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World Cup Predictions: 100,000 USDT DailyHTX Invites You to Share 600K USDT in Gift PacksBTC Prophet: 20-Day 380 Million HTX ChallengeBitcoin News Today: Developer rkrux opened Bitcoin Core PR #35405 and posted to the Bitcoin-Dev mailing list on June 19, 2026, proposing to strip the legacy opt-in Replace-by-Fee (RBF) signal from wallet transactions, arguing that the BIP125 flag has become a redundant on-chain identifier now that full-RBF is the network’s default mempool policy. This is not simply a code cleanup. It is a coordinated Bitcoin privacy initiative that requires cross-wallet alignment on a single default nSequence value, a problem that is more structurally complex than removing a flag. rkrux posted to the Bitcoin-Dev mailing list proposing that wallets stop signaling opt-in RBF in the transactions they create…https://t.co/djmBbIubDG — Bitcoin Optech (@bitcoinoptech) June 19, 2026 Bitcoin News Today: RBF Signal Removal: Why the Legacy Flag Now Creates More Risk Than It Resolves Under BIP125, a transaction was considered opted in for replacement if any input carried an nSequence value below 0xffffffff − 1, a mechanism introduced in Bitcoin Core 0.12.0 in February 2016 to enable voluntary fee bumping of unconfirmed transactions without disrupting first-seen mempool behavior across the network. Bitcoin Core’s subsequent shift to full-RBF as default policy, begun with the mempoolfullrbf option added in version 24.0 and later made the unconditional default, rendered that signal operationally inert. As rkrux stated in the mailing list post: “The primary reason for its removal is because ever since full-RBF became a standard policy, this signaling has become redundant.” Nodes running current default policy will replace any transaction regardless of its nSequence values, per Bitcoin Optech’s RBF topic documentation. A decade old Bitcoin transaction flag became dead code 20 months ago. Bitcoin Core contributor rkrux wants wallets to stop setting it

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Bitcoin News Today: Developer rkrux opened Bitcoin Core PR #35405 and posted to the Bitcoin-Dev mailing list on June 19, 2026, proposing to strip the legacy opt-in Replace-by-Fee (RBF) signal from wallet transactions, arguing that the BIP125 flag has become a redundant on-chain identifier now that full-RBF is the network’s default mempool policy.

This is not simply a code cleanup. It is a coordinated Bitcoin privacy initiative that requires cross-wallet alignment on a single default nSequence value, a problem that is more structurally complex than removing a flag.

rkrux posted to the Bitcoin-Dev mailing list proposing that wallets stop signaling opt-in RBF in the transactions they create…https://t.co/djmBbIubDG

— Bitcoin Optech (@bitcoinoptech) June 19, 2026

Bitcoin News Today: RBF Signal Removal: Why the Legacy Flag Now Creates More Risk Than It Resolves

Under BIP125, a transaction was considered opted in for replacement if any input carried an nSequence value below

0xffffffff − 1,

 a mechanism introduced in Bitcoin Core 0.12.0 in February 2016 to enable voluntary fee bumping of unconfirmed transactions without disrupting first-seen mempool behavior across the network.

Bitcoin Core’s subsequent shift to full-RBF as default policy, begun with the

mempoolfullrbf

option added in version 24.0 and later made the unconditional default, rendered that signal operationally inert. As rkrux stated in the mailing list post: “The primary reason for its removal is because ever since full-RBF became a standard policy, this signaling has become redundant.” Nodes running current default policy will replace any transaction regardless of its nSequence values, per Bitcoin Optech’s RBF topic documentation.

A decade old Bitcoin transaction flag became dead code 20 months ago. Bitcoin Core contributor rkrux wants wallets to stop setting it

<div class="RichTextParagraph RichText" node-type="RichTextParagraph">
<a class="RichTextArticle" node-type="RichTextArticle" href="holigeit://open/v1?url=ihuobiglobal://m.hbg.com/content/topicDetail?topicId=1313" rel="noopener noreferrer" data-id=1313>World Cup Predictions: 100,000 USDT Daily</a><a class="RichTextArticle" node-type="RichTextArticle" href="holigeit://open/v1?url=ihuobiglobal://m.hbg.com/content/topicDetail?topicId=1317" rel="noopener noreferrer" data-id=1317>HTX Invites You to Share 600K USDT in Gift Packs</a><a class="RichTextArticle" node-type="RichTextArticle" href="holigeit://open/v1?url=ihuobiglobal://m.hbg.com/content/topicDetail?topicId=942" rel="noopener noreferrer" data-id=942>BTC Prophet: 20-Day 380 Million HTX Challenge</a><span class="RichTextText" node-type="RichTextText">Bitcoin News Today: Developer rkrux opened Bitcoin Core PR #35405 and posted to the Bitcoin-Dev mailing list on June 19, 2026, proposing to strip the legacy opt-in Replace-by-Fee (RBF) signal from wallet transactions, arguing that the BIP125 flag has become a redundant on-chain identifier now that full-RBF is the network’s default mempool policy.

This is not simply a code cleanup. It is a coordinated Bitcoin privacy initiative that requires cross-wallet alignment on a single default nSequence value, a problem that is more structurally complex than removing a flag.

rkrux posted to the Bitcoin-Dev mailing list proposing that wallets stop signaling opt-in RBF in the transactions they create…https://t.co/djmBbIubDG

— Bitcoin Optech (@bitcoinoptech) June 19, 2026

Bitcoin News Today: RBF Signal Removal: Why the Legacy Flag Now Creates More Risk Than It Resolves

Under BIP125, a transaction was considered opted in for replacement if any input carried an nSequence value below

0xffffffff − 1,

 a mechanism introduced in Bitcoin Core 0.12.0 in February 2016 to enable voluntary fee bumping of unconfirmed transactions without disrupting first-seen mempool behavior across the network.

Bitcoin Core’s subsequent shift to full-RBF as default policy, begun with the

mempoolfullrbf

option added in version 24.0 and later made the unconditional default, rendered that signal operationally inert. As rkrux stated in the mailing list post: “The primary reason for its removal is because ever since full-RBF became a standard policy, this signaling has become redundant.” Nodes running current default policy will replace any transaction regardless of its nSequence values, per Bitcoin Optech’s RBF topic documentation.

A decade old Bitcoin transaction flag became dead code 20 months ago. Bitcoin Core contributor rkrux wants wallets to stop setting it</span></div>

Bitcoin News Today: Developer rkrux opened Bitcoin

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