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-rw-r--r--packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol58
1 files changed, 58 insertions, 0 deletions
diff --git a/packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol b/packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol
new file mode 100644
index 000000000..0e5b87aa4
--- /dev/null
+++ b/packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol
@@ -0,0 +1,58 @@
+pragma solidity ^0.4.18;
+
+import { Token } from "../Token/Token.sol";
+
+contract ERC20Token is Token {
+
+ function transfer(address _to, uint _value)
+ public
+ returns (bool)
+ {
+ require(balances[msg.sender] >= _value && balances[_to] + _value >= balances[_to]);
+ balances[msg.sender] -= _value;
+ balances[_to] += _value;
+ Transfer(msg.sender, _to, _value);
+ return true;
+ }
+
+ function transferFrom(address _from, address _to, uint _value)
+ public
+ returns (bool)
+ {
+ require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value >= balances[_to]);
+ balances[_to] += _value;
+ balances[_from] -= _value;
+ allowed[_from][msg.sender] -= _value;
+ Transfer(_from, _to, _value);
+ return true;
+ }
+
+ function approve(address _spender, uint _value)
+ public
+ returns (bool)
+ {
+ allowed[msg.sender][_spender] = _value;
+ Approval(msg.sender, _spender, _value);
+ return true;
+ }
+
+ function balanceOf(address _owner)
+ public
+ view
+ returns (uint)
+ {
+ return balances[_owner];
+ }
+
+ function allowance(address _owner, address _spender)
+ public
+ view
+ returns (uint)
+ {
+ return allowed[_owner][_spender];
+ }
+
+ mapping (address => uint) balances;
+ mapping (address => mapping (address => uint)) allowed;
+ uint public totalSupply;
+}