false
false
0
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Contract Address Details

0x08f32278B2CFD962444ae9541122eD84cc745678

Contract Name
Heed
Creator
0x327fa3–a7c458 at 0x2e9d3f–e4927c
Balance
0 ETH
Tokens
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Transactions
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Transfers
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Gas Used
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Last Balance Update
6233084
Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
Contract name:
Heed




Optimization enabled
true
Compiler version
v0.8.27+commit.40a35a09




Optimization runs
1000000
EVM Version
shanghai




Verified at
2026-04-28T05:54:18.961352Z

Constructor Arguments

0x0000000000000000000000000000000000000000000000000000000000989680

Arg [0] (uint32) : 10000000

impl/Heed.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.27;

import {IHeed} from "iface/IHeed.sol";

contract Heed is IHeed {
    uint32 public immutable MAX_FEE_GWEI;

    mapping(address => EncKey[2])                       internal  _keys;
    mapping(address => uint32)                          public    feeGwei;
    mapping(address => mapping(address => bool))        public    trusts;
    mapping(address => address)                         public    delegateOwner;
    mapping(address => bytes32)                         public    delegateClient;

    constructor(uint32 maxFeeGwei) {
        MAX_FEE_GWEI = maxFeeGwei;
    }

    function publishKey(uint32 keyNonce, bytes32 pub) external {
        if (pub == bytes32(0)) revert EmptyPubKey();
        EncKey[2] storage slots = _keys[msg.sender];
        uint32 highest = slots[0].keyNonce > slots[1].keyNonce ? slots[0].keyNonce : slots[1].keyNonce;
        bool firstEverSlot = slots[0].pub == bytes32(0) && slots[1].pub == bytes32(0);
        if (!firstEverSlot && keyNonce <= highest) revert KeyNonceNotMonotonic(keyNonce, highest);

        uint8 victim;
        if (slots[0].pub == bytes32(0)) {
            victim = 0;
        } else if (slots[1].pub == bytes32(0)) {
            victim = 1;
        } else {
            victim = slots[0].keyNonce <= slots[1].keyNonce ? 0 : 1;
        }
        slots[victim] = EncKey({keyNonce: keyNonce, publishedAt: uint64(block.timestamp), pub: pub});
        emit KeyPublished(msg.sender, keyNonce, pub);
    }

    function getKeys(address owner) external view returns (EncKey[2] memory) {
        return _keys[owner];
    }

    function setFee(uint32 valueGwei) external {
        if (valueGwei > MAX_FEE_GWEI) revert FeeAboveCap(valueGwei, MAX_FEE_GWEI);
        feeGwei[msg.sender] = valueGwei;
        emit FeeUpdated(msg.sender, valueGwei);
    }
    function trust(address[] calldata senders) external {
        for (uint256 i; i < senders.length; ++i) {
            trusts[msg.sender][senders[i]] = true;
            emit Trusted(msg.sender, senders[i], true);
        }
    }

    function untrust(address[] calldata senders) external {
        for (uint256 i; i < senders.length; ++i) {
            trusts[msg.sender][senders[i]] = false;
            emit Trusted(msg.sender, senders[i], false);
        }
    }
    function registerDelegate(
        address delegate,
        bytes32 clientId,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable {
        if (delegate == address(0)) revert InvalidDelegateSignature();
        bytes32 digest = keccak256(
            abi.encode(
                bytes32("heed.delegate.v1"),
                block.chainid,
                address(this),
                msg.sender,
                delegate,
                clientId
            )
        );
        if (ecrecover(digest, v, r, s) != delegate) revert InvalidDelegateSignature();

        delegateOwner[delegate] = msg.sender;
        delegateClient[delegate] = clientId;
        emit DelegateRegistered(msg.sender, delegate, clientId);
        if (msg.value > 0) {
            (bool ok, ) = delegate.call{value: msg.value}("");
            require(ok, "fund-fail");
        }
    }

    function revokeDelegate(address delegate) external {
        require(delegateOwner[delegate] == msg.sender, "not-owner");
        address owner = msg.sender;
        delete delegateOwner[delegate];
        delete delegateClient[delegate];
        emit DelegateRevoked(owner, delegate);
    }

    function revokeMyself() external {
        address owner = delegateOwner[msg.sender];
        if (owner == address(0)) revert NotADelegate();
        delete delegateOwner[msg.sender];
        delete delegateClient[msg.sender];
        emit DelegateRevoked(owner, msg.sender);
    }
    function sendBatch(MailIntent[] calldata mails, bool atomic) external payable {
        address effectiveSender = delegateOwner[msg.sender] == address(0) ? msg.sender : delegateOwner[msg.sender];
        uint256 spent;

        for (uint256 i; i < mails.length; ++i) {
            MailIntent calldata m = mails[i];
            uint32 required = trusts[m.recipient][effectiveSender] ? 0 : feeGwei[m.recipient];

            if (m.valueGwei < required) {
                if (atomic) revert MailFailed(i);
                continue;
            }

            uint256 valueWei = uint256(m.valueGwei) * 1 gwei;
            if (spent + valueWei > msg.value) {
                if (atomic) revert InsufficientValue(spent + valueWei, msg.value);
                continue;
            }

