Added signTransaction

SolanaWrapperDemo/SolanaWrapperDemo/ViewController.swift

@@ -27,7 +27,12 @@ class ViewController: UIViewController {
             } failure: { error in
                 print(error)
             }*/
-            solana.getAddress(path: self.DERIVATION_PATH_SOL) { response in
+            /*solana.getAddress(path: self.DERIVATION_PATH_SOL) { response in
+                print("Response received: \(response)")
+            } failure: { error in
+                print(error)
+            }*/
+            solana.signTransaction(path: self.DERIVATION_PATH_SOL, txBuffer: [1, 2, 3]) { response in
                 print("Response received: \(response)")
             } failure: { error in
                 print(error)

Sources/SolanaWrapper/SolanaWrapper.swift

@@ -30,6 +30,7 @@ public class SolanaWrapper: Wrapper {
         return jsContext
     }()
 
+    var transportInstance: JSValue?
     var solanaInstance: JSValue?
 
     public override init() {
@@ -54,7 +55,8 @@ public class SolanaWrapper: Wrapper {
     fileprivate func loadInstance() {
         guard let module = jsContext.objectForKeyedSubscript("TransportModule") else { return }
         guard let transportModule = module.objectForKeyedSubscript("TransportBLEiOS") else { return }
-        guard let transportInstance = transportModule.construct(withArguments: []) else { return }
+        transportInstance = transportModule.construct(withArguments: [])
+        guard let transportInstance = transportInstance else { return }
         guard let solanaModule = module.objectForKeyedSubscript("Solana") else { return }
         solanaInstance = solanaModule.construct(withArguments: [transportInstance])
     }
@@ -96,6 +98,25 @@ public class SolanaWrapper: Wrapper {
             }
         }
     }
+
+    public func signTransaction(path: String, txBuffer: [UInt8], success: @escaping ((String)->()), failure: @escaping ((String)->())) {
+        guard let solanaInstance = solanaInstance else { return }
+        guard let transportInstance = transportInstance else { return }
+        guard let buffer = transportInstance.invokeMethod("arrayToBuffer", withArguments: [txBuffer]) else { failure("Couldn't create buffer"); return }
+        solanaInstance.invokeMethodAsync("signTransaction", withArguments: [path, buffer]) { resolve, reject in
+            if let resolve = resolve {
+                if let dict = resolve.toDictionary() as? [String: Any], let addressDict = dict["signature"] as? [String: AnyObject] {
+                    let data = self.parseBuffer(dict: addressDict)
+                    let base58 = Base58.base58Encode(data)
+                    success(base58)
+                } else {
+                    failure("Resolved but couldn't parse")
+                }
+            } else if let reject = reject {
+                failure("REJECTED. Value: \(reject)")
+            }
+        }
+    }
 }
 
 enum PubKeyDisplayMode: Int {