{"how":["All hashes are SHA-256 in lowercase hex, over UTF-8 text.","leaf = hash(\"leaf|\" + salt + \"|\" + bani + \"|\" + email), and its sum is bani.","parent = hash(\"node|\" + left.hash + \"|\" + left.sum + \"|\" + right.hash + \"|\" + right.sum), and its sum is left.sum + right.sum.","Walk your path from the leaf. \"side\" says where the given node sits. No sum may be negative.","The result must equal the month's root and total_bani.","seal = hash(\"seal|\" + prev_seal + \"|\" + month + \"|\" + people + \"|\" + total_bani + \"|\" + cash_bani + \"|\" + root), with an empty cash_bani when null."],"months":[]}