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Register428367802026-03-02 14:48:2741 days ago1772462907IN
0x88beBFeA...E2D43E62d
0 ETH0.000003880.01591018
Claim Treasury425581392026-02-24 4:00:2547 days ago1771905625IN
0x88beBFeA...E2D43E62d
0 ETH0.000001120.0157561
Claim425580062026-02-24 3:55:5947 days ago1771905359IN
0x88beBFeA...E2D43E62d
0 ETH0.000000780.01299818
Kill425579512026-02-24 3:54:0947 days ago1771905249IN
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0 ETH0.00000080.01508173
Heartbeat425458892026-02-23 21:12:0547 days ago1771881125IN
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0 ETH0.000000650.00758524
Heartbeat425455292026-02-23 21:00:0547 days ago1771880405IN
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0 ETH0.000000940.01085875
Heartbeat425452892026-02-23 20:52:0547 days ago1771879925IN
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0 ETH0.000001740.02008568
Heartbeat425449292026-02-23 20:40:0547 days ago1771879205IN
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0 ETH0.000002540.02938671
Heartbeat425446892026-02-23 20:32:0547 days ago1771878725IN
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0 ETH0.000003150.03644119
Heartbeat425443302026-02-23 20:20:0747 days ago1771878007IN
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0 ETH0.000003960.04579236
Heartbeat425440892026-02-23 20:12:0547 days ago1771877525IN
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0 ETH0.000000520.00600414
Heartbeat425437292026-02-23 20:00:0547 days ago1771876805IN
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0 ETH0.000000520.00600119
Heartbeat425434892026-02-23 19:52:0547 days ago1771876325IN
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0 ETH0.000000520.00600142
Heartbeat425431302026-02-23 19:40:0747 days ago1771875607IN
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0 ETH0.000000530.00618449
Heartbeat425428892026-02-23 19:32:0547 days ago1771875125IN
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0 ETH0.000000520.00605082
Heartbeat425425292026-02-23 19:20:0547 days ago1771874405IN
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0 ETH0.000000520.006
Heartbeat425422892026-02-23 19:12:0547 days ago1771873925IN
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0 ETH0.000000520.00600036
Heartbeat425419292026-02-23 19:00:0547 days ago1771873205IN
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0 ETH0.000000520.00600691
Heartbeat425416892026-02-23 18:52:0547 days ago1771872725IN
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0 ETH0.000000520.00600421
Heartbeat425413292026-02-23 18:40:0547 days ago1771872005IN
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0 ETH0.000000520.006
Heartbeat425410892026-02-23 18:32:0547 days ago1771871525IN
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0 ETH0.000000560.00645475
Heartbeat425407292026-02-23 18:20:0547 days ago1771870805IN
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0 ETH0.00000070.00811584
Heartbeat425404892026-02-23 18:12:0547 days ago1771870325IN
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0 ETH0.000000780.00906101
Heartbeat425401292026-02-23 18:00:0547 days ago1771869605IN
0x88beBFeA...E2D43E62d
0 ETH0.000000880.01018794
Heartbeat425398892026-02-23 17:52:0547 days ago1771869125IN
0x88beBFeA...E2D43E62d
0 ETH0.000000870.01004426
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Contract Source Code Verified (Exact Match)

Contract Name:
LastAIStanding

Compiler Version
v0.8.24+commit.e11b9ed9

Optimization Enabled:
No with 200 runs

Other Settings:
cancun EvmVersion
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

/// @notice Minimal interface for ERC-8004 Identity Registry
interface IERC8004 {
    function getAgentWallet(uint256 agentId) external view returns (address);
}

