Project idea: Sending lumens to any address

jed

It would be cool if one of the wallets added a feature that allowed you to send lumens to an arbitrary email address.

This could be done without the wallet provider ever holding lumens.

The wallet would have to provide a federation service that maps email addresses to stellar accounts.
something like: bob@gmail.com*wallet.com

If the wallet server knows the account ID of the email you are sending to no problem the lumens just go as normal.

But if wallet.com hasn't seen the email before then:
1) It makes a new stellar account for the receiver.
2) Adds the sender key as a signer on the new stellar account.
3) Sends the lumens from the sender account to the receiver account.
4) Emails the receiver explaining how to claim their lumens.
5) That email also contains some code that allows them to associate their stellar account with their email so future payments will be seamless.
6) If the receiver never claims the lumens then the sender can pull them back and close the account (wallet should probably have a revoke transaction button in the UI somewhere)
7) If the receiver does claim the lumens it should remove the sender as a signer

ankurp

jed This is implemented in StellarFed project now: https://galactictalk.org/d/1484-stellar-federation-service-with-account-payment-notification-service

You can send payment to anyone using <email>*stellarfed.org and it will autogenerate an account and email a link with a secure token that lets the user view the public and secret key once only on the stellarfed.org website which is served using SSL. The secret key is also encrypted in the database to make it even more secure.

dzham

Step 2) is where this breaks down for me. The server doesn't know the address of the sender.

dzham

What I've found works for XLM, is the following

sender does federation lookup for emailaddress*wallet.com
recipient doesn't exist
	server creates a keypair, "escrow"
	server registers "escrow" account
	server returns escrow accountId to sender

sender creates tx:
	send payment to "escrow"

server sees incoming payment:
	adds sender as a signer to "escrow"

server sends email to recipient

recipient generates a keypair, "target"
recipient sends "target" accountId to server, using
	a challenge-response w/ a hash, that resolves to their email-address, as message, OR
	a simple web form

server
	creates new account "target", using "escrow" as funding account
	merges "escrow" into "server"

sacarlson

This project now does all that Jed was asking for except the UI to revoke funds at step 6 and we skip step 2. for step 6 at this time the sender has to manually come chat with funtracker.site to refund the money they sent with proof they sent the funds by signing something with the account that sent it ( or small transaction to prove). https://galactictalk.org/d/53-send-funds-to-email-anchor-site-federation-with-auto-account-creation-project/3. Works with sending any asset that the anchor supports and XLM.

ml31415

You might be interested in implmeenting OpenAlias, which aims for exactly that feature, to replace horribly hard to remember cryptocoin account names with emails or domain names: https://openalias.org/