38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
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// Copyright (C) 2024 Riften Labs AS
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//
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// This software is licensed under the GNU Affero General Public License (AGPL), version 3.0 or later.
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// A copy of the license can be found in the LICENSE file or at https://www.gnu.org/licenses/agpl-3.0.html
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use anyhow::Result;
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use rust_decimal::Decimal;
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use super::poolperiod::PoolPeriod;
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pub struct APYAggregator;
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impl APYAggregator {
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pub fn aggregate_apy<I>(pools: I, period_start: Option<u64>) -> Result<Decimal>
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where
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I: Iterator<Item = PoolPeriod>,
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{
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let mut weighted_apy_sum = Decimal::ZERO;
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let mut total_active_time = Decimal::ZERO;
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for pool in pools {
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let days_active = pool.duration_days(&period_start)?;
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if !days_active.is_zero() {
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let (_pool_yield, apy) = pool.yield_and_apy(&period_start)?;
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weighted_apy_sum += apy * days_active;
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total_active_time += days_active;
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}
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}
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if total_active_time.is_zero() {
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Ok(Decimal::ZERO)
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} else {
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Ok(weighted_apy_sum / total_active_time)
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}
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}
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}
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