_USAGE: BigInt = BigInt::from(16433324);
static ref BATCH_DISCOUNT_NUM: BigInt = BigInt::from(1);
static ref BATCH_DISCOUNT_DENOM: BigInt = BigInt::from(20);
static ref BATCH_BALANCER: BigInt = BigInt::from(1_000_000_000) * BigInt::from(5);
}
pub fn aggregate_prove_commit_network_fee(
aggregate_size: i64,
base_fee: &TokenAmount,
) -> TokenAmount {
aggregate_network_fee(
aggregate_size,
&ESTIMATED_SINGLE_PROVE_COMMIT_GAS_USAGE,
base_fee,
)
}
pub fn aggregate_pre_commit_network_fee(
aggregate_size: i64,
base_fee: &TokenAmount,
) -> TokenAmount {
aggregate_network_fee(
aggregate_size,
&ESTIMATED_SINGLE_PRE_COMMIT_GAS_USAGE,
base_fee,
)
}
pub fn aggregate_network_fee(
aggregate_size: i64,
gas_usage: &BigInt,
base_fee: &TokenAmount,
) -> TokenAmount {
let effective_gas_fee = max(base_fee, &*BATCH_BALANCER);
let network_fee_num = effective_gas_fee * gas_usage * aggregate_size * &*BATCH_DISCOUNT_NUM;
div_floor(network_fee_num, BATCH_DISCOUNT_DENOM.clone())
}