{"id":17847,"date":"2021-01-22T18:36:50","date_gmt":"2021-01-22T18:36:50","guid":{"rendered":"http:\/\/ci027cfe6d40002697"},"modified":"2025-10-02T15:09:17","modified_gmt":"2025-10-02T20:09:17","slug":"discussing-bitcoin-core-0-21-0","status":"publish","type":"post","link":"https:\/\/bitcoinmagazine.com\/technical\/discussing-bitcoin-core-0-21-0","title":{"rendered":"Discussing Bitcoin Core 0.21.0"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><figure><img decoding=\"async\" src=\"https:\/\/bitcoinmagazine.com\/wp-content\/uploads\/2024\/11\/sjorsnado-album-cover.png\" title=\"\"><\/figure>\n<div class=\"youtube-embed\" data-video_id=\"kM4912dv39o\"><iframe loading=\"lazy\" title=\"Bitcoin Core 0.21.0 \u2014 The Van Wirdum Sjorsnado 24 - Bitcoin Magazine\" width=\"696\" height=\"392\" src=\"https:\/\/www.youtube.com\/embed\/kM4912dv39o?feature=oembed&#038;enablejsapi=1\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p><strong>Listen To This Episode:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/podcasts.apple.com\/us\/podcast\/the-van-wirdum-sjorsnado-the-technical-side-of-bitcoin\/id1532957243#episodeGuid=19a171c4-6aaf-4fee-bc14-263d10ed481a\" target=\"_blank\" rel=\"noopener\">Apple<\/a><\/li>\n<li><a href=\"https:\/\/open.spotify.com\/episode\/25gj7ETW7Jm5T2LiZgDSUX?si=WJoBD5Z0TlyFmQKTXKmfSw\" target=\"_blank\" rel=\"noopener\">Spotify<\/a><\/li>\n<li><a href=\"https:\/\/podcasts.google.com\/feed\/aHR0cHM6Ly9uYWRvYnRjLmxpYnN5bi5jb20vcnNz\/episode\/MTlhMTcxYzQtNmFhZi00ZmVlLWJjMTQtMjYzZDEwZWQ0ODFh?sa=X&amp;ved=0CAcQuIEEahcKEwjAqM3RkrDuAhUAAAAAHQAAAAAQAg\" target=\"_blank\" rel=\"noopener\">Google<\/a><\/li>\n<li>Libsyn<\/li>\n<li><a href=\"https:\/\/overcast.fm\/+jXsR-y3-g\" target=\"_blank\" rel=\"noopener\">Overcast<\/a><\/li>\n<\/ul>\n<p>In this episode of \u201cThe Van Wirdum Sjorsnado,\u201d hosts Aaron van Wirdum and Sjors Provoost discussed the newly released Bitcoin Core 0.21.0.<\/p>\n<p>Bitcoin Core 0.21.0 is the 21st and latest major release of the Bitcoin Core software, the oldest and most important Bitcoin node implementation, which is often also regarded as the reference implementation for the Bitcoin protocol.<\/p>\n<p>Guided by the Bitcoin Core 0.21.0 release notes, van Wirdum and Provoost discussed this release\u2019s most important changes. These include the new mempool policy for rebroadcasting transactions, Tor v3 support, peer anchors for when the node restarts, BIP 157 (Neutrino) for light clients, the new testnet called Signet, BIP 339 (wtxid relay), Taproot code, RPC changes including a new send RPC, ZeroMQ, descriptor wallets, the new SQLite database system and the satoshi-per-byte fee denomination.<\/p>\n<p>For each of the new features, the hosts discussed what the features are, how they will change using Bitcoin (Core) and \u2014 where applicable \u2014 what the end goal is. (In Bitcoin Core development, new features are often part of a bigger process.) For any feature they discussed on a previous episode of &#8220;The Van Wirdum Sjorsnado,&#8221; they also mentioned the relevant episode&nbsp;number.<\/p>\n<p><a href=\"https:\/\/bitcoinmagazine.com\/articles\/bitcoin-core-0-21-0-released-whats-new\">Learn more about Bitcoin Core 0.21.0 release notes<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This episode of &#8220;The Van Wirdum Sjorsnado&#8221; covers the latest major release of the Bitcoin Core software and its most important changes.<\/p>\n","protected":false},"author":2520,"featured_media":17379,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[227,3128,1367,543],"class_list":{"0":"post-17847","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-technical","8":"tag-bitcoin-core","9":"tag-bitcoin-core-0-21-0","10":"tag-van-wirdum-sjorsnado","11":"tag-video"},"author_data":{"id":2520,"name":"Bitcoin Magazine","nicename":"bitcoin-magazine","avatar_url":"https:\/\/bitcoinmagazine.com\/wp-content\/uploads\/2025\/01\/bitcoin-magazine-logo.jpeg"},"featured_image_url":"https:\/\/bitcoinmagazine.com\/wp-content\/uploads\/2024\/11\/sjorsnado-album-cover.png","_links":{"self":[{"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/posts\/17847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/users\/2520"}],"replies":[{"embeddable":true,"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/comments?post=17847"}],"version-history":[{"count":0,"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/posts\/17847\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/media\/17379"}],"wp:attachment":[{"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/media?parent=17847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/categories?post=17847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bitcoinmagazine.com\/wp-json\/wp\/v2\/tags?post=17847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}