From 0b396c517ef1697bd670dd853ea7acb2a556f5d8 Mon Sep 17 00:00:00 2001
From: henda07 <96376694+henda07@users.noreply.github.com>
Date: Fri, 1 Mar 2024 15:01:35 +0100
Subject: [PATCH] Update stream.move

---
 sources/stream.move | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/sources/stream.move b/sources/stream.move
index 96a21ad..9888147 100644
--- a/sources/stream.move
+++ b/sources/stream.move
@@ -44,6 +44,9 @@ module overmind::streams {
     //==============================================================================================
     // Constants - Add your constants here (if any)
     //==============================================================================================
+
+    const MAX_DURATION_SECONDS: u64 = 31536000; // Maximum duration for a stream (1 year in seconds)
+    const DEFAULT_PAYMENT_AMOUNT: u64 = 100; // Default payment amount if not specified
     
     //==============================================================================================
     // Error codes - DO NOT MODIFY
@@ -186,10 +189,40 @@ module overmind::streams {
     // Helper functions - Add your helper functions here (if any)
     //==============================================================================================
 
+    fun calculate_amount_claimable<PaymentCoin>(
+        stream: &Stream<PaymentCoin>,
+        clock: &Clock
+    ) -> u64 {
+        let now = clock.now_seconds();
+        let elapsed_seconds = now - stream.last_timestamp_claimed_seconds;
+        (stream.amount.value() * elapsed_seconds) / stream.duration_in_seconds
+    }    
+
     //==============================================================================================
     // Validation functions - Add your validation functions here (if any)
     //==============================================================================================
 
+    fun validate_payment_amount(payment: u64) -> u64 {
+        if payment == 0 {
+            return EPaymentMustBeGreaterThanZero;
+        }
+        return 0; // No error
+    }
+
+    fun validate_duration(duration: u64) -> u64 {
+        if duration == 0 {
+            return EDurationMustBeGreaterThanZero;
+        }
+        return 0; // No error
+    }
+
+    fun validate_sender_receiver(sender: address, receiver: address) -> u64 {
+        if sender == receiver {
+            return ESenderCannotBeReceiver;
+        }
+        return 0; // No error
+    }
+
     //==============================================================================================
     // Tests - DO NOT MODIFY
     //==============================================================================================
@@ -1999,4 +2032,4 @@ module overmind::streams {
         };
         test_scenario::end(scenario_val);        
     }
-}
\ No newline at end of file
+}