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Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
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- Contract name:
- ArchToken
- Optimization enabled
- true
- Compiler version
- v0.7.4+commit.3f05b770
- Optimization runs
- 999999
- EVM Version
- istanbul
- Verified at
- 2026-02-08T13:17:38.096970Z
Constructor Arguments
00000000000000000000000013d5b8fc84f73fc5a0a5832aa8373044371314d30000000000000000000000004f8f512dab59f227ea70b1d8a0044afa95cc80c30000000000000000000000000000000000000000000000000000000060a4fdc0
Arg [0] (address) : 0x13d5b8fc84f73fc5a0a5832aa8373044371314d3
Arg [1] (address) : 0x4f8f512dab59f227ea70b1d8a0044afa95cc80c3
Arg [2] (uint256) : 1621425600
contracts/ArchToken.sol
/************************************************************************
~~~ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\ ~~~~
~~~ @@@@@@ ░█████╗░██████╗░░█████╗░██╗░░██╗███████╗██████╗░ @@@@@@ | ~~~
~~~ @@@@@ ██╔══██╗██╔══██╗██╔══██╗██║░░██║██╔════╝██╔══██╗ @@@@@ | ~~~
~~~ @@@@@ ███████║██████╔╝██║░░╚═╝███████║█████╗░░██████╔╝ @@@@@@ | ~~~
~~~ @@@@@ ██╔══██║██╔══██╗██║░░██╗██╔══██║██╔══╝░░██╔══██╗ @@@@@ | ~~~
~~~ @@@@@ ██║░░██║██║░░██║╚█████╔╝██║░░██║███████╗██║░░██║ @@@@@ | ~~~
~~~ @@@@@ ╚═╝░░╚═╝╚═╝░░╚═╝░╚════╝░╚═╝░░╚═╝╚══════╝╚═╝░░╚═╝ @@@@@ | ~~~
~~~ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | ~~~
~~~ \_____________________________________________________________\| ~~~
************************************************************************/
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
pragma experimental ABIEncoderV2;
import "./lib/SafeMath.sol";
/**
* @title ArchToken
* @dev The governance token for Archer DAO
* ERC-20 with supply controls + add-ons to allow for offchain signing
* See EIP-712, EIP-2612, and EIP-3009 for details
*/
contract ArchToken {
using SafeMath for uint256;
/// @notice EIP-20 token name for this token
string public name = "Archer DAO Governance Token";
/// @notice EIP-20 token symbol for this token
string public symbol = "ARCH";
/// @notice EIP-20 token decimals for this token
uint8 public constant decimals = 18;
/// @notice Total number of tokens in circulation
uint256 public totalSupply = 100_000_000e18; // 100 million
/// @notice Address which may mint/burn tokens
address public supplyManager;
/// @notice Address which may change token metadata
address public metadataManager;
/// @notice The timestamp after which a supply change may occur
uint256 public supplyChangeAllowedAfter;
/// @notice The initial minimum time between changing the token supply
uint32 public supplyChangeWaitingPeriod = 1 days * 365;
/// @notice Hard cap on the minimum time between changing the token supply
uint32 public constant supplyChangeWaitingPeriodMinimum = 1 days * 90;
/// @notice Cap on the total amount that can be minted at each mint (measured in bips: 10,000 bips = 1% of current totalSupply)
uint16 public mintCap = 20_000;
/// @dev Allowance amounts on behalf of others
mapping (address => mapping (address => uint256)) internal allowances;
/// @dev Official record of token balances for each account
mapping (address => uint256) internal balances;
/// @notice The EIP-712 typehash for the contract's domain
/// keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")
bytes32 public constant DOMAIN_TYPEHASH = 0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f;
/// @notice The EIP-712 version hash
/// keccak256("1");
bytes32 public constant VERSION_HASH = 0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6;
/// @notice The EIP-712 typehash for permit (EIP-2612)
/// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
/// @notice The EIP-712 typehash for transferWithAuthorization (EIP-3009)
/// keccak256("TransferWithAuthorization(address from,address to,uint256 value,uint256 validAfter,uint256 validBefore,bytes32 nonce)");
bytes32 public constant TRANSFER_WITH_AUTHORIZATION_TYPEHASH = 0x7c7c6cdb67a18743f49ec6fa9b35f50d52ed05cbed4cc592e13b44501c1a2267;
/// @notice The EIP-712 typehash for receiveWithAuthorization (EIP-3009)
/// keccak256("ReceiveWithAuthorization(address from,address to,uint256 value,uint256 validAfter,uint256 validBefore,bytes32 nonce)")
