Research Article
HLOChain: A Hierarchical Blockchain Framework with Lightweight Consensus and Optimized Storage for IoT
| | Require: params: ; ; ; , : time interval | | | Ensure: consensus | | (1) | procedure | | (2) | | | (3) | if () then | | (4) | generate | | (5) | broadcast | | (6) | waiting for , and: | | (7) | receive (incrementing ) | | (8) | if () then | | (9) | update () | | (10) | broadcast “consensus failure, new ” | | (11) | go to (line 2) | | (12) | else | | (13) | select the luck : the of is minimum | | (14) | if (my is the luck) then | | (15) | generate a new block | | (16) | update block height: | | (17) | update | | (18) | update | | (19) | broadcast new (, , ) | | (20) | go to (line 2) | | (21) | else | | (22) | waiting for , and: | | (23) | if (the new Block has arrived) then | | (24) | verify it | | (25) | if (the Block passes validation) then | | (26) | update Blockchain | | (27) | update (, ) | | (28) | broadcast new (, , ) | | (29) | go to (line 2) | | (30) | end if | | (31) | else | | (32) | update () | | (33) | broadcast “consensus failure, new ” | | (34) | go to (line 2) | | (35) | end if | | (36) | end if | | (37) | end if | | (38) | else | | (39) | wait for the new (, , ) or (consensus failure, new ), go to (line 2) | | (40) | end if | | (41) | end procedure |
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