internal Pair(CoinbaseProClient coinbaseProClient, string idCrypto, string idFiat, ProductType productType)
{
this.coinbaseProClient = coinbaseProClient;
this.IdCrypto = idCrypto;
this.IdFiat = idFiat;
this.TypeProduit = productType;
NomCrypto = productType.BaseCurrency();
NomFiat = productType.QuoteCurrency();
}