            (bool ok, ) = m.recipient.call{value: valueWei}("");
            if (!ok) {
                if (atomic) revert MailFailed(i);
                continue;
            }

            spent += valueWei;
            emit MailSent(effectiveSender, m.recipient, m.contentRef, m.valueGwei);
        }

        if (msg.value > spent) {
            (bool ok, ) = msg.sender.call{value: msg.value - spent}("");
            require(ok, "refund-fail");
        }
    }
    function getInbox(address addr) public view returns (InboxView memory) {
        return InboxView({feeGwei: feeGwei[addr], keys: _keys[addr]});
    }

    function getInboxes(address[] calldata addrs) external view returns (InboxView[] memory out) {
        out = new InboxView[](addrs.length);
        for (uint256 i; i < addrs.length; ++i) out[i] = getInbox(addrs[i]);
    }
}

iface/IHeed.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.27;

interface IHeed {
    struct EncKey {
        uint32  keyNonce;
        uint64  publishedAt;
        bytes32 pub;
    }

    struct MailIntent {
        address recipient;
        uint32  valueGwei;
        bytes32 contentRef;
    }

    struct InboxView {
        uint32    feeGwei;
        EncKey[2] keys;
    }

    event KeyPublished(address indexed owner, uint32 keyNonce, bytes32 pub);
    event FeeUpdated(address indexed recipient, uint32 valueGwei);
    event Trusted(address indexed recipient, address indexed sender, bool trusted);
    event DelegateRegistered(address indexed owner, address indexed delegate, bytes32 clientId);
    event DelegateRevoked(address indexed owner, address indexed delegate);
    event MailSent(
        address indexed sender,
        address indexed recipient,
        bytes32 contentRef,
        uint32  valueGwei
    );

    error FeeAboveCap(uint32 valueGwei, uint32 cap);
    error KeyNonceNotMonotonic(uint32 provided, uint32 highest);
    error NotADelegate();
    error InsufficientValue(uint256 sumOfValues, uint256 msgValue);
    error MailFailed(uint256 index);
    error EmptyPubKey();
    error InvalidDelegateSignature();

    function MAX_FEE_GWEI() external view returns (uint32);
    function publishKey(uint32 keyNonce, bytes32 pub) external;
    function getKeys(address owner) external view returns (EncKey[2] memory);
    function setFee(uint32 valueGwei) external;
    function feeGwei(address) external view returns (uint32);
    function trust(address[] calldata senders) external;
    function untrust(address[] calldata senders) external;
    function trusts(address recipient, address sender) external view returns (bool);
    function registerDelegate(
        address delegate,
        bytes32 clientId,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable;
    function revokeDelegate(address delegate) external;
    function revokeMyself() external;
    function delegateOwner(address delegate) external view returns (address);
    function delegateClient(address delegate) external view returns (bytes32);
    function sendBatch(MailIntent[] calldata mails, bool atomic) external payable;
    function getInbox(address addr) external view returns (InboxView memory);
    function getInboxes(address[] calldata addrs) external view returns (InboxView[] memory);
}

Compiler Settings

{"viaIR":true,"remappings":["forge-std/=lib/forge-std/src/","impl/=impl/","iface/=iface/"],"outputSelection":{"*":{"*":["*"],"":["*"]}},"optimizer":{"runs":1000000,"enabled":true},"metadata":{"useLiteralContent":false,"bytecodeHash":"ipfs","appendCBOR":true},"libraries":{},"evmVersion":"shanghai"}

