fix doubleentry decision

Author: vans163

ex/lib/bic/epoch.ex

@@ -111,6 +111,7 @@ defmodule BIC.Epoch do
       "6V65RDdHU8T7TbFxGh42sp2hmXrfmRRFbuTjmJv4yysikdNhtdSC2yMxr7L95gDCKn",
       "6V668VVot57QvwjY2s1w8RbgeYE2ftBCxUt1uNp5mfJgXPiUoepteUguXUSYpf3a7E"
     ] |> Enum.map(& Base58.decode(&1))
+    def peddlebike67() do @peddlebike67 end
 
     def call(:submit_sol, env, [sol]) do
         hash = Blake3.hash(sol)

ex/lib/consensus/fabric_gen.ex

@@ -147,8 +147,13 @@ defmodule FabricGen do
             cond do
               !mymut ->
                 IO.puts "softfork: rewind to entry #{Base58.encode(best_entry.hash)}, height #{best_entry.header_unpacked.height}"
-                {entry, mut_hash, score} = List.first(best_entry_for_height(next_height - 1))
-                true = Consensus.chain_rewind(entry.hash)
+                hash = try do
+                  {entry, mut_hash, score} = List.first(best_entry_for_height(next_height - 1))
+                  entry.hash
+                catch
+                  _,_ -> Consensus.chain_tip()
+                end
+                true = Consensus.chain_rewind(hash)
                 proc_consensus()
 
               mut_hash != mymut.mutations_hash ->