// Factory sets the fee for a specific pool (governance only)
function setFee(address _pool, uint24 _fee) external;

// Pool stores and exposes its fee
function fee() external view returns (uint24);

totalFee = baseFee + variableFee

baseFee = baseFactor × binStep × 1e10

baseFeeBps = baseFactor × binStep / 10,000

// Collect accumulated fees for a position (via pool directly)
function collect(
    address recipient,
    uint256 index,
    int24 tickLower,
    int24 tickUpper,
    uint128 amount0Requested,
    uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);

Swap → Pool Collects Fee (per pool.fee())
   ↓
Split Based on feeProtocol Setting
   ↓
Gauged policy (feeProtocol = 1,000,000; treasuryFees = 0):
   └─→ 100% → FeeCollector → FeeDistributor → xRAM Voters claim

Fee-only policy (feeProtocol = 50,000):
   ├─→ 95% → LPs (collected via pool.collect())
   └─→ 5%  → FeeCollector → Treasury (no FeeDistributor exists)

protocol amount = total swap fee × protocolShare / 10,000

interface IFeeCollector {
    // Collect protocol fees from a pool and distribute to FeeDistributor + Treasury
    function collectProtocolFees(address pool) external;

    // Treasury configuration (governance)
    function setTreasury(address newTreasury) external;
    function setTreasuryFees(uint256 _treasuryFees) external;

    // Read state
    function treasury() external returns (address);
    function treasuryFees() external returns (uint256);
}

// Concentrated liquidity
uint24 currentFee = pool.fee();

// DLMM: returns amountInLeft, amountOut, and the current fee amount
(uint128 amountInLeft, uint128 amountOut, uint128 feeAmount) =
    dlmmPool.getSwapOut(amountIn, swapForY);

// Use the applicable CL or DLMM quoter for the complete route.
uint256 quotedOut = quote.amountOut;
require(quotedOut > 0, "no complete quote");

uint256 minOut = quotedOut * 99 / 100; // example 1% slippage tolerance

// Emitted by factory when a pool's fee is changed
event FeeAdjustment(address pool, uint24 newFee);

// Emitted by factory when default protocol fee changes
event SetFeeProtocol(uint24 feeProtocolOld, uint24 feeProtocolNew);

// Emitted by factory when pool-specific protocol fee changes
event SetPoolFeeProtocol(address pool, uint24 feeProtocolOld, uint24 feeProtocolNew);

// DLMM pool fee and volatility configuration
event StaticFeeParametersSet(...);

// DLMM fee accounting
event CompositionFees(...);
event CollectedProtocolFees(...);