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+/**
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+ *Submitted for verification at Etherscan.io on 2017-12-12
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+*/
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+
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+// Copyright (C) 2015, 2016, 2017 Dapphub
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+
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+// This program is free software: you can redistribute it and/or modify
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+// it under the terms of the GNU General Public License as published by
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+// the Free Software Foundation, either version 3 of the License, or
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+// (at your option) any later version.
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+
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+// This program is distributed in the hope that it will be useful,
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+// but WITHOUT ANY WARRANTY; without even the implied warranty of
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+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+// GNU General Public License for more details.
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+
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+// You should have received a copy of the GNU General Public License
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+// along with this program. If not, see <http://www.gnu.org/licenses/>.
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+
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+pragma solidity ^0.4.18;
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+
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+contract WETH9 {
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+ string public name = "Wrapped Ether";
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+ string public symbol = "WETH";
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+ uint8 public decimals = 18;
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+
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+ event Approval(address indexed src, address indexed guy, uint wad);
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+ event Transfer(address indexed src, address indexed dst, uint wad);
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+ event Deposit(address indexed dst, uint wad);
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+ event Withdrawal(address indexed src, uint wad);
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+
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+ mapping (address => uint) public balanceOf;
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+ mapping (address => mapping (address => uint)) public allowance;
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+
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+ function() public payable {
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+ deposit();
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+ }
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+ function deposit() public payable {
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+ balanceOf[msg.sender] += msg.value;
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+ Deposit(msg.sender, msg.value);
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+ }
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+ function withdraw(uint wad) public {
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+ require(balanceOf[msg.sender] >= wad);
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+ balanceOf[msg.sender] -= wad;
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+ msg.sender.transfer(wad);
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+ Withdrawal(msg.sender, wad);
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+ }
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+
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+ function totalSupply() public view returns (uint) {
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+ return this.balance;
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+ }
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+
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+ function approve(address guy, uint wad) public returns (bool) {
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+ allowance[msg.sender][guy] = wad;
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+ Approval(msg.sender, guy, wad);
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+ return true;
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+ }
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+
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+ function transfer(address dst, uint wad) public returns (bool) {
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+ return transferFrom(msg.sender, dst, wad);
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+ }
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+
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+ function transferFrom(address src, address dst, uint wad)
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+ public
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+ returns (bool)
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+ {
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+ require(balanceOf[src] >= wad);
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+
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+ if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
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+ require(allowance[src][msg.sender] >= wad);
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+ allowance[src][msg.sender] -= wad;
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+ }
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+
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+ balanceOf[src] -= wad;
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+ balanceOf[dst] += wad;
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+
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+ Transfer(src, dst, wad);
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+
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+ return true;
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+ }
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+}
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+
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+
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+/*
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+ GNU GENERAL PUBLIC LICENSE
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+ Version 3, 29 June 2007
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+
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+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+ Everyone is permitted to copy and distribute verbatim copies
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+ of this license document, but changing it is not allowed.
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+
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+ Preamble
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+
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+ The GNU General Public License is a free, copyleft license for
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+software and other kinds of works.
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+
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+ The licenses for most software and other practical works are designed
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+to take away your freedom to share and change the works. By contrast,
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+the GNU General Public License is intended to guarantee your freedom to
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+share and change all versions of a program--to make sure it remains free
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+software for all its users. We, the Free Software Foundation, use the
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+GNU General Public License for most of our software; it applies also to
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+any other work released this way by its authors. You can apply it to
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+your programs, too.
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+11 of the WIPO copyright treaty adopted on 20 December 1996, or
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+
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+doubtful cases shall be resolved in favor of coverage. For a particular
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+product received by a particular user, "normally used" refers to a
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+typical or common use of that class of product, regardless of the status
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+of the particular user or of the way in which the particular user
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+actually uses, or expects or is expected to use, the product. A product
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|
+is a consumer product regardless of whether the product has substantial
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|
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+commercial, industrial or non-consumer uses, unless such uses represent
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|
|
+the only significant mode of use of the product.
|
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|
+
|
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|
+ "Installation Information" for a User Product means any methods,
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+procedures, authorization keys, or other information required to install
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+and execute modified versions of a covered work in that User Product from
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+a modified version of its Corresponding Source. The information must
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|
|
+suffice to ensure that the continued functioning of the modified object
|
|
|
+code is in no case prevented or interfered with solely because
|
|
|
+modification has been made.
|
|
|
+
|
|
|
+ If you convey an object code work under this section in, or with, or
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|
|
+specifically for use in, a User Product, and the conveying occurs as
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+part of a transaction in which the right of possession and use of the
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+User Product is transferred to the recipient in perpetuity or for a
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+fixed term (regardless of how the transaction is characterized), the
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+Corresponding Source conveyed under this section must be accompanied
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|
|
+by the Installation Information. But this requirement does not apply
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|
|
+if neither you nor any third party retains the ability to install
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|
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+modified object code on the User Product (for example, the work has
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+been installed in ROM).
