/SdnListMonitor

Primary LanguageC#

SDN List Monitor

SDN List Monitor is a tool to monitor changes in the entries of OFAC's Specially Designated Nationals (SDN) List. This is done by periodic polling to the location of the SDN List and observing the symmetry between stored and retrieved entries.

Overview

SDN List Monitor is structured as follows:

  • SdnListMonitor.Core.Abstractions - provides abstractions for storing (ISdnDataPersistence), fetching (ISdnDataRetriever), comparing (ISdnDataChangesChecker), and monitoring (SdnMonitorServiceBase) SDN entries.
  • SdnListMonitor.Core - provides implementations for storing (InMemorySdnDataPersistence), comparing (SdnDataSymmetryChecker), and monitoring (SdnChangesMonitorService) SDN entries.
  • SdnListMonitor.Core.Xml - provides implementations for fetching (SdnXmlDataRetriever) and equality comparison (SdnXmlEntryEqualityComparer) of SDN entries in SDN.xml file that corresponds to the format defined in SDN.xsd schema file.

SdnListMonitor.ConsoleApp acts as an example to demonstrate the workflow.

Improvements To Make

  • Proper error handling with retry logic (e.g. Polly) when the SDN List is malformed.
  • Asynchronous deserialization for SdnXmlEntry in SdnXmlDataRetriever.
  • Support for Microsoft.Extensions.Logging.ILogger and proper logging.
  • Proper CancellationToken handling.
  • Support for external entries persistence storage for the next monitoring check.
  • Extended SdnXmlEntry equality comparison to support additional properties: programList, idList, akaList, addressList, nationalityList, citizenshipList, dateOfBirthList, placeOfBirthList, vesselInfo.
  • Support for the compressed SDN data (SDN.zip) retrieval in order to reduce network data usage.
  • Support for the advanced sanctions data model (sdn_advanced.xml) developed by the UN 1267/1988 Security Council Committee.