How to modify fixed bitcoin transactions: Solutions and tips (RBF & CPFP description) | By Lucien Bourdon | February 2025

What is Satoshi?

Satoshi (SAT) is the smallest unit of Bitcoin.

• 1 Satoshi = 0.00 001 BTC
• Bitcoin transaction fees are measured SATOSHIS (SAT/VB) per virtual byte -The higher the SAT/VB, the faster it means.

What does SAT/VB mean?

• SAT/VB = Satoshis per virtual byte (Transaction cost).
• The fee is Transaction sizeIt is not the amount of Bitcoin sent.
• The higher the fee (SAT/VB), the more likely the miner is to prioritize the transaction.

How long does Bitcoin transactions take?

Bitcoin transactions are usually checked within 10-60 minutesBut it depends on Fee, network congestion and transaction size. Advanced transactions are confirmed faster, but low commission transactions may occur Several hours or days If the network is busy. You can speed up using confirmation RBF or CPFP If necessary.

How long should I wait before taking action?

If the transaction is not confirmed Several hours And the fee is still high and consider using it. RBF or CPFP.

I am waiting if the network is less busy 12-24 hours It can be enough.

Can I cancel Bitcoin transactions?

No, Bitcoin transaction Cannot cancel Once they are broadcasted on the network.
However, when the transaction is displayed “Replace” (RBF available)You can replace it with A More commission transactions Or send to another address. This effectively ignores the original transaction.

What is RBF (Replace-by-Fee)?

RBF allows you Replace unidentified transactions A Bar higher commission version To speed up the confirmation.

• It works only when the RBF is activated when the transaction is transmitted.
• Trezor Suite by default activates RBF.

How much does your child cost for CPFP?

CPFP allows you Spend a transaction that is not confirmed with higher feesTherefore, the miner checks both at the same time.

• If you receive Bitcoin, use CPFP I want to speed up with low fees.
• If you send Bitcoin, but you can’t use RBF, CPFP can work. If not confirmed Output change Can be used.

What is Mempool and what is mempool.space?

no way Mempool (In the case of “memory pool”) is a temporary holding area waiting before the unidentified bitcoin transaction is added to the block. Each bitcoin node has its own Members, and the miner Priority of fees -The advanced transaction is confirmed first.

mempool.space A Block explorer It allows you Bitcoin Network Mempool in real timeIncluding the current commission estimation and transaction status. It is a useful tool to confirm that the transaction will soon be confirmed.

Other Bitcoin block explorers are:

tip: To track a specific transaction txid In Trezor Suite, paste it into a block explorer like Mempool.Space or Trezor ‘S Explorer.

What is Mempool Accelerator ™?

Mempool Accelerator ™ is a third -party service Pay directly to the miner Check the deal faster.

• Even if you are Not the sender or recipient of the transaction.
• It is useful if RBF or CPFP is not an option.
• Always check the service Terms of Use Before use.

For more information, please visit Mempool Accelerator page.

Does RBF and CPFP only apply to Bitcoin?

No, these technologies also work other technologies UXO base Including cryptocurrencies:

• Bitcoin (BTC)
• Litecoin (LTC)
• Bitcoin Cash (BCH)
• Bitcoin SV (BSV)
• Dogecoin (DOGE)

For Ether Leeum and similar blockchainThe fee bumping usually works differently by increasing. Gas price The transaction of withholding.