Contract ABI

[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"uint32","name":"maxFeeGwei","internalType":"uint32"}]},{"type":"error","name":"EmptyPubKey","inputs":[]},{"type":"error","name":"FeeAboveCap","inputs":[{"type":"uint32","name":"valueGwei","internalType":"uint32"},{"type":"uint32","name":"cap","internalType":"uint32"}]},{"type":"error","name":"InsufficientValue","inputs":[{"type":"uint256","name":"sumOfValues","internalType":"uint256"},{"type":"uint256","name":"msgValue","internalType":"uint256"}]},{"type":"error","name":"InvalidDelegateSignature","inputs":[]},{"type":"error","name":"KeyNonceNotMonotonic","inputs":[{"type":"uint32","name":"provided","internalType":"uint32"},{"type":"uint32","name":"highest","internalType":"uint32"}]},{"type":"error","name":"MailFailed","inputs":[{"type":"uint256","name":"index","internalType":"uint256"}]},{"type":"error","name":"NotADelegate","inputs":[]},{"type":"event","name":"DelegateRegistered","inputs":[{"type":"address","name":"owner","internalType":"address","indexed":true},{"type":"address","name":"delegate","internalType":"address","indexed":true},{"type":"bytes32","name":"clientId","internalType":"bytes32","indexed":false}],"anonymous":false},{"type":"event","name":"DelegateRevoked","inputs":[{"type":"address","name":"owner","internalType":"address","indexed":true},{"type":"address","name":"delegate","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"FeeUpdated","inputs":[{"type":"address","name":"recipient","internalType":"address","indexed":true},{"type":"uint32","name":"valueGwei","internalType":"uint32","indexed":false}],"anonymous":false},{"type":"event","name":"KeyPublished","inputs":[{"type":"address","name":"owner","internalType":"address","indexed":true},{"type":"uint32","name":"keyNonce","internalType":"uint32","indexed":false},{"type":"bytes32","name":"pub","internalType":"bytes32","indexed":false}],"anonymous":false},{"type":"event","name":"MailSent","inputs":[{"type":"address","name":"sender","internalType":"address","indexed":true},{"type":"address","name":"recipient","internalType":"address","indexed":true},{"type":"bytes32","name":"contentRef","internalType":"bytes32","indexed":false},{"type":"uint32","name":"valueGwei","internalType":"uint32","indexed":false}],"anonymous":false},{"type":"event","name":"Trusted","inputs":[{"type":"address","name":"recipient","internalType":"address","indexed":true},{"type":"address","name":"sender","internalType":"address","indexed":true},{"type":"bool","name":"trusted","internalType":"bool","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"uint32","name":"","internalType":"uint32"}],"name":"MAX_FEE_GWEI","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"delegateClient","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"delegateOwner","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint32","name":"","internalType":"uint32"}],"name":"feeGwei","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"tuple","name":"","internalType":"struct IHeed.InboxView","components":[{"type":"uint32","name":"feeGwei","internalType":"uint32"},{"type":"tuple[2]","name":"keys","internalType":"struct IHeed.EncKey[2]","components":[{"type":"uint32","name":"keyNonce","internalType":"uint32"},{"type":"uint64","name":"publishedAt","internalType":"uint64"},{"type":"bytes32","name":"pub","internalType":"bytes32"}]}]}],"name":"getInbox","inputs":[{"type":"address","name":"addr","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"tuple[]","name":"out","internalType":"struct IHeed.InboxView[]","components":[{"type":"uint32","name":"feeGwei","internalType":"uint32"},{"type":"tuple[2]","name":"keys","internalType":"struct IHeed.EncKey[2]","components":[{"type":"uint32","name":"keyNonce","internalType":"uint32"},{"type":"uint64","name":"publishedAt","internalType":"uint64"},{"type":"bytes32","name":"pub","internalType":"bytes32"}]}]}],"name":"getInboxes","inputs":[{"type":"address[]","name":"addrs","internalType":"address[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"tuple[2]","name":"","internalType":"struct IHeed.EncKey[2]","components":[{"type":"uint32","name":"keyNonce","internalType":"uint32"},{"type":"uint64","name":"publishedAt","internalType":"uint64"},{"type":"bytes32","name":"pub","internalType":"bytes32"}]}],"name":"getKeys","inputs":[{"type":"address","name":"owner","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"publishKey","inputs":[{"type":"uint32","name":"keyNonce","internalType":"uint32"},{"type":"bytes32","name":"pub","internalType":"bytes32"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"registerDelegate","inputs":[{"type":"address","name":"delegate","internalType":"address"},{"type":"bytes32","name":"clientId","internalType":"bytes32"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"revokeDelegate","inputs":[{"type":"address","name":"delegate","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"revokeMyself","inputs":[]},{"type":"function","stateMutability":"payable","outputs":[],"name":"sendBatch","inputs":[{"type":"tuple[]","name":"mails","internalType":"struct IHeed.MailIntent[]","components":[{"type":"address","name":"recipient","internalType":"address"},{"type":"uint32","name":"valueGwei","internalType":"uint32"},{"type":"bytes32","name":"contentRef","internalType":"bytes32"}]},{"type":"bool","name":"atomic","internalType":"bool"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setFee","inputs":[{"type":"uint32","name":"valueGwei","internalType":"uint32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"trust","inputs":[{"type":"address[]","name":"senders","internalType":"address[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"trusts","inputs":[{"type":"address","name":"","internalType":"address"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"untrust","inputs":[{"type":"address[]","name":"senders","internalType":"address[]"}]}]

Contract Creation Code

Verify & Publish 
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