ERC-20
Protocol
CoinGecko
Add Token to MetaMask (Web3)Overview
Max Total Supply
873,531,456.544624579337698504 GEIST
Holders
8,141 ( -0.012%)
Total Transfers
-
Market
Price
$0.00 @ 0.000000 FTM
Onchain Market Cap
$3,018,356.92
Circulating Supply Market Cap
$2,950,049.00
Other Info
Token Contract (WITH 18 Decimals)
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x7086695d...332814fE7 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
GeistToken
Compiler Version
v0.7.6+commit.7338295f
Contract Source Code (Solidity)
/**
*Submitted for verification at ftmscan.com on 2021-09-29
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
// Part: IERC20
/**
* @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);
}
// Part: SafeMath
/**
* @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 subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, 'SafeMath: subtraction overflow');
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
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 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;
}
}
// File: GeistToken.sol
contract GeistToken is IERC20 {
using SafeMath for uint256;
string public constant symbol = "GEIST";
string public constant name = "Geist.Finance Protocol Token";
uint256 public constant decimals = 18;
uint256 public override totalSupply;
uint256 public immutable maxTotalSupply;
address public minter;
mapping(address => uint256) public override balanceOf;
mapping(address => mapping(address => uint256)) public override allowance;
constructor(uint256 _maxTotalSupply) {
maxTotalSupply = _maxTotalSupply;
emit Transfer(address(0), msg.sender, 0);
}
function setMinter(address _minter) external returns (bool) {
require(minter == address(0));
minter = _minter;
return true;
}
function approve(address _spender, uint256 _value) external override returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/** shared logic for transfer and transferFrom */
function _transfer(address _from, address _to, uint256 _value) internal {
require(balanceOf[_from] >= _value, "Insufficient balance");
balanceOf[_from] = balanceOf[_from].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
emit Transfer(_from, _to, _value);
}
/**
@notice Transfer tokens to a specified address
@param _to The address to transfer to
@param _value The amount to be transferred
@return Success boolean
*/
function transfer(address _to, uint256 _value) public override returns (bool) {
_transfer(msg.sender, _to, _value);
return true;
}
/**
@notice Transfer tokens from one address to another
@param _from The address which you want to send tokens from
@param _to The address which you want to transfer to
@param _value The amount of tokens to be transferred
@return Success boolean
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
override
returns (bool)
{
uint256 allowed = allowance[_from][msg.sender];
require(allowed >= _value, "Insufficient allowance");
if (allowed != uint(-1)) {
allowance[_from][msg.sender] = allowed.sub(_value);
}
_transfer(_from, _to, _value);
return true;
}
function mint(address _to, uint256 _value) external returns (bool) {
require(msg.sender == minter);
balanceOf[_to] = balanceOf[_to].add(_value);
totalSupply = totalSupply.add(_value);
require(maxTotalSupply >= totalSupply);
emit Transfer(address(0), _to, _value);
return true;
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Deployed Bytecode
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