A Blockchain-Based Contractual Routing Protocol for the Internet of Things Using Smart Contracts

Algorithm 5

Expire function.

1:  function EXPIRE()

2:   Transfer tokens from the function caller to the block producer.

3:   if is Route Requested then

4:    if current time is more than then

5:     Transfer tokens back to

6:     Transfer Offer tokens back to

7:    end if

8:   end if

9:   if is Route Offered then

10:   if current time is more than Offer then

11:    Transfer tokens back to

12:    Transfer Offer tokens back to

13:   end if

14:  end if

15:  if is Route Accepted then

16:   if the function caller is or then

17:    Transfer and Offer tokens to

18:   end if

19:   if the function caller is then

20:    Transfer and Offer tokens to

21:   end if

22:  end if

23: end function