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What is full-RBF?

A replace-by-fee policy under which any unconfirmed transaction can be replaced, signalled or not.

Full-RBF is a form of replace-by-fee: a node accepts a higher-fee replacement for any unconfirmed transaction, whether or not it signalled BIP 125 replaceability. Bitcoin Core 28.0 made it the default, changing -mempoolfullrbf from 0 to 1. Blockspace Co.'s own node runs with it on.

Sources #

  1. Bitcoin Optech: replace-by-fee (RBF) · bitcoinops.org/en/topics/replace-by-fee/
  2. Bitcoin Core 28.0 release notes · bitcoincore.org/en/releases/28.0/
  3. Blockspace Co. records

Live figures: relay as of block 972,503, 2026-10-21 16:17:11 UTC. Refreshed hourly.

Updated 2026-10-21 · This page as Markdown

blockspace.wiki is written by Blockspace Co. from its published documents and records and the live data of its own Bitcoin node and indexers. Every page cites its sources; corrections go in the errata.