Update 2026-01-21-socratic-seminar-28.md

Author: tradewind886

_posts/2026-01-21-socratic-seminar-28.md

@@ -26,21 +26,25 @@ Learn about bitcoin development. Share, debate, and discuss trade offs in progre
 
 ### wallet migration bug causes Core v30 and v30.1 to be removed 1/6/2026
 * the issue: wallet/ directory can be deleted during the migration process in core V30
+  
          doesn't effect modern wallets >v.20
          not that "rare" -- normal use can result in this bug (pruned nodes or corrupted db log data)
 * wallet migration -> convert wallet.dat BDB key-values to Sqlite descriptor wallets
 * why this bug popped up now?
+  
         - migration wasn't mandatory before v30
         - proposed fixes to failed migrations broke tests
         - legacy wallets use the root wallet/ directory
         - legacy wallets are unnamed by default called \[default wallet\]
 * what are legacy wallets?
+  
         - wallet.dat private keys vs descriptors
         - BerkeleyDB vs Sqlite
         - Past issues with BerkeleyDB -- Bitcoin uses a specific version (4.8.30) of BerkeleyDB  chosen by Satoshi to fit Bitcoin's MIT license(?)
             -block 225430 (2013)
             -inflation bug (CVE-2018-17144 2018)
 * the fix so far (v30.2, v31)
+
         - remove wallets, not the folder
         - long term: remove wallet functionality in Core entirely