Algorithm 1 Register Smart Contract

1: function 1

2: (Trigger Transaction: Request Transaction

3: Input: Request ID and Name of the access device< NameA, IDA >)

4:  Send a program P to IDA;

5: end function 1

6: function 2

7: (Trigger Transaction: Register Transaction

8: Input: Basic information of the device)

9: Record device information<NameA, IDA, AddA, PA>;

10: end function 2

11: function 3

12: (Trigger Transaction: Related Transaction

13: IInput: Information of the related device)

14: Record related device information<num., distance,

15: Related_dev Address, establishment time, failure time>;

16: function 3