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HODL your tokens AND your ETH!
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| pragma solidity ^0.4.19; | |
| // Copyright (c) 2017 Christian Calderon | |
| // | |
| // Permission is hereby granted, free of charge, to any person obtaining a copy | |
| // of this software and associated documentation files (the "Software"), to deal | |
| // in the Software without restriction, including without limitation the rights | |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| // copies of the Software, and to permit persons to whom the Software is | |
| // furnished to do so, subject to the following conditions: | |
| // | |
| // The above copyright notice and this permission notice shall be included in all | |
| // copies or substantial portions of the Software. | |
| // | |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| // SOFTWARE. | |
| interface ERC20 { | |
| function transferFrom(address from, address to, uint tokens) public returns (bool success); | |
| function transfer(address to, uint tokens) public returns (bool success); | |
| } | |
| contract HODL{ | |
| struct Deposit { | |
| address token; | |
| uint balance; | |
| uint hodl_end; | |
| } | |
| address constant ETH = address(1); | |
| mapping(address => Deposit[]) deposits; | |
| event Withdrawal(address indexed token, uint indexed amount); | |
| function myDeposits() public view returns (Deposit[]) { | |
| // This function is only useful for UIs. | |
| Deposit[] storage ds = deposits[msg.sender]; | |
| uint depositCount = 0; | |
| uint length = ds.length; | |
| uint i = 0; | |
| while(i < length){ | |
| if(ds[i].token != 0){ | |
| depositCount += 1; | |
| } | |
| i += 1; | |
| } | |
| Deposit[] memory result = new Deposit[](depositCount); | |
| i = 0; | |
| uint j = 0; | |
| while(i < length){ | |
| if(ds[i].token != 0){ | |
| result[j] = ds[i]; | |
| j += 1; | |
| } | |
| i += 1; | |
| } | |
| return result; | |
| } | |
| function hodl(address withdrawer, address token, uint amount, uint hodl_time) public payable returns (bool) { | |
| require(uint(withdrawer) >> 160 == 0); | |
| require(uint(token) >> 160 == 0); | |
| require(amount > 0); | |
| require(hodl_time > 0); | |
| uint hodl_end = block.timestamp + hodl_time; | |
| assert(hodl_end > block.timestamp); | |
| if(token != ETH){ | |
| require(msg.value == 0); | |
| require(ERC20(token).transferFrom(msg.sender, address(this), amount)); | |
| } else { | |
| require(msg.value == amount); | |
| } | |
| Deposit[] storage ds = deposits[withdrawer]; | |
| uint i = 0; | |
| while(i < ds.length){ | |
| if(ds[i].token == address(0)){ | |
| ds[i] = Deposit(token, amount, hodl_end); | |
| break; | |
| } | |
| i += 1; | |
| } | |
| if(i == ds.length){ | |
| ds.push(Deposit(token, amount, hodl_end)); | |
| } | |
| return true; | |
| } | |
| function withdraw() public { | |
| Deposit[] storage ds = deposits[msg.sender]; | |
| uint length = ds.length; | |
| address[] memory tokens = new address[](length); | |
| uint[] memory amounts = new uint[](length); | |
| uint tokens_found = 0; | |
| uint i = 0; | |
| uint time = block.timestamp; | |
| while(i < length){ | |
| if(ds[i].hodl_end > time){ | |
| i += 1; | |
| continue; | |
| } | |
| uint j = 0; | |
| while(j < tokens_found){ | |
| if(tokens[j] == ds[i].token){ | |
| break; | |
| } | |
| j += 1; | |
| } | |
| if(j == tokens_found){ | |
| tokens_found += 1; | |
| tokens[j] = ds[i].token; | |
| } | |
| amounts[j] += ds[i].balance; | |
| delete ds[i].token; | |
| delete ds[i].balance; | |
| delete ds[i].hodl_end; | |
| i += 1; | |
| } | |
| i = 0; | |
| while(i < tokens_found){ | |
| if(tokens[i] != ETH){ | |
| ERC20(tokens[i]).transfer(msg.sender, amounts[i]); | |
| } else { | |
| msg.sender.transfer(amounts[i]); | |
| } | |
| Withdrawal(tokens[i], amounts[i]); | |
| i += 1; | |
| } | |
| i = length - 1; | |
| uint new_length = length; | |
| while(i > 0){ | |
| if(ds[i].token != 0){ | |
| break; | |
| } | |
| new_length -= 1; | |
| i -= 1; | |
| } | |
| if(new_length != length){ | |
| ds.length = new_length; | |
| } | |
| } | |
| } |
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