diff --git a/web/account/siwe.react.js b/web/account/siwe.react.js
index 800e53a3a..d8edf0cb6 100644
--- a/web/account/siwe.react.js
+++ b/web/account/siwe.react.js
@@ -1,170 +1,217 @@
 // @flow
 
 import '@rainbow-me/rainbowkit/dist/index.css';
 
 import {
   ConnectButton,
   darkTheme,
   getDefaultWallets,
   RainbowKitProvider,
   useConnectModal,
 } from '@rainbow-me/rainbowkit';
+import invariant from 'invariant';
 import _merge from 'lodash/fp/merge';
 import * as React from 'react';
 import { FaEthereum } from 'react-icons/fa';
 import {
   chain,
   configureChains,
   createClient,
+  useAccount,
   useSigner,
   WagmiConfig,
 } from 'wagmi';
 import { alchemyProvider } from 'wagmi/providers/alchemy';
 import { publicProvider } from 'wagmi/providers/public';
 
 import {
   getSIWENonce,
   getSIWENonceActionTypes,
+  siweAuth,
+  siweAuthActionTypes,
 } from 'lib/actions/siwe-actions';
 import { createLoadingStatusSelector } from 'lib/selectors/loading-selectors';
+import type { LogInStartingPayload } from 'lib/types/account-types.js';
 import {
   useDispatchActionPromise,
   useServerCall,
 } from 'lib/utils/action-utils';
-import { siweMessageSigningExplanationStatements } from 'lib/utils/siwe-utils.js';
+import {
+  createSIWEMessage,
+  siweMessageSigningExplanationStatements,
+  siweStatementWithoutPublicKey,
+} from 'lib/utils/siwe-utils.js';
 
 import Button from '../components/button.react';
 import LoadingIndicator from '../loading-indicator.react';
 import { useSelector } from '../redux/redux-utils';
+import { webLogInExtraInfoSelector } from '../selectors/account-selectors.js';
 import css from './siwe.css';
 
 // details can be found https://0.6.x.wagmi.sh/docs/providers/configuring-chains
 const availableProviders = process.env.COMM_ALCHEMY_KEY
   ? [alchemyProvider({ apiKey: process.env.COMM_ALCHEMY_KEY })]
   : [publicProvider()];
 const { chains, provider } = configureChains(
   [chain.mainnet],
   availableProviders,
 );
 
 const { connectors } = getDefaultWallets({
   appName: 'comm',
   chains,
 });
 
 const wagmiClient = createClient({
   autoConnect: true,
   connectors,
   provider,
 });
 
 const getSIWENonceLoadingStatusSelector = createLoadingStatusSelector(
   getSIWENonceActionTypes,
 );
 function SIWE(): React.Node {
   const { openConnectModal } = useConnectModal();
+  const { address } = useAccount();
   const { data: signer } = useSigner();
   const dispatchActionPromise = useDispatchActionPromise();
   const getSIWENonceCall = useServerCall(getSIWENonce);
   const getSIWENonceCallLoadingStatus = useSelector(
     getSIWENonceLoadingStatusSelector,
   );
+  const siweAuthCall = useServerCall(siweAuth);
+  const logInExtraInfo = useSelector(webLogInExtraInfoSelector);
 
   const [siweNonce, setSIWENonce] = React.useState<?string>(null);
 
   React.useEffect(() => {
     if (!signer) {
       setSIWENonce(null);
       return;
     }
     dispatchActionPromise(
       getSIWENonceActionTypes,
       (async () => {
         const response = await getSIWENonceCall();
         setSIWENonce(response);
       })(),
     );
   }, [dispatchActionPromise, getSIWENonceCall, signer]);
 
   const siweButtonColor = React.useMemo(
     () => ({ backgroundColor: 'white', color: 'black' }),
     [],
   );
 
+  const callSIWEAuthEndpoint = React.useCallback(
+    (message: string, signature: string, extraInfo) =>
+      siweAuthCall({
+        message,
+        signature,
+        ...extraInfo,
+      }),
+    [siweAuthCall],
+  );
+
+  const attemptSIWEAuth = React.useCallback(
+    (message: string, signature: string) => {
+      const extraInfo = logInExtraInfo();
+      dispatchActionPromise(
+        siweAuthActionTypes,
+        callSIWEAuthEndpoint(message, signature, extraInfo),
+        undefined,
+        ({ calendarQuery: extraInfo.calendarQuery }: LogInStartingPayload),
+      );
+    },
+    [callSIWEAuthEndpoint, dispatchActionPromise, logInExtraInfo],
+  );
+
+  const onSignInButtonClick = React.useCallback(async () => {
+    invariant(siweNonce, 'nonce must be present during SIWE attempt');
+    const message = createSIWEMessage(
+      address,
+      siweStatementWithoutPublicKey,
+      siweNonce,
+    );
+    const signature = await signer.signMessage(message);
+    attemptSIWEAuth(message, signature);
+  }, [address, attemptSIWEAuth, signer, siweNonce]);
+
   let siweLoginForm;
   if (signer && !siweNonce) {
     siweLoginForm = (
       <div className={css.connectButtonContainer}>
         <LoadingIndicator
           status={getSIWENonceCallLoadingStatus}
           size="medium"
         />
       </div>
     );
   } else if (signer) {
     siweLoginForm = (
       <div className={css.siweLoginFormContainer}>
         <div className={css.connectButtonContainer}>
           <ConnectButton />
         </div>
         <p>{siweMessageSigningExplanationStatements[0]}</p>
         <p>{siweMessageSigningExplanationStatements[1]}</p>
-        <Button variant="filled" type="submit" onClick={undefined}>
+        <Button variant="filled" onClick={onSignInButtonClick}>
           Sign in
         </Button>
       </div>
     );
   }
 
   const onSIWEButtonClick = React.useCallback(() => {
     openConnectModal && openConnectModal();
   }, [openConnectModal]);
 
   let siweButton;
   if (openConnectModal) {
     siweButton = (
       <>
         <Button
           onClick={onSIWEButtonClick}
           variant="filled"
           buttonColor={siweButtonColor}
         >
           <div className={css.ethereumLogoContainer}>
             <FaEthereum />
           </div>
           Sign in with Ethereum
         </Button>
       </>
     );
   }
   return (
     <div className={css.siweContainer}>
       <hr />
       {siweLoginForm}
       {siweButton}
     </div>
   );
 }
 
 function SIWEWrapper(): React.Node {
   const theme = React.useMemo(() => {
     return _merge(darkTheme())({
       radii: {
         modal: 0,
         modalMobile: 0,
       },
       colors: {
         modalBackdrop: '#242529',
       },
     });
   }, []);
   return (
     <WagmiConfig client={wagmiClient}>
       <RainbowKitProvider chains={chains} theme={theme} modalSize="compact">
         <SIWE />
       </RainbowKitProvider>
     </WagmiConfig>
   );
 }
 
 export default SIWEWrapper;