Merge branch 'main' of github.com:code-wallet/code-sdk

Author: zfedoran

docs/reference/idempotency.md

@@ -40,3 +40,6 @@ By incorporating the `idempotencyKey` with specific game and item IDs:
 * Players purchases are singular. Any effort to replicate the transaction will fail.
 
 * Should any interruptions occur during the buying process, like server outages or communication failures, the transaction can be re-validated without the threat of repeated charges.
+
+::: info
+Since the `idempotencyKey` is global among all payments, developers should consider incorporating a unique value to further differentiate a payment. For example, use  `destination` address when appropriate or also include a developer-specific random GUID.