Algorithm 3. Check Counterfeiting Product

1: function CHECKCOUNTERFEITINGPROCESS (Nnv) 2: Input: T transaction   ▷ transaction of checking of products in blockchain 3: Output: S Boolean ▷ State of the product in the blockchain. 4:        P1 = getProductIdFromTransaction (T) 5: List <Product> Products = getValidatedProductFromBlockChain() 6: for each product Pi in Products do 7:                 if Pi = P1 then 8:                  S ← true 9:         else if Pi != P1 then 10:                      S ←    false 11:                end if 12:          end for 13: Return S 14: end function