bytes32 public constant RECEIVE_WITH_AUTHORIZATION_TYPEHASH = 0xd099cc98ef71107a616c4f0f941f04c322d8e254fe26b3c6668db87aae413de8;
/// @notice A record of states for signing / validating signatures
mapping (address => uint) public nonces;
/// @dev authorizer address > nonce > state (true = used / false = unused)
mapping (address => mapping (bytes32 => bool)) public authorizationState;
/// @notice An event that's emitted when the mintCap is changed
event MintCapChanged(uint16 indexed oldMintCap, uint16 indexed newMintCap);
/// @notice An event that's emitted when the supplyManager address is changed
event SupplyManagerChanged(address indexed oldManager, address indexed newManager);
/// @notice An event that's emitted when the supplyChangeWaitingPeriod is changed
event SupplyChangeWaitingPeriodChanged(uint32 indexed oldWaitingPeriod, uint32 indexed newWaitingPeriod);
/// @notice An event that's emitted when the metadataManager address is changed
event MetadataManagerChanged(address indexed oldManager, address indexed newManager);
/// @notice An event that's emitted when the token name and symbol are changed
event TokenMetaUpdated(string indexed name, string indexed symbol);
/// @notice The standard EIP-20 transfer event
event Transfer(address indexed from, address indexed to, uint256 value);
/// @notice The standard EIP-20 approval event
event Approval(address indexed owner, address indexed spender, uint256 value);
/// @notice An event that's emitted whenever an authorized transfer occurs
event AuthorizationUsed(address indexed authorizer, bytes32 indexed nonce);
/**
* @notice Construct a new Arch token
* @param _metadataManager The account with the ability to change token metadata
* @param _supplyManager The address with minting ability
* @param _firstSupplyChangeAllowed The timestamp after which the first supply change may occur
*/
constructor(address _metadataManager, address _supplyManager, uint256 _firstSupplyChangeAllowed) {
require(_firstSupplyChangeAllowed >= block.timestamp, "Arch::constructor: minting can only begin after deployment");
balances[msg.sender] = totalSupply;
emit Transfer(address(0), msg.sender, totalSupply);
supplyChangeAllowedAfter = _firstSupplyChangeAllowed;
supplyManager = _supplyManager;
emit SupplyManagerChanged(address(0), _supplyManager);
metadataManager = _metadataManager;
emit MetadataManagerChanged(address(0), metadataManager);
}
/**
* @notice Change the supplyManager address
* @param newSupplyManager The address of the new supply manager
* @return true if successful
*/
function setSupplyManager(address newSupplyManager) external returns (bool) {
require(msg.sender == supplyManager, "Arch::setSupplyManager: only SM can change SM");
emit SupplyManagerChanged(supplyManager, newSupplyManager);
supplyManager = newSupplyManager;
return true;
}
/**
* @notice Change the metadataManager address
* @param newMetadataManager The address of the new metadata manager
* @return true if successful
*/
function setMetadataManager(address newMetadataManager) external returns (bool) {
require(msg.sender == metadataManager, "Arch::setMetadataManager: only MM can change MM");
emit MetadataManagerChanged(metadataManager, newMetadataManager);
metadataManager = newMetadataManager;
return true;
}
/**
* @notice Mint new tokens
* @param dst The address of the destination account
* @param amount The number of tokens to be minted
* @return Boolean indicating success of mint
*/
function mint(address dst, uint256 amount) external returns (bool) {
require(msg.sender == supplyManager, "Arch::mint: only the supplyManager can mint");
require(dst != address(0), "Arch::mint: cannot transfer to the zero address");
require(amount <= totalSupply.mul(mintCap).div(1000000), "Arch::mint: exceeded mint cap");
require(block.timestamp >= supplyChangeAllowedAfter, "Arch::mint: minting not allowed yet");
// update the next supply change allowed timestamp
supplyChangeAllowedAfter = block.timestamp.add(supplyChangeWaitingPeriod);
// mint the amount
_mint(dst, amount);
return true;
}
/**
* @notice Burn tokens
* @param src The account that will burn tokens