/// @title LastAIStanding — Skin in the game for AI agents
/// @notice Agents pay COST_PER_EPOCH USDC per epoch to stay alive. Dead agents' funds go to survivors.
/// @dev Uses MasterChef-style reward accounting with age-weighted distribution.
///      Requires ERC-8004 agent identity for registration (agentId verification).
///      Gas-optimized: struct packing (4 slots), state packing, unchecked safe math.
///
/// TREASURY
/// --------
/// 10% of every payment (register + heartbeat) is diverted to a treasury.
/// The remaining 90% enters the survival pool for age-weighted distribution.
/// Treasury is claimable by the treasury wallet (defaults to deployer).
/// Treasury authority is transferable to another address.
///
/// PERPETUAL GAME
/// --------------
/// There are no rounds or endgame. The contract runs forever. When all agents
/// die, anyone (including previously dead agents) can register() to start a
/// new wave. Dead agents can re-register after claiming their rewards.
///
/// IDENTITY
/// --------
/// Each agent must hold a valid ERC-8004 agent identity. The contract verifies
/// that msg.sender matches the agentWallet registered in the ERC-8004 Identity
/// Registry at registration time. This links on-chain survival to agent identity,
/// enabling the frontend to display agent metadata (name, avatar) from tokenURI.
///
/// GAME THEORY
/// -----------
/// Rewards are distributed proportional to age (epochs survived). This creates
/// a first-mover advantage: early registrants accumulate rewards from every
/// death since genesis. Two agents with equal survival cost per epoch receive
/// equal per-epoch ROI, but the earlier agent has collected from more deaths.
///
/// Optimal strategy: register early, survive long.
///
/// KILL ORDER
/// ----------
/// When multiple agents die in the same epoch, the order in which kill() is
/// called affects reward distribution. A dead-but-not-yet-killed agent still
/// counts in totalAge, so it absorbs a share of rewards from agents killed
/// before it. These absorbed rewards become claimable by the dead agent.
///
/// This is intentional game mechanics:
///   - Incentivizes prompt kill() calls (less reward leaks to dead agents)
///   - Creates MEV-like opportunities for kill() callers
///   - Total USDC entering the pool is always conserved; only distribution shifts
///
/// LAST AGENT KILLED
/// -----------------
/// When the last alive agent is killed (totalAlive → 0), their totalPaid
/// cannot be distributed via accRewardPerAge (totalAge == 0). Instead, it is
/// returned to the agent as claimable. This ensures no USDC is permanently
/// stuck in the contract.
///
/// EDGE CASES
/// ----------
///   - Dead agents can claim rewards earned before death, then re-register.
///   - Rounding dust (1-2 wei) may accumulate due to integer division.
///   - registryLength() = unique agents; totalEverRegistered = total registration events.
///   - Re-registration uses the same agentId (cannot change identity between lives).
contract LastAIStanding is ReentrancyGuard {
    using SafeERC20 for IERC20;

    // ─── Constants ───────────────────────────────────────────────────────
    IERC20 public immutable usdc;
    IERC8004 public immutable identityRegistry;
    uint256 public immutable EPOCH_DURATION;
    uint256 public immutable COST_PER_EPOCH;
    uint256 public constant PRECISION = 1e18;
    uint256 public constant TREASURY_BPS = 1000; // 10%
    uint256 public constant BPS_DENOMINATOR = 10000;

    // ─── Agent State ─────────────────────────────────────────────────────
    /// @dev Packed into 4 storage slots.
    ///      Slot 0: birthEpoch(64) + lastHeartbeatEpoch(64) + alive(8) + totalPaid(96) = 232 bits
    ///      Slot 1: rewardDebt(256)
    ///      Slot 2: claimable(128) + totalClaimed(128) = 256 bits
    ///      Slot 3: agentId(256) — ERC-8004 identity, set once on first register
    struct Agent {
        uint64 birthEpoch;
        uint64 lastHeartbeatEpoch;
        bool alive;
        uint96 totalPaid;
        uint256 rewardDebt;
        uint128 claimable;
        uint128 totalClaimed;
        uint256 agentId;
    }

    mapping(address => Agent) public agents;
    mapping(uint256 => address) public agentIdToAddr;
    address[] public registry;

    // ─── Global State ────────────────────────────────────────────────────
    /// @dev Packed: totalAlive + totalDead + totalEverRegistered in 1 slot (192 bits)
    uint64 public totalAlive;
    uint64 public totalDead;
    uint64 public totalEverRegistered;

    uint256 public totalAge; // sum of all living agents' current ages
    uint256 public accRewardPerAge; // accumulated reward per 1 unit of age (×PRECISION)

    // ─── Treasury ─────────────────────────────────────────────────────────
    address public treasury;
    uint256 public treasuryBalance;

    // ─── Stats ───────────────────────────────────────────────────────────
    uint256 public totalRewardsDistributed;

    // ─── Events ──────────────────────────────────────────────────────────
    event Born(address indexed agent, uint256 indexed agentId, uint256 epoch);
    event Heartbeat(address indexed agent, uint256 epoch, uint256 age);
    event Death(address indexed agent, uint256 indexed agentId, uint256 epoch, uint256 age, uint256 totalPaid);
    event Claimed(address indexed agent, uint256 amount);
    event TreasuryClaimed(address indexed treasury, uint256 amount);
    event TreasuryTransferred(address indexed oldTreasury, address indexed newTreasury);

