94 lines
3.1 KiB
Swift
94 lines
3.1 KiB
Swift
//
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// Copyright © 2019 Gnosis Ltd. All rights reserved.
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//
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import Foundation
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import WalletConnectSwift
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protocol WalletConnectDelegate {
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func failedToConnect()
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func didConnect()
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func didDisconnect()
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}
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class WalletConnect {
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var client: Client!
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var session: Session!
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var delegate: WalletConnectDelegate
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let sessionKey = "sessionKey"
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init(delegate: WalletConnectDelegate) {
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self.delegate = delegate
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}
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func connect() -> String {
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// gnosis wc bridge: https://safe-walletconnect.gnosis.io/
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// test bridge with latest protocol version: https://bridge.walletconnect.org
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let wcUrl = WCURL(topic: UUID().uuidString,
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bridgeURL: URL(string: "https://bridge.walletconnect.org")!,
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key: try! randomKey())
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let clientMeta = Session.ClientMeta(name: "ExampleDApp",
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description: "WalletConnectSwift",
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icons: [],
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url: URL(string: "https://safe.gnosis.io")!)
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let dAppInfo = Session.DAppInfo(peerId: UUID().uuidString, peerMeta: clientMeta)
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client = Client(delegate: self, dAppInfo: dAppInfo)
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print("WalletConnect URL: \(wcUrl.absoluteString)")
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try! client.connect(to: wcUrl)
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return wcUrl.absoluteString
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}
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func reconnectIfNeeded() {
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if let oldSessionObject = UserDefaults.standard.object(forKey: sessionKey) as? Data,
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let session = try? JSONDecoder().decode(Session.self, from: oldSessionObject) {
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client = Client(delegate: self, dAppInfo: session.dAppInfo)
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try? client.reconnect(to: session)
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}
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}
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// https://developer.apple.com/documentation/security/1399291-secrandomcopybytes
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private func randomKey() throws -> String {
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var bytes = [Int8](repeating: 0, count: 32)
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let status = SecRandomCopyBytes(kSecRandomDefault, bytes.count, &bytes)
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if status == errSecSuccess {
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return Data(bytes: bytes, count: 32).toHexString()
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} else {
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// we don't care in the example app
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enum TestError: Error {
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case unknown
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}
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throw TestError.unknown
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}
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}
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}
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extension WalletConnect: ClientDelegate {
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func client(_ client: Client, didFailToConnect url: WCURL) {
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delegate.failedToConnect()
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}
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func client(_ client: Client, didConnect url: WCURL) {
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// do nothing
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}
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func client(_ client: Client, didConnect session: Session) {
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self.session = session
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print("session+++___++_\(session.url)")
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let sessionData = try! JSONEncoder().encode(session)
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UserDefaults.standard.set(sessionData, forKey: sessionKey)
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delegate.didConnect()
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}
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func client(_ client: Client, didDisconnect session: Session) {
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UserDefaults.standard.removeObject(forKey: sessionKey)
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delegate.didDisconnect()
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}
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func client(_ client: Client, didUpdate session: Session) {
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// do nothing
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}
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}
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