* @param amount The number of tokens to be burned
* @return Boolean indicating success of burn
*/
function burn(address src, uint256 amount) external returns (bool) {
address spender = msg.sender;
require(spender == supplyManager, "Arch::burn: only the supplyManager can burn");
require(src != address(0), "Arch::burn: cannot transfer from the zero address");
require(block.timestamp >= supplyChangeAllowedAfter, "Arch::burn: burning not allowed yet");
uint256 spenderAllowance = allowances[src][spender];
// check allowance and reduce by amount
if (spender != src && spenderAllowance != uint256(-1)) {
uint256 newAllowance = spenderAllowance.sub(
amount,
"Arch::burn: burn amount exceeds allowance"
);
allowances[src][spender] = newAllowance;
emit Approval(src, spender, newAllowance);
}
// update the next supply change allowed timestamp
supplyChangeAllowedAfter = block.timestamp.add(supplyChangeWaitingPeriod);
// burn the amount
_burn(src, amount);
return true;
}
/**
* @notice Set the maximum amount of tokens that can be minted at once
* @param newCap The new mint cap in bips (10,000 bips = 1% of totalSupply)
* @return true if successful
*/
function setMintCap(uint16 newCap) external returns (bool) {
require(msg.sender == supplyManager, "Arch::setMintCap: only SM can change mint cap");
emit MintCapChanged(mintCap, newCap);
mintCap = newCap;
return true;
}
/**
* @notice Set the minimum time between supply changes
* @param period The new supply change waiting period
* @return true if succssful
*/
function setSupplyChangeWaitingPeriod(uint32 period) external returns (bool) {
require(msg.sender == supplyManager, "Arch::setSupplyChangeWaitingPeriod: only SM can change waiting period");
require(period >= supplyChangeWaitingPeriodMinimum, "Arch::setSupplyChangeWaitingPeriod: waiting period must be > minimum");
emit SupplyChangeWaitingPeriodChanged(supplyChangeWaitingPeriod, period);
supplyChangeWaitingPeriod = period;
return true;
}
/**
* @notice Update the token name and symbol
* @param tokenName The new name for the token
* @param tokenSymbol The new symbol for the token
* @return true if successful
*/
function updateTokenMetadata(string memory tokenName, string memory tokenSymbol) external returns (bool) {
require(msg.sender == metadataManager, "Arch::updateTokenMeta: only MM can update token metadata");
name = tokenName;
symbol = tokenSymbol;
emit TokenMetaUpdated(name, symbol);
return true;
}
/**
* @notice Get the number of tokens `spender` is approved to spend on behalf of `account`
* @param account The address of the account holding the funds
* @param spender The address of the account spending the funds
* @return The number of tokens approved
*/
function allowance(address account, address spender) external view returns (uint) {
return allowances[account][spender];
}
/**
* @notice Approve `spender` to transfer up to `amount` from `src`
* @dev This will overwrite the approval amount for `spender`
* and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
* It is recommended to use increaseAllowance and decreaseAllowance instead
* @param spender The address of the account which may transfer tokens
* @param amount The number of tokens that are approved (2^256-1 means infinite)
* @return Whether or not the approval succeeded
*/
function approve(address spender, uint256 amount) external returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
/**
* @notice Increase the allowance by a given amount
* @param spender Spender's address
* @param addedValue Amount of increase in allowance
* @return True if successful
*/
function increaseAllowance(address spender, uint256 addedValue)
external
returns (bool)
{
_increaseAllowance(msg.sender, spender, addedValue);
return true;
}
/**
* @notice Decrease the allowance by a given amount
* @param spender Spender's address
* @param subtractedValue Amount of decrease in allowance
* @return True if successful
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
external
returns (bool)
{
_decreaseAllowance(msg.sender, spender, subtractedValue);
return true;
}
/**
* @notice Triggers an approval from owner to spender
* @param owner The address to approve from
* @param spender The address to be approved
