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ERC-20
DeFi
Overview
Max Total Supply
11,035,000,000 T
Holders
7,399 ( 0.068%)
Market
Price
$0.02 @ 0.000009 ETH (-0.76%)
Onchain Market Cap
$253,005,293.55
Circulating Supply Market Cap
$224,861,372.00
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | ![]() | T-KRW | $0.0234 0.0000089 Eth | $5,786,348.00 247,506,552.153 T | 74.1567% |
2 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $1,623,237.00 70,758,426.100 T | 21.2003% |
3 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $1,026,825.00 44,762,856.300 T | 13.4116% |
4 | ![]() | T-VNST | $0.0229 0.0000087 Eth | $980,177.00 42,752,986.200 T | 12.8094% |
5 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $606,789.00 26,498,328.800 T | 7.9393% |
6 | ![]() | T-USDT | $0.023 0.0000087 Eth | $458,505.00 19,982,217.571 T | 5.9870% |
7 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $412,023.00 18,021,136.500 T | 5.3994% |
8 | ![]() | T-USDT | $0.023 0.0000087 Eth | $343,513.00 14,957,446.000 T | 4.4815% |
9 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $295,668.00 12,899,116.200 T | 3.8648% |
10 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $286,005.00 0.000 T | 0.0000% |
11 | ![]() | T-USD | $0.023 0.0000087 Eth | $269,888.00 11,759,810.000 T | 3.5234% |
12 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $249,469.00 10,876,703.400 T | 3.2588% |
13 | ![]() | T-KRW | $0.0234 0.0000089 Eth | $217,055.00 9,260,570.074 T | 2.7746% |
14 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $213,112.00 9,297,932.000 T | 2.7858% |
15 | ![]() | T-TRY | $0.023 0.0000087 Eth | $177,446.00 7,726,108.900 T | 2.3149% |
16 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $117,539.00 5,137,542.024 T | 1.5393% |
17 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $93,984.00 4,097,183.522 T | 1.2276% |
18 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $81,927.00 3,583,170.400 T | 1.0736% |
19 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $69,517.00 3,023,502.340 T | 0.9059% |
20 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $58,979.00 2,582,289.000 T | 0.7737% |
21 | ![]() | T-USDT | $0.023 0.0000087 Eth | $55,587.00 2,421,116.840 T | 0.7254% |
22 | ![]() | T-TRY | $0.0229 0.0000087 Eth | $51,287.00 2,242,288.000 T | 0.6718% |
23 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $48,917.00 2,140,640.380 T | 0.6414% |
24 | ![]() | 0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.0231 0.0000088 Eth | $44,569.00 1,897,137.127 0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5 | 0.5684% |
25 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $44,568.00 1,943,139.100 T | 0.5822% |
26 | ![]() | T-USDT | $0.023 0.0000088 Eth | $39,125.00 1,700,591.100 T | 0.5095% |
27 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $38,676.00 1,689,334.231 T | 0.5062% |
28 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $37,998.00 1,656,782.055 T | 0.4964% |
29 | ![]() | T-USDT | $0.023 0.0000088 Eth | $36,667.00 1,595,966.875 T | 0.4782% |
30 | ![]() | T-EUR | $0.0228 0.0000087 Eth | $34,666.00 1,520,768.981 T | 0.4556% |
31 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $33,329.00 1,452,175.041 T | 0.4351% |
32 | ![]() | T-USDT | $0.0226 0.0000087 Eth | $24,421.00 1,082,686.998 T | 0.3244% |
33 | ![]() | T-USDT | $0.023 0.0000088 Eth | $21,788.00 946,929.000 T | 0.2837% |
34 | ![]() | 0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.0232 0.0000088 Eth | $16,872.13 718,518.728 0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5 | 0.2153% |
35 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $16,868.20 735,112.580 T | 0.2203% |
36 | ![]() | T-USDT | $0.023 0.0000087 Eth | $16,280.60 709,170.000 T | 0.2125% |
37 | ![]() | T-TRY | $0.0229 0.0000087 Eth | $14,435.48 629,258.150 T | 0.1885% |
38 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $12,818.41 560,754.300 T | 0.1680% |
39 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $12,710.97 554,182.700 T | 0.1660% |
40 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $8,540.71 372,567.226 T | 0.1116% |
41 | ![]() | 0X18084FBA666A33D37592FA2633FD49A74DD93A88-0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5 | $0.0228 0.0000087 Eth | $6,855.05 0.117 0X18084FBA666A33D37592FA2633FD49A74DD93A88 | 0.0000% |
42 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $5,451.97 237,870.000 T | 0.0713% |
43 | ![]() | T-BTC | $0.0228 0.0000087 Eth | $4,580.04 201,079.325 T | 0.0602% |
44 | ![]() | T-USD | $0.0229 0.0000087 Eth | $3,271.22 142,630.000 T | 0.0427% |
45 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $3,164.22 138,521.674 T | 0.0415% |
46 | ![]() | T-EUR | $0.0227 0.0000086 Eth | $3,109.56 137,018.872 T | 0.0411% |
47 | ![]() | T-USDC | $0.0226 0.0000086 Eth | $3,099.66 135,007.780 T | 0.0405% |
48 | ![]() | 0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $0.0229 0.0000088 Eth | $2,255.06 98,377.900 0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5 | 0.0295% |
49 | ![]() | T-USDC | $0.022 0.0000084 Eth | $2,216.32 100,853.897 T | 0.0302% |
