-
Notifications
You must be signed in to change notification settings - Fork 0
/
Crowdsale.sol
98 lines (72 loc) · 2.39 KB
/
Crowdsale.sol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
pragma solidity 0.4.18;
import './SerenityToken.sol';
import './SafeMath.sol';
contract Crowdsale {
using SafeMath for uint256;
SerenityToken public token;
mapping(uint256 => uint8) internal icoWeeksDiscounts;
bool public isICOStarted = false;
uint256 public icoStartTime;
uint256 public icoEndTime;
address public wallet = 0x47c8F28e6056374aBA3DF0854306c2556B104601;
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
modifier validAddress(address _address) {
require(_address != 0x0);
_;
}
function Crowdsale() public {
token = createTokenContract();
initDiscounts();
}
function initDiscounts() internal {
icoWeeksDiscounts[0] = 40;
icoWeeksDiscounts[1] = 35;
icoWeeksDiscounts[2] = 30;
icoWeeksDiscounts[3] = 25;
icoWeeksDiscounts[4] = 20;
icoWeeksDiscounts[5] = 10;
}
function createTokenContract() internal returns (SerenityToken) {
return new SerenityToken();
}
function () public payable {
buyTokens(msg.sender);
}
function getDiscount() internal view returns (uint8) {
require(isICOStarted == true);
require(icoStartTime < now);
require(icoEndTime > now);
uint256 weeksPassed = now.sub(icoStartTime).div(7 days);
return icoWeeksDiscounts[weeksPassed];
}
function buyTokens(address beneficiary) public validAddress(beneficiary) payable {
require(isICOStarted);
require(validPurchase());
uint8 discountPercents = getDiscount();
uint256 tokens = msg.value.mul(100).div(100 - discountPercents).mul(10000);
require(tokens >= 100 ether);
token.autoTransfer(beneficiary, tokens);
TokenPurchase(msg.sender, beneficiary, msg.value, tokens);
forwardFunds();
}
function activateICO(uint256 _icoEndTime) public {
require(msg.sender == wallet);
require(_icoEndTime >= now);
require(isICOStarted == false);
isICOStarted = true;
icoEndTime = _icoEndTime;
icoStartTime = now;
}
function forwardFunds() internal {
wallet.transfer(msg.value);
}
function finalize() public {
require(msg.sender == wallet);
token.finalize();
}
function validPurchase() internal view returns (bool) {
bool withinICOPeriod = isICOStarted && now >= icoStartTime && now <= icoEndTime;
bool nonZeroPurchase = msg.value != 0;
return withinICOPeriod && nonZeroPurchase;
}
}