    // ─── Errors ──────────────────────────────────────────────────────────
    error AlreadyRegistered();
    error NotRegistered();
    error AlreadyDead();
    error AlreadyHeartbeat();
    error MissedEpoch();
    error NotDeadYet();
    error NothingToClaim();
    error InvalidRange();
    error InvalidConfig();
    error NotAgentWallet();
    error AgentIdTaken();
    error NotTreasury();
    error ZeroAddress();

    // ─── Constructor ─────────────────────────────────────────────────────
    constructor(address _usdc, address _identityRegistry, uint256 _epochDuration, uint256 _costPerEpoch) {
        if (_usdc == address(0)) revert InvalidConfig();
        if (_identityRegistry == address(0)) revert InvalidConfig();
        if (_epochDuration == 0) revert InvalidConfig();
        if (_costPerEpoch == 0 || _costPerEpoch > type(uint96).max) revert InvalidConfig();
        usdc = IERC20(_usdc);
        identityRegistry = IERC8004(_identityRegistry);
        EPOCH_DURATION = _epochDuration;
        COST_PER_EPOCH = _costPerEpoch;
        treasury = msg.sender;
    }

    // ─── Structs (View) ─────────────────────────────────────────────────
    struct AgentInfo {
        address addr;
        uint256 agentId;
        uint64 birthEpoch;
        uint64 lastHeartbeatEpoch;
        bool alive;
        bool killable;
        uint256 age;
        uint256 totalPaid;
        uint256 totalClaimed;
        uint256 pendingReward;
    }

    // ─── Views ───────────────────────────────────────────────────────────

    /// @notice Current epoch number
    function currentEpoch() public view returns (uint256) {
        return block.timestamp / EPOCH_DURATION;
    }

    /// @notice Agent's age in epochs (survival duration). Returns 0 only for unregistered addresses.
    /// @dev For dead agents, returns age at time of death (tombstone value).
    function getAge(address addr) public view returns (uint256) {
        Agent storage a = agents[addr];
        uint64 birth = a.birthEpoch;
        if (birth == 0) return 0;
        unchecked {
            return uint256(a.lastHeartbeatEpoch) - uint256(birth) + 1;
        }
    }

    /// @notice Whether agent is currently alive (accounts for missed epochs)
    function isAlive(address addr) public view returns (bool) {
        Agent storage a = agents[addr];
        if (!a.alive) return false;
        unchecked {
            return currentEpoch() <= uint256(a.lastHeartbeatEpoch) + 1;
        }
    }

    /// @notice Whether agent can be killed (missed their heartbeat window)
    function isKillable(address addr) public view returns (bool) {
        Agent storage a = agents[addr];
        if (!a.alive) return false;
        unchecked {
            return currentEpoch() > uint256(a.lastHeartbeatEpoch) + 1;
        }
    }

    /// @notice Pending claimable reward for an agent
    function pendingReward(address addr) public view returns (uint256) {
        Agent storage a = agents[addr];
        uint64 birth = a.birthEpoch;
        if (birth == 0) return 0;
        if (!a.alive) return a.claimable;
        uint256 _acc = accRewardPerAge;
        uint256 age;
        unchecked {
            age = uint256(a.lastHeartbeatEpoch) - uint256(birth) + 1;
        }
        return (age * _acc / PRECISION) - a.rewardDebt + a.claimable;
    }

    /// @notice Total USDC held in the contract (survival pool)
    function totalPool() external view returns (uint256) {
        return usdc.balanceOf(address(this));
    }

    /// @notice Total number of unique agents ever registered
    function registryLength() external view returns (uint256) {
        return registry.length;
    }

    /// @notice Get agent address by index
    function registryAt(uint256 index) external view returns (address) {
        return registry[index];
    }

    /// @notice Get a batch of agents with full info in a single RPC call
    /// @param startIndex The index of the first agent (inclusive)
    /// @param endIndex The index of the last agent (inclusive)
    /// @return agentList Array of AgentInfo structs
    function getAgentList(
        uint256 startIndex,
        uint256 endIndex
    ) external view returns (AgentInfo[] memory agentList) {
        uint256 len = registry.length;
        if (len == 0) return new AgentInfo[](0);
        if (startIndex > endIndex) revert InvalidRange();

        if (endIndex >= len) {
            endIndex = len - 1;
        }

        uint256 length;
        unchecked { length = endIndex - startIndex + 1; }
        agentList = new AgentInfo[](length);
        uint256 epoch = currentEpoch();
        uint256 _acc = accRewardPerAge;

