23 lines
667 B
Solidity
23 lines
667 B
Solidity
pragma solidity ^0.4.8;
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import "./ERC20.sol";
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contract TransferableToken is ERC20 {
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modifier canTransfer(address _sender, uint _value) {
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if (_value > transferableTokens(_sender, uint64(now))) throw;
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_;
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}
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function transfer(address _to, uint _value) canTransfer(msg.sender, _value) returns (bool success) {
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return super.transfer(_to, _value);
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}
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function transferFrom(address _from, address _to, uint _value) canTransfer(_from, _value) returns (bool success) {
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return super.transferFrom(_from, _to, _value);
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}
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function transferableTokens(address holder, uint64 time) constant public returns (uint256) {
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return balanceOf(holder);
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}
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}
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