waterpump-evm-pool-sdk 0.1.0

EVM pool SDK — viewers, infusers, harvesters, swappers for Uniswap V3/V4, PancakeSwap, Slipstream, Shadow, Algebra
Documentation 
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use anyhow::{Context, Result};
use tracing::instrument;
use uniswap_sdk_core::prelude::{Currency, CurrencyAmount, Percent, TradeType};

#[inline]
#[instrument(skip(amount_in), fields(trade_type = ?trade_type, slippage_tolerance = ?slippage_tolerance, amount_in = ?amount_in))]
pub fn maximum_amount_in(
    trade_type: TradeType,
    slippage_tolerance: Percent,
    amount_in: CurrencyAmount<Currency>,
) -> Result<CurrencyAmount<Currency>> {
    assert!(slippage_tolerance >= Percent::default(), "SLIPPAGE_TOLERANCE");
    if trade_type == TradeType::ExactInput {
        return Ok(amount_in);
    }
    amount_in
        .multiply(&(Percent::new(1, 1) + slippage_tolerance))
        .context("Failed to calculate maximum amount in")
}

#[inline]
#[instrument(skip(amount_out), fields(trade_type = ?trade_type, slippage_tolerance = ?slippage_tolerance, amount_out = ?amount_out))]
pub fn minimum_amount_out(
    trade_type: TradeType,
    slippage_tolerance: Percent,
    amount_out: CurrencyAmount<Currency>,
) -> Result<CurrencyAmount<Currency>> {
    assert!(slippage_tolerance >= Percent::default(), "SLIPPAGE_TOLERANCE");
    if trade_type == TradeType::ExactOutput {
        return Ok(amount_out);
    }
    // Calculate minimum amount out: amount_out / (1 + slippage_tolerance)
    // This is equivalent to: amount_out * (1 / (1 + slippage_tolerance))
    let denominator = Percent::new(1, 1) + slippage_tolerance;
    amount_out.divide(&denominator).context("Failed to calculate minimum amount out")
}