50 | ![]() | T-USD | $0.0229 0.0000087 Eth | $2,202.20 96,165.950 T | 0.0288% |
51 | ![]() | T-ETH | $0.0229 0.0000087 Eth | $2,070.05 87,369.837 T | 0.0262% |
52 | ![]() | T-KRW | $0.0231 0.0000088 Eth | $1,629.19 70,433.126 T | 0.0211% |
53 | ![]() | T-KRW | $0.0231 0.0000089 Eth | $1,115.31 48,148.827 T | 0.0144% |
54 | ![]() | T-USDT | $0.0229 0.0000087 Eth | $584.67 25,491.496 T | 0.0076% |
55 | ![]() | T-USDT | $0.0229 0.0000088 Eth | $193.54 8,442.673 T | 0.0025% |
56 | ![]() | T-USDT | $0.0221 0.0000084 Eth | $188.57 8,532.934 T | 0.0026% |
57 | ![]() | T-BTC | $0.0228 0.0000087 Eth | $105.64 4,637.399 T | 0.0014% |
58 | ![]() | T-USDT | $0.0231 0.0000088 Eth | $103.33 4,480.000 T | 0.0013% |
59 | ![]() | T-USDT | $0.0231 0.0000088 Eth | $103.31 4,480.000 T | 0.0013% |
60 | ![]() | T-IDR | $0.0229 0.0000087 Eth | $55.14 2,407.000 T | 0.0007% |
61 | ![]() | 0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.0403 0.0000158 Eth | $50.69 1,271.556 0XCDF7028CEAB81FA0C6971208E83FA7872994BEE5 | 0.0004% |
62 | ![]() | T-USDT | $0.0218 0.0000082 Eth | $43.24 1,989.000 T | 0.0006% |
63 | ![]() | THRESHOLD-IDR | $0.022 0.0000084 Eth | $16.50 749.288 THRESHOLD | 0.0002% |
64 | ![]() | T-USDT | $0.0223 0.0000085 Eth | $6.76 302.874 T | 0.0001% |
Contract Name:
T
Compiler Version
v0.8.9+commit.e5eed63a
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later // ██████████████ ▐████▌ ██████████████ // ██████████████ ▐████▌ ██████████████ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ██████████████ ▐████▌ ██████████████ // ██████████████ ▐████▌ ██████████████ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ pragma solidity 0.8.9; import "../governance/Checkpoints.sol"; import "@openzeppelin/contracts/utils/math/SafeCast.sol"; import "@thesis/solidity-contracts/contracts/token/ERC20WithPermit.sol"; import "@thesis/solidity-contracts/contracts/token/MisfundRecovery.sol"; /// @title T token /// @notice Threshold Network T token /// @dev By default, token balance does not account for voting power. /// This makes transfers cheaper. The downside is that it requires users /// to delegate to themselves to activate checkpoints and have their /// voting power tracked. contract T is ERC20WithPermit, MisfundRecovery, Checkpoints { /// @notice The EIP-712 typehash for the delegation struct used by /// `delegateBySig`. bytes32 public constant DELEGATION_TYPEHASH = keccak256( "Delegation(address delegatee,uint256 nonce,uint256 deadline)" ); constructor() ERC20WithPermit("Threshold Network Token", "T") {} /// @notice Delegates votes from signatory to `delegatee` /// @param delegatee The address to delegate votes to /// @param deadline The time at which to expire the signature /// @param v The recovery byte of the signature /// @param r Half of the ECDSA signature pair /// @param s Half of the ECDSA signature pair function delegateBySig( address signatory, address delegatee, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external { /* solhint-disable-next-line not-rely-on-time */ require(deadline >= block.timestamp, "Delegation expired"); // Validate `s` and `v` values for a malleability concern described in EIP2. // Only signatures with `s` value in the lower half of the secp256k1 // curve's order and `v` value of 27 or 28 are considered valid. require( uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "Invalid signature 's' value" ); require(v == 27 || v == 28, "Invalid signature 'v' value"); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR(), keccak256( abi.encode( DELEGATION_TYPEHASH, delegatee, nonce[signatory]++, deadline ) ) ) ); address recoveredAddress = ecrecover(digest, v, r, s); require( recoveredAddress != address(0) && recoveredAddress == signatory, "Invalid signature" ); return delegate(signatory, delegatee); } /// @notice Delegate votes from `msg.sender` to `delegatee`. /// @param delegatee The address to delegate votes to function delegate(address delegatee) public virtual { return delegate(msg.sender, delegatee); } // slither-disable-next-line dead-code function beforeTokenTransfer( address from, address to, uint256 amount ) internal override { uint96 safeAmount = SafeCast.toUint96(amount); // When minting: if (from == address(0)) { // Does not allow to mint more than uint96 can fit. Otherwise, the // Checkpoint might not fit the balance. require( totalSupply + amount <= maxSupply(), "Maximum total supply exceeded" ); writeCheckpoint(_totalSupplyCheckpoints, add, safeAmount); } // When burning: if (to == address(0)) { writeCheckpoint(_totalSupplyCheckpoints, subtract, safeAmount); } moveVotingPower(delegates(from), delegates(to), safeAmount); } function delegate(address delegator, address delegatee) internal virtual override { address currentDelegate = delegates(delegator); uint96 delegatorBalance = SafeCast.toUint96(balanceOf[delegator]); _delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); moveVotingPower(currentDelegate, delegatee, delegatorBalance); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) 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 `amount` 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 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 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 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), 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 data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/Address.sol) pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s; uint8 v; assembly { s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) v := add(shr(255, vs), 27) } return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * 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[EIP 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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a / b + (a % b == 0 ? 