1. general

Opcode which marks output as invalid and writes data to the chain. Useful for building onchain protocols to extend bitcoin.

Since arbitrary data can be put into OP_RETURN, it is very useful for building on-chain systems to extend the bitcoin functionality. Many token schemes and social media platforms are appearing which use OP_RETURN to power exciting use-cases.

* All terms and definitions may update as the Cryptionary improves.