Token name: Work

Token symbol: WORK

Write these 4 files EXACTLY as given (already tested; formatting only, never change logic). foundry.toml: solc 0.8.26, evm_version cancun, optimizer true, optimizer_runs 200, via_ir true, bytecode_hash "none"; vendor Uniswap v4-core v4.0.0 at lib/v4-core and OpenZeppelin v5 at lib/openzeppelin-contracts, remappings v4-core/=lib/v4-core/ and @openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/. Hook is deployed at a CREATE2 address with flags 0x20C4; the third constructor arg is the already-deployed WORKERS NFT (exposes tradingOpenAt()). Fees: every hook fee (snipe 50% sliding to 2% over 15 min after the WORKERS NFT's tradingOpenAt, then 2%) goes to the treasury 0xc9eafe33a510a3a3d95a94c4f85adaf6a3ea12a0 via a permissionless sweep. Admin: that same address may only set the standing fee within 0-10%; no other admin, no upgrades. Tests against the real PoolManager.

launch.json:

{"kind":"univ4_hook","hook":{"contract":"WorkGateHook","constructorArgs":["$poolManager","$token","0x363860179149628b6fd73b7e05a6cd102de3a72a"],"permissions":["beforeInitialize","beforeSwap","afterSwap","afterSwapReturnDelta"]},"token":{"contract":"Work","name":"Work","symbol":"WORK","decimals":18},"pool":{"pairedCurrency":"0x5f7bb59365ce557c26dbcaa4ee9d39a4b95b7127","fee":12500,"tickSpacing":60,"initialPrice":"79228162514264337593543950336"}}

src/Work.sol:

pragma solidity 0.8.26;import{ERC20}from "@openzeppelin/contracts/token/ERC20/ERC20.sol";contract Work is ERC20{constructor()ERC20("Work","WORK"){_mint(msg.sender,1_000_000_000 ether);}}

src/WorkGateHook.sol:

// SPDX-License-Identifier: MIT

pragma solidity 0.8.26;import{IPoolManager}from "v4-core/src/interfaces/IPoolManager.sol";import{IHooks}from "v4-core/src/interfaces/IHooks.sol";import{Hooks}from "v4-core/src/libraries/Hooks.sol";import{PoolKey}from "v4-core/src/types/PoolKey.sol";import{Currency}from "v4-core/src/types/Currency.sol";import{BalanceDelta}from "v4-core/src/types/BalanceDelta.sol";import{BeforeSwapDelta}from "v4-core/src/types/BeforeSwapDelta.sol";contract WorkGateHook{address public constant IMD=0x5F7Bb59365ce557C26dbcAa4EE9d39A4b95B7127;address public constant B=0xc9EAFE33A510a3a3d95A94c4f85AdaF6a3EA12a0;IPoolManager public immutable poolManager;address public immutable token;address public immutable workers;uint256 public openedAt;uint256 public standingFee=200;bool public initialized;error TradingClosed();event StandingFee(uint256 fee);constructor(IPoolManager m,address t,address w){require(t!=IMD&&w.code.length>0);poolManager=m;token=t;workers=w;Hooks.validateHookPermissions(IHooks(address(this)),Hooks.Permissions(true,false,false,false,false,false,true,true,false,false,false,true,false,false));}modifier onlyPM(){require(msg.sender==address(poolManager));_;}function beforeInitialize(address,PoolKey calldata k,uint160)external onlyPM returns(bytes4){address a=Currency.unwrap(k.currency0);address b=Currency.unwrap(k.currency1);require(!initialized&&((a==IMD&&b==token)||(a==token&&b==IMD))&&k.fee==12500&&k.tickSpacing==60&&address(k.hooks)==address(this));initialized=true;return IHooks.beforeInitialize.selector;}function tradingOpenAt()public view returns(uint256 t){t=openedAt;if(t==0){(bool ok,bytes memory r)=workers.staticcall{gas:50000}(abi.encodeWithSignature("tradingOpenAt()"));if(ok&&r.length>31)t=abi.decode(r,(uint256));if(t>block.timestamp)t=0;}}function tradingOpen()external view returns(bool){return tradingOpenAt()!=0;}function feeNow()public view returns(uint256){uint256 t=tradingOpenAt();uint256 s=standingFee;if(t==0||block.timestamp<=t)return 5000;t=block.timestamp-t;return t<900?s+(5000-s)*(900-t)/900:s;}function setStandingFee(uint256 f)external{require(msg.sender==B&&f<=1000);standingFee=f;emit StandingFee(f);}function beforeSwap(address,PoolKey calldata,IPoolManager.SwapParams calldata,bytes calldata)external onlyPM returns(bytes4,BeforeSwapDelta,uint24){if(openedAt==0){uint256 t=tradingOpenAt();if(t==0)revert TradingClosed();openedAt=t;}return(IHooks.beforeSwap.selector,BeforeSwapDelta.wrap(0),0);}function afterSwap(address,PoolKey calldata k,IPoolManager.SwapParams calldata p,BalanceDelta d,bytes calldata)external onlyPM returns(bytes4,int128){bool u1=(p.amountSpecified<0)==p.zeroForOne;int128 a=u1?d.amount1():d.amount0();uint256 f=uint256(int256(a<0?-a:a))*feeNow()/10000;if(f>0)poolManager.mint(address(this),(u1?k.currency1:k.currency0).toId(),f);return(IHooks.afterSwap.selector,int128(int256(f)));}function sweep()external{poolManager.unlock("");address[3]memory c=[IMD,token,address(0)];for(uint256 i;i<3;++i){Currency x=Currency.wrap(c[i]);uint256 v=x.balanceOfSelf();if(v>0)x.transfer(B,v);}}function unlockCallback(bytes calldata)external onlyPM returns(bytes memory){for(uint256 i;i<2;++i){Currency x=Currency.wrap(i==0?IMD:token);uint256 v=poolManager.balanceOf(address(this),x.toId());if(v>0){poolManager.burn(address(this),x.toId(),v);poolManager.take(x,B,v);}}return "";}}