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12 changes: 6 additions & 6 deletions tutorial-09/ERC20.sol
Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
pragma solidity ^0.4.0;

interface ERC20 {
function totalSupply() constant returns (uint _totalSupply);
function balanceOf(address _owner) constant returns (uint balance);
function transfer(address _to, uint _value) returns (bool success);
function transferFrom(address _from, address _to, uint _value) returns (bool success);
function approve(address _spender, uint _value) returns (bool success);
function allowance(address _owner, address _spender) constant returns (uint remaining);
function totalSupply() external constant returns (uint _totalSupply);
function balanceOf(address _owner) external constant returns (uint balance);
function transfer(address _to, uint _value) external returns (bool success);
function transferFrom(address _from, address _to, uint _value) external returns (bool success);
function approve(address _spender, uint _value) external returns (bool success);
function allowance(address _owner, address _spender) external constant returns (uint remaining);
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
}