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Keybase proof

I hereby claim:

  • I am sg552 on github.
  • I am siwei ( on keybase.
  • I have a public key ASDL5VM_vjBIyg2sMyvVgK2bPynSWJRzF2srO4-MITf1HAo

To claim this, I am signing this object:

sg552 / ERC20.sol
Created July 12, 2018 06:55
Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at
pragma solidity ^0.4.10;
interface ERC20 {
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);