Idempotency Situation

Idempotency is executing the same operation multiple times that will result in the same final state

Situation:

1. Imagine there are 2 accounts A which has a balance of 400 and B which has a balance of 150
   If A initiates a transfer of 100 to B,

2. first transfer:
   A sends B 100, A=400-100-> 300, B=150+100-> 250.

3. second transfer:
   A sends B 100 again, A=300-100 -> 200, B=250+100-> 350.

From the situation, we can see that:

• The system processes each request independently.
• There is no mechanism to detect duplicates.
• The same transaction is applied multiple times.

Result:

• Incorrect account balances
• Loss of data integrity
• inconsistency