package com.r3corda.explorer

import com.r3corda.core.contracts.Amount

enum class Positivity {
    Positive,
    Negative
}

val Positivity.sign: String get() = when (this) {
    Positivity.Positive -> ""
    Positivity.Negative -> "-"
}

data class AmountDiff<T>(
     val positivity: Positivity,
     val amount: Amount<T>
) {
    companion object {
        fun <T> fromLong(quantity: Long, token: T) =
                AmountDiff(
                        positivity = if (quantity < 0) Positivity.Negative else Positivity.Positive,
                        amount = Amount(Math.abs(quantity), token)
                )
    }
}
