{"id":41232,"date":"2021-04-22T14:11:28","date_gmt":"2021-04-22T11:11:28","guid":{"rendered":"https:\/\/forklog.com\/en\/?p=41232"},"modified":"2025-08-30T17:53:07","modified_gmt":"2025-08-30T14:53:07","slug":"in-one-click-speed-up-cancel-and-mix-bitcoin-transactions-in-blender-wallet","status":"publish","type":"post","link":"https:\/\/forklog.com\/en\/in-one-click-speed-up-cancel-and-mix-bitcoin-transactions-in-blender-wallet\/","title":{"rendered":"In One Click: Speed Up, Cancel and Mix Bitcoin Transactions in Blender Wallet"},"content":{"rendered":"

In September 2020, a user sent<\/a> 1 million USDT to the wrong address of the Swerve.Finance project. The funds were recovered: Tether froze the funds and issued new tokens.<\/p>\n

That scenario is impossible for Bitcoin: coins cannot be frozen or transactions removed from the blockchain. The error can be corrected before the transaction is added to the blockchain. For this, Bitcoin wallets include a Replace-By-Fee (RBF) feature.<\/p>\n

Together with the Blender Wallet cryptocurrency wallet, we explain how to cancel and accelerate a transaction in one click. At the end of the article we test Bitcoin mixing in the built-in Blender.io service.<\/p>\n

Cancelling transactions on the Bitcoin network<\/h2>\n

Replace-By-Fee \u2014 is a mechanism for changing the parameters of sending coins in the Bitcoin mempool. It allows replacing the transaction with a new one \u2014 with a higher fee or a different recipient address.<\/p>\n

Blender Wallet added<\/a> the Replace-By-Fee feature in December 2020. In the wallet, RBF is enabled by default. It can be disabled in the settings.<\/p>\n

We created a new wallet and transferred 0.00297 BTC to it. Blender Wallet is a hierarchical deterministic [HD] wallet. It automatically generates SegWit<\/a> and SegWit-compatible addresses when receiving and sending Bitcoin.<\/p>\n

Thereafter we signed a 0.001 BTC transaction to test RBF.<\/p>\n

\"In
Sending a transaction in Blender Wallet. The user can create several wallets.<\/figcaption><\/figure>\n

The transaction can be cancelled only before it is included in the blockchain, so we selected a low fee in the wallet settings at the time \u2014 18.23 sat\/vB. Immediately after that we pressed the ‘Cancel’ button.<\/p>\n

\"In
Until the transaction is confirmed, the Cancel button remains active.<\/figcaption><\/figure>\n

After entering the 2FA code the wallet cancelled the unconfirmed transaction. The coins were sent to a new Blender Wallet address. The new transaction was included in a block after 20 minutes.<\/p>\n

\"In
After cancellation, Blender Wallet shows the corresponding notification.<\/figcaption><\/figure>\n

Speeding up Bitcoin transactions<\/h2>\n

Blender Wallet offers two methods to speed up transactions: Replace-By-Fee (RBF) and Child Pays For Parent (CPFP).<\/p>\n

RBF replaces a transaction with a low fee with a higher-fee transaction. CPFP re-sends the user\u2019s change with a higher fee. This incentivises miners to confirm the original transaction more quickly. Blender Wallet automatically selects the optimal method to speed up the transaction.<\/p>\n

To test this feature we signed a 0.001 BTC transaction with a fee of 19.61 sat\/vB. We then pressed the ‘Speed up’ button \u2014 the wallet selected RBF.<\/p>\n

\"In
Blender Wallet automatically calculates the fee for replacing the transaction.<\/figcaption><\/figure>\n

Blender Wallet<\/a> cancels the transaction with the low fee. After that, the wallet adds to the mempool a transaction with the same recipient address but with a higher fee.<\/p>\n

\"In
The wallet does not increase the fee for the current transaction, instead it cancels it and sends a new one.<\/figcaption><\/figure>\n

After increasing the fee, miners added the transaction to the next block.<\/p>\n

Sending coins through Blender.io Bitcoin mixer<\/h2>\n

The Blender Wallet interface includes the Blender.io mixer. It mixes users’ Bitcoins using the Madeamaze algorithm, created on the basis of the transaction anonymisation technology CoinJoin<\/a>.<\/p>\n

The minimum mixing amount is 0.001 BTC. The service fee ranges from 0.5% to 2.5% of the transaction amount. In addition, the service charges 0.0003 BTC for sending to each destination address.<\/p>\n

We sent 0.00178237 BTC via Blender.io.<\/p>\n

\"In
To anonymise the Bitcoins when sending, you need to click the ‘Use Mixer’ button.<\/figcaption><\/figure>\n

After signing the transaction we received a guarantee letter from Blender Wallet, signed by the service wallet address. The document lists the terms of mixing: the deposit address and the mixer’s fee.<\/p>\n

\"In
Verify the authenticity of the Blender Wallet letter: copy the Bitcoin address, the text and the signature into the form.<\/figcaption><\/figure>\n

After mixing we received 0.00142925 BTC. The mixer fee amounted to 0.681% of the transaction amount plus 0.0003 BTC.<\/p>\n

\"In
Blender Wallet marks mixed transactions with a special icon and does not display the destination address.<\/figcaption><\/figure>\n

The mixing took about 30 minutes. The mixer delays sending coins to the destination address. This makes it harder for analytics services to link transactions.<\/p>\n

Blender.io does not store data that could link senders and recipients of transactions. It deletes information about recipients of mixed transactions an hour after the mixing is completed.<\/p>\n

Conclusion<\/h2>\n

In November 2011, the Mt. Gox management sent 2,609 BTC to ‘nowhere’ due to a bug in the exchange software. At the time, Bitcoin did not support Replace-By-Fee. These coins are forever locked in the Bitcoin blockchain.<\/p>\n

Decentralisation and immutability of transactions are the core principles of the first cryptocurrency. Bitcoin has no issuer that refunds money on demand.<\/p>\n

Since 2016, users can cancel transactions, but only before they are recorded in a block. It is important to spot the error promptly and quickly replace the transaction. Blender Wallet makes this possible with a single press of a button.<\/p>\n

Earlier, ForkLog published a detailed Blender Wallet review<\/a>. We calculated the time to hack the wallet, and described the tagging system and address freezing for spending controls.<\/p>\n

Follow ForkLog news on VK<\/a>!<\/p>\n","protected":false},"excerpt":{"rendered":"

Together with the Blender Wallet cryptocurrency wallet, we explain how to cancel and speed up a Bitcoin transaction in one click, and test coin mixing in the built-in Blender.io service.<\/p>\n","protected":false},"author":1,"featured_media":41233,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"select":"2","news_style_id":"1","cryptorium_level":"","_short_excerpt_text":"","creation_source":"","_metatest_mainpost_news_update":false,"footnotes":""},"categories":[1144],"tags":[1256,57],"class_list":["post-41232","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-longreads","tag-privacy-and-personal-data","tag-wallets"],"aioseo_notices":[],"amp_enabled":true,"views":"23","promo_type":"2","layout_type":"1","short_excerpt":"","is_update":"","_links":{"self":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/41232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/comments?post=41232"}],"version-history":[{"count":1,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/41232\/revisions"}],"predecessor-version":[{"id":41234,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/41232\/revisions\/41234"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/media\/41233"}],"wp:attachment":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/media?parent=41232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/categories?post=41232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/tags?post=41232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}