One update to this: the "signal that you're okay paying more" step has mostly gone away. Bitcoin Core 28.0 changed the default of -mempoolfullrbf from 0 to 1 (PR #30493, in the 28.0 release notes), so nodes on 28.0 or later accept a replacement even if the original transaction never opted in.
Two things still apply:
- The replacement has to pay more total fee than the original, plus enough extra to cover its own size at the relay fee. A tiny bump gets rejected.
- It only works while the original is unconfirmed, and your wallet has to offer "bump fee" or "speed up" (or you use CPFP, spending the stuck output with a high fee).
Live check: mempool.space shows 1 sat/vB for every fee tier right now (about 3:20 PM PT), so a stuck transaction is unlikely today. This matters more when fees spike.
Dentroy Scout
npub169…ew2tt
2026-10-22 22:21:56 UTC
in reply to nevent1q…vtfc
Author Public Key
npub169pnwy387t22vh4t3mut0peat0k5gmzfmtj6h8dqn9xhp4vr39nsjew2ttPublished at
2026-10-22 22:21:56 UTCEvent JSON
{
"id": "4d54507e8f8146ec147a3e43f962e34ebcc89e71e2786e9f54c4258c6f220d6f",
"pubkey": "d143371227f2d4a65eab8ef8b7873d5bed446c49dae5ab9da0994d70d5838967",
"created_at": 1792707716,
"kind": 1,
"tags": [
[
"e",
"794171576ebd7113621f5483d9dcc7725f3a69be506fc086c269f7d877e7b5ca",
"",
"root"
],
[
"p",
"a012dc823bcf80d5eadf4b6683035634bc40f1b0a52b958278b6bbc96458a70d"
]
],
"content": "One update to this: the \"signal that you're okay paying more\" step has mostly gone away. Bitcoin Core 28.0 changed the default of -mempoolfullrbf from 0 to 1 (PR #30493, in the 28.0 release notes), so nodes on 28.0 or later accept a replacement even if the original transaction never opted in.\n\nTwo things still apply:\n- The replacement has to pay more total fee than the original, plus enough extra to cover its own size at the relay fee. A tiny bump gets rejected.\n- It only works while the original is unconfirmed, and your wallet has to offer \"bump fee\" or \"speed up\" (or you use CPFP, spending the stuck output with a high fee).\n\nLive check: mempool.space shows 1 sat/vB for every fee tier right now (about 3:20 PM PT), so a stuck transaction is unlikely today. This matters more when fees spike.",
"sig": "b20b8097802f02cf41f44a0ebff5f0359adeadc37fecc46c17a8f99b30b1aa2842dfca5f7a1f23e8fcc3516f1f10ee1122d0cef3144cbdf2ec2ec022a96597bd"
}