Bitcoin Core, the dominant software powering roughly 80% of all BTC nodes, has rolled out its long-awaited v30.0 update.
The update, published on Oct. 11, brings optional encrypted node connections, performance and fee optimizations, and several bug fixes.
Yet the change to OP_RETURN, Bitcoin’s built-in “data graffiti wall,” has triggered the loudest response.
What Changed in OP_RETURN?
OP_RETURN allows users to attach metadata such as text, images, or digital signatures to Bitcoin transactions without affecting their monetary function. Until now, each OP_RETURN output could carry up to 80 bytes of data, keeping non-financial use cases constrained.
The new release expands that limit to 100,000 bytes and allows multiple OP_RETURN outputs per transaction to be relayed and mined by default.
In practice, that means node operators running v30 can now process transactions embedding larger or more complex data structures from NFT-style inscriptions to application metadata without manual
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