Key Takeaways
- Bitcoin Core will take away the 80-byte OP_RETURN information restrict in its subsequent launch.
- The change has been criticized for missing group consensus.
- Supporters say it improves community consistency and reduces dangerous workarounds.
Bitcoin Core builders have determined to get rid of the long-standing 80-byte restrict on OP_RETURN outputs within the upcoming software program launch, permitting extra arbitrary information to be added to transactions.
The choice, introduced by Bitcoin developer Greg Sanders on GitHub on Might 5, follows proposal PR 32359 authored by Peter Todd at Chaincode Labs’ request.
Function & affect of OP_RETURN
The OP_RETURN operate lets customers retailer non-spendable information straight on the blockchain.
Initially capped to discourage overuse of block area, the restrict has change into ineffective as customers adopted workarounds like pretend output addresses, which some builders argue are worse for the community.
Sanders wrote:
Giant-data inscriptions are taking place regardless. The cap merely channels them into extra opaque types that trigger injury to the community.
Targets of the change
The change goals to enhance consistency throughout nodes, create a cleaner UTXO set, and higher replicate how the Bitcoin community is definitely getting used.
The three choices thought of had been protecting, elevating, or eradicating the cap—builders finally selected full elimination after what Sanders described as…
… broad, although not maybe unanimous, assist.
Controversy & criticism
The transfer has been controversial.
Critics like Samson Mow argue the change lacks consensus and encourages non-financial makes use of of Bitcoin.
Mow mentioned on Might 5:
Customers can refuse to improve and keep on 29.0 or run one other implementation.
Bitcoin Core has introduced they may take away the OP_RETURN restrict of their subsequent launch. Many customers discover this to be an undesirable change for plenty of causes. You possibly can refuse to improve and keep on 29.0 or run one other implementation like @BitcoinKnots. https://t.co/WcUTOA5HQf
— Samson Mow (@Excellion) Might 5, 2025
Marty Bent of Ten31 Fund, pointing to rising frustration in regards to the course of and transparency of the choice, added:
There isn’t any consensus in the meanwhile on this OP_RETURN situation.
I feel one factor is fairly clear, there isn’t any consensus in the meanwhile on this OP_RETURN situation.
— Marty Bent (@MartyBent) Might 5, 2025