0 : 1); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/math/SafeCast.sol) pragma solidity ^0.8.0; /** * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow * checks. * * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such an operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. * * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing * all math on `uint256` and `int256` and then downcasting. */ library SafeCast { /** * @dev Returns the downcasted uint224 from uint256, reverting on * overflow (when the input is greater than largest uint224). * * Counterpart to Solidity's `uint224` operator. * * Requirements: * * - input must fit into 224 bits */ function toUint224(uint256 value) internal pure returns (uint224) { require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits"); return uint224(value); } /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits */ function toUint128(uint256 value) internal pure returns (uint128) { require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint96 from uint256, reverting on * overflow (when the input is greater than largest uint96). * * Counterpart to Solidity's `uint96` operator. * * Requirements: * * - input must fit into 96 bits */ function toUint96(uint256 value) internal pure returns (uint96) { require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits"); return uint96(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits */ function toUint64(uint256 value) internal pure returns (uint64) { require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits */ function toUint32(uint256 value) internal pure returns (uint32) { require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits */ function toUint16(uint256 value) internal pure returns (uint16) { require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits. */ function toUint8(uint256 value) internal pure returns (uint8) { require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Returns the downcasted int128 from int256, reverting on * overflow (when the input is less than smallest int128 or * greater than largest int128). * * Counterpart to Solidity's `int128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v3.1._ */ function toInt128(int256 value) internal pure returns (int128) { require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits"); return int128(value); } /** * @dev Returns the downcasted int64 from int256, reverting on * overflow (when the input is less than smallest int64 or * greater than largest int64). * * Counterpart to Solidity's `int64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v3.1._ */ function toInt64(int256 value) internal pure returns (int64) { require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits"); return int64(value); } /** * @dev Returns the downcasted int32 from int256, reverting on * overflow (when the input is less than smallest int32 or * greater than largest int32). * * Counterpart to Solidity's `int32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v3.1._ */ function toInt32(int256 value) internal pure returns (int32) { require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits"); return int32(value); } /** * @dev Returns the downcasted int16 from int256, reverting on * overflow (when the input is less than smallest int16 or * greater than largest int16). * * Counterpart to Solidity's `int16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v3.1._ */ function toInt16(int256 value) internal pure returns (int16) { require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits"); return int16(value); } /** * @dev Returns the downcasted int8 from int256, reverting on * overflow (when the input is less than smallest int8 or * greater than largest int8). * * Counterpart to Solidity's `int8` operator. * * Requirements: * * - input must fit into 8 bits. * * _Available since v3.1._ */ function toInt8(int256 value) internal pure returns (int8) { require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits"); return int8(value); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. */ function toInt256(uint256 value) internal pure returns (int256) { // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256"); return int256(value); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/access/Ownable.sol"; import "./IERC20WithPermit.sol"; import "./IReceiveApproval.sol"; /// @title ERC20WithPermit /// @notice