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pragma solidity ^0.4.18;
/**
* ERC 20 token
* https://github.com/ethereum/EIPs/issues/20
*/
interface Token {
/// @return total amount of tokens
/// function totalSupply() public constant returns (uint256 supply);
/// do not declare totalSupply() here, see https://github.com/OpenZeppelin/zeppelin-solidity/issues/434
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) public constant returns (uint256 balance);
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) public returns (bool success);
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) public returns (bool success);
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
/** @title Publica Pebbles (PBL contract) **/
contract Pebbles is Token {
string public constant name = "Pebbles";
string public constant symbol = "PBL";
uint8 public constant decimals = 18;
uint256 public constant totalSupply = 33787150 * 10**18;
uint public launched = 0; // Time of locking distribution and retiring founder; 0 means not launched
address public founder = 0xa99Ab2FcC5DdFd5c1Cbe6C3D760420D2dDb63d99; // Founder's address
address public team = 0xe32A4bb42AcE38DcaAa7f23aD94c41dE0334A500; // Team's address
address public treasury = 0xc46e5D11754129790B336d62ee90b12479af7cB5; // Treasury address
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
uint256 public balanceTeam = 0; // Actual Team's frozen balance = balanceTeam - withdrawnTeam
uint256 public withdrawnTeam = 0;
uint256 public balanceTreasury = 0; // Treasury's frozen balance
function Pebbles() public {
balances[founder] = totalSupply;
}
function transfer(address _to, uint256 _value) public returns (bool success) {
if (balances[msg.sender] < _value) {
return false;
}
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
if (balances[_from] < _value || allowed[_from][msg.sender] < _value) {
return false;
}
allowed[_from][msg.sender] -= _value;
balances[_from] -= _value;
balances[_to] += _value;
Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**@dev Launch and retire the founder */
function launch() public {
require(msg.sender == founder);
launched = block.timestamp;
founder = 0x0;
}
/**@dev Give _value PBLs to balances[team] during 5 years (20% per year) after launch
* @param _value Number of PBLs
*/
function reserveTeam(uint256 _value) public {
require(msg.sender == founder);
require(balances[founder] >= _value);
balances[founder] -= _value;
balanceTeam += _value;
}
/**@dev Give _value PBLs to balances[treasury] after 3 months after launch
* @param _value Number of PBLs
*/
function reserveTreasury(uint256 _value) public {
require(msg.sender == founder);
require(balances[founder] >= _value);
balances[founder] -= _value;
balanceTreasury += _value;
}
/**@dev Unfreeze some tokens for team and treasury, if the time has come
*/
function withdrawDeferred() public {
require(msg.sender == team);
require(launched != 0);
uint yearsSinceLaunch = (block.timestamp - launched) / 1 years;
if (yearsSinceLaunch < 5) {
uint256 teamTokensAvailable = balanceTeam / 5 * yearsSinceLaunch;
balances[team] += teamTokensAvailable - withdrawnTeam;
withdrawnTeam = teamTokensAvailable;
} else {
balances[team] += balanceTeam - withdrawnTeam;
balanceTeam = 0;
withdrawnTeam = 0;
team = 0x0;
}
if (block.timestamp - launched >= 90 days) {
balances[treasury] += balanceTreasury;
balanceTreasury = 0;
treasury = 0x0;
}
}
function() public { // no direct purchases
revert();
}
}