lib_sol8->lib_uniswap

2023-11-05 20:00:59 -08:00
parent 779c180fad
commit 3522c9b59b
41 changed files with 4 additions and 4 deletions
--- a/lib_uniswap/v3-periphery/contracts/libraries/TransferHelper.sol
+++ b/lib_uniswap/v3-periphery/contracts/libraries/TransferHelper.sol
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+pragma solidity >=0.6.0;
+
+import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
+
+library TransferHelper {
+    /// @notice Transfers tokens from the targeted address to the given destination
+    /// @notice Errors with 'STF' if transfer fails
+    /// @param token The contract address of the token to be transferred
+    /// @param from The originating address from which the tokens will be transferred
+    /// @param to The destination address of the transfer
+    /// @param value The amount to be transferred
+    function safeTransferFrom(
+        address token,
+        address from,
+        address to,
+        uint256 value
+    ) internal {
+        (bool success, bytes memory data) =
+            token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, from, to, value));
+        require(success && (data.length == 0 || abi.decode(data, (bool))), 'STF');
+    }
+
+    /// @notice Transfers tokens from msg.sender to a recipient
+    /// @dev Errors with ST if transfer fails
+    /// @param token The contract address of the token which will be transferred
+    /// @param to The recipient of the transfer
+    /// @param value The value of the transfer
+    function safeTransfer(
+        address token,
+        address to,
+        uint256 value
+    ) internal {
+        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transfer.selector, to, value));
+        require(success && (data.length == 0 || abi.decode(data, (bool))), 'ST');
+    }
+
+    /// @notice Approves the stipulated contract to spend the given allowance in the given token
+    /// @dev Errors with 'SA' if transfer fails
+    /// @param token The contract address of the token to be approved
+    /// @param to The target of the approval
+    /// @param value The amount of the given token the target will be allowed to spend
+    function safeApprove(
+        address token,
+        address to,
+        uint256 value
+    ) internal {
+        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.approve.selector, to, value));
+        require(success && (data.length == 0 || abi.decode(data, (bool))), 'SA');
+    }
+
+    /// @notice Transfers ETH to the recipient address
+    /// @dev Fails with `STE`
+    /// @param to The destination of the transfer
+    /// @param value The value to be transferred
+    function safeTransferETH(address to, uint256 value) internal {
+        (bool success, ) = to.call{value: value}(new bytes(0));
+        require(success, 'STE');
+    }
+}