Burnable ERC20 token with EIP2612 permit functionality. User can /// authorize a transfer of their token with a signature conforming /// EIP712 standard instead of an on-chain transaction from their /// address. Anyone can submit this signature on the user's behalf by /// calling the permit function, as specified in EIP2612 standard, /// paying gas fees, and possibly performing other actions in the same /// transaction. contract ERC20WithPermit is IERC20WithPermit, Ownable { /// @notice The amount of tokens owned by the given account. mapping(address => uint256) public override balanceOf; /// @notice The remaining number of tokens that spender will be /// allowed to spend on behalf of owner through `transferFrom` and /// `burnFrom`. This is zero by default. mapping(address => mapping(address => uint256)) public override allowance; /// @notice Returns the current nonce for EIP2612 permission for the /// provided token owner for a replay protection. Used to construct /// EIP2612 signature provided to `permit` function. mapping(address => uint256) public override nonce; uint256 public immutable cachedChainId; bytes32 public immutable cachedDomainSeparator; /// @notice Returns EIP2612 Permit message hash. Used to construct EIP2612 /// signature provided to `permit` function. bytes32 public constant override PERMIT_TYPEHASH = keccak256( "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)" ); /// @notice The amount of tokens in existence. uint256 public override totalSupply; /// @notice The name of the token. string public override name; /// @notice The symbol of the token. string public override symbol; /// @notice The decimals places of the token. uint8 public constant override decimals = 18; constructor(string memory _name, string memory _symbol) { name = _name; symbol = _symbol; cachedChainId = block.chainid; cachedDomainSeparator = buildDomainSeparator(); } /// @notice Moves `amount` tokens from the caller's account to `recipient`. /// @return True if the operation succeeded, reverts otherwise. /// @dev Requirements: /// - `recipient` cannot be the zero address, /// - the caller must have a balance of at least `amount`. function transfer(address recipient, uint256 amount) external override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } /// @notice Moves `amount` tokens from `spender` to `recipient` using the /// allowance mechanism. `amount` is then deducted from the caller's /// allowance unless the allowance was made for `type(uint256).max`. /// @return True if the operation succeeded, reverts otherwise. /// @dev Requirements: /// - `spender` and `recipient` cannot be the zero address, /// - `spender` must have a balance of at least `amount`, /// - the caller must have allowance for `spender`'s tokens of at least /// `amount`. function transferFrom( address spender, address recipient, uint256 amount ) external override returns (bool) { uint256 currentAllowance = allowance[spender][msg.sender]; if (currentAllowance != type(uint256).max) { require( currentAllowance >= amount, "Transfer amount exceeds allowance" ); _approve(spender, msg.sender, currentAllowance - amount); } _transfer(spender, recipient, amount); return true; } /// @notice EIP2612 approval made with secp256k1 signature. /// Users can authorize a transfer of their tokens with a signature /// conforming EIP712 standard, rather than an on-chain transaction /// from their address. Anyone can submit this signature on the /// user's behalf by calling the permit function, paying gas fees, /// and possibly performing other actions in the same transaction. /// @dev The deadline argument can be set to `type(uint256).max to create /// permits that effectively never expire. If the `amount` is set /// to `type(uint256).max` then `transferFrom` and `burnFrom` will /// not reduce an allowance. function permit( address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external override { /* solhint-disable-next-line not-rely-on-time */ require(deadline >= block.timestamp, "Permission expired"); // Validate `s` and `v` values for a malleability concern described in EIP2. // Only signatures with `s` value in the lower half of the secp256k1 // curve's order and `v` value of 27 or 28 are considered valid. require( uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "Invalid signature 's' value" ); require(v == 27 || v == 28, "Invalid signature 'v' value"); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR(), keccak256( abi.encode( PERMIT_TYPEHASH, owner, spender, amount, nonce[owner]++, deadline ) ) ) ); address recoveredAddress = ecrecover(digest, v, r, s); require( recoveredAddress != address(0) && recoveredAddress == owner, "Invalid signature" ); _approve(owner, spender, amount); } /// @notice Creates `amount` tokens and assigns them to `account`, /// increasing the total supply. /// @dev Requirements: /// - `recipient` cannot be the zero address. function mint(address recipient, uint256 amount) external onlyOwner { require(recipient != address(0), "Mint to the zero address"); beforeTokenTransfer(address(0), recipient, amount); totalSupply += amount; balanceOf[recipient] += amount; emit Transfer(address(0), recipient, amount); } /// @notice Destroys `amount` tokens from the caller. /// @dev Requirements: /// - the caller must have a balance of at least `amount`. function burn(uint256 amount) external override { _burn(msg.sender, amount); } /// @notice Destroys `amount` of tokens from `account` using the allowance /// mechanism. `amount` is then deducted from the caller's allowance /// unless the allowance was made for `type(uint256).max`. /// @dev Requirements: /// - `account` must have a balance of at least `amount`, /// - the caller must have allowance for `account`'s tokens of at least /// `amount`. function burnFrom(address account, uint256 amount) external override { uint256 currentAllowance = allowance[account][msg.sender]; if (currentAllowance != type(uint256).max) { require( currentAllowance >= amount, "Burn amount exceeds allowance" ); _approve(account, msg.sender, currentAllowance - amount); } _burn(account, amount); } /// @notice Calls `receiveApproval` function on spender previously approving /// the spender to withdraw from the caller multiple times, up to /// the `amount` amount. If this function is called again, it /// overwrites the current allowance with `amount`. Reverts if the /// approval reverted or if `receiveApproval` call on the spender /// reverted. /// @return True if both approval and `receiveApproval` calls succeeded. /// @dev If the `amount` is set to `type(uint256).max` then /// `transferFrom` and `burnFrom` will not reduce an allowance. function approveAndCall( address spender, uint256 amount, bytes memory extraData ) external override returns (bool) { if (approve(spender, amount)) { IReceiveApproval(spender).receiveApproval( msg.sender, amount, address(this), extraData ); return true; } return false; } /// @notice Sets `amount` as the allowance of `spender` over the caller's /// tokens. /// @return True if the operation succeeded. /// @dev If the `amount` is set to `type(uint256).max` then /// `transferFrom` and `burnFrom` will not reduce an allowance. /// 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 function approve(address spender, uint256 amount) public override returns (bool) { _approve(msg.sender, spender, amount); return true; } /// @notice Returns hash of EIP712 Domain struct with the token name as /// a signing domain and token contract as a verifying contract. /// Used to construct EIP2612 signature provided to `permit` /// function. /* solhint-disable-next-line func-name-mixedcase */ function DOMAIN_SEPARATOR() public view override returns (bytes32) { // As explained in EIP-2612, if the DOMAIN_SEPARATOR contains the // chainId and is defined at contract deployment instead of // reconstructed for every signature, there is a risk of possible replay // attacks between chains in the event of a future chain split. // To address this issue, we check the cached chain ID against the // current one and in case they are different, we build domain separator // from scratch. if (block.chainid == cachedChainId) { return cachedDomainSeparator; } else { return buildDomainSeparator(); } } /// @dev Hook that is called before any transfer of tokens. This includes /// minting and burning. /// /// Calling conditions: /// - when `from` and `to` are both non-zero, `amount` of `from`'s tokens /// will be to transferred to `to`. /// - when `from` is zero, `amount` tokens will be minted for `to`. /// - when `to` is zero, `amount` of ``from``'s tokens will be burned. /// - `from` and `to` are never both zero. // slither-disable-next-line dead-code function beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} function _burn(address account, uint256 amount) internal { uint256 currentBalance = balanceOf[account]; require(currentBalance >= amount, "Burn amount exceeds balance"); beforeTokenTransfer(account, address(0), amount); balanceOf[account] = currentBalance - amount; totalSupply -= amount; emit Transfer(account, address(0), amount); } function _transfer( address spender, address recipient, uint256 amount ) private { require(spender != address(0), "Transfer from the zero address"); require(recipient != address(0), "Transfer to the zero address"); require(recipient != address(this), "Transfer to the token address"); beforeTokenTransfer(spender, recipient, amount); uint256 spenderBalance = balanceOf[spender]; require(spenderBalance >= amount, "Transfer amount exceeds balance"); balanceOf[spender] = spenderBalance - amount; balanceOf[recipient] += amount; emit Transfer(spender, recipient, amount); } function _approve( address owner, address spender, uint256 amount ) private { require(owner != address(0), "Approve from the zero address"); require(spender != address(0), "Approve to the zero address"); allowance[owner][spender] = amount; emit Approval(owner, spender, amount); } function buildDomainSeparator() private view returns (bytes32) { return keccak256( abi.encode( keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ), keccak256(bytes(name)), keccak256(bytes("1")), block.chainid, address(this) ) ); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice An interface that should be implemented by tokens supporting /// `approveAndCall`/`receiveApproval` pattern. interface IApproveAndCall { /// @notice Executes `receiveApproval` function on spender as specified in /// `IReceiveApproval` interface. Approves spender to withdraw from /// the caller multiple times, up to the `amount`. If this /// function is called again, it overwrites the current allowance /// with `amount`. Reverts if the approval reverted or if /// `receiveApproval` call on the spender reverted. function approveAndCall( address spender, uint256 amount, bytes memory extraData ) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import "./IApproveAndCall.sol"; /// @title IERC20WithPermit /// @notice Burnable ERC20 token with EIP2612 permit functionality. User can /// authorize a transfer of their token with a signature conforming /// EIP712 standard instead of an on-chain transaction from their /// address. Anyone can submit this signature on the user's behalf by /// calling the permit function, as specified in EIP2612 standard, /// paying gas fees, and possibly performing other actions in the same /// transaction. interface IERC20WithPermit is IERC20, IERC20Metadata, IApproveAndCall { /// @notice EIP2612 approval made with secp256k1 signature. /// Users can authorize a transfer of their tokens with a signature /// conforming EIP712 standard, rather than an on-chain transaction /// from their address. Anyone can submit this signature on the /// user's behalf by calling the permit function, paying gas fees, /// and possibly performing other actions in the same transaction. /// @dev The deadline argument can be set to `type(uint256).max to create /// permits that effectively never expire. function permit( address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /// @notice Destroys `amount` tokens from the caller. function burn(uint256 amount) external; /// @notice Destroys `amount` of tokens from `account`, deducting the amount /// from caller's allowance. function burnFrom(address account, uint256 amount) external; /// @notice Returns hash of EIP712 Domain struct with the token name as /// a signing domain and token contract as a verifying contract. /// Used to construct EIP2612 signature provided to `permit` /// function. /* solhint-disable-next-line func-name-mixedcase */ function DOMAIN_SEPARATOR() external view returns (bytes32); /// @notice Returns the current nonce for EIP2612 permission for the /// provided token owner for a replay protection. Used to construct /// EIP2612 signature provided to `permit` function. function nonce(address owner) external view returns (uint256); /// @notice Returns EIP2612 Permit message hash. Used to construct EIP2612 /// signature provided to `permit` function. /* solhint-disable-next-line func-name-mixedcase */ function PERMIT_TYPEHASH() external pure returns (bytes32); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice An interface that should be implemented by contracts supporting /// `approveAndCall`/`receiveApproval` pattern. interface IReceiveApproval { /// @notice Receives approval to spend tokens. Called as a result of /// `approveAndCall` call on the token. function receiveApproval( address from, uint256 amount, address token, bytes calldata extraData ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; /// @title MisfundRecovery /// @notice Allows the owner of the token contract extending MisfundRecovery /// to recover any ERC20 and ERC721 sent mistakenly to the token /// contract address. contract MisfundRecovery is Ownable { using SafeERC20 for IERC20; function recoverERC20( IERC20 token, address recipient, uint256 amount ) external onlyOwner { token.safeTransfer(recipient, amount); } function recoverERC721( IERC721 token, address recipient, uint256 tokenId, bytes calldata data ) external onlyOwner { token.safeTransferFrom(address(this), recipient, tokenId, data); } }
// SPDX-License-Identifier: GPL-3.0-or-later // ██████████████ ▐████▌ ██████████████ // ██████████████ ▐████▌ ██████████████ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ██████████████ ▐████▌ ██████████████ // ██████████████ ▐████▌ ██████████████ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ pragma solidity 0.8.9; import "./IVotesHistory.sol"; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; import "@openzeppelin/contracts/utils/math/Math.sol"; import "@openzeppelin/contracts/utils/math/SafeCast.sol"; /// @title Checkpoints /// @dev Abstract contract to support checkpoints for Compound-like voting and /// delegation. This implementation supports token supply up to 2^96 - 1. /// This contract keeps a history (checkpoints) of each account's vote /// power. Vote power can be delegated either by calling the {delegate} /// function directly, or by providing a signature to be used with /// {delegateBySig}. Voting power can be publicly queried through /// {getVotes} and {getPastVotes}. /// NOTE: Extracted from OpenZeppelin ERCVotes.sol. abstract contract Checkpoints is IVotesHistory { struct Checkpoint { uint32 fromBlock; uint96 