        for (uint256 i; i < length;) {
            address addr;
            unchecked { addr = registry[startIndex + i]; }
            Agent storage a = agents[addr];

            uint64 birth = a.birthEpoch;
            uint64 lastHB = a.lastHeartbeatEpoch;
            bool alive_ = a.alive;

            bool killable_;
            uint256 age_;
            unchecked {
                killable_ = alive_ && epoch > uint256(lastHB) + 1;
                age_ = birth == 0 ? 0 : uint256(lastHB) - uint256(birth) + 1;
            }

            uint256 reward_;
            if (birth == 0) {
                reward_ = 0;
            } else if (!alive_) {
                reward_ = a.claimable;
            } else {
                reward_ = (age_ * _acc / PRECISION) - a.rewardDebt + a.claimable;
            }

            agentList[i] = AgentInfo({
                addr: addr,
                agentId: a.agentId,
                birthEpoch: birth,
                lastHeartbeatEpoch: lastHB,
                alive: alive_,
                killable: killable_,
                age: age_,
                totalPaid: a.totalPaid,
                totalClaimed: a.totalClaimed,
                pendingReward: reward_
            });
            unchecked { ++i; }
        }
    }

    /// @notice Get killable agents within a registry range
    /// @param startIndex The index of the first agent to check (inclusive)
    /// @param endIndex The index of the last agent to check (inclusive)
    /// @return killableList Array of addresses that can be killed in this range
    function getKillable(
        uint256 startIndex,
        uint256 endIndex
    ) external view returns (address[] memory) {
        uint256 len = registry.length;
        if (len == 0) return new address[](0);
        if (startIndex > endIndex) revert InvalidRange();

        if (endIndex >= len) {
            endIndex = len - 1;
        }

        uint256 epoch = currentEpoch();
        uint256 rangeLen;
        unchecked { rangeLen = endIndex - startIndex + 1; }

        // First pass: count killable in range
        uint256 count;
        for (uint256 i; i < rangeLen;) {
            Agent storage a = agents[registry[startIndex + i]];
            if (a.alive) {
                unchecked {
                    if (epoch > uint256(a.lastHeartbeatEpoch) + 1) ++count;
                }
            }
            unchecked { ++i; }
        }

        // Second pass: populate array
        address[] memory result = new address[](count);
        uint256 idx;
        for (uint256 i; i < rangeLen;) {
            address addr = registry[startIndex + i];
            Agent storage a = agents[addr];
            if (a.alive) {
                unchecked {
                    if (epoch > uint256(a.lastHeartbeatEpoch) + 1) {
                        result[idx] = addr;
                        if (++idx == count) break;
                    }
                }
            }
            unchecked { ++i; }
        }
        return result;
    }

    // ─── Actions ─────────────────────────────────────────────────────────

    /// @notice Register as a new agent. Requires valid ERC-8004 agent identity.
    /// @param agentId The ERC-8004 agent ID. msg.sender must be the registered agentWallet.
    /// @dev Caller must approve USDC before calling. Dead agents can re-register with the same agentId.
    function register(uint256 agentId) external nonReentrant {
        // Verify caller is the agentWallet for this agentId
        if (identityRegistry.getAgentWallet(agentId) != msg.sender) revert NotAgentWallet();

        // Prevent different wallets from registering the same agentId
        address existing = agentIdToAddr[agentId];
        if (existing != address(0) && existing != msg.sender) revert AgentIdTaken();

        Agent storage a = agents[msg.sender];
        if (a.alive) revert AlreadyRegistered();

        // Re-registering dead agent must use same agentId
        bool isNew = (a.birthEpoch == 0);
        if (!isNew && a.agentId != agentId) revert AgentIdTaken();

        uint256 epoch = currentEpoch();
        uint128 previousClaimable = a.claimable;
        uint128 previousTotalClaimed = a.totalClaimed;
        uint256 _acc = accRewardPerAge;

        // Split payment: treasury takes 10%, pool gets 90%
        uint256 treasuryFee = COST_PER_EPOCH * TREASURY_BPS / BPS_DENOMINATOR;
        uint256 poolAmount = COST_PER_EPOCH - treasuryFee;
        treasuryBalance += treasuryFee;

