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// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;

import {IERC20} from "./interfaces/IERC20.sol";

contract PopJrVesting {
    // July 4th, 2043
    uint64 public constant INITIAL_UNLOCK = 2319598800;
    // 60 years + 14 leap days (2100 is not a leap year)
    uint64 public constant VESTING_PERIOD = 60 * 365 days + 14 days;
    uint16 public constant INITIAL_UNLOCK_BPS = 500;
    uint16 private constant BPS = 10_000;
    // pop-punk.eth to transfer to Pop Jr
    address public constant INITIAL_OWNER = 0x3d4aaFbe86059d17C6263332c560f18C4F1Fec34;
    IERC20 public constant POP_JR = IERC20(0x0b0C9F8D13e17F4E8c07255605E75Eb0b4800097);

    address public owner = INITIAL_OWNER;
    address public pendingOwner;
    uint8 public transfersRemaining = 3;
    uint64 public lastClaim = INITIAL_UNLOCK;
    uint256 private initialUnlockBalance;

    error NotAuthorized();

    function transferOwnership(address newOwner) external {
        if (msg.sender != owner) revert NotAuthorized();
        if (transfersRemaining == 0) revert NotAuthorized();
        pendingOwner = newOwner;
    }

    function cancelOwnershipTransfer() external {
        if (msg.sender != owner) revert NotAuthorized();
        pendingOwner = address(0);
    }

    function acceptOwnership() external {
        if (msg.sender != pendingOwner) revert NotAuthorized();
        owner = msg.sender;
        pendingOwner = address(0);
        unchecked {
            --transfersRemaining;
        }
    }

    function claim() external {
        if (msg.sender != owner) revert NotAuthorized();
        if (block.timestamp < INITIAL_UNLOCK) revert NotAuthorized();

        (uint256 startBalance, uint256 unlockAmount) = calculateUnlockAmount(block.timestamp);
        if (unlockAmount == 0) revert NotAuthorized();
        
        if (lastClaim == INITIAL_UNLOCK) {
            initialUnlockBalance = startBalance;
        }
        lastClaim = uint64(block.timestamp);
        POP_JR.transfer(owner, unlockAmount);
    }

    function calculateUnlockAmount(uint256 timestamp) public view returns (uint256 startBalance, uint256 unlockedAmount) {
        startBalance = initialUnlockBalance;
        uint256 remainingBalance = POP_JR.balanceOf(address(this));
        if (startBalance == 0) {
            if (timestamp > INITIAL_UNLOCK) {
                unlockedAmount = remainingBalance * INITIAL_UNLOCK_BPS / BPS;
                remainingBalance = remainingBalance - unlockedAmount;
            }
            startBalance = remainingBalance;
        }
        uint256 _lastClaim = lastClaim;
        if (timestamp > _lastClaim) {
            uint256 elapsedTime = timestamp - INITIAL_UNLOCK;
            if (elapsedTime > VESTING_PERIOD) {
                unlockedAmount += remainingBalance;
            } else {
                uint256 remainingTime = VESTING_PERIOD - elapsedTime;
                uint256 balanceToRemain = startBalance * remainingTime / VESTING_PERIOD;
                unlockedAmount += (remainingBalance - balanceToRemain);
            }
        }
    }
}

//SPDX-License-Identifier: MIT
pragma solidity 0.8.24;

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 value) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 value) external returns (bool);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

{
  "viaIR": false,
  "codegen": "yul",
  "remappings": [
    "forge-std/=lib/forge-std/src/"
  ],
  "evmVersion": "cancun",
  "outputSelection": {
    "*": {
      "*": [
        "abi",
        "metadata"
      ],
      "": [
        "ast"
      ]
    }
  },
  "optimizer": {
    "enabled": true,
    "mode": "3",
    "fallback_to_optimizing_for_size": false,
    "disable_system_request_memoization": true
  },
  "metadata": {},
  "libraries": {},
  "enableEraVMExtensions": false,
  "forceEVMLA": false
}

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[{"inputs":[],"name":"NotAuthorized","type":"error"},{"inputs":[],"name":"INITIAL_OWNER","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"INITIAL_UNLOCK","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"INITIAL_UNLOCK_BPS","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"POP_JR","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"VESTING_PERIOD","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"calculateUnlockAmount","outputs":[{"internalType":"uint256","name":"startBalance","type":"uint256"},{"internalType":"uint256","name":"unlockedAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"cancelOwnershipTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"lastClaim","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"transfersRemaining","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"}]

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