object BigDecimalSerializer : KSerializer<BigDecimal> {
    override val descriptor: SerialDescriptor =
        PrimitiveSerialDescriptor("java.math.BigDecimal", PrimitiveKind.STRING)
    override fun serialize(encoder: Encoder, value: BigDecimal) {
        encoder.encodeString(value.toString())
    }
    override fun deserialize(decoder: Decoder): BigDecimal {
        return decoder.decodeString().toBigDecimal()
    }
}