         blockHeight = decoder.decode("bh")
         exchangeRate = decoder.decode("er")
         exchangeRateCurrency = decoder.decode("erc")
-        confirmations = decoder.decode("conf")
         size = decoder.decode("s")
         firstConfirmation = decoder.decode("fconf")
         created = decoder.decode("c")

        coder.encode(blockHeight, key: "bh")
        coder.encode(exchangeRate, key: "er")
        coder.encode(exchangeRateCurrency, key: "erc")
        coder.encode(confirmations, key: "conf")
        coder.encode(size, key: "s")
        coder.encode(firstConfirmation, key: "fconf")
        coder.encode(created, key: "c")

    var blockHeight: Int = 0
    var exchangeRate: Int = 0
    var exchangeRateCurrency: String = ""
    var size: Int = 0
    var created: NSDate = NSDate.zeroValue()
    var firstConfirmation: NSDate = NSDate.zeroValue()
