Create transferProxy.sol

contracts/transferProxy.sol

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.17;
+
+/// @author lcfr.eth
+/// @notice helper contract for Flashbots rescues using bundler.lcfr.io
+
+contract transferProxy {
+
+    error notApproved();
+
+    function transfer(bytes[] calldata _data, address _contract, address _from) external {
+        assembly {
+            // check if caller isApprovedForAll() by _from on _contract or revert
+            mstore(0x00, shl(224, 0xe985e9c5)) 
+            mstore(add(0x00, 0x04), _from) 
+            mstore(add(0x00, 0x24), caller())
+
+            let success := staticcall(gas(), _contract, 0x00, 0x44, 0x00, 0x00)
+
+            returndatacopy(0x00, 0x00, returndatasize())
+
+            if iszero(success) {
+                revert(0x00, returndatasize())
+            }
+
+            if iszero(mload(0x00)) {
+                mstore(0x00, shl(224, 0x383462e29))
+                revert(0x00, 0x04)
+            }
+
+            let i := 0
+            for {} 1 { i:= add(i, 1) } {
+                if eq(i, _data.length){ break }
+
+                let data := calldataload(add(_data.offset, shl(5, i)))
+                let len := calldataload(add(_data.offset, data))
+
+                calldatacopy(0x00, add(_data.offset, add(data, 0x20)), len)
+
+                success := call( gas(), _contract, 0x00, 0x00, len, 0x00, 0x00)
+
+                if iszero(success) {
+                    returndatacopy(0x00, 0x00, returndatasize())
+                    revert(0x00, returndatasize())
+                }
+            }
+        }
+    }
+}