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+
|
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|
+ The requirement to provide Installation Information does not include a
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+requirement to continue to provide support service, warranty, or updates
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|
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+for a work that has been modified or installed by the recipient, or for
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|
+the User Product in which it has been modified or installed. Access to a
|
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|
+network may be denied when the modification itself materially and
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|
|
+adversely affects the operation of the network or violates the rules and
|
|
|
+protocols for communication across the network.
|
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|
+
|
|
|
+ Corresponding Source conveyed, and Installation Information provided,
|
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+in accord with this section must be in a format that is publicly
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|
|
+documented (and with an implementation available to the public in
|
|
|
+source code form), and must require no special password or key for
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+unpacking, reading or copying.
|
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|
+
|
|
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+ 7. Additional Terms.
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+
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+ "Additional permissions" are terms that supplement the terms of this
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+License by making exceptions from one or more of its conditions.
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+Additional permissions that are applicable to the entire Program shall
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+be treated as though they were included in this License, to the extent
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|
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+that they are valid under applicable law. If additional permissions
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+apply only to part of the Program, that part may be used separately
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+under those permissions, but the entire Program remains governed by
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|
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+this License without regard to the additional permissions.
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|
+
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+ When you convey a copy of a covered work, you may at your option
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+remove any additional permissions from that copy, or from any part of
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+it. (Additional permissions may be written to require their own
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+removal in certain cases when you modify the work.) You may place
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+additional permissions on material, added by you to a covered work,
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+for which you have or can give appropriate copyright permission.
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+
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+ Notwithstanding any other provision of this License, for material you
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+add to a covered work, you may (if authorized by the copyright holders of
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+that material) supplement the terms of this License with terms:
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+
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+ a) Disclaiming warranty or limiting liability differently from the
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+ terms of sections 15 and 16 of this License; or
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+
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+ b) Requiring preservation of specified reasonable legal notices or
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+ author attributions in that material or in the Appropriate Legal
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+ Notices displayed by works containing it; or
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+
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+ c) Prohibiting misrepresentation of the origin of that material, or
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+ requiring that modified versions of such material be marked in
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+ reasonable ways as different from the original version; or
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+
|
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+ d) Limiting the use for publicity purposes of names of licensors or
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+ authors of the material; or
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+
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+ e) Declining to grant rights under trademark law for use of some
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+ trade names, trademarks, or service marks; or
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+
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+ f) Requiring indemnification of licensors and authors of that
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+ material by anyone who conveys the material (or modified versions of
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+ it) with contractual assumptions of liability to the recipient, for
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+ any liability that these contractual assumptions directly impose on
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+ those licensors and authors.
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+
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+ All other non-permissive additional terms are considered "further
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+restrictions" within the meaning of section 10. If the Program as you
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|
+received it, or any part of it, contains a notice stating that it is
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+governed by this License along with a term that is a further
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+restriction, you may remove that term. If a license document contains
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+a further restriction but permits relicensing or conveying under this
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+License, you may add to a covered work material governed by the terms
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+of that license document, provided that the further restriction does
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+not survive such relicensing or conveying.
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+
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+ If you add terms to a covered work in accord with this section, you
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+must place, in the relevant source files, a statement of the
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|
|
+additional terms that apply to those files, or a notice indicating
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|
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+where to find the applicable terms.
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+
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|
+ Additional terms, permissive or non-permissive, may be stated in the
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|
|
+form of a separately written license, or stated as exceptions;
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|
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+the above requirements apply either way.
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|
|
+
|
|
|
+ 8. Termination.
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+
|
|
|
+ You may not propagate or modify a covered work except as expressly
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|
+provided under this License. Any attempt otherwise to propagate or
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|
|
+modify it is void, and will automatically terminate your rights under
|
|
|
+this License (including any patent licenses granted under the third
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|
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+paragraph of section 11).
