59 lines
1.7 KiB
Solidity
59 lines
1.7 KiB
Solidity
// SPDX-License-Identifier: Apache-2.0
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/*
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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;
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pragma experimental ABIEncoderV2;
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import "@0x/contracts-erc20/contracts/src/v06/LibERC20TokenV06.sol";
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contract SamplerUtils {
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/// @dev Overridable way to get token decimals.
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/// @param tokenAddress Address of the token.
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/// @return decimals The decimal places for the token.
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function _getTokenDecimals(address tokenAddress)
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virtual
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internal
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view
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returns (uint8 decimals)
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{
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return LibERC20TokenV06.compatDecimals(IERC20TokenV06(tokenAddress));
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}
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function _toSingleValueArray(uint256 v)
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internal
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pure
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returns (uint256[] memory arr)
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{
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arr = new uint256[](1);
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arr[0] = v;
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}
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/// @dev Assert that the tokens in a trade pair are valid.
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/// @param makerToken Address of the maker token.
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/// @param takerToken Address of the taker token.
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function _assertValidPair(address makerToken, address takerToken)
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internal
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pure
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{
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require(makerToken != takerToken, "ERC20BridgeSampler/INVALID_TOKEN_PAIR");
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}
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}
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