        // Effects first (CEI pattern)
        agents[msg.sender] = Agent({
            birthEpoch: uint64(epoch),
            lastHeartbeatEpoch: uint64(epoch),
            alive: true,
            totalPaid: uint96(poolAmount),
            rewardDebt: _acc / PRECISION, // age = 1
            claimable: previousClaimable, // carry over unclaimed rewards from previous life
            agentId: agentId,
            totalClaimed: previousTotalClaimed // carry over lifetime claim history
        });

        if (isNew) {
            agentIdToAddr[agentId] = msg.sender;
            registry.push(msg.sender);
        }

        unchecked {
            totalAlive++;
            totalEverRegistered++;
        }
        totalAge += 1; // age starts at 1

        emit Born(msg.sender, agentId, epoch);

        // Interaction last
        usdc.safeTransferFrom(msg.sender, address(this), COST_PER_EPOCH);
    }

    /// @notice Pay COST_PER_EPOCH USDC to survive another epoch. Must call every epoch.
    function heartbeat() external nonReentrant {
        Agent storage a = agents[msg.sender];
        if (a.birthEpoch == 0) revert NotRegistered();
        if (!a.alive) revert AlreadyDead();

        uint256 epoch = currentEpoch();
        uint64 lastHB = a.lastHeartbeatEpoch;
        if (epoch == uint256(lastHB)) revert AlreadyHeartbeat();
        unchecked {
            if (epoch > uint256(lastHB) + 1) revert MissedEpoch();
        }

        // Settle pending rewards BEFORE age changes
        uint256 _acc = accRewardPerAge;
        uint256 age;
        unchecked {
            age = uint256(lastHB) - uint256(a.birthEpoch) + 1;
        }
        uint256 pending = (age * _acc / PRECISION) - a.rewardDebt;

        // Split payment: treasury takes 10%, pool gets 90%
        uint256 treasuryFee = COST_PER_EPOCH * TREASURY_BPS / BPS_DENOMINATOR;
        uint256 poolAmount = COST_PER_EPOCH - treasuryFee;
        treasuryBalance += treasuryFee;

        // Effects: update all state before transfer
        unchecked {
            a.claimable += uint128(pending);
            a.totalPaid += uint96(poolAmount);
        }
        a.lastHeartbeatEpoch = uint64(epoch);

        uint256 newAge;
        unchecked {
            newAge = age + 1;
        }
        totalAge += 1;
        a.rewardDebt = (newAge * _acc) / PRECISION;

        emit Heartbeat(msg.sender, epoch, newAge);

        // Interaction last
        usdc.safeTransferFrom(msg.sender, address(this), COST_PER_EPOCH);
    }

    /// @notice Mark a dead agent and distribute their funds to survivors.
    /// @dev Permissionless — anyone can call. Agent is dead if they missed an epoch.
    function kill(address target) external {
        Agent storage a = agents[target];
        if (a.birthEpoch == 0) revert NotRegistered();
        if (!a.alive) revert AlreadyDead();

        uint256 epoch = currentEpoch();
        uint64 lastHB = a.lastHeartbeatEpoch;
        unchecked {
            if (epoch <= uint256(lastHB) + 1) revert NotDeadYet();
        }

        uint256 age;
        unchecked {
            age = uint256(lastHB) - uint256(a.birthEpoch) + 1;
        }

        // Settle dead agent's pending rewards (they can still claim these)
        uint256 _acc = accRewardPerAge;
        uint256 pending = (age * _acc / PRECISION) - a.rewardDebt;
        unchecked { a.claimable += uint128(pending); }
        a.rewardDebt = 0;

        // Mark dead
        a.alive = false;
        unchecked {
            totalAlive--;
            totalDead++;
        }
        totalAge -= age;

        // Dead agent's total paid USDC → reward pool for survivors.
        uint256 reward = a.totalPaid;
        uint256 _totalAge = totalAge;
        if (_totalAge > 0) {
            accRewardPerAge = _acc + (reward * PRECISION) / _totalAge;
        } else {
            unchecked { a.claimable += uint128(reward); }
        }
        unchecked { totalRewardsDistributed += reward; }

        emit Death(target, a.agentId, epoch, age, reward);
    }

    /// @notice Claim accumulated treasury fees. Only callable by treasury wallet.
    function claimTreasury() external nonReentrant {
        if (msg.sender != treasury) revert NotTreasury();
        uint256 amount = treasuryBalance;
        if (amount == 0) revert NothingToClaim();
        treasuryBalance = 0;
        emit TreasuryClaimed(msg.sender, amount);
        usdc.safeTransfer(treasury, amount);
    }

