SLATE - Simple Ledger Application: a Temporary Expedient

User interface

At this time there are two user interfaces:

a simple Web interface built upon the Flask microframework
a growing collection of command line tools accessed over SSH

The Web interface

The SLATE screens form a subset of those used in NESTS, with minimal, if any, modification.

Registration
Once registered, the login identity (primary identity) has access to an account created automatically in the currency specified in the registration form. The name of this account is in the new agent's private namespace.
- namespace
- agent name (entered in a text box)
- real name (entered in a text box) (optional)
- email address_ (entered in a text box)
- password (entered in a text box)
- PIN (entered in a text box)
Login recovery
A recovery link is sent by email.
- email address (entered in a text box)
Payment
Each payment is recorded in the currency's journal and in the ledgers of both payer and payee.
- payee identifier
- amount
- currency (selected from drop-down list)
- annotation (optional)
- (when enabled) parallel amount paid in national currency (optional)
home screen This is the screen displayed upon logging in, displaying
- balance in each currency
- links to
  - transaction history in each currency
  - export link for the ledger in each currency
  - a link to the parabolic plots for each currency
  - a agent update screen
Agent update screen allowing changes to
- agent name (entered in a text box)
- real name (entered in a text box) (optional)
- email address_ (entered in a text box)
- password (entered in a text box)
- PIN (entered in a text box)

This screen can be reached either when already logged in or via a password reset link received by email.

Namespace stewards

When logged in, any agent registered as a steward of a namespace will see the following additional links in its home screen:

add steward
add new currency
confirm pending registration
suspend agent
re-enable agent

Therefore the following additional screens are required:

Add steward for this namespace
- steward name
Add currency for this namespace
- currency's name
- currency prefix (optional)
- currency suffix (optional)
- initial steward name
Suspend agent
- agent name
Re-enable agent
- agent name

Currency stewards

When logged in, any agent registered as a steward of a currency will see the following additional links in its home screen:

add steward
add new currency
confirm pending registration
suspend agent
re-enable agent
export journal
post reversing transaction

Therefore the following additional screens are required:

Add steward for this currency
- steward name
Suspend agent
- agent name
Re-enable agent
- agent
Export journal
- currency
Post reversing transaction
- currency
- transaction number

Global administrators

When logged in, an agent registered a global administrator will see the following additional links in its home screen:

add new namespace
add global administrator
confirm pending registration
suspend agent
re-enable agent
export journal (for any currency)

Therefore the following additional screens are required:

Add new namespace
- namespace name (entered in a text box)
Add global administrator
- agent name (entered in a text box)
Suspend agent
- agent name (entered in a text box)
Re-enable agent
- agent name (selected from drop-down list of disabled agents)
Export journal
- currency name (selected from drop-down list)
- File download location (file dialogue)

Command-line interface

A number of command line tools have been written for use over SSH. Some of these have not yet been completed, and all are still in development to some extent. These exist mostly for development use and most users will not have the required SSH access, but they are available to those who choose to host their own installations.