861871134b
add LibTokenSpender and convert to using that This skips the allowance target. Allowances are instead just set on the exchange proxy itself. There is a fallback, though, to try spending from the allowance target if the original transfer fails.
73 lines
1.8 KiB
Solidity
73 lines
1.8 KiB
Solidity
/*
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Copyright 2020 ZeroEx Intl.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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pragma solidity ^0.6.5;
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pragma experimental ABIEncoderV2;
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import "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
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import "../src/features/libs/LibTokenSpender.sol";
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contract TestLibTokenSpender {
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uint256 constant private TRIGGER_FALLBACK_SUCCESS_AMOUNT = 1340;
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function spendERC20Tokens(
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IERC20TokenV06 token,
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address owner,
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address to,
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uint256 amount
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)
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external
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{
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LibTokenSpender.spendERC20Tokens(token, owner, to, amount);
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}
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event FallbackCalled(
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address token,
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address owner,
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address to,
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uint256 amount
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);
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// This is called as a fallback when the original transferFrom() fails.
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function _spendERC20Tokens(
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IERC20TokenV06 token,
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address owner,
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address to,
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uint256 amount
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)
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external
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{
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require(amount == TRIGGER_FALLBACK_SUCCESS_AMOUNT,
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"TokenSpenderFallback/FAILURE_AMOUNT");
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emit FallbackCalled(address(token), owner, to, amount);
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}
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function getSpendableERC20BalanceOf(
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IERC20TokenV06 token,
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address owner
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)
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external
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view
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returns (uint256)
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{
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return LibTokenSpender.getSpendableERC20BalanceOf(token, owner);
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}
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}
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