--- # This file is licensed under the MIT License (MIT) available on # http://opensource.org/licenses/MIT. required: #-------------40 characters-------------# title_max_40_characters_no_formatting: Hard Fork, Hard-Forking Change summary_max_255_characters_no_formatting: > A permanent divergence in the block chain, commonly occurs when non-upgraded nodes can't validate blocks created by upgraded nodes that follow newer consensus rules. synonyms_shown_in_glossary_capitalize_first_letter: - Hard fork optional: synonyms_and_pluralizations_not_shown_in_glossary: - hard forks - hard-forking change - hard-forking not_to_be_confused_with_capitalize_first_letter: - Fork (a regular fork where all nodes follow the same consensus rules, so the fork is resolved once one chain has more proof of work than another) - Soft fork (a temporary divergence in the block chain caused by non-upgraded nodes not following new consensus rules) - Software fork (when one or more developers permanently develops a codebase separately from other developers) - Git fork (when one or more developers temporarily develops a codebase separately from other developers links_html_or_markdown_style_capitalize_first_letter: - "[Hard fork](/en/developer-guide#term-hard-fork) --- Developer Guide" - "[Hard fork](https://en.bitcoin.it/wiki/Hardfork) --- Bitcoin Wiki" - "[Has a hard fork ever occurred?](http://bitcoin.stackexchange.com/q/36090) --- Bitcoin StackExchange" ---