btcpay generating invoices and payments can be invalidated

capsulflask/schema_migrations/02_up_accounts_vms_etc.sql

@@ -52,6 +52,7 @@ CREATE TABLE payments (
   email      TEXT REFERENCES accounts(email) ON DELETE RESTRICT,
   created    TIMESTAMP NOT NULL DEFAULT NOW(),
   dollars    NUMERIC(8, 2) NOT NULL,
+  invalidated BOOLEAN NOT NULL DEFAULT FALSE,
   PRIMARY KEY (email, created)
 );
 
@@ -62,13 +63,21 @@ CREATE TABLE login_tokens (
   PRIMARY KEY (email, created)
 );
 
-CREATE TABLE stripe_checkout_sessions (
+CREATE TABLE payment_sessions (
   id         TEXT PRIMARY KEY,
   email      TEXT REFERENCES accounts(email) ON DELETE RESTRICT,
+  type       TEXT NOT NULL,
   created    TIMESTAMP NOT NULL DEFAULT NOW(),
   dollars    NUMERIC(8, 2) NOT NULL
 );
 
+CREATE TABLE unconfirmed_btcpay_invoices (
+  id         TEXT PRIMARY KEY,
+  email      TEXT REFERENCES accounts(email) ON DELETE RESTRICT,
+  created    TIMESTAMP NOT NULL,
+  FOREIGN KEY (email, created) REFERENCES payments(email, created) ON DELETE CASCADE
+);
+
 INSERT INTO os_images (id, template_image_file_name, description)
 VALUES  ('alpine311', 'alpine-cloud-2020-04-18.qcow2', 'Alpine Linux 3.11'),
         ('ubuntu18', 'ubuntu-18.04-minimal-cloudimg-amd64.img', 'Ubuntu 18.04 LTS (Bionic)'),