* @param value The number of tokens that are approved (2^256-1 means infinite)
* @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 permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external {
require(deadline >= block.timestamp, "Arch::permit: signature expired");
bytes32 encodeData = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline));
_validateSignedData(owner, encodeData, v, r, s);
_approve(owner, spender, value);
}
/**
* @notice Get the number of tokens held by the `account`
* @param account The address of the account to get the balance of
* @return The number of tokens held
*/
function balanceOf(address account) external view returns (uint) {
return balances[account];
}
/**
* @notice Transfer `amount` tokens from `msg.sender` to `dst`
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transfer(address dst, uint256 amount) external returns (bool) {
_transferTokens(msg.sender, dst, amount);
return true;
}
/**
* @notice Transfer `amount` tokens from `src` to `dst`
* @param src The address of the source account
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transferFrom(address src, address dst, uint256 amount) external returns (bool) {
address spender = msg.sender;
uint256 spenderAllowance = allowances[src][spender];
if (spender != src && spenderAllowance != uint256(-1)) {
uint256 newAllowance = spenderAllowance.sub(
amount,
"Arch::transferFrom: transfer amount exceeds allowance"
);
allowances[src][spender] = newAllowance;
emit Approval(src, spender, newAllowance);
}
_transferTokens(src, dst, amount);
return true;
}
/**
* @notice Transfer tokens with a signed authorization
* @param from Payer's address (Authorizer)
* @param to Payee's address
* @param value Amount to be transferred
* @param validAfter The time after which this is valid (unix time)
* @param validBefore The time before which this is valid (unix time)
* @param nonce Unique nonce
* @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 transferWithAuthorization(
address from,
address to,
uint256 value,
uint256 validAfter,
uint256 validBefore,
bytes32 nonce,
uint8 v,
bytes32 r,
bytes32 s
)
external
{
require(block.timestamp > validAfter, "Arch::transferWithAuth: auth not yet valid");
require(block.timestamp < validBefore, "Arch::transferWithAuth: auth expired");
require(!authorizationState[from][nonce], "Arch::transferWithAuth: auth already used");
bytes32 encodeData = keccak256(abi.encode(TRANSFER_WITH_AUTHORIZATION_TYPEHASH, from, to, value, validAfter, validBefore, nonce));
_validateSignedData(from, encodeData, v, r, s);
authorizationState[from][nonce] = true;
emit AuthorizationUsed(from, nonce);
_transferTokens(from, to, value);
}
/**
* @notice Receive a transfer with a signed authorization from the payer
* @dev This has an additional check to ensure that the payee's address matches
* the caller of this function to prevent front-running attacks.
* @param from Payer's address (Authorizer)
* @param to Payee's address
* @param value Amount to be transferred
* @param validAfter The time after which this is valid (unix time)
* @param validBefore The time before which this is valid (unix time)
* @param nonce Unique nonce
* @param v v of the signature
* @param r r of the signature
* @param s s of the signature
*/
function receiveWithAuthorization(
address from,
address to,
uint256 value,
uint256 validAfter,
uint256 validBefore,
bytes32 nonce,
uint8 v,
bytes32 r,
bytes32 s
) external {
require(to == msg.sender, "Arch::receiveWithAuth: caller must be the payee");
require(block.timestamp > validAfter, "Arch::receiveWithAuth: auth not yet valid");
require(block.timestamp < validBefore, "Arch::receiveWithAuth: auth expired");
require(!authorizationState[from][nonce], "Arch::receiveWithAuth: auth already used");
bytes32 encodeData = keccak256(abi.encode(RECEIVE_WITH_AUTHORIZATION_TYPEHASH, from, to, value, validAfter, validBefore, nonce));
_validateSignedData(from, encodeData, v, r, s);
authorizationState[from][nonce] = true;
emit AuthorizationUsed(from, nonce);
_transferTokens(from, to, value);
}
/**
* @notice EIP-712 Domain separator
* @return Separator
*/
function getDomainSeparator() public view returns (bytes32) {