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|
+
|
|
|
+ However, if you cease all violation of this License, then your
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|
+license from a particular copyright holder is reinstated (a)
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|
|
+provisionally, unless and until the copyright holder explicitly and
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|
|
+finally terminates your license, and (b) permanently, if the copyright
|
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|
+holder fails to notify you of the violation by some reasonable means
|
|
|
+prior to 60 days after the cessation.
|
|
|
+
|
|
|
+ Moreover, your license from a particular copyright holder is
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|
|
+reinstated permanently if the copyright holder notifies you of the
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|
|
+violation by some reasonable means, this is the first time you have
|
|
|
+received notice of violation of this License (for any work) from that
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|
|
+copyright holder, and you cure the violation prior to 30 days after
|
|
|
+your receipt of the notice.
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|
|
+
|
|
|
+ Termination of your rights under this section does not terminate the
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|
+licenses of parties who have received copies or rights from you under
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|
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+this License. If your rights have been terminated and not permanently
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|
|
+reinstated, you do not qualify to receive new licenses for the same
|
|
|
+material under section 10.
|
|
|
+
|
|
|
+ 9. Acceptance Not Required for Having Copies.
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|
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+
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|
|
+ You are not required to accept this License in order to receive or
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|
+run a copy of the Program. Ancillary propagation of a covered work
|
|
|
+occurring solely as a consequence of using peer-to-peer transmission
|
|
|
+to receive a copy likewise does not require acceptance. However,
|
|
|
+nothing other than this License grants you permission to propagate or
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|
|
+modify any covered work. These actions infringe copyright if you do
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|
|
+not accept this License. Therefore, by modifying or propagating a
|
|
|
+covered work, you indicate your acceptance of this License to do so.
|
|
|
+
|
|
|
+ 10. Automatic Licensing of Downstream Recipients.
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|
+
|
|
|
+ Each time you convey a covered work, the recipient automatically
|
|
|
+receives a license from the original licensors, to run, modify and
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|
+propagate that work, subject to this License. You are not responsible
|
|
|
+for enforcing compliance by third parties with this License.
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|
|
+
|
|
|
+ An "entity transaction" is a transaction transferring control of an
|
|
|
+organization, or substantially all assets of one, or subdividing an
|
|
|
+organization, or merging organizations. If propagation of a covered
|
|
|
+work results from an entity transaction, each party to that
|
|
|
+transaction who receives a copy of the work also receives whatever
|
|
|
+licenses to the work the party's predecessor in interest had or could
|
|
|
+give under the previous paragraph, plus a right to possession of the
|
|
|
+Corresponding Source of the work from the predecessor in interest, if
|
|
|
+the predecessor has it or can get it with reasonable efforts.
|
|
|
+
|
|
|
+ You may not impose any further restrictions on the exercise of the
|
|
|
+rights granted or affirmed under this License. For example, you may
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|
|
+not impose a license fee, royalty, or other charge for exercise of
|
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|
+rights granted under this License, and you may not initiate litigation
|
|
|
+(including a cross-claim or counterclaim in a lawsuit) alleging that
|
|
|
+any patent claim is infringed by making, using, selling, offering for
|
|
|
+sale, or importing the Program or any portion of it.
|
|
|
+
|
|
|
+ 11. Patents.
|
|
|
+
|
|
|
+ A "contributor" is a copyright holder who authorizes use under this
|
|
|
+License of the Program or a work on which the Program is based. The
|
|
|
+work thus licensed is called the contributor's "contributor version".
|
|
|
+
|
|
|
+ A contributor's "essential patent claims" are all patent claims
|
|
|
+owned or controlled by the contributor, whether already acquired or
|
|
|
+hereafter acquired, that would be infringed by some manner, permitted
|
|
|
+by this License, of making, using, or selling its contributor version,
|
|
|
+but do not include claims that would be infringed only as a
|
|
|
+consequence of further modification of the contributor version. For
|
|
|
+purposes of this definition, "control" includes the right to grant
|
|
|
+patent sublicenses in a manner consistent with the requirements of
|
|
|
+this License.
|
|
|
+
|
|
|
+ Each contributor grants you a non-exclusive, worldwide, royalty-free
|
|
|
+patent license under the contributor's essential patent claims, to
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|
|
+make, use, sell, offer for sale, import and otherwise run, modify and
|
|
|
+propagate the contents of its contributor version.
|
|
|
+
|
|
|
+ In the following three paragraphs, a "patent license" is any express
|
|
|
+agreement or commitment, however denominated, not to enforce a patent
|
|
|
+(such as an express permission to practice a patent or covenant not to
|
|
|
+sue for patent infringement). To "grant" such a patent license to a
|
|
|
+party means to make such an agreement or commitment not to enforce a
|
|
|
+patent against the party.
