Formal Modelling of PBFT Consensus Algorithm in Event-B

Listing 11

Event ‘Low_water’.

Event Low_water

  AnyS S1

  Where

   @grd1 S⊆dom(union(ran(G)))

   @grd2 S≠∅

   @grd3 S1⊆corr

   @grd4 3(S1)≥2(NODES)+1

   @grd5 ∀i,j·i∈S1∧j∈S⇒j∈dom(G(i))

  Then

   @act1 n≔max(dom(contents[S]))+1

 End