return keccak256(
abi.encode(
DOMAIN_TYPEHASH,
keccak256(bytes(name)),
VERSION_HASH,
_getChainId(),
address(this)
)
);
}
/**
* @notice Recovers address from signed data and validates the signature
* @param signer Address that signed the data
* @param encodeData Data signed by the address
* @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 _validateSignedData(address signer, bytes32 encodeData, uint8 v, bytes32 r, bytes32 s) internal view {
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
getDomainSeparator(),
encodeData
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
// Explicitly disallow authorizations for address(0) as ecrecover returns address(0) on malformed messages
require(recoveredAddress != address(0) && recoveredAddress == signer, "Arch::validateSig: invalid signature");
}
/**
* @notice Approval implementation
* @param owner The address of the account which owns tokens
* @param spender The address of the account which may transfer tokens
* @param amount The number of tokens that are approved (2^256-1 means infinite)
*/
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "Arch::_approve: approve from the zero address");
require(spender != address(0), "Arch::_approve: approve to the zero address");
allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _increaseAllowance(
address owner,
address spender,
uint256 addedValue
) internal {
_approve(owner, spender, allowances[owner][spender].add(addedValue));
}
function _decreaseAllowance(
address owner,
address spender,
uint256 subtractedValue
) internal {
_approve(
owner,
spender,
allowances[owner][spender].sub(
subtractedValue,
"Arch::_decreaseAllowance: decreased allowance below zero"
)
);
}
/**
* @notice Transfer implementation
* @param from The address of the account which owns tokens
* @param to The address of the account which is receiving tokens
* @param value The number of tokens that are being transferred
*/
function _transferTokens(address from, address to, uint256 value) internal {
require(to != address(0), "Arch::_transferTokens: cannot transfer to the zero address");
balances[from] = balances[from].sub(
value,
"Arch::_transferTokens: transfer exceeds from balance"
);
balances[to] = balances[to].add(value);
emit Transfer(from, to, value);
}
/**
* @notice Mint implementation
* @param to The address of the account which is receiving tokens
* @param value The number of tokens that are being minted
*/
function _mint(address to, uint256 value) internal {
totalSupply = totalSupply.add(value);
balances[to] = balances[to].add(value);
emit Transfer(address(0), to, value);
}
/**
* @notice Burn implementation
* @param from The address of the account which owns tokens
* @param value The number of tokens that are being burned
*/
function _burn(address from, uint256 value) internal {
balances[from] = balances[from].sub(
value,
"Arch::_burn: burn amount exceeds from balance"
);
totalSupply = totalSupply.sub(
value,
"Arch::_burn: burn amount exceeds total supply"
);
emit Transfer(from, address(0), value);
}
/**
* @notice Current id of the chain where this contract is deployed
* @return Chain id
*/
function _getChainId() internal pure returns (uint) {
uint256 chainId;
assembly { chainId := chainid() }
return chainId;
}
}
/
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
// From https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/Math.sol
// Subject to the MIT license.
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when 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.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the addition of two unsigned integers, reverting with custom message on overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, errorMessage);
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot underflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction underflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot underflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, errorMessage);
return c;
}
/**
* @dev Returns the integer division of two unsigned integers.
* Reverts on division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers.
