Who proposed the OP_RETURN limit removal (i.e., who kicked off this change)?
The proposal to remove the long-standing ~80‑byte limit on Bitcoin’s OP_RETURN was initially authored by Peter Todd, a longtime Bitcoin developer. He filed the original pull request (#32359) and argued it was outdated, inefficient, and encouraged harmful workarounds like UTXO-spamming outputs. His idea was to simplify Bitcoin’s code and better support sidechains, timestamping, and bridge use cases .
This concept was further backed and advanced by Antoine Poinsot of Chaincode Labs, who submitted another pull request that helped push the change forward in the Core codebase .
After extensive discussion and revisions, the final merge—PR #32406—was authored by Greg Sanders, with contributions from others (including Peter Todd and Gloria Zhao). Sanders highlighted benefits like a “cleaner UTXO set” and “more consistent default behavior” . Gloria Zhao also provided public updates explaining the rationale behind the decision .
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