Oko contract explorer

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
  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. }
  65. /*
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  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