add pool getters (Uniswap#438)

* add getters

* update snaps

* clean test

.forge-snapshots/before swap hook, already cached dynamic fee.snap

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.forge-snapshots/cached dynamic fee, no hooks.snap

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.forge-snapshots/donate gas with 1 token.snap

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.forge-snapshots/donate gas with 2 tokens.snap

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.forge-snapshots/erc20 collect protocol fees.snap

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.forge-snapshots/gas overhead of no-op lock.snap

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.forge-snapshots/initialize.snap

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.forge-snapshots/mint with empty hook.snap

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.forge-snapshots/mint with native token.snap

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.forge-snapshots/mint.snap

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.forge-snapshots/mintWithEmptyHookEOAInitiated.snap

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.forge-snapshots/modify position with noop.snap

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.forge-snapshots/native collect protocol fees.snap

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.forge-snapshots/poolManager bytecode size.snap

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.forge-snapshots/simple swap with native.snap

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.forge-snapshots/simple swap.snap

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.forge-snapshots/simpleSwapEOAInitiated.snap

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.forge-snapshots/simpleSwapNativeEOAInitiated.snap

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.forge-snapshots/swap against liquidity with native token.snap

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.forge-snapshots/swap against liquidity.snap

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.forge-snapshots/swap burn claim for input.snap

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.forge-snapshots/swap mint output as claim.snap

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.forge-snapshots/swap with dynamic fee.snap

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.forge-snapshots/swap with hooks.snap

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.forge-snapshots/swap with noop.snap

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.forge-snapshots/update dynamic fee in before swap.snap

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src/PoolManager.sol

@@ -21,6 +21,7 @@ import {Claims} from "./Claims.sol";
 import {PoolId, PoolIdLibrary} from "./types/PoolId.sol";
 import {BalanceDelta, BalanceDeltaLibrary} from "./types/BalanceDelta.sol";
 import {Lockers} from "./libraries/Lockers.sol";
+import {PoolGetters} from "./libraries/PoolGetters.sol";
 
 /// @notice Holds the state for all pools
 contract PoolManager is IPoolManager, Fees, NoDelegateCall, Claims {
@@ -31,6 +32,7 @@ contract PoolManager is IPoolManager, Fees, NoDelegateCall, Claims {
     using Position for mapping(bytes32 => Position.Info);
     using CurrencyLibrary for Currency;
     using FeeLibrary for uint24;
+    using PoolGetters for Pool.State;
 
     /// @inheritdoc IPoolManager
     int24 public constant MAX_TICK_SPACING = TickMath.MAX_TICK_SPACING;
@@ -446,6 +448,14 @@ contract PoolManager is IPoolManager, Fees, NoDelegateCall, Claims {
         return Lockers.getCurrentHook();
     }
 
+    function getPoolTickInfo(PoolId id, int24 tick) external view returns (Pool.TickInfo memory) {
+        return pools[id].getPoolTickInfo(tick);
+    }
+
+    function getPoolBitmapInfo(PoolId id, int16 word) external view returns (uint256 tickBitmap) {
+        return pools[id].getPoolBitmapInfo(word);
+    }
+
     /// @notice receive native tokens for native pools
     receive() external payable {}
 }

src/libraries/PoolGetters.sol

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity ^0.8.20;
+
+import {Pool} from "./Pool.sol";
+
+library PoolGetters {
+    function getPoolTickInfo(Pool.State storage pool, int24 tick) external view returns (Pool.TickInfo memory) {
+        return pool.ticks[tick];
+    }
+
+    function getPoolBitmapInfo(Pool.State storage pool, int16 word) external view returns (uint256 tickBitmap) {
+        return pool.tickBitmap[word];
+    }
+}

test/Tick.t.sol

@@ -6,8 +6,10 @@ import {GasSnapshot} from "../lib/forge-gas-snapshot/src/GasSnapshot.sol";
 import {Constants} from "./utils/Constants.sol";
 import {Pool} from "../src/libraries/Pool.sol";
 import {TickMath} from "../src/libraries/TickMath.sol";
+import {PoolGetters} from "../src/libraries/PoolGetters.sol";
 
 contract TickTest is Test, GasSnapshot {
+    using PoolGetters for Pool.State;
     using Pool for Pool.State;
 
     int24 constant LOW_TICK_SPACING = 10;
@@ -28,6 +30,10 @@ contract TickTest is Test, GasSnapshot {
         pool.ticks[tick] = info;
     }
 
+    function setTickBitmap(int16 word, uint256 bitmap) internal {
+        pool.tickBitmap[word] = bitmap;
+    }
+
     function getFeeGrowthInside(
         int24 tickLower,
         int24 tickUpper,
@@ -459,6 +465,20 @@ contract TickTest is Test, GasSnapshot {
         assertEq(info.feeGrowthOutside1X128, 2);
     }
 
+    function test_getPoolTickInfo(int24 tick, Pool.TickInfo memory info) public {
+        setTick(tick, info);
+        Pool.TickInfo memory actualInfo = pool.getPoolTickInfo(tick);
+        assertEq(actualInfo.liquidityGross, info.liquidityGross);
+        assertEq(actualInfo.liquidityNet, info.liquidityNet);
+        assertEq(actualInfo.feeGrowthOutside0X128, info.feeGrowthOutside0X128);
+        assertEq(actualInfo.feeGrowthOutside1X128, info.feeGrowthOutside1X128);
+    }
+
+    function test_getPoolBitmapInfo(int16 word, uint256 bitmap) public {
+        setTickBitmap(word, bitmap);
+        assertEq(pool.getPoolBitmapInfo(word), bitmap);
+    }
+
     function testTick_tickSpacingToParametersInvariants_fuzz(int24 tickSpacing) public {
         vm.assume(tickSpacing <= TickMath.MAX_TICK_SPACING);
         vm.assume(tickSpacing >= TickMath.MIN_TICK_SPACING);