query
"exact match"
wildcard*
wild?ard
wild*rd
cake~
cakes
bake
"red velvet"^4
chocolate^2
tags:(+work -"fun-stuff")
+-&|!(){}[]^"~*?:\
\+
\*
\!
properties.timestamp:[1587729413488 TO *]
properties.title:{A TO Z}
chocolate AND vanilla
chocolate OR vanilla
(chocolate OR vanilla) NOT "vanilla pudding"
properties.title:"The Title" AND text
Yes, any randomly generated 256 bits can be used as a seed to generate an Ed25519 private key. One possible method for generating a private key from such a seed is by using a cryptographic hash function such as SHA256.
