accept transfers

[brostiko]

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[brostiko]

pragma solidity ^0.5.8;

interface ITRC20 { function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); }

library SafeMath {

function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
    uint256 c = a + b;
    require(c >= a, errorMessage);

    return c;
}

function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
    require(b <= a, errorMessage);
    uint256 c = a - b;

    return c;
}

}

contract BTT is ITRC20 { using SafeMath for uint256; string constant public name = "BitTorrent"; string constant public symbol = "BTT"; uint8 constant public decimals = 18;

uint256 private totalSupply_;
mapping(address => uint256) private  balanceOf_;
mapping(address => mapping(address => uint256)) private  allowance_;

constructor(address fund) public {
    totalSupply_ = 9900 * 1e8 * 1e18 * 1e3;
    balanceOf_[fund] = totalSupply_;
    emit Transfer(address(0x00), fund, totalSupply_);
}

function totalSupply() public view returns (uint256) {
    return totalSupply_;
}

function balanceOf(address guy) public view returns (uint256){
    return balanceOf_[guy];
}

function allowance(address src, address guy) public view returns (uint256){
    return allowance_[src][guy];
}

function approve(address guy, uint256 sad) public returns (bool) {
    allowance_[msg.sender][guy] = sad;
    emit Approval(msg.sender, guy, sad);
    return true;
}

function transfer(address dst, uint256 sad) public returns (bool) {
    return transferFrom(msg.sender, dst, sad);
}

function transferFrom(address src, address dst, uint256 sad)
public returns (bool)
{
    require(balanceOf_[src] >= sad, "src balance not enough");

    if (src != msg.sender && allowance_[src][msg.sender] != uint256(-1)) {
        require(allowance_[src][msg.sender] >= sad, "src allowance is not enough");
        allowance_[src][msg.sender] = allowance_[src][msg.sender].sub(sad, "allowance subtraction overflow") ;
    }
    balanceOf_[src] = balanceOf_[src].sub(sad, "from balance subtraction overflow");
    balanceOf_[dst] = balanceOf_[dst].add(sad, "to balance addition overflow") ;

    emit Transfer(src, dst, sad);
    return true;
}

function increaseAllowance(address guy, uint256 addedValue) public returns (bool) {
    require(guy != address(0));

    allowance_[msg.sender][guy] = allowance_[msg.sender][guy].add(addedValue, "allowance addition overflow") ;
    emit Approval(msg.sender, guy, allowance_[msg.sender][guy]);
    return true;
}

function decreaseAllowance(address guy, uint256 subtractedValue) public returns (bool) {
    require(guy != address(0));

    allowance_[msg.sender][guy] = allowance_[msg.sender][guy].sub(subtractedValue, "allowance subtraction overflow") ;
    emit Approval(msg.sender, guy, allowance_[msg.sender][guy]);
    return true;
}

}