Build out 'createoffer' API method

cli/src/main/java/bisq/cli/CliMain.java

@@ -45,6 +45,7 @@
 
 import lombok.extern.slf4j.Slf4j;
 
+import static bisq.cli.CurrencyFormat.fixedPriceToLong;
 import static bisq.cli.CurrencyFormat.formatSatoshis;
 import static bisq.cli.CurrencyFormat.toSatoshis;
 import static bisq.cli.NegativeNumberOptions.hasNegativeNumberOptions;
@@ -200,12 +201,12 @@ public static void run(String[] args) {
                     var amount = toSatoshis(nonOptionArgs.get(4));
                     var minAmount = toSatoshis(nonOptionArgs.get(5));
                     var useMarketBasedPrice = Boolean.parseBoolean(nonOptionArgs.get(6));
-                    var fixedPrice = ZERO;
+                    var fixedPrice = 0L;
                     var marketPriceMargin = ZERO;
                     if (useMarketBasedPrice)
                         marketPriceMargin = new BigDecimal(nonOptionArgs.get(7));
-                    else
-                        fixedPrice = new BigDecimal(nonOptionArgs.get(7));
+                    else  // Scale and convert the (double) fixed price to a long.
+                        fixedPrice = fixedPriceToLong(nonOptionArgs.get(7));
                     var securityDeposit = new BigDecimal(nonOptionArgs.get(8));
 
                     var request = CreateOfferRequest.newBuilder()
@@ -214,7 +215,7 @@ public static void run(String[] args) {
                             .setAmount(amount)
                             .setMinAmount(minAmount)
                             .setUseMarketBasedPrice(useMarketBasedPrice)
-                            .setPrice(fixedPrice.longValue())
+                            .setPrice(fixedPrice)
                             .setMarketPriceMargin(marketPriceMargin.doubleValue())
                             .setBuyerSecurityDeposit(securityDeposit.doubleValue())
                             .setPaymentAccountId(paymentAcctId)

cli/src/main/java/bisq/cli/CurrencyFormat.java

@@ -17,6 +17,8 @@
 
 package bisq.cli;
 
+import com.google.common.math.DoubleMath;
+
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
 
@@ -26,6 +28,7 @@
 import java.util.Locale;
 
 import static java.lang.String.format;
+import static java.math.RoundingMode.HALF_UP;
 
 class CurrencyFormat {
 
@@ -74,4 +77,11 @@ static long toSatoshis(String btc) {
             throw new IllegalArgumentException(format("'%s' is not a number", btc));
         }
     }
+
+    static long fixedPriceToLong(String fixedPrice) {
+        BigDecimal priceInput = new BigDecimal(fixedPrice);
+        int precision = 2;
+        double factor = Math.pow(priceInput.doubleValue(), precision);
+        return DoubleMath.roundToLong(factor, HALF_UP);
+    }
 }