@reown/appkit-siwe-react-native/lib/module/controller/SIWEController.js

#### 🔎 [Examples](https://github.com/reown-com/react-native-examples)

import { proxy, ref, subscribe as sub } from 'valtio';
import { subscribeKey as subKey } from 'valtio/utils';
import { OptionsController } from '@reown/appkit-core-react-native';

// -- Types --------------------------------------------- //

// -- State --------------------------------------------- //
const state = proxy({
  status: 'uninitialized'
});

// -- Controller ---------------------------------------- //
export const SIWEController = {
  state,
  subscribeKey(key, callback) {
    return subKey(state, key, callback);
  },
  subscribe(callback) {
    return sub(state, () => callback(state));
  },
  _getClient() {
    if (!state._client) {
      throw new Error('SIWEController client not set');
    }
    return state._client;
  },
  async getNonce(address) {
    const client = this._getClient();
    const nonce = await client.getNonce(address);
    this.setNonce(nonce);
    return nonce;
  },
  async getSession() {
    try {
      const client = this._getClient();
      const session = await client.getSession();
      if (session?.address && session?.chainId) {
        this.setSession(session);
        this.setStatus('success');
      } else {
        this.setSession(undefined);
        this.setStatus('ready');
      }
      return session;
    } catch {
      return undefined;
    }
  },
  createMessage(args) {
    const client = this._getClient();
    const message = client.createMessage(args);
    this.setMessage(message);
    return message;
  },
  async verifyMessage(args) {
    const client = this._getClient();
    const isValid = await client.verifyMessage(args);
    return isValid;
  },
  async signIn() {
    try {
      this.setStatus('loading');
      const client = this._getClient();
      const session = await client.signIn();
      this.setStatus('success');
      return session;
    } catch (error) {
      this.setStatus('error');
      throw error;
    }
  },
  async signOut() {
    const client = this._getClient();
    await client.signOut();
    this.setStatus('ready');
    this.setSession(undefined);
    client.onSignOut?.();
  },
  onSignIn(args) {
    const client = this._getClient();
    client.onSignIn?.(args);
  },
  onSignOut() {
    const client = this._getClient();
    client.onSignOut?.();
  },
  setSIWEClient(client) {
    state._client = ref(client);
    state.status = 'ready';
    OptionsController.setIsSiweEnabled(client.options.enabled);
  },
  setNonce(nonce) {
    state.nonce = nonce;
  },
  setStatus(status) {
    state.status = status;
  },
  setMessage(message) {
    state.message = message;
  },
  setSession(session) {
    state.session = session;
    state.status = session ? 'success' : 'ready';
  }
};
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