Mitra: support Ethereum login

app/soapbox/actions/auth.js

@@ -213,6 +213,34 @@ export function logIn(intl, username, password) {
   };
 }
 
+export function ethereumLogin() {
+  return (dispatch, getState) => {
+    const { ethereum } = window;
+    const loginMessage = getState().getIn(['instance', 'login_message']);
+
+    return ethereum.request({ method: 'eth_requestAccounts' }).then(walletAddresses => {
+      const [walletAddress] = walletAddresses;
+
+      return ethereum.request({ method: 'personal_sign', params: [loginMessage, walletAddress] }).then(signature => {
+        const params = {
+          grant_type: 'ethereum',
+          wallet_address: walletAddress.toLowerCase(),
+          password: signature,
+          redirect_uri: 'urn:ietf:wg:oauth:2.0:oob',
+          scope: getScopes(getState()),
+        };
+
+        // Note: skips app creation
+        // TODO: add to quirks.js for Mitra
+        return dispatch(obtainOAuthToken(params)).then(token => {
+          dispatch(authLoggedIn(token));
+          return dispatch(verifyCredentials(token.access_token));
+        });
+      });
+    });
+  };
+}
+
 export function logOut(intl) {
   return (dispatch, getState) => {
     const state = getState();

app/soapbox/features/auth_login/components/login_form.js

@@ -15,11 +15,10 @@ const messages = defineMessages({
 
 const mapStateToProps = state => {
   const instance = state.get('instance');
-  const features = getFeatures(instance);
 
   return {
     baseURL: getBaseURL(state),
-    hasResetPasswordAPI: features.resetPasswordAPI,
+    features: getFeatures(instance),
   };
 };
 
@@ -28,7 +27,7 @@ export default @connect(mapStateToProps)
 class LoginForm extends ImmutablePureComponent {
 
   render() {
-    const { intl, isLoading, handleSubmit, baseURL, hasResetPasswordAPI } = this.props;
+    const { intl, isLoading, handleSubmit, baseURL, features } = this.props;
 
     return (
       <form className='simple_form new_user' method='post' onSubmit={handleSubmit}>
@@ -57,12 +56,8 @@ class LoginForm extends ImmutablePureComponent {
               autoCapitalize='off'
               required
             />
-            {/* <div className='input password user_password'>
-              <input
-              />
-            </div> */}
             <p className='hint subtle-hint'>
-              {hasResetPasswordAPI ? (
+              {features.resetPasswordAPI ? (
                 <Link to='/auth/reset_password'>
                   <FormattedMessage id='login.reset_password_hint' defaultMessage='Trouble logging in?' />
                 </Link>

app/soapbox/features/auth_login/components/login_page.js

@@ -4,18 +4,25 @@ import { injectIntl } from 'react-intl';
 import { connect } from 'react-redux';
 import { Redirect } from 'react-router-dom';
 
+import { ethereumLogin } from 'soapbox/actions/auth';
 import { logIn, verifyCredentials, switchAccount } from 'soapbox/actions/auth';
 import { fetchInstance } from 'soapbox/actions/instance';
+import { getFeatures } from 'soapbox/utils/features';
 import { isStandalone } from 'soapbox/utils/state';
 
 import LoginForm from './login_form';
 import OtpAuthForm from './otp_auth_form';
 
-const mapStateToProps = state => ({
-  me: state.get('me'),
-  isLoading: false,
-  standalone: isStandalone(state),
-});
+const mapStateToProps = state => {
+  const instance = state.get('instance');
+
+  return {
+    me: state.get('me'),
+    isLoading: false,
+    standalone: isStandalone(state),
+    features: getFeatures(instance),
+  };
+};
 
 export default @connect(mapStateToProps)
 @injectIntl
@@ -62,8 +69,18 @@ class LoginPage extends ImmutablePureComponent {
     event.preventDefault();
   }
 
+  handleEthereumLogin = e => {
+    const { dispatch } = this.props;
+
+    dispatch(ethereumLogin())
+      .then(() => this.setState({ shouldRedirect: true }))
+      .catch(console.error);
+
+    e.preventDefault();
+  };
+
   render() {
-    const { standalone } = this.props;
+    const { standalone, features } = this.props;
     const { isLoading, mfa_auth_needed, mfa_token, shouldRedirect } = this.state;
 
     if (standalone) return <Redirect to='/auth/external' />;
@@ -72,7 +89,11 @@ class LoginPage extends ImmutablePureComponent {
 
     if (mfa_auth_needed) return <OtpAuthForm mfa_token={mfa_token} />;
 
-    return <LoginForm handleSubmit={this.handleSubmit} isLoading={isLoading} />;
+    if (features.ethereumLogin) {
+      return <button onClick={this.handleEthereumLogin}>Log in with Ethereum</button>;
+    } else {
+      return <LoginForm handleSubmit={this.handleSubmit} isLoading={isLoading} />;
+    }
   }
 
 }

app/soapbox/utils/features.js

@@ -9,6 +9,7 @@ const any = arr => arr.some(Boolean);
 // For uglification
 export const MASTODON = 'Mastodon';
 export const PLEROMA  = 'Pleroma';
+export const MITRA    = 'Mitra';
 
 export const getFeatures = createSelector([
   instance => parseVersion(instance.get('version')),
@@ -83,6 +84,7 @@ export const getFeatures = createSelector([
     accountEndorsements: v.software === PLEROMA && gte(v.version, '2.4.50'),
     quotePosts: v.software === PLEROMA && gte(v.version, '2.4.50'),
     birthdays: v.software === PLEROMA && gte(v.version, '2.4.50'),
+    ethereumLogin: v.software === MITRA,
   };
 });