|
|
|
+
|
|
|
+ If you convey a covered work, knowingly relying on a patent license,
|
|
|
+and the Corresponding Source of the work is not available for anyone
|
|
|
+to copy, free of charge and under the terms of this License, through a
|
|
|
+publicly available network server or other readily accessible means,
|
|
|
+then you must either (1) cause the Corresponding Source to be so
|
|
|
+available, or (2) arrange to deprive yourself of the benefit of the
|
|
|
+patent license for this particular work, or (3) arrange, in a manner
|
|
|
+consistent with the requirements of this License, to extend the patent
|
|
|
+license to downstream recipients. "Knowingly relying" means you have
|
|
|
+actual knowledge that, but for the patent license, your conveying the
|
|
|
+covered work in a country, or your recipient's use of the covered work
|
|
|
+in a country, would infringe one or more identifiable patents in that
|
|
|
+country that you have reason to believe are valid.
|
|
|
+
|
|
|
+ If, pursuant to or in connection with a single transaction or
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|
|
+arrangement, you convey, or propagate by procuring conveyance of, a
|
|
|
+covered work, and grant a patent license to some of the parties
|
|
|
+receiving the covered work authorizing them to use, propagate, modify
|
|
|
+or convey a specific copy of the covered work, then the patent license
|
|
|
+you grant is automatically extended to all recipients of the covered
|
|
|
+work and works based on it.
|
|
|
+
|
|
|
+ A patent license is "discriminatory" if it does not include within
|
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|
+the scope of its coverage, prohibits the exercise of, or is
|
|
|
+conditioned on the non-exercise of one or more of the rights that are
|
|
|
+specifically granted under this License. You may not convey a covered
|
|
|
+work if you are a party to an arrangement with a third party that is
|
|
|
+in the business of distributing software, under which you make payment
|
|
|
+to the third party based on the extent of your activity of conveying
|
|
|
+the work, and under which the third party grants, to any of the
|
|
|
+parties who would receive the covered work from you, a discriminatory
|
|
|
+patent license (a) in connection with copies of the covered work
|
|
|
+conveyed by you (or copies made from those copies), or (b) primarily
|
|
|
+for and in connection with specific products or compilations that
|
|
|
+contain the covered work, unless you entered into that arrangement,
|
|
|
+or that patent license was granted, prior to 28 March 2007.
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|
|
+
|
|
|
+ Nothing in this License shall be construed as excluding or limiting
|
|
|
+any implied license or other defenses to infringement that may
|
|
|
+otherwise be available to you under applicable patent law.
|
|
|
+
|
|
|
+ 12. No Surrender of Others' Freedom.
|
|
|
+
|
|
|
+ If conditions are imposed on you (whether by court order, agreement or
|
|
|
+otherwise) that contradict the conditions of this License, they do not
|
|
|
+excuse you from the conditions of this License. If you cannot convey a
|
|
|
+covered work so as to satisfy simultaneously your obligations under this
|
|
|
+License and any other pertinent obligations, then as a consequence you may
|
|
|
+not convey it at all. For example, if you agree to terms that obligate you
|
|
|
+to collect a royalty for further conveying from those to whom you convey
|
|
|
+the Program, the only way you could satisfy both those terms and this
|
|
|
+License would be to refrain entirely from conveying the Program.
|
|
|
+
|
|
|
+ 13. Use with the GNU Affero General Public License.
|
|
|
+
|
|
|
+ Notwithstanding any other provision of this License, you have
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|
|
+permission to link or combine any covered work with a work licensed
|
|
|
+under version 3 of the GNU Affero General Public License into a single
|
|
|
+combined work, and to convey the resulting work. The terms of this
|
|
|
+License will continue to apply to the part which is the covered work,
|
|
|
+but the special requirements of the GNU Affero General Public License,
|
|
|
+section 13, concerning interaction through a network will apply to the
|
|
|
+combination as such.
|
|
|
+
|
|
|
+ 14. Revised Versions of this License.
|
|
|
+
|
|
|
+ The Free Software Foundation may publish revised and/or new versions of
|
|
|
+the GNU General Public License from time to time. Such new versions will
|
|
|
+be similar in spirit to the present version, but may differ in detail to
|
|
|
+address new problems or concerns.
