/**
Telegram: https://t.me/blendportal
Twitter: https://twitter.com/blend_protocol
Website: https://www.blendprotocol.io/
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
contract BLEND {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
string private constant _name = "Blend Protocol";
string private constant _symbol = "BLEND";
uint8 private constant _decimals = 18;
uint256 private constant _totalSupply = 1_000_000_000 * 10**18;
bool public tradingActive = false;
mapping(address => bool) private _excludedFromTradingLock;
address private _owner;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
modifier onlyOwner() {
require(msg.sender == _owner, "Not the contract owner");
_;
}
constructor() {
_owner = msg.sender;
_balances[msg.sender] = _totalSupply;
_excludedFromTradingLock[msg.sender] = true;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function excludeFromTradingLock(address account) external onlyOwner {
_excludedFromTradingLock[account] = true;
}
function enableTrading() external onlyOwner {
tradingActive = true;
}
function name() external view virtual returns (string memory) {
return _name;
}
function symbol() external view virtual returns (string memory) {
return _symbol;
}
function decimals() external view virtual returns (uint8) {
return _decimals;
}
function totalSupply() external view virtual returns (uint256) {
return _totalSupply;
}
function balanceOf(address account)
external
view
virtual
returns (uint256)
{
return _balances[account];
}
function transfer(address to, uint256 amount)
external
virtual
returns (bool)
{
address owner = msg.sender;
require(owner != to, "ERC20: transfer to address cannot be owner");
_transfer(owner, to, amount);
return true;
}
function allowance(address owner, address spender)
public
view
virtual
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
external
virtual
returns (bool)
{
address owner = msg.sender;
_approve(owner, spender, amount);
return true;
}
function transferFrom(
address from,
address to,
uint256 amount
) external virtual returns (bool) {
address spender = msg.sender;
require(
spender != from,
"ERC20: transferFrom spender can not be the from"
);
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
external
virtual
returns (bool)
{
address owner = msg.sender;
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
external
virtual
returns (bool)
{
address owner = msg.sender;
uint256 currentAllowance = allowance(owner, spender);
require(
currentAllowance >= subtractedValue,
"ERC20: decreased allowance below zero"
);
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "ERC20: transfer amount must be greater than zero");
require(tradingActive || _excludedFromTradingLock[from] || _excludedFromTradingLock[to], "Trading is not active.");
uint256 fromBalance = _balances[from];
require(
fromBalance >= amount,
"ERC20: transfer amount exceeds balance"
);
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(
currentAllowance >= amount,
"ERC20: insufficient allowance"
);
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
}
{
"compilationTarget": {
"BLEND.sol": "BLEND"
},
"evmVersion": "paris",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
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