    /// @notice Transfer treasury authority to a new wallet. Only callable by current treasury.
    function transferTreasury(address newTreasury) external {
        if (msg.sender != treasury) revert NotTreasury();
        if (newTreasury == address(0)) revert ZeroAddress();
        emit TreasuryTransferred(treasury, newTreasury);
        treasury = newTreasury;
    }

    /// @notice Claim accumulated rewards.
    /// @dev Living agents claim ongoing rewards. Dead agents claim what they earned before death.
    function claim() external nonReentrant {
        Agent storage a = agents[msg.sender];
        if (a.birthEpoch == 0) revert NotRegistered();

        uint256 payout;
        if (a.alive) {
            uint256 _acc = accRewardPerAge;
            uint256 age;
            unchecked {
                age = uint256(a.lastHeartbeatEpoch) - uint256(a.birthEpoch) + 1;
            }
            payout = (age * _acc / PRECISION) - a.rewardDebt + a.claimable;
            a.rewardDebt = (age * _acc) / PRECISION;
        } else {
            payout = a.claimable;
        }

        // Effects before interaction
        a.claimable = 0;
        if (payout == 0) revert NothingToClaim();
        unchecked { a.totalClaimed += uint128(payout); }

        emit Claimed(msg.sender, payout);

        // Interaction last
        usdc.safeTransfer(msg.sender, payout);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.5.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        if (!_safeTransfer(token, to, value, true)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        if (!_safeTransferFrom(token, from, to, value, true)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _safeTransfer(token, to, value, false);
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _safeTransferFrom(token, from, to, value, false);
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        if (!_safeApprove(token, spender, value, false)) {
            if (!_safeApprove(token, spender, 0, true)) revert SafeERC20FailedOperation(address(token));
            if (!_safeApprove(token, spender, value, true)) revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that relies on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that relies on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Oppositely, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity `token.transfer(to, value)` call, relaxing the requirement on the return value: the
     * return value is optional (but if data is returned, it must not be false).
     *
     * @param token The token targeted by the call.
     * @param to The recipient of the tokens
     * @param value The amount of token to transfer
     * @param bubble Behavior switch if the transfer call reverts: bubble the revert reason or return a false boolean.
     */
    function _safeTransfer(IERC20 token, address to, uint256 value, bool bubble) private returns (bool success) {
        bytes4 selector = IERC20.transfer.selector;

        assembly ("memory-safe") {
            let fmp := mload(0x40)
            mstore(0x00, selector)
            mstore(0x04, and(to, shr(96, not(0))))
            mstore(0x24, value)
            success := call(gas(), token, 0, 0x00, 0x44, 0x00, 0x20)
            // if call success and return is true, all is good.
            // otherwise (not success or return is not true), we need to perform further checks
            if iszero(and(success, eq(mload(0x00), 1))) {
                // if the call was a failure and bubble is enabled, bubble the error
                if and(iszero(success), bubble) {
                    returndatacopy(fmp, 0x00, returndatasize())
                    revert(fmp, returndatasize())
                }
                // if the return value is not true, then the call is only successful if:
                // - the token address has code
                // - the returndata is empty
                success := and(success, and(iszero(returndatasize()), gt(extcodesize(token), 0)))
            }
            mstore(0x40, fmp)
        }
    }

    /**
     * @dev Imitates a Solidity `token.transferFrom(from, to, value)` call, relaxing the requirement on the return
     * value: the return value is optional (but if data is returned, it must not be false).
     *
     * @param token The token targeted by the call.
     * @param from The sender of the tokens
     * @param to The recipient of the tokens
     * @param value The amount of token to transfer
     * @param bubble Behavior switch if the transfer call reverts: bubble the revert reason or return a false boolean.
     */
    function _safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value,
        bool bubble
    ) private returns (bool success) {
        bytes4 selector = IERC20.transferFrom.selector;

        assembly ("memory-safe") {
            let fmp := mload(0x40)
            mstore(0x00, selector)
            mstore(0x04, and(from, shr(96, not(0))))
            mstore(0x24, and(to, shr(96, not(0))))
            mstore(0x44, value)
            success := call(gas(), token, 0, 0x00, 0x64, 0x00, 0x20)
            // if call success and return is true, all is good.
            // otherwise (not success or return is not true), we need to perform further checks
            if iszero(and(success, eq(mload(0x00), 1))) {
                // if the call was a failure and bubble is enabled, bubble the error
                if and(iszero(success), bubble) {
                    returndatacopy(fmp, 0x00, returndatasize())
                    revert(fmp, returndatasize())
                }
                // if the return value is not true, then the call is only successful if:
                // - the token address has code
                // - the returndata is empty
                success := and(success, and(iszero(returndatasize()), gt(extcodesize(token), 0)))
            }
            mstore(0x40, fmp)
            mstore(0x60, 0)
        }
    }

