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pragma solidity ^0.8.0;
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interface IERC20 {
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function totalSupply() external view returns (uint256);
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function balanceOf(address account) external view returns (uint256);
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function allowance(address owner, address spender) external view returns (uint256);
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function transfer(address recipient, uint256 amount) external returns (bool);
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function approve(address spender, uint256 amount) external returns (bool);
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function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
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event Transfer(address indexed from, address indexed to, uint256 value);
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event Approval(address indexed owner, address indexed spender, uint256 value);
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}
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contract Bandai is IERC20 {
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using SafeMath for uint256;
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string public constant name = "Bandai Namco Europe";
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string public constant symbol = "BANDAI";
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uint8 public constant decimals = 18;
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mapping(address => uint256) balances;
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mapping(address => mapping (address => uint256)) allowed;
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uint256 private totalSupply_ = 100000000*10**uint256(decimals);
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constructor() public {
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balances[msg.sender] = totalSupply_;
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}
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function totalSupply() public override view returns (uint256) {
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return totalSupply_;
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}
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function balanceOf(address tokenOwner) public override view returns (uint256) {
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return balances[tokenOwner];
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}
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function transfer(address receiver, uint256 numTokens) public override returns (bool) {
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require(numTokens <= balances[msg.sender]);
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balances[msg.sender] = balances[msg.sender].sub(numTokens);
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balances[receiver] = balances[receiver].add(numTokens);
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emit Transfer(msg.sender, receiver, numTokens);
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return true;
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}
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function approve(address delegate, uint256 numTokens) public override returns (bool) {
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allowed[msg.sender][delegate] = numTokens;
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emit Approval(msg.sender, delegate, numTokens);
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return true;
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}
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function allowance(address owner, address delegate) public override view returns (uint) {
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return allowed[owner][delegate];
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}
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function transferFrom(address owner, address buyer, uint256 numTokens) public override returns (bool) {
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require(numTokens <= balances[owner]);
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require(numTokens <= allowed[owner][msg.sender]);
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balances[owner] = balances[owner].sub(numTokens);
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allowed[owner][msg.sender] = allowed[owner][msg.sender].sub(numTokens);
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balances[buyer] = balances[buyer].add(numTokens);
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emit Transfer(owner, buyer, numTokens);
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return true;
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}
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}
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library SafeMath {
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function sub(uint256 a, uint256 b) internal pure returns (uint256) {
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assert(b <= a);
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return a - b;
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}
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function add(uint256 a, uint256 b) internal pure returns (uint256) {
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uint256 c = a + b;
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assert(c >= a);
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return c;
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}
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} |