@type contract() :: Stellar.TxBuild.SCAddress.t()

@type durability() :: :temporary | :persistent

@type error() :: {:error, atom()}

@type key() :: Stellar.TxBuild.SCVal.t()

@type t() :: %Stellar.TxBuild.Ledger.ContractData{
  contract: contract(),
  durability: durability(),
  key: key()
}

@type validation() :: {:ok, any()} | error()