* Reverts with custom message on division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
Compiler Settings
{"remappings":[],"optimizer":{"runs":999999,"enabled":true},"metadata":{"useLiteralContent":true,"bytecodeHash":"ipfs"},"libraries":{},"evmVersion":"istanbul","compilationTarget":{"contracts/ArchToken.sol":"ArchToken"}}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_metadataManager","internalType":"address"},{"type":"address","name":"_supplyManager","internalType":"address"},{"type":"uint256","name":"_firstSupplyChangeAllowed","internalType":"uint256"}]},{"type":"event","name":"Approval","inputs":[{"type":"address","name":"owner","internalType":"address","indexed":true},{"type":"address","name":"spender","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"AuthorizationUsed","inputs":[{"type":"address","name":"authorizer","internalType":"address","indexed":true},{"type":"bytes32","name":"nonce","internalType":"bytes32","indexed":true}],"anonymous":false},{"type":"event","name":"MetadataManagerChanged","inputs":[{"type":"address","name":"oldManager","internalType":"address","indexed":true},{"type":"address","name":"newManager","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"MintCapChanged","inputs":[{"type":"uint16","name":"oldMintCap","internalType":"uint16","indexed":true},{"type":"uint16","name":"newMintCap","internalType":"uint16","indexed":true}],"anonymous":false},{"type":"event","name":"SupplyChangeWaitingPeriodChanged","inputs":[{"type":"uint32","name":"oldWaitingPeriod","internalType":"uint32","indexed":true},{"type":"uint32","name":"newWaitingPeriod","internalType":"uint32","indexed":true}],"anonymous":false},{"type":"event","name":"SupplyManagerChanged","inputs":[{"type":"address","name":"oldManager","internalType":"address","indexed":true},{"type":"address","name":"newManager","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"TokenMetaUpdated","inputs":[{"type":"string","name":"name","internalType":"string","indexed":true},{"type":"string","name":"symbol","internalType":"string","indexed":true}],"anonymous":false},{"type":"event","name":"Transfer","inputs":[{"type":"address","name":"from","internalType":"address","indexed":true},{"type":"address","name":"to","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"DOMAIN_TYPEHASH","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"PERMIT_TYPEHASH","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"RECEIVE_WITH_AUTHORIZATION_TYPEHASH","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"TRANSFER_WITH_AUTHORIZATION_TYPEHASH","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"VERSION_HASH","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"allowance","inputs":[{"type":"address","name":"account","internalType":"address"},{"type":"address","name":"spender","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"approve","inputs":[{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"authorizationState","inputs":[{"type":"address","name":"","internalType":"address"},{"type":"bytes32","name":"","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"balanceOf","inputs":[{"type":"address","name":"account","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"burn","inputs":[{"type":"address","name":"src","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"decimals","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"decreaseAllowance","inputs":[{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"subtractedValue","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"getDomainSeparator","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"increaseAllowance","inputs":[{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"addedValue","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"metadataManager","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"mint","inputs":[{"type":"address","name":"dst","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint16","name":"","internalType":"uint16"}],"name":"mintCap","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"name","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"nonces","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"permit","inputs":[{"type":"address","name":"owner","internalType":"address"},{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"receiveWithAuthorization","inputs":[{"type":"address","name":"from","internalType":"address"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"validAfter","internalType":"uint256"},{"type":"uint256","name":"validBefore","internalType":"uint256"},{"type":"bytes32","name":"nonce","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":[{"type":"bool","name":"","internalType":"bool"}],"name":"setMetadataManager","inputs":[{"type":"address","name":"newMetadataManager","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"setMintCap","inputs":[{"type":"uint16","name":"newCap","internalType":"uint16"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"setSupplyChangeWaitingPeriod","inputs":[{"type":"uint32","name":"period","internalType":"uint32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"setSupplyManager","inputs":[{"type":"address","name":"newSupplyManager","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"supplyChangeAllowedAfter","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint32","name":"","internalType":"uint32"}],"name":"supplyChangeWaitingPeriod","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint32","name":"","internalType":"uint32"}],"name":"supplyChangeWaitingPeriodMinimum","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"supplyManager","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"symbol","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalSupply","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transfer","inputs":[{"type":"address","name":"dst","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transferFrom","inputs":[{"type":"address","name":"src","internalType":"address"},{"type":"address","name":"dst","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferWithAuthorization","inputs":[{"type":"address","name":"from","internalType":"address"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"validAfter","internalType":"uint256"},{"type":"uint256","name":"validBefore","internalType":"uint256"},{"type":"bytes32","name":"nonce","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":[{"type":"bool","name":"","internalType":"bool"}],"name":"updateTokenMetadata","inputs":[{"type":"string","name":"tokenName","internalType":"string"},{"type":"string","name":"tokenSymbol","internalType":"string"}]}]
Contract Creation Code
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