Can message with all addresses (#250)

* add can message function

* write a test

Sources/XMTPiOS/Client.swift

@@ -237,6 +237,15 @@ public final class Client {
 
 		return try await v3Client.canMessage(accountAddresses: [address]) == [true]
 	}
+
+	public func canMessageV3(addresses: [String]) async throws -> Bool {
+		guard let v3Client else {
+			return false
+		}
+
+		return try await v3Client.canMessage(accountAddresses: addresses) == [true]
+	}
+
 
 	public static func from(bundle: PrivateKeyBundle, options: ClientOptions? = nil) async throws -> Client {
 		return try await from(v1Bundle: bundle.v1, options: options)

Tests/XMTPTests/GroupTests.swift

@@ -173,6 +173,15 @@ class GroupTests: XCTestCase {
 		XCTAssertEqual(groupChangedMessage.membersRemoved.map(\.accountAddress.localizedLowercase), [fixtures.fred.address.localizedLowercase])
 	}
 
+	func testCanMessage() async throws {
+		let fixtures = try await localFixtures()
+		let notOnNetwork = try PrivateKey.generate()
+		let canMessage = try await fixtures.aliceClient.canMessageV3(addresses: [fixtures.bobClient.address])
+		let cannotMessage = try await fixtures.aliceClient.canMessageV3(addresses: [notOnNetwork.address])
+		XCTAssert(canMessage)
+		XCTAssert(!cannotMessage)
+	}
+
 	func testIsActive() async throws {
 		let fixtures = try await localFixtures()
 		let group = try await fixtures.aliceClient.conversations.newGroup(with: [fixtures.bob.address, fixtures.fred.address])