wp-includes/sodium_compat/lib/php72compat.php:137$stringstring$variantint$ignorestringoptional''string function sodium_base642bin( #[\SensitiveParameter] $string, $variant, $ignore ='' ) { return ParagonIE_Sodium_Compat::base642bin($string, $variant, $ignore); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/sodium_compat/lib/php72compat.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.