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pragma solidity 0.4.24;
contract AbcdEfg {
mapping (uint256 => Mark) public marks;
string public constant name = "abcdEfg";
string public constant symbol = "a2g";
uint8 public constant decimals = 0;
string public constant memo = "Fit in the words here!Fit in the words here!Fit in the words here!Fit in the words here!";
mapping (address => uint256) private balances;
mapping (address => uint256) private marked;
uint256 private totalSupply_ = 1000;
uint256 private markId = 0;
event Transfer(
address indexed from,
address indexed to,
uint256 value
);
struct Mark {
address author;
bytes content;
}
constructor() public {
balances[msg.sender] = totalSupply_;
}
function () public {
mark();
}
function mark() internal {
require(1 + marked[msg.sender] <= balances[msg.sender]);
markId ++;
marked[msg.sender] ++;
Mark memory temp;
temp.author = msg.sender;
temp.content = msg.data;
marks[markId] = temp;
}
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(_value + marked[msg.sender] <= balances[msg.sender]);
require(_to != address(0));
balances[msg.sender] = balances[msg.sender] - _value;
balances[_to] = balances[_to] + _value;
emit Transfer(msg.sender, _to, _value);
return true;
}
} |