fix(swift): give some closures their return types

Signed-off-by: Skyler Ross <[email protected]>

Author: izik1

sdk/swift/Sources/Hedera/Data+Extensions.swift

@@ -45,7 +45,7 @@ extension Data {
     // safety: `hedera_bytes_free` needs to be called so...
     // perf: might as well enable use of the no copy constructor.
     internal static let unsafeCHederaBytesFree: Data.Deallocator = .custom { (buf, size) in
-        hedera_bytes_free(buf, size)
+        hedera_bytes_free(buf.bindMemory(to: UInt8.self, capacity: size), size)
     }
 
     private static let hexAlphabet = Array("0123456789abcdef".unicodeScalars)

sdk/swift/Sources/Hedera/PrivateKey.swift

@@ -54,18 +54,16 @@ public final class PrivateKey: LosslessStringConvertible, ExpressibleByStringLit
     }
 
     private static func unsafeFromAnyBytes(_ bytes: Data, _ chederaCallback: UnsafeFromBytesFunc) throws -> Self {
-        let ptr = try bytes.withUnsafeTypedBytes { pointer in
+        try bytes.withUnsafeTypedBytes { pointer -> Self in
             var key: OpaquePointer? = nil
             let err = chederaCallback(pointer.baseAddress, pointer.count, &key)
 
             if err != HEDERA_ERROR_OK {
                 throw HError(err)!
             }
 
-            return key!
+            return Self(key!)
         }
-
-        return Self(ptr)
     }
 
     public static func fromBytes(_ bytes: Data) throws -> Self {

sdk/swift/Sources/Hedera/PublicKey.swift

@@ -41,18 +41,16 @@ public final class PublicKey: LosslessStringConvertible, ExpressibleByStringLite
     }
 
     private static func unsafeFromAnyBytes(_ bytes: Data, _ chederaCallback: UnsafeFromBytesFunc) throws -> Self {
-        let ptr = try bytes.withUnsafeTypedBytes { pointer in
+        try bytes.withUnsafeTypedBytes { pointer -> Self in
             var key: OpaquePointer? = nil
             let err = chederaCallback(pointer.baseAddress, pointer.count, &key)
 
             if err != HEDERA_ERROR_OK {
                 throw HError(err)!
             }
 
-            return key!
+            return Self(key!)
         }
-
-        return Self(ptr)
     }
 
     public static func fromBytes(_ bytes: Data) throws -> Self {

sdk/swift/Sources/Hedera/Signer.swift

@@ -13,7 +13,7 @@ func sign(
     let signatureData = signer.signFunc(messageData)
 
     // raw pointer timeeee (yes, we do need to double copy.)
-    let buffer = signatureData.withUnsafeBytes { dataBuffer in
+    let buffer = signatureData.withUnsafeBytes { dataBuffer -> UnsafeMutableBufferPointer<UInt8> in
         let buffer = UnsafeMutableRawBufferPointer.allocate(byteCount: dataBuffer.count, alignment: 1)
         buffer.copyBytes(from: dataBuffer)
         return buffer.bindMemory(to: UInt8.self)