Oko contract explorer
Contract

Code for 0xc02a…6cc2 (Token Contract, WETH9, WrappedEther, 0x Ecosystem, Stablecoin, https://weth.io/, Wrapped Ether (WETH))

Since block 4719568

Verified contract

  1. /**
  2. *Submitted for verification at Etherscan.io on 2017-12-12
  3. */
  4. // Copyright (C) 2015, 2016, 2017 Dapphub
  5. // This program is free software: you can redistribute it and/or modify
  6. // it under the terms of the GNU General Public License as published by
  7. // the Free Software Foundation, either version 3 of the License, or
  8. // (at your option) any later version.
  9. // This program is distributed in the hope that it will be useful,
  10. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12. // GNU General Public License for more details.
  13. // You should have received a copy of the GNU General Public License
  14. // along with this program. If not, see <http://www.gnu.org/licenses/>.
  15. pragma solidity ^0.4.18;
  16. contract WETH9 {
  17. string public name = "Wrapped Ether";
  18. string public symbol = "WETH";
  19. uint8 public decimals = 18;
  20. event Approval(address indexed src, address indexed guy, uint wad);
  21. event Transfer(address indexed src, address indexed dst, uint wad);
  22. event Deposit(address indexed dst, uint wad);
  23. event Withdrawal(address indexed src, uint wad);
  24. mapping (address => uint) public balanceOf;
  25. mapping (address => mapping (address => uint)) public allowance;
  26. function() public payable {
  27. deposit();
  28. }
  29. function deposit() public payable {
  30. balanceOf[msg.sender] += msg.value;
  31. Deposit(msg.sender, msg.value);
  32. }
  33. function withdraw(uint wad) public {
  34. require(balanceOf[msg.sender] >= wad);
  35. balanceOf[msg.sender] -= wad;
  36. msg.sender.transfer(wad);
  37. Withdrawal(msg.sender, wad);
  38. }
  39. function totalSupply() public view returns (uint) {
  40. return this.balance;
  41. }
  42. function approve(address guy, uint wad) public returns (bool) {
  43. allowance[msg.sender][guy] = wad;
  44. Approval(msg.sender, guy, wad);
  45. return true;
  46. }
  47. function transfer(address dst, uint wad) public returns (bool) {
  48. return transferFrom(msg.sender, dst, wad);
  49. }
  50. function transferFrom(address src, address dst, uint wad)
  51. public
  52. returns (bool)
  53. {
  54. require(balanceOf[src] >= wad);
  55. if (src != msg.sender &amp;&amp; allowance[src][msg.sender] != uint(-1)) {
  56. require(allowance[src][msg.sender] >= wad);
  57. allowance[src][msg.sender] -= wad;
  58. }
  59. balanceOf[src] -= wad;
  60. balanceOf[dst] += wad;
  61. Transfer(src, dst, wad);
  62. return true;
  63. }
  64. }
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  512. 12. No Surrender of Others' Freedom.
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  599. Also add information on how to contact you by electronic and paper mail.
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  602. Copyright (C) <year> <name of author>
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  604. This is free software, and you are welcome to redistribute it
  605. under certain conditions; type `show c' for details.
  606. The hypothetical commands `show w' and `show c' should show the appropriate
  607. parts of the General Public License. Of course, your program's commands
  608. might be different; for a GUI interface, you would use an "about box".
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  610. if any, to sign a "copyright disclaimer" for the program, if necessary.
  611. For more information on this, and how to apply and follow the GNU GPL, see
  612. <http://www.gnu.org/licenses/>.
  613. The GNU General Public License does not permit incorporating your program
  614. into proprietary programs. If your program is a subroutine library, you
  615. may consider it more useful to permit linking proprietary applications with
  616. the library. If this is what you want to do, use the GNU Lesser General
  617. Public License instead of this License. But first, please read
  618. <http://www.gnu.org/philosophy/why-not-lgpl.html>.
  619. */

Contract sourced from Etherscan. Solidity version v0.4.19+commit.c4cbbb05.

Panoramix decompilation

# Palkeoramix decompiler. 

const totalSupply = eth.balance(this.address)

def storage:
  name is array of uint256 at storage 0
  symbol is array of uint256 at storage 1
  decimals is uint8 at storage 2
  balanceOf is mapping of uint256 at storage 3
  allowance is mapping of uint256 at storage 4

def name(): # not payable
  return name[0 len name.length]

def decimals(): # not payable
  return decimals

def balanceOf(address _owner): # not payable
  return balanceOf[_owner]

def symbol(): # not payable
  return symbol[0 len symbol.length]

def allowance(address _owner, address _spender): # not payable
  return allowance[_owner][_spender]

#
#  Regular functions
#

def deposit() payable: 
  balanceOf[caller] += call.value
  log Deposit(
        address sender=call.value,
        uint256 value=caller)

def _fallback() payable: # default function
  balanceOf[caller] += call.value
  log Deposit(
        address sender=call.value,
        uint256 value=caller)

def approve(address _spender, uint256 _value): # not payable
  allowance[caller][addr(_spender)] = _value
  log Approval(
        address tokenOwner=_value,
        address spender=caller,
        uint256 tokens=_spender)
  return 1

def withdraw(uint256 _amount): # not payable
  require balanceOf[caller] >= _amount
  balanceOf[caller] -= _amount
  call caller with:
     value _amount wei
       gas 2300 * is_zero(value) wei
  require ext_call.success
  log Withdrawal(
        address receiver=_amount,
        uint256 amount=caller)

def transfer(address _to, uint256 _value): # not payable
  require balanceOf[caller] >= _value
  if caller != caller:
      if allowance[caller][caller] != -1:
          require allowance[caller][caller] >= _value
          allowance[caller][caller] -= _value
  balanceOf[caller] -= _value
  balanceOf[addr(_to)] += _value
  log Transfer(
        address from=_value,
        address to=caller,
        uint256 tokens=_to)
  return 1

def transferFrom(address _from, address _to, uint256 _value): # not payable
  require balanceOf[addr(_from)] >= _value
  if _from != caller:
      if allowance[addr(_from)][caller] != -1:
          require allowance[addr(_from)][caller] >= _value
          allowance[addr(_from)][caller] -= _value
  balanceOf[addr(_from)] -= _value
  balanceOf[addr(_to)] += _value
  log Transfer(
        address from=_value,
        address to=_from,
        uint256 tokens=_to)
  return 1

Decompilation generated by Panoramix.

Raw bytecode

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