RobinLinus

Covenants with CAT and ECDSA

In his article, CAT and Schnorr Tricks I, Andrew Poelstra showed how to emulate OP_CHECKSIGFROMSTACK-like covenants using only OP_CATand Schnorr signatures.

Here, we show that a similar trick is possible to emulate covenants using only OP_CAT and ECDSA signatures.

The High-Level Idea

Recall the ECDSA Signature Equation

paulkernfeld

BurnName: simple decentralized username registration

BTW, this is implemented as burn-name and burn-name-writer.

BurnName is a proposal for a simple and practical decentralized name registration system. In BurnName, users burn bitcoins to bid for names. The user who bids the most for a name owns that name, after a delay. BurnName uses the existing Bitcoin blockchain and network, and it can be used by various applications.

Example applications

• GitTorrent or a similar "decentralized GitHub"
• Domain name registration: your username doubles as a domain name
• Human-memorable Bitcoin addresses: map from your username to your Bitcoin address