BFR-SE: A Blockchain-Based Fair and Reliable Searchable Encryption Scheme for IoT with Fine-Grained Access Control in Cloud Environment

Algorithm 4

SearchRequest.

 Input: , Sn,TOK, COMM

 Output: void

1 require_auth()

2 s = search_idx.find()

3 send action (eosio.token, transfer, Auth, (,_self, d))

4 ifs == nullthen

5  s. =

6  s.SerialNum = Sn

7  s.TOK = TOK

8  s.COMM = COMM

9  s.Coin = d

10  s.Height = getCurrentHeight()

11  search_idx.emplace(s)

12 else if (getCurrentHeight() > (s.Height+2round_height)) then

13  s.SerialNum = Sn

14  s.TOK = TOK

15  s.COMM = COMM

16  s.Coin = d

17  s.Height = getCurrentHeight()

18  search_idx.modify(s)

19 end