Algorithms A3. Smart Contract 3: Product Purchase2

Input: product name, product id, product type, batch number, product quantity, addr, seller, buyer

1. if addr is valid && addr has authentication

2. distributor_details=getDistributor(buyer)

3. x[]=getProduct_Adulteration_Info(product id)

4. y[]=getProduct_Contamination_Info(product id)

5. if x.quality ==1 && y.quality==1

6. Proceed with the purchase

7. Initiate the payment to the distributor

8. z=addBilling_Info(addr, seller, distributor_details, product id, product quantity, product name, product type, batch number, price)

9. if z==1

10. Payment Successful

11. updateProduct_Quantity(product id, product quantity, product name, product type)

12. addProduct_Sales_Info(seller, batch number, product id, product quantity, product name, product type)

13. end

14. else

15. Payment Unsuccessful

16. go to step 7

17. end

18. else

19. Product not fit for purchase due to lower quality standards

20. end

21. else

22. Invalid or authorised address

23. go to step 1 and enter a valid address

24. end