Segwit | Replace-by-Fee

Segwit Addresses

What are segwit addresses? Transactions that spend bitcoins secured by segregated witness (segwit) use less block weight than equivalent non-segwit (legacy) transactions, allowing segwit transactions to pay less total fee to achieve the same feerate as legacy transactions.

Tested: version 1.1.10 on macOS

Tested on: 2019-12-19

Receive support

  • Does not allow receiving to P2SH-wrapped segwit
    Does not allow the generation of P2SH-wrapped (either P2WPKH or P2WSH) segwit receiving addresses.
  • Allows receiving to bech32 segwit addresses
    Allows the generation of bech32 native (either P2WPKH or P2WSH) segwit receiving addresses.
  • Default receiving address is bech32 P2WPKH
    This service generates bech32 P2WPKH segwit receiving addresses by default.

Send support

  • Allows sending to bech32 P2WPKH addresses
    Allows sending to bech32 P2WPKH native segwit addresses.
  • Allows sending to bech32 P2WSH addresses
    Allows sending to bech32 P2WSH native segwit addresses.
  • Creates bech32 change addresses
    When sending, generates bech32 (either P2WPKH or P2WSH) segwit change addresses.

Usability

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Wasabi only generates bech32 receive addresses.
Wasabi only generates bech32 receive addresses.

Wasabi allows sending to any segwit v0 address.
Wasabi allows sending to any segwit v0 address.


Replace-by-Fee (RBF)

What is 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.

Tested: version 1.1.10 on macOS

Tested on: 2019-12-19

Receiving support

  • Notification notes RBF
    Notification of incoming transaction notes that the transaction signals RBF.
  • 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 transaction only
    Only the replacement transaction is shown in the transaction list. No original transaction is shown.

Sending support

  • Does not signal BIP125 replaceability 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.
  • Shows replacement transaction only
    Only the replacement transaction is shown in the transaction list. No original transaction is shown.

Usability

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Sending Transaction - Send transaction screen. No RBF options. Wasabi does signal for RBF randomly for 2% of transactions.
Sending Transaction - Send transaction screen. No RBF options. Wasabi does signal for RBF randomly for 2% of transactions.

Attempting Transaction Replacement - Transaction list screen showing sent transaction. No RBF bump options. Transaction not sent signaling RBF. While Wasabi does not support manual sending RBF signaling transactions, if a transaction replacement is done using the same seed in a different wallet, Wasabi shows only the replacement transaction in the transaction list.
Attempting Transaction Replacement - Transaction list screen showing sent transaction. No RBF bump options. Transaction not sent signaling RBF. While Wasabi does not support manual sending RBF signaling transactions, if a transaction replacement is done using the same seed in a different wallet, Wasabi shows only the replacement transaction in the transaction list.


Receiving Transaction Signaling RBF - Incoming RBF signaling transaction. No RBF flag.
Receiving Transaction Signaling RBF - Incoming RBF signaling transaction. No RBF flag.

Receiving Transaction Signaling RBF - Incoming RBF signaling transaction notification notes that a transaction is replaceable. Wasabi also displays whether the transaction was a replacement transaction.
Receiving Transaction Signaling RBF - Incoming RBF signaling transaction notification notes that a transaction is replaceable. Wasabi also displays whether the transaction was a replacement transaction.


Receiving Replacement Transaction - Replacement transaction replaces original transaction after transaction fee bump. No RBF indicator.
Receiving Replacement Transaction - Replacement transaction replaces original transaction after transaction fee bump. No RBF indicator.