From 871d010637205965dabb7f29e43679756a4449a6 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <grothoff@gnunet.org>
Date: Tue, 27 Dec 2022 03:31:13 +0100
Subject: [PATCH] -expand tables

---
 src/exchangedb/0003-kyc_attributes.sql | 33 ++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/exchangedb/0003-kyc_attributes.sql b/src/exchangedb/0003-kyc_attributes.sql
index db7f2e1ed..1547466f8 100644
--- a/src/exchangedb/0003-kyc_attributes.sql
+++ b/src/exchangedb/0003-kyc_attributes.sql
@@ -27,7 +27,10 @@ BEGIN
     'CREATE TABLE IF NOT EXISTS %I'
       '(kyc_attributes_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY'
       ',h_payto BYTEA PRIMARY KEY CHECK (LENGTH(h_payto)=32)'
+      ',kyc_prox BYTEA NOT NULL CHECK (LENGTH(kyc_prox)=32)'
       ',provider VARCHAR NOT NULL'
+      ',birthdate VARCHAR'
+      ',collection_time INT8 NOT NULL'
       ',expiration_time INT8 NOT NULL'
       ',encrypted_attributes VARCHAR NOT NULL'
     ') %s ;'
@@ -46,6 +49,24 @@ BEGIN
     ,table_name
     ,partition_suffix
   );
+  PERFORM comment_partitioned_column(
+     'short hash of normalized full name and birthdate; used to efficiently find likely duplicate users'
+    ,'kyc_prox'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'birth date of the user, in format YYYY-MM-DD where a value of 0 is used to indicate unknown (in official documents); NULL if the birth date was not collected by the provider; used for KYC-driven age restrictions'
+    ,'birthdate'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'time when the attributes were collected by the provider'
+    ,'collection_time'
+    ,table_name
+    ,partition_suffix
+  );
   PERFORM comment_partitioned_column(
      'time when the attributes should no longer be considered validated'
     ,'expiration_time'
@@ -85,6 +106,18 @@ BEGIN
       ' ADD CONSTRAINT ' || table_name || '_serial_key '
         'UNIQUE (kyc_attributes_serial_id)'
   );
+  -- To search similar users (e.g. during AML checks)
+  EXECUTE FORMAT (
+    'CREATE INDEX ' || table_name || '_similarity_index '
+    'ON ' || table_name || ' '
+    '(kyc_prox);'
+  );
+  -- For garbage collection
+  EXECUTE FORMAT (
+    'CREATE INDEX ' || table_name || '_expiration_time '
+    'ON ' || table_name || ' '
+    '(expiration_time ASC);'
+  );
 END $$;