Add additional logging around boost amounts.

core-util/src/main/java/org/signal/core/util/money/FiatMoney.java

@@ -62,7 +62,7 @@ public class FiatMoney {
     NumberFormat formatter = NumberFormat.getInstance(Locale.US);
     formatter.setMaximumFractionDigits(0);
     formatter.setGroupingUsed(false);
-    
+
     BigDecimal multiplicand = BigDecimal.TEN.pow(currency.getCurrencyCode().equals("UGX") ? 2 : currency.getDefaultFractionDigits());
 
     return formatter.format(amount.multiply(multiplicand));
@@ -73,4 +73,13 @@ public class FiatMoney {
            Objects.equals(left.currency, right.currency) &&
            Objects.equals(left.timestamp, right.timestamp);
   }
+
+  @Override
+  public String toString() {
+    return "FiatMoney{" +
+           "amount=" + amount +
+           ", currency=" + currency +
+           ", timestamp=" + timestamp +
+           '}';
+  }
 }