Coda_worker_testnet.Paymentsval send_several_payments : 
  ?acceptable_delay:int ->
  Api.t ->
  node:int ->
  keypairs:Signature_lib.Keypair.t list ->
  n:int ->
  unit Async.Deferred.tval send_batch_consecutive_payments : 
  Api.t ->
  node:int ->
  sender:Signature_lib.Private_key.t ->
  keypairs:Signature_lib.Keypair.t list ->
  n:int ->
  Mina_base.Signed_command.t list Async.Deferred.t