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bitcoin core – Tx with OP_RETURN with 78 bytes of information refused by node


A transaction with a 78 bytes OP_RETURN is refused, however with shorter information (e.g. 74 bytes) is accepted, though as much as 80 bytes ought to work.

What’s the secure restrict for use?

Per these references the utmost size is 80 bytes (83 for entire script) (since v 0.11):

https://stackoverflow.com/questions/24845429/maximum-size-of-data-bitcoin-op-return-tx-can-handle
https://developer.bitcoin.org/devguide/transactions.html#null-data

The beneath transaction produces error: {"error":"-26: scriptpubkey"}.
Comparable transactions with barely shorter OP_RETURN are positive.

01000000000102ae5c4a7139f0f47cf4bf431d99f110e73d2cd7e03faae56d56d7c09db3ee3c400100000000fbffffffc8ab005126b7b871d7c9621789de87282f4cd13e851fd286b0e5aae02e21c0b90000000000faffffff0350c30000000000001600146f26d2633d5307d9c4b1ca5b4c282201bae4ab144e15000000000000160014bb5bb9b9a07718bd0bfeef385f6a184787b584da00000000000000004f6a4d535741503a424e422e425553443a626e62317368366e757a7474336463657679346e676d7a746b7061706e76787179376a653074307564723a3635383137323831393a74656d7963683a3330300247304402200ca03ef0f249471dbee806b0961892c7141339460a5890479fdbebd3ec06ce8d02201a2275d54849f660ba01cd2799c0ac57a4bfca6d21115ddeecf63ebfd71898df0121034df96f5dacf5e22fb8611e6863e48f6777c7e96064c81196e23dcefd35017d0e02483045022100987199ff71731d44520bc1ed3704a6a66725ea890479ea5078b6b89ebb854d8402202dd52791a28c9d28c1672785765aab811b1549a1ec031f7c15a4ee472e70c4200121034df96f5dacf5e22fb8611e6863e48f6777c7e96064c81196e23dcefd35017d0e00000000

{
    "data_hex": "535741503a ...",
    "script": "6a4d535741503a ...",
    "script_type": "null-data",
    "worth": 0
}

Observe: use case is shopper for thorswap.finance cross-chain DEX.

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