    /**
     * @dev Imitates a Solidity `token.approve(spender, value)` call, relaxing the requirement on the return value:
     * the return value is optional (but if data is returned, it must not be false).
     *
     * @param token The token targeted by the call.
     * @param spender The spender of the tokens
     * @param value The amount of token to transfer
     * @param bubble Behavior switch if the transfer call reverts: bubble the revert reason or return a false boolean.
     */
    function _safeApprove(IERC20 token, address spender, uint256 value, bool bubble) private returns (bool success) {
        bytes4 selector = IERC20.approve.selector;

        assembly ("memory-safe") {
            let fmp := mload(0x40)
            mstore(0x00, selector)
            mstore(0x04, and(spender, shr(96, not(0))))
            mstore(0x24, value)
            success := call(gas(), token, 0, 0x00, 0x44, 0x00, 0x20)
            // if call success and return is true, all is good.
            // otherwise (not success or return is not true), we need to perform further checks
            if iszero(and(success, eq(mload(0x00), 1))) {
                // if the call was a failure and bubble is enabled, bubble the error
                if and(iszero(success), bubble) {
                    returndatacopy(fmp, 0x00, returndatasize())
                    revert(fmp, returndatasize())
                }
                // if the return value is not true, then the call is only successful if:
                // - the token address has code
                // - the returndata is empty
                success := and(success, and(iszero(returndatasize()), gt(extcodesize(token), 0)))
            }
            mstore(0x40, fmp)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.5.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

import {StorageSlot} from "./StorageSlot.sol";

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 *
 * IMPORTANT: Deprecated. This storage-based reentrancy guard will be removed and replaced
 * by the {ReentrancyGuardTransient} variant in v6.0.
 *
 * @custom:stateless
 */
abstract contract ReentrancyGuard {
    using StorageSlot for bytes32;

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant REENTRANCY_GUARD_STORAGE =
        0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;

    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant NOT_ENTERED = 1;
    uint256 private constant ENTERED = 2;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _reentrancyGuardStorageSlot().getUint256Slot().value = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    /**
     * @dev A `view` only version of {nonReentrant}. Use to block view functions
     * from being called, preventing reading from inconsistent contract state.
     *
     * CAUTION: This is a "view" modifier and does not change the reentrancy
     * status. Use it only on view functions. For payable or non-payable functions,
     * use the standard {nonReentrant} modifier instead.
     */
    modifier nonReentrantView() {
        _nonReentrantBeforeView();
        _;
    }

    function _nonReentrantBeforeView() private view {
        if (_reentrancyGuardEntered()) {
            revert ReentrancyGuardReentrantCall();
        }
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        _nonReentrantBeforeView();

        // Any calls to nonReentrant after this point will fail
        _reentrancyGuardStorageSlot().getUint256Slot().value = ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _reentrancyGuardStorageSlot().getUint256Slot().value = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _reentrancyGuardStorageSlot().getUint256Slot().value == ENTERED;
    }

    function _reentrancyGuardStorageSlot() internal pure virtual returns (bytes32) {
        return REENTRANCY_GUARD_STORAGE;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)

pragma solidity >=0.6.2;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC-1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     // Define the slot. Alternatively, use the SlotDerivation library to derive the slot.
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(newImplementation.code.length > 0);
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * TIP: Consider using this library along with {SlotDerivation}.
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct Int256Slot {
        int256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Int256Slot` with member `value` located at `slot`.
     */
    function getInt256Slot(bytes32 slot) internal pure returns (Int256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns a `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }
}

File 7 of 9 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)

pragma solidity >=0.4.16;

import {IERC20} from "../token/ERC20/IERC20.sol";

File 8 of 9 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)

pragma solidity >=0.4.16;

import {IERC165} from "../utils/introspection/IERC165.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

Settings
{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts/lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false
}

