updated deps

contracts/_external/BytesLib.sol

@@ -15,7 +15,11 @@ library BytesLib {
         bytes memory _bytes,
         uint256 _start,
         uint256 _length
-    ) internal pure returns (bytes memory) {
+    )
+        internal
+        pure
+        returns (bytes memory)
+    {
         require(_length + 31 >= _length, "slice_overflow");
         require(_start + _length >= _start, "slice_overflow");
         require(_bytes.length >= _start + _length, "slice_outOfBounds");
@@ -24,57 +28,54 @@ library BytesLib {
 
         assembly {
             switch iszero(_length)
-                case 0 {
-                    // Get a location of some free memory and store it in tempBytes as
-                    // Solidity does for memory variables.
-                    tempBytes := mload(0x40)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
 
-                    // The first word of the slice result is potentially a partial
-                    // word read from the original array. To read it, we calculate
-                    // the length of that partial word and start copying that many
-                    // bytes into the array. The first word we copy will start with
-                    // data we don't care about, but the last `lengthmod` bytes will
-                    // land at the beginning of the contents of the new array. When
-                    // we're done copying, we overwrite the full first word with
-                    // the actual length of the slice.
-                    let lengthmod := and(_length, 31)
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                let lengthmod := and(_length, 31)
 
-                    // The multiplication in the next line is necessary
-                    // because when slicing multiples of 32 bytes (lengthmod == 0)
-                    // the following copy loop was copying the origin's length
-                    // and then ending prematurely not copying everything it should.
-                    let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
-                    let end := add(mc, _length)
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, _length)
 
-                    for {
-                        // The multiplication in the next line has the same exact purpose
-                        // as the one above.
-                        let cc := add(
-                            add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))),
-                            _start
-                        )
-                    } lt(mc, end) {
-                        mc := add(mc, 0x20)
-                        cc := add(cc, 0x20)
-                    } {
-                        mstore(mc, mload(cc))
-                    }
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
 
-                    mstore(tempBytes, _length)
+                mstore(tempBytes, _length)
 
-                    //update free-memory pointer
-                    //allocating the array padded to 32 bytes like the compiler does now
-                    mstore(0x40, and(add(mc, 31), not(31)))
-                }
-                //if we want a zero-length slice let's just return a zero-length array
-                default {
-                    tempBytes := mload(0x40)
-                    //zero out the 32 bytes slice we are about to return
-                    //we need to do it because Solidity does not garbage collect
-                    mstore(tempBytes, 0)
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+                //zero out the 32 bytes slice we are about to return
+                //we need to do it because Solidity does not garbage collect
+                mstore(tempBytes, 0)
 
-                    mstore(0x40, add(tempBytes, 0x20))
-                }
+                mstore(0x40, add(tempBytes, 0x20))
+            }
         }
 
         return tempBytes;

package.json

@@ -56,7 +56,6 @@
   },
   "dependencies": {
     "@openzeppelin/contracts": "^4.0.0",
-    "hardhat-gas-reporter": "^1.0.4",
-    "solidity-bytes-utils": "0.1.1"
+    "hardhat-gas-reporter": "^1.0.4"
   }
 }