How can a deferred dowry of two million be paid, given the cancellation of the currency agreed upon in 2019 and its replacement with a global currency?

If the currency of your country, on which the contract was based, is abolished, then you are liable for its value. Scholars have differed on the day considered for estimating this value: whether it is the day of the contract, the day of demand, or the last day before the currency's abolition. The latter is perhaps the closest. Some jurists have held that if a depreciated currency was the price in a sale, the contract becomes invalid. If it was a debt in a loan or a deferred dowry, then its like must be returned. Others have maintained that the value of the currency on which the contract was made must be returned on the day of the transaction, while still others believe the value should be returned at the time of depreciation. Meanwhile, the Shafi'is and Malikis hold that if a currency depreciates after it has become an obligation but before it is paid, the creditor has no claim other than it, and this depreciation is considered like a calamity that befell him.