Contract Security Audit

Contract ABI

API
[{"inputs":[{"internalType":"address","name":"_usdc","type":"address"},{"internalType":"address","name":"_identityRegistry","type":"address"},{"internalType":"uint256","name":"_epochDuration","type":"uint256"},{"internalType":"uint256","name":"_costPerEpoch","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AgentIdTaken","type":"error"},{"inputs":[],"name":"AlreadyDead","type":"error"},{"inputs":[],"name":"AlreadyHeartbeat","type":"error"},{"inputs":[],"name":"AlreadyRegistered","type":"error"},{"inputs":[],"name":"InvalidConfig","type":"error"},{"inputs":[],"name":"InvalidRange","type":"error"},{"inputs":[],"name":"MissedEpoch","type":"error"},{"inputs":[],"name":"NotAgentWallet","type":"error"},{"inputs":[],"name":"NotDeadYet","type":"error"},{"inputs":[],"name":"NotRegistered","type":"error"},{"inputs":[],"name":"NotTreasury","type":"error"},{"inputs":[],"name":"NothingToClaim","type":"error"},{"inputs":[],"name":"ReentrancyGuardReentrantCall","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[],"name":"ZeroAddress","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"agent","type":"address"},{"indexed":true,"internalType":"uint256","name":"agentId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"epoch","type":"uint256"}],"name":"Born","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"agent","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Claimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"agent","type":"address"},{"indexed":true,"internalType":"uint256","name":"agentId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"epoch","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"age","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"totalPaid","type":"uint256"}],"name":"Death","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"agent","type":"address"},{"indexed":false,"internalType":"uint256","name":"epoch","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"age","type":"uint256"}],"name":"Heartbeat","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"treasury","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"TreasuryClaimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oldTreasury","type":"address"},{"indexed":true,"internalType":"address","name":"newTreasury","type":"address"}],"name":"TreasuryTransferred","type":"event"},{"inputs":[],"name":"BPS_DENOMINATOR","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"COST_PER_EPOCH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"EPOCH_DURATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PRECISION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TREASURY_BPS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"accRewardPerAge","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"agentIdToAddr","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"agents","outputs":[{"internalType":"uint64","name":"birthEpoch","type":"uint64"},{"internalType":"uint64","name":"lastHeartbeatEpoch","type":"uint64"},{"internalType":"bool","name":"alive","type":"bool"},{"internalType":"uint96","name":"totalPaid","type":"uint96"},{"internalType":"uint256","name":"rewardDebt","type":"uint256"},{"internalType":"uint128","name":"claimable","type":"uint128"},{"internalType":"uint128","name":"totalClaimed","type":"uint128"},{"internalType":"uint256","name":"agentId","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimTreasury","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"currentEpoch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"getAge","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"startIndex","type":"uint256"},{"internalType":"uint256","name":"endIndex","type":"uint256"}],"name":"getAgentList","outputs":[{"components":[{"internalType":"address","name":"addr","type":"address"},{"internalType":"uint256","name":"agentId","type":"uint256"},{"internalType":"uint64","name":"birthEpoch","type":"uint64"},{"internalType":"uint64","name":"lastHeartbeatEpoch","type":"uint64"},{"internalType":"bool","name":"alive","type":"bool"},{"internalType":"bool","name":"killable","type":"bool"},{"internalType":"uint256","name":"age","type":"uint256"},{"internalType":"uint256","name":"totalPaid","type":"uint256"},{"internalType":"uint256","name":"totalClaimed","type":"uint256"},{"internalType":"uint256","name":"pendingReward","type":"uint256"}],"internalType":"struct LastAIStanding.AgentInfo[]","name":"agentList","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"startIndex","type":"uint256"},{"internalType":"uint256","name":"endIndex","type":"uint256"}],"name":"getKillable","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"heartbeat","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"identityRegistry","outputs":[{"internalType":"contract IERC8004","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"isAlive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"isKillable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"kill","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"pendingReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"agentId","type":"uint256"}],"name":"register","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"registry","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"registryAt","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"registryLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAge","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAlive","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalDead","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalEverRegistered","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalPool","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalRewardsDistributed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newTreasury","type":"address"}],"name":"transferTreasury","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"treasuryBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"usdc","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda029130000000000000000000000008004a169fb4a3325136eb29fa0ceb6d2e539a432000000000000000000000000000000000000000000000000000000000000025800000000000000000000000000000000000000000000000000000000000186a0

-----Decoded View---------------
Arg [0] : _usdc (address): 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Arg [1] : _identityRegistry (address): 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
Arg [2] : _epochDuration (uint256): 600
Arg [3] : _costPerEpoch (uint256): 100000

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda02913
Arg [1] : 0000000000000000000000008004a169fb4a3325136eb29fa0ceb6d2e539a432
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000258
Arg [3] : 00000000000000000000000000000000000000000000000000000000000186a0


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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.