Using Eve.
Start to finish.

Eve sends private notes between Robinhood Chain wallets. There is nothing to install and no account to make. This page covers every screen. For the cryptography underneath, read the protocol.

01Quick start

1. Open the app and press Connect wallet. Pick your wallet from the list.
2. Press Unlock inbox and approve the signature requests in your wallet. The first visit asks for two. Every later visit asks for one.
3. In Compose, paste the recipient's wallet address, write your note and press send.

That is the whole flow. Nothing costs gas and no transaction is ever sent. If your wallet ever shows a transaction or a token approval while using Eve, reject it: Eve only asks for message signatures.

02The two signatures

Wallets can sign, but they cannot decrypt messages for a website. So Eve builds your private inbox keys out of a signature.

• "Unlock your private keys" is asked every time you unlock on a new tab or device. Your browser turns this signature into your private Eve keys. It stays in your browser. It is never sent to us. Only ever sign this message on the real Eve site, because anyone holding that signature could read your notes.
• "Publish your public keys" is asked once, on your first visit. It is a public statement that links your wallet to your Eve public keys, so senders can prove they are encrypting to you and not to an impostor.

The same wallet always produces the same keys, so there is nothing to back up. Open Eve anywhere, sign once, and your inbox is there.

03Sending a note

Paste any wallet address in the To field. The line under it tells you what will happen:

• Keys verified. The recipient already uses Eve. Your browser checked their published keys against their wallet signature. The note is delivered to their inbox instantly.
• No Eve keys yet. The wallet has never used Eve. You can still send. The note will be sealed until they show up.
• Note to self. You entered your own address. Only your wallet can open it.
• Failed verification. The keys on file for that wallet were not signed by that wallet. Eve blocks the send. This should never happen in normal use.

Notes can be up to 5,000 words. The counter under the text box turns red past the limit and sending is disabled until you trim it. After you send, the note appears in your Sent tab, where you can reread it, see whether it has been opened, or unsend it.

04Writing to a wallet that has never used Eve

This is the part most encrypted messengers cannot do. If the recipient has no keys yet, your browser locks the note with a one-time key that only your device holds. We store the locked note against their address and we never have the key. The key then reaches them in one of two ways.

• Private link (instant). After sending you get a link. The key is the part after the #, which browsers never send to any server. Give the link to the recipient over a channel you trust. When they open it, connect the right wallet and unlock, the note opens and is filed in their inbox for good. You can copy the link again any time from the note in your Sent tab.
• Automatic handoff (no link). Just tell them to visit Eve. Once they have unlocked an inbox, your browser passes them the key the next time you have Eve open. It takes a few seconds and shows a confirmation at the bottom of your screen.

If you are the recipient and your inbox shows a note marked Sealed, it means the sender wrote to you before you had keys. Nothing is wrong. Ask them for the private link, or ask them to open Eve once. You do not need to do anything else.

A private link only works for the wallet the note was addressed to. Someone who intercepts the link cannot open it with a different wallet.

05Reading notes

Your Inbox lists notes addressed to your wallet, newest first, with a short preview that is decrypted in your browser. A green dot means unread. Opening a note shows:

• From and To, as full wallet addresses.
• Integrity. "Sender signature verified" means the note was signed by keys that the sender's wallet vouched for. If it ever says the sender could not be verified, do not trust who the note claims to be from.
• Reply opens Compose with their address filled in. Delete removes the note from our database for both sides.

06Burn after reading

Switch on Burn after reading before you send and the note is erased from our database the moment the recipient opens it. They see it once, with a warning to copy anything they need. It disappears from your Sent tab too. The switch resets after every send, so it never carries over to your next note by accident.

07Notes to self

Press Note to self in Compose to address a note to your own wallet. It is encrypted exactly like any other note and only your wallet can open it, which makes it a simple private vault for things like reminders, drafts or recovery hints that follows you to any browser.

08Wallets and devices

• Desktop. Any browser wallet extension works: MetaMask, Rabby, Coinbase Wallet and others appear automatically in the connect window.
• Mobile. Open Eve inside your wallet app's built-in browser.
• Network. Eve asks your wallet to add Robinhood Chain if it is missing. Signing works even if you decline.
• New device. Connect the same wallet and sign once. Same keys, same inbox.
• Not supported yet. Smart contract wallets and any signer that gives a different signature each time, because stable keys cannot be derived from them.
• Signing out wipes your keys from the tab. Closing the tab does the same.

09What we can and cannot see

We cannot see the text of any note, the keys that open it, or the signature your keys come from. None of them ever reach our servers.

We can see the sender address, the recipient address, the time, the padded size of the encrypted note, and whether it has been opened. If that metadata matters for your situation, use a fresh wallet.

There is no recovery. If you lose the wallet, the notes are unreadable forever, to you and to us.

10Troubleshooting

• "This note is sealed to you". The sender has the key and has not been online since you joined. Ask for the private link or ask them to open Eve. See section 04.
• "No note here for this wallet". You are connected with a different wallet than the note was addressed to, or the note was burned or unsent. Switch wallets in your wallet app and reload.
• "This link is missing its key". The part after the # was cut off, often by a chat app. Ask the sender to copy the link again from their Sent tab.
• "This wallet produced different keys than last time". You are using a different wallet app or hardware signer than the one you first unlocked with, and it signs differently. Go back to the original.
• No wallet in the connect window. Install a wallet extension, or on mobile open the site from inside your wallet app.
• "Signature cancelled". You rejected the request in your wallet. Press Unlock again. Nothing was shared.

11Contract address

Using Eve never requires a token, an approval or a payment. When an official Eve contract exists, its address will appear here, in the site footer and on the home page, and nowhere else first. Treat any address you find elsewhere as fake.