Formal Modelling of PBFT Consensus Algorithm in Event-B

Listing 6

Event ‘Commit’.

Event commit

  Anym node

  Where

   @grd1 m∈message

   @grd2 node∈NODES∖{pre}

   @grd3 m∉cache(node)

   @grd4 m∈cache(pre)

  Then

   @act1 cache(node)≔cache(node)∪{m}

End