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+--
+-- This file is part of TALER
+-- Copyright (C) 2014--2022 Taler Systems SA
+--
+-- TALER is free software; you can redistribute it and/or modify it under the
+-- terms of the GNU General Public License as published by the Free Software
+-- Foundation; either version 3, or (at your option) any later version.
+--
+-- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+-- A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License along with
+-- TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
+--
+
+CREATE OR REPLACE FUNCTION create_table_kyc_attributes(
+ IN partition_suffix VARCHAR DEFAULT NULL
+)
+RETURNS VOID
+LANGUAGE plpgsql
+AS $$
+DECLARE
+ table_name VARCHAR DEFAULT 'kyc_attributes';
+BEGIN
+ PERFORM create_partitioned_table(
+ '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'
+ ',collection_time INT8 NOT NULL'
+ ',expiration_time INT8 NOT NULL'
+ ',encrypted_attributes BYTEA NOT NULL'
+ ',legitimization_serial INT8 NOT NULL'
+ ') %s ;'
+ ,table_name
+ ,'PARTITION BY HASH (h_payto)'
+ ,partition_suffix
+ );
+ PERFORM comment_partitioned_table(
+ 'KYC data about particular payment addresses'
+ ,table_name
+ ,partition_suffix
+ );
+ PERFORM comment_partitioned_column(
+ 'hash of payto://-URI the attributes are about'
+ ,'h_payto'
+ ,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'
+ ,table_name
+ ,partition_suffix
+ );
+ PERFORM comment_partitioned_column(
+ 'configuration section name of the provider that affirmed the attributes'
+ ,'provider'
+ ,table_name
+ ,partition_suffix
+ );
+ PERFORM comment_partitioned_column(
+ '(encrypted) JSON object (as string) with the attributes'
+ ,'encrypted_attributes'
+ ,table_name
+ ,partition_suffix
+ );
+ PERFORM comment_partitioned_column(
+ 'Reference the legitimization process for which theses attributes are gathered for.'
+ ,'legitimization_serial'
+ ,table_name
+ ,partition_suffix
+ );
+END $$;
+
+COMMENT ON FUNCTION create_table_kyc_attributes
+ IS 'Creates the kyc_attributes table';
+
+
+CREATE OR REPLACE FUNCTION constrain_table_kyc_attributes(
+ IN partition_suffix VARCHAR
+)
+RETURNS void
+LANGUAGE plpgsql
+AS $$
+DECLARE
+ table_name VARCHAR DEFAULT 'kyc_attributes';
+BEGIN
+ table_name = concat_ws('_', table_name, partition_suffix);
+ EXECUTE FORMAT (
+ 'ALTER TABLE ' || table_name ||
+ ' ADD CONSTRAINT ' || table_name || '_serial_key '
+ 'UNIQUE (kyc_attributes_serial_id)'
+ );
+ -- The legitimization_serial is a foreign key.
+ -- TODO: due to partitioning by h_payto, we can not simply reference
+ -- the serial id of the legitimization_processes
+ -- EXECUTE FORMAT (
+ -- 'ALTER TABLE ' || table_name ||
+ -- ' ADD CONSTRAINT ' || table_name || '_foreign_legitimization_processes'
+ -- ' FOREIGN KEY (legitimization_serial) '
+ -- ' REFERENCES legitimization_processes (legitimization_process_serial_id)' -- ON DELETE CASCADE
+ -- );
+ -- To search similar users (e.g. during AML checks)
+ EXECUTE FORMAT (
+ 'CREATE INDEX ' || table_name || '_similarity_index '
+ 'ON ' || table_name || ' '
+ '(kyc_prox);'
+ );
+ -- For garbage collection
+ EXECUTE FORMAT (
+ 'CREATE INDEX ' || table_name || '_expiration_time '
+ 'ON ' || table_name || ' '
+ '(expiration_time ASC);'
+ );
+END $$;
+
+
+INSERT INTO exchange_tables
+ (name
+ ,version
+ ,action
+ ,partitioned
+ ,by_range)
+ VALUES
+ ('kyc_attributes'
+ ,'exchange-0003'
+ ,'create'
+ ,TRUE
+ ,FALSE),
+ ('kyc_attributes'
+ ,'exchange-0003'
+ ,'constrain'
+ ,TRUE
+ ,FALSE);