Lymah123 opened a new pull request, #4623:
URL: https://github.com/apache/fineract/pull/4623

   # Description
   
   ## Introduction
   
   Transactions may change due to correction. Correction can be done by 
reverting a transaction. This can lead to removing and adding transactions back 
to an account. It results new ID distribution from the transaction sequence. 
External systems may not want to follow up on these changes but rather access 
transactions as they are at their end state. In order to be able to direct 
client immediately to the right record an additional identifier is to be used.
   
   Supporting externalId is a long time wanted functionality with two major 
benefits:
   
   - Not an auto incremented number (privacy, harder to guess)
   - Not represent any internal state
   
   ## Requirements
   
   🟩 Supporting external id for identifying and fetching some if the entities 
in Fineract
   🟩 API enhancement to support targeting by external id
   ✅ External id can be provided in API request
   🟩 Extend API response with external id
   🟩 Support external id auto generation (configurable)
   
   **External identifier**
   
   - Must be unique
   - Immutable
   - Customer (Caller) provided
   - Ability to generate automatically (configurable)
   
   **Database**
   External identifier field to be stored in the loan table
   
   _type_: String
   
   _indexing_: true
   
   ## Configuration
   
   Enable to auto generate external id (if not provided).
   
   By default it should be disabled.
   
   _**This configuration already exists!**_
   
    
   
   ## Goal
   
   This story is focusing to introduce external ids for savings accounts and 
transactions!


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