Formal Modelling of PBFT Consensus Algorithm in Event-B

Listing 5

Event ‘request’.

Event request

  Anym

  Where

   @grd1 m∈message

   @grd2 ∀i·(i∈NODES)⇒m∉cache(i)

  Then

   @act1 cache≔cache<+{pre↦cache(pre) ∪ {m}}

End