votes; } // slither-disable-next-line uninitialized-state mapping(address => address) internal _delegates; mapping(address => uint128[]) internal _checkpoints; uint128[] internal _totalSupplyCheckpoints; /// @notice Emitted when an account changes their delegate. event DelegateChanged( address indexed delegator, address indexed fromDelegate, address indexed toDelegate ); /// @notice Emitted when a balance or delegate change results in changes /// to an account's voting power. event DelegateVotesChanged( address indexed delegate, uint256 previousBalance, uint256 newBalance ); function checkpoints(address account, uint32 pos) public view virtual returns (Checkpoint memory checkpoint) { (uint32 fromBlock, uint96 votes) = decodeCheckpoint( _checkpoints[account][pos] ); checkpoint = Checkpoint(fromBlock, votes); } /// @notice Get number of checkpoints for `account`. function numCheckpoints(address account) public view virtual returns (uint32) { return SafeCast.toUint32(_checkpoints[account].length); } /// @notice Get the address `account` is currently delegating to. function delegates(address account) public view virtual returns (address) { return _delegates[account]; } /// @notice Gets the current votes balance for `account`. /// @param account The address to get votes balance /// @return The number of current votes for `account` function getVotes(address account) public view returns (uint96) { uint256 pos = _checkpoints[account].length; return pos == 0 ? 0 : decodeValue(_checkpoints[account][pos - 1]); } /// @notice Determine the prior number of votes for an account as of /// a block number. /// @dev Block number must be a finalized block or else this function will /// revert to prevent misinformation. /// @param account The address of the account to check /// @param blockNumber The block number to get the vote balance at /// @return The number of votes the account had as of the given block function getPastVotes(address account, uint256 blockNumber) public view returns (uint96) { return lookupCheckpoint(_checkpoints[account], blockNumber); } /// @notice Retrieve the `totalSupply` at the end of `blockNumber`. /// Note, this value is the sum of all balances, but it is NOT the /// sum of all the delegated votes! /// @param blockNumber The block number to get the total supply at /// @dev `blockNumber` must have been already mined function getPastTotalSupply(uint256 blockNumber) public view returns (uint96) { return lookupCheckpoint(_totalSupplyCheckpoints, blockNumber); } /// @notice Change delegation for `delegator` to `delegatee`. // slither-disable-next-line dead-code function delegate(address delegator, address delegatee) internal virtual; /// @notice Moves voting power from one delegate to another /// @param src Address of old delegate /// @param dst Address of new delegate /// @param amount Voting power amount to transfer between delegates function moveVotingPower( address src, address dst, uint256 amount ) internal { if (src != dst && amount > 0) { if (src != address(0)) { // https://github.com/crytic/slither/issues/960 // slither-disable-next-line variable-scope (uint256 oldWeight, uint256 newWeight) = writeCheckpoint( _checkpoints[src], subtract, amount ); emit DelegateVotesChanged(src, oldWeight, newWeight); } if (dst != address(0)) { // https://github.com/crytic/slither/issues/959 // slither-disable-next-line uninitialized-local (uint256 oldWeight, uint256 newWeight) = writeCheckpoint( _checkpoints[dst], add, amount ); emit DelegateVotesChanged(dst, oldWeight, newWeight); } } } /// @notice Writes a new checkpoint based on operating last stored value /// with a `delta`. Usually, said operation is the `add` or /// `subtract` functions from this contract, but more complex /// functions can be passed as parameters. /// @param ckpts The checkpoints array to use /// @param op The function to apply over the last value and the `delta` /// @param delta Variation with respect to last stored value to be used /// for new checkpoint function writeCheckpoint( uint128[] storage ckpts, function(uint256, uint256) view returns (uint256) op, uint256 delta ) internal returns (uint256 oldWeight, uint256 newWeight) { uint256 pos = ckpts.length; oldWeight = pos == 0 ? 0 : decodeValue(ckpts[pos - 1]); newWeight = op(oldWeight, delta); if (pos > 0) { uint32 fromBlock = decodeBlockNumber(ckpts[pos - 1]); // slither-disable-next-line incorrect-equality if (fromBlock == block.number) { ckpts[pos - 1] = encodeCheckpoint( fromBlock, SafeCast.toUint96(newWeight) ); return (oldWeight, newWeight); } } ckpts.push( encodeCheckpoint( SafeCast.toUint32(block.number), SafeCast.toUint96(newWeight) ) ); } /// @notice Lookup a value in a list of (sorted) checkpoints. /// @param ckpts The checkpoints array to use /// @param blockNumber Block number when we want to get the checkpoint at function lookupCheckpoint(uint128[] storage ckpts, uint256 blockNumber) internal view returns (uint96) { // We run a binary search to look for the earliest checkpoint taken // after `blockNumber`. During the loop, the index of the wanted // checkpoint remains in the range [low-1, high). With each iteration, // either `low` or `high` is moved towards the middle of the range to // maintain the invariant. // - If the middle checkpoint is after `blockNumber`, // we look in [low, mid) // - If the middle checkpoint is before or equal to `blockNumber`, // we look in [mid+1, high) // Once we reach a single value (when low == high), we've found the // right checkpoint at the index high-1, if not out of bounds (in that // case we're looking too far in the past and the result is 0). // Note that if the latest checkpoint available is exactly for // `blockNumber`, we end up with an index that is past the end of the // array, so we technically don't find a checkpoint after // `blockNumber`, but it works out the same. require(blockNumber < block.number, "Block not yet determined"); uint256 high = ckpts.length; uint256 low = 0; while (low < high) { uint256 mid = Math.average(low, high); uint32 midBlock = decodeBlockNumber(ckpts[mid]); if (midBlock > blockNumber) { high = mid; } else { low = mid + 1; } } return high == 0 ? 0 : decodeValue(ckpts[high - 1]); } /// @notice Maximum token supply. Defaults to `type(uint96).max` (2^96 - 1) // slither-disable-next-line dead-code function maxSupply() internal view virtual returns (uint96) { return type(uint96).max; } /// @notice Encodes a `blockNumber` and `value` into a single `uint128` /// checkpoint. /// @dev `blockNumber` is stored in the first 32 bits, while `value` in the /// remaining 96 bits. function encodeCheckpoint(uint32 blockNumber, uint96 value) internal pure returns (uint128) { return (uint128(blockNumber) << 96) | uint128(value); } /// @notice Decodes a block number from a `uint128` `checkpoint`. function decodeBlockNumber(uint128 checkpoint) internal pure returns (uint32) { return uint32(bytes4(bytes16(checkpoint))); } /// @notice Decodes a voting value from a `uint128` `checkpoint`. function decodeValue(uint128 checkpoint) internal pure returns (uint96) { return uint96(checkpoint); } /// @notice Decodes a block number and voting value from a `uint128` /// `checkpoint`. function decodeCheckpoint(uint128 checkpoint) internal pure returns (uint32 blockNumber, uint96 value) { blockNumber = decodeBlockNumber(checkpoint); value = decodeValue(checkpoint); } // slither-disable-next-line dead-code function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } // slither-disable-next-line dead-code function subtract(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } }
// SPDX-License-Identifier: GPL-3.0-or-later // ██████████████ ▐████▌ ██████████████ // ██████████████ ▐████▌ ██████████████ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ██████████████ ▐████▌ ██████████████ // ██████████████ ▐████▌ ██████████████ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ // ▐████▌ ▐████▌ pragma solidity 0.8.9; interface IVotesHistory { function getPastVotes(address account, uint256 blockNumber) external view returns (uint96); function getPastTotalSupply(uint256 blockNumber) external view returns (uint96); }
{ "evmVersion": "london", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 100 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"address","name":"fromDelegate","type":"address"},{"indexed":true,"internalType":"address","name":"toDelegate","type":"address"}],"name":"DelegateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegate","type":"address"},{"indexed":false,"internalType":"uint256","name":"previousBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newBalance","type":"uint256"}],"name":"DelegateVotesChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DELEGATION_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"name":"approveAndCall","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"cachedChainId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"cachedDomainSeparator","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint32","name":"pos","type":"uint32"}],"name":"checkpoints","outputs":[{"components":[{"internalType":"uint32","name":"fromBlock","type":"uint32"},{"internalType":"uint96","name":"votes","type":"uint96"}],"internalType":"struct Checkpoints.Checkpoint","name":"checkpoint","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"delegatee","type":"address"}],"name":"delegate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"signatory","type":"address"},{"internalType":"address","name":"delegatee","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"delegateBySig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"delegates","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getPastTotalSupply","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getPastVotes","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getVotes","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"numCheckpoints","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"recoverERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC721","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"recoverERC721","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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