For_tests (transition_frontier_base.Frontier_base.Breadcrumb.For

val gen : 
  ?logger:Logger.t ->
  ?send_to_random_pk:bool ->
  precomputed_values:Precomputed_values.t ->
  verifier:Verifier.t ->
  ?trust_system:Trust_system.t ->
  accounts_with_secret_keys:
    (Signature_lib.Private_key.t option * Mina_base.Account.t) list ->
  unit ->
  ( t -> t Async_kernel.Deferred.t ) Core_kernel.Quickcheck.Generator.t

val gen_non_deferred : 
  ?logger:Logger.t ->
  precomputed_values:Precomputed_values.t ->
  verifier:Verifier.t ->
  ?trust_system:Trust_system.t ->
  accounts_with_secret_keys:
    (Signature_lib.Private_key.t option * Mina_base.Account.t) list ->
  unit ->
  ( t -> t ) Core_kernel.Quickcheck.Generator.t

val gen_seq : 
  ?logger:Logger.t ->
  precomputed_values:Precomputed_values.t ->
  verifier:Verifier.t ->
  ?trust_system:Trust_system.t ->
  accounts_with_secret_keys:
    (Signature_lib.Private_key.t option * Mina_base.Account.t) list ->
  int ->
  ( t -> t list Async_kernel.Deferred.t ) Core_kernel.Quickcheck.Generator.t

val build_fail : 
  ?skip_staged_ledger_verification:[ `All | `Proofs ] ->
  logger:Logger.t ->
  precomputed_values:Precomputed_values.t ->
  verifier:Verifier.t ->
  trust_system:Trust_system.t ->
  parent:t ->
  transition:Mina_block.almost_valid_block ->
  sender:Network_peer.Envelope.Sender.t option ->
  transition_receipt_time:Core_kernel.Time.t option ->
  unit ->
  ( t,
    [> `Invalid_staged_ledger_diff of Core_kernel.Error.t
    | `Invalid_staged_ledger_hash of Core_kernel.Error.t
    | `Fatal_error of exn ] )
    Core_kernel.Result.t
    Async_kernel.Deferred.t