Algorithm 2 Vaccine_Distribution
V_ID: Vaccination Lot ID F_Temp: Freezer Temperature F_Time: Freezer Start Time Mrules: Monitoring Rules TMIN: Minimum Temperature TMAX: Maximum Temperature TCAPTURED BY SENSOR: Temperature Captured by the Sensors
1.	Mapping (byte V_ID = >int) public V_ID
2.	mapping(string rules = >rules) public Mrules
3.	Mapping (address F_Temp = >V_ID) public F_Temp
4.	Mapping (address F_Temp = >Mrules) public Mrules
5.	Mapping (address F_Temp = >time) public time
6.	Mapping (bytes V_ID = >rule[]) public _monitored_values
7.	Procedure Vaccine_Distriution (V_ID, Mrules)
8.	Set modifier = Vaccine Producer
9.	If (id == Vaccine Producer) then
10.	Access granted
11.	Set F_Temp to Mrules [Temp]
12.	Set F_Time to block.timestamp
13.	Store F_Temp to rule []
14.	Store F_Time to rule []
15.	Add (rule)
16.	End If
17.	Else
18.	Access denied
19.	End Else
20.	If (TMIN < TCAPTURED BY SENSOR < TMAX && TIMETAKEN BY DISTRIBUTOR < TIMELIMIT):
21.	Vaccine lot is valid
22.	Return the details of vaccine lot
23.	End If
24.	Else:
25.	Not valid
26.	Return Vaccine lot is not suitable
27.	End Else
28.	End Procedure