Max Hillebrand on Nostr: One really cool usecase of Wabisabi coinjoin is that you can receive bitcoin without ...

One really cool usecase of Wabisabi coinjoin is that you can receive bitcoin without revealing your address to the sender.

The sender registers his inputs at the coinjoin coordinator and receives the Wabisabi credential. He consolidates or splits his credentials to be the exact payment amount, and then gives the receiver that Wabisabi credential.

The receiver now can consolidate or split this credential to any arbitrary value, and later register his output address and credential directly with the coordinator.

The sender will only sign the coinjoin transaction if the receiver confirms that his desired outputs are included.

When all inputs sign the transaction and it gets confirmed on the blockchain, the receiver considers the payment complete and hands over the goods.

There are hundreds of other inputs and outputs, and the coordinator doesn't know that the wabisabi credential was transfered among users. Both the sender and receiver can even batch multiple payments into this coinjoin without linking common ownership of inputs or outputs.