SinglePaymentAmount.fromMap constructor
Not identical with PaymayaAmount.
This was intended for SinglePayment method which uses the value as String instead of num
Converts Map to SinglePaymentAmount
Implementation
factory SinglePaymentAmount.fromMap(Map<String, dynamic> map) {
return SinglePaymentAmount(
currency: map['currency'] ?? 'PHP',
value: map['value'] ?? '',
metadata: Map<String, dynamic>.from(map['metadata'] ?? const {}),
);
}