anchor.diff:      setup_nodes/2,
       start_node/2,
       kill_node/2,
  -    request/4,
  +    request/3,
       wait_for_value/4,
       wait_for_time/4,
       time_to_ms/1
  
positive.code:     [start_node(N, Cfg) || N <- InitialNodes],
      wait_for_startup(InitialNodes, Height, Cfg),
  
      InitialBlocks = [{N, get_block(N, Height, Cfg)} || N <- InitialNodes],
  
      N5Block = sync_node(n5, Height, Cfg),
      N6Block = sync_node(n6, Height, Cfg),
  
negative.code:         interval => ?cfg(mine_interval)
      }),
  
      Blocks = [{N, get_block(N, Reached)} || N <- Nodes],
      [?assertEqual(AB, BB) || {AN, AB} <- Blocks, {BN, BB} <- Blocks, AN =/= BN].
  
  %=== INTERNAL FUNCTIONS ========================================================
  