extract HomeModel from ContentView

huge refactor

Signed-off-by: William Casarin <jb55@jb55.com>

damusTests/Bech32Tests.swift

@@ -0,0 +1,51 @@
+//
+//  Bech32Tests.swift
+//  damusTests
+//
+//  Created by William Casarin on 2022-05-22.
+//
+
+import XCTest
+@testable import damus
+
+class Bech32Tests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func test_bech32_encode_decode() throws {
+        // This is an example of a functional test case.
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+        // Any test you write for XCTest can be annotated as throws and async.
+        // Mark your test throws to produce an unexpected failure when your test encounters an uncaught error.
+        // Mark your test async to allow awaiting for asynchronous code to complete. Check the results with assertions afterwards.
+        
+        let pubkey = "32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245"
+        guard let b32_pubkey = bech32_pubkey(pubkey) else {
+            XCTAssert(false)
+            return
+        }
+        
+        guard let decoded = try? bech32_decode(b32_pubkey) else {
+            XCTAssert(false)
+            return
+        }
+        
+        let encoded = hex_encode(decoded.data)
+        
+        XCTAssertEqual(encoded, pubkey)
+    }
+
+    func testPerformanceExample() throws {
+        // This is an example of a performance test case.
+        self.measure {
+            // Put the code you want to measure the time of here.
+        }
+    }
+
+}