Replace-by-Fee (RBF)

An unconfirmed transaction can be replaced by another version of the same transaction that spends the same inputs. Most full nodes support this if the earlier transaction enables BIP125 signaling and the replacement transaction increases the amount of fee paid. In terms of block chain space used, this is the most efficient form of fee bumping.

Receiving support

  • Notification does not note RBF
    Notification of incoming transaction does not note that the transaction is RBF signaling
  • Received transaction not labeled replaceable in list
    Does not visually indicate that an incoming transaction has signaled RBF
  • Received transaction not labeled replaceable in transaction details
    Does not visually indicate that a received transaction has signaled RBF when viewing the transaction details
  • Shows replacement and original transactions
    Both the original transaction and replacement transactions are shown in the transaction list

Sending support

  • Does not signal BIP125 replacability when sending transactions
    Does not allow sending of BIP125 opt-in-RBF transactions in the interface
  • Sent transaction not labeled replaceable in list
    Does not visually indicate that an outgoing transaction has signaled RBF
  • Sent transaction not labeled replaceable in transaction details
    Does not visually indicate that a sent transaction has signaled RBF when viewing the transaction details
  • No replacements in transaction list
    Because no transaction replacement is possible, we could not test whether original or replacement sent transactions are shown after replacement

Usability

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Sending RBF Transaction - Default Send screen. No option for RBF.
Sending RBF Transaction - Default Send screen. No option for RBF.

Sending RBF Transaction - Context menu for send transaction show mining fee options.
Sending RBF Transaction - Context menu for send transaction show mining fee options.

Sending RBF Transaction - Mining fee options dialog.
Sending RBF Transaction - Mining fee options dialog.

Sending RBF Transaction - Mining fee custom dialog.
Sending RBF Transaction - Mining fee custom dialog.

Bumping RBF Enabled Transaction - Mining fee custom dialog.
Bumping RBF Enabled Transaction - Mining fee custom dialog.

Receiving RBF Transaction - Receiving RBF enabled transaction. No RBF Flag.
Receiving RBF Transaction - Receiving RBF enabled transaction. No RBF Flag.

Receiving RBF Transaction - Transaction details for received RBF transaction. Links to blockchair.com explorer.
Receiving RBF Transaction - Transaction details for received RBF transaction. Links to blockchair.com explorer.

Receiving Bumped RBF Transaction - Transaction list with top 2 transactions being the original and bumped RBF transaction. No RBF flag. Note that the balance only went up by the value of one of the transactions.
Receiving Bumped RBF Transaction - Transaction list with top 2 transactions being the original and bumped RBF transaction. No RBF flag. Note that the balance only went up by the value of one of the transactions.