Add CreateFileExample

Examples/CreateFile/main.swift

@@ -0,0 +1,18 @@
+import Hedera
+
+let privateKey = Ed25519PrivateKey("yourprivatekeyhere")!
+let op = Operator(id: AccountId(2), privateKey: privateKey)
+
+let client = Client(node: AccountId("0.0.3")!, address: "0.testnet.hedera.com:50211")
+    .setMaxTransactionFee(100_000_000)
+    .setOperator(op)
+
+let fileCreateTransactionId = try! FileCreateTransaction(client: client)
+    .addKey(privateKey.publicKey)
+    .setContents("This is a test")
+    .setMemo("File Create Example - Swift SDK")
+    .setTransactionFee(1_000_000_000)
+    .build()
+    .execute()
+
+print("File Create Example succeeded with transaction id \(fileCreateTransactionId)")

Package.swift

@@ -15,6 +15,7 @@ let package = Package(
             targets: ["Hedera"]),
         .executable(name: "CreateAccountExample", targets: ["CreateAccountExample"]),
         .executable(name: "GetFileInfoExample", targets: ["GetFileInfoExample"]),
+        .executable(name: "CreateFileExample", targets: ["CreateFileExample"]),
     ],
     dependencies: [
         .package(url: "https://github.com/jedisct1/swift-sodium", .exact("0.8.0")),
@@ -38,5 +39,9 @@ let package = Package(
              name: "GetFileInfoExample",
              dependencies: ["Hedera"],
              path: "Examples/GetFileInfo"),
+         .target(
+             name: "CreateFileExample",
+             dependencies: ["Hedera"],
+             path: "Examples/CreateFile"),
     ]
 )

Sources/Hedera/file/FileCreateTransaction.swift

@@ -8,9 +8,9 @@ public class FileCreateTransaction: TransactionBuilder {
 
         body.fileCreate = Proto_FileCreateTransactionBody()
 
-        // For files and contracts expiration time needs be set to now + 7898 seconds
+        // For files and contracts expiration time needs be set to now + 7,890,000 seconds
         // otherwise file/contract creation fails
-        setExpirationTime(Date(timeIntervalSinceNow: 7898))
+        setExpirationTime(Date(timeIntervalSinceNow: 7890000))
     }
 
     /// Set the expiration time of the file