61 lines
2.5 KiB
Solidity
61 lines
2.5 KiB
Solidity
// SPDX-License-Identifier: GPL-2.0-or-later
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pragma solidity >=0.6.0;
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import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
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library TransferHelper {
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/// @notice Transfers tokens from the targeted address to the given destination
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/// @notice Errors with 'STF' if transfer fails
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/// @param token The contract address of the token to be transferred
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/// @param from The originating address from which the tokens will be transferred
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/// @param to The destination address of the transfer
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/// @param value The amount to be transferred
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function safeTransferFrom(
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address token,
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address from,
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address to,
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uint256 value
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) internal {
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(bool success, bytes memory data) =
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token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, from, to, value));
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require(success && (data.length == 0 || abi.decode(data, (bool))), 'STF');
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}
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/// @notice Transfers tokens from msg.sender to a recipient
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/// @dev Errors with ST if transfer fails
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/// @param token The contract address of the token which will be transferred
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/// @param to The recipient of the transfer
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/// @param value The value of the transfer
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function safeTransfer(
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address token,
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address to,
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uint256 value
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) internal {
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(bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transfer.selector, to, value));
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require(success && (data.length == 0 || abi.decode(data, (bool))), 'ST');
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}
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/// @notice Approves the stipulated contract to spend the given allowance in the given token
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/// @dev Errors with 'SA' if transfer fails
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/// @param token The contract address of the token to be approved
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/// @param to The target of the approval
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/// @param value The amount of the given token the target will be allowed to spend
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function safeApprove(
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address token,
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address to,
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uint256 value
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) internal {
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(bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.approve.selector, to, value));
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require(success && (data.length == 0 || abi.decode(data, (bool))), 'SA');
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}
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/// @notice Transfers ETH to the recipient address
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/// @dev Fails with `STE`
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/// @param to The destination of the transfer
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/// @param value The value to be transferred
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function safeTransferETH(address to, uint256 value) internal {
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(bool success, ) = to.call{value: value}(new bytes(0));
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require(success, 'STE');
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}
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}
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