|
|
|
+
|
|
|
+ Each version is given a distinguishing version number. If the
|
|
|
+Program specifies that a certain numbered version of the GNU General
|
|
|
+Public License "or any later version" applies to it, you have the
|
|
|
+option of following the terms and conditions either of that numbered
|
|
|
+version or of any later version published by the Free Software
|
|
|
+Foundation. If the Program does not specify a version number of the
|
|
|
+GNU General Public License, you may choose any version ever published
|
|
|
+by the Free Software Foundation.
|
|
|
+
|
|
|
+ If the Program specifies that a proxy can decide which future
|
|
|
+versions of the GNU General Public License can be used, that proxy's
|
|
|
+public statement of acceptance of a version permanently authorizes you
|
|
|
+to choose that version for the Program.
|
|
|
+
|
|
|
+ Later license versions may give you additional or different
|
|
|
+permissions. However, no additional obligations are imposed on any
|
|
|
+author or copyright holder as a result of your choosing to follow a
|
|
|
+later version.
|
|
|
+
|
|
|
+ 15. Disclaimer of Warranty.
|
|
|
+
|
|
|
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
|
|
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
|
|
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
|
|
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
|
|
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
|
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
|
|
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
|
|
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
|
|
+
|
|
|
+ 16. Limitation of Liability.
|
|
|
+
|
|
|
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
|
|
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
|
|
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
|
|
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
|
|
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
|
|
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
|
|
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
|
|
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
|
|
+SUCH DAMAGES.
|
|
|
+
|
|
|
+ 17. Interpretation of Sections 15 and 16.
|
|
|
+
|
|
|
+ If the disclaimer of warranty and limitation of liability provided
|
|
|
+above cannot be given local legal effect according to their terms,
|
|
|
+reviewing courts shall apply local law that most closely approximates
|
|
|
+an absolute waiver of all civil liability in connection with the
|
|
|
+Program, unless a warranty or assumption of liability accompanies a
|
|
|
+copy of the Program in return for a fee.
|
|
|
+
|
|
|
+ END OF TERMS AND CONDITIONS
|
|
|
+
|
|
|
+ How to Apply These Terms to Your New Programs
|
|
|
+
|
|
|
+ If you develop a new program, and you want it to be of the greatest
|
|
|
+possible use to the public, the best way to achieve this is to make it
|
|
|
+free software which everyone can redistribute and change under these terms.
|
|
|
+
|
|
|
+ To do so, attach the following notices to the program. It is safest
|
|
|
+to attach them to the start of each source file to most effectively
|
|
|
+state the exclusion of warranty; and each file should have at least
|
|
|
+the "copyright" line and a pointer to where the full notice is found.
|
|
|
+
|
|
|
+ <one line to give the program's name and a brief idea of what it does.>
|
|
|
+ Copyright (C) <year> <name of author>
|
|
|
+
|
|
|
+ This program is free software: you can redistribute it and/or modify
|
|
|
+ it under the terms of the GNU General Public License as published by
|
|
|
+ the Free Software Foundation, either version 3 of the License, or
|
|
|
+ (at your option) any later version.
|
|
|
+
|
|
|
+ This program is distributed in the hope that it will be useful,
|
|
|
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
+ GNU General Public License for more details.
|
|
|
+
|
|
|
+ You should have received a copy of the GNU General Public License
|
|
|
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
+
|
|
|
+Also add information on how to contact you by electronic and paper mail.
|
|
|
+
|
|
|
+ If the program does terminal interaction, make it output a short
|
|
|
+notice like this when it starts in an interactive mode:
|
|
|
+
|
|
|
+ <program> Copyright (C) <year> <name of author>
|
|
|
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
|
|
+ This is free software, and you are welcome to redistribute it
|
|
|
+ under certain conditions; type `show c' for details.
|
|
|
+
|
|
|
+The hypothetical commands `show w' and `show c' should show the appropriate
|
|
|
+parts of the General Public License. Of course, your program's commands
|
|
|
+might be different; for a GUI interface, you would use an "about box".
|
|
|
+
|
|
|
+ You should also get your employer (if you work as a programmer) or school,
|
|
|
+if any, to sign a "copyright disclaimer" for the program, if necessary.
|
|
|
+For more information on this, and how to apply and follow the GNU GPL, see
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+<http://www.gnu.org/licenses/>.
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+
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+ The GNU General Public License does not permit incorporating your program
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+into proprietary programs. If your program is a subroutine library, you
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+may consider it more useful to permit linking proprietary applications with
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+the library. If this is what you want to do, use the GNU Lesser General
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+Public License instead of this License. But first, please read
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+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
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+
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+*/
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Paul Razvan Berg