t() :: %Stellar.Horizon.Ledger{
  base_fee_in_stroops: non_neg_integer(),
  base_reserve_in_stroops: non_neg_integer(),
  closed_at: DateTime.t(),
  failed_transaction_count: non_neg_integer(),
  fee_pool: float(),
  hash: String.t(),
  header_xdr: String.t(),
  id: String.t(),
  max_tx_set_size: non_neg_integer(),
  operation_count: non_neg_integer(),
  paging_token: String.t(),
  prev_hash: String.t(),
  protocol_version: non_neg_integer(),
  sequence: non_neg_integer(),
  successful_transaction_count: non_neg_integer(),
  total_coins: float(),
  tx_set_operation_count: non_neg_integer()
}