Require fee extension when registering domain in EAP

Failing to use the fee extension during EAP can result in charges to registrars
that are radically different than what they may have been expecting.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=177597883

docs/flows.md

@@ -517,6 +517,8 @@ An EPP flow that creates a new domain resource.
     *   Service extension(s) must be declared at login.
     *   The current registry phase does not allow for general registrations.
 *   2003
+    *   Fees must be explicitly acknowledged when creating domains during the
+        Early Access Program.
     *   Fees must be explicitly acknowledged when performing any operations on a
         premium name.
     *   Admin contact is required.

java/google/registry/flows/domain/DomainCreateFlow.java

@@ -133,6 +133,7 @@
  * @error {@link DomainFlowUtils.ExceedsMaxRegistrationYearsException}
  * @error {@link DomainFlowUtils.ExpiredClaimException}
  * @error {@link DomainFlowUtils.FeesMismatchException}
+ * @error {@link DomainFlowUtils.FeesRequiredDuringEarlyAccessProgramException}
  * @error {@link DomainFlowUtils.FeesRequiredForPremiumNameException}
  * @error {@link DomainFlowUtils.InvalidIdnDomainLabelException}
  * @error {@link DomainFlowUtils.InvalidLrpTokenException}

java/google/registry/flows/domain/DomainFlowUtils.java

@@ -631,6 +631,9 @@ && isDomainPremium(domainName, priceTime)
     // This only happens when the total fees are non-zero and include custom fees requiring the
     // extension.
     if (feeCommand == null) {
+      if (!feesAndCredits.getEapCost().isZero()) {
+        throw new FeesRequiredDuringEarlyAccessProgramException(feesAndCredits.getEapCost());
+      }
       if (feesAndCredits.getTotalCost().isZero() || !feesAndCredits.isFeeExtensionRequired()) {
         return;
       }
@@ -1167,9 +1170,6 @@ static class FeesRequiredForPremiumNameException extends RequiredParameterMissin
 
   /** Fees must be explicitly acknowledged when performing an operation which is not free. */
   static class FeesRequiredForNonFreeOperationException extends RequiredParameterMissingException {
-    FeesRequiredForNonFreeOperationException() {
-      super("Fees must be explicitly acknowledged when performing an operation which is not free.");
-    }
 
     public FeesRequiredForNonFreeOperationException(Money expectedFee) {
       super(
@@ -1179,6 +1179,18 @@ public FeesRequiredForNonFreeOperationException(Money expectedFee) {
     }
   }
 
+  /** Fees must be explicitly acknowledged when creating domains during the Early Access Program. */
+  static class FeesRequiredDuringEarlyAccessProgramException
+      extends RequiredParameterMissingException {
+
+    public FeesRequiredDuringEarlyAccessProgramException(Money expectedFee) {
+      super(
+          "Fees must be explicitly acknowledged when creating domains "
+              + "during the Early Access Program. The EAP fee is: "
+              + expectedFee);
+    }
+  }
+
   /** The 'grace-period', 'applied' and 'refundable' fields are disallowed by server policy. */
   static class UnsupportedFeeAttributeException extends UnimplementedOptionException {
     UnsupportedFeeAttributeException() {

javatests/google/registry/flows/domain/DomainCreateFlowTest.java

@@ -43,6 +43,7 @@
 import static google.registry.testing.DatastoreHelper.persistResource;
 import static google.registry.testing.DomainResourceSubject.assertAboutDomains;
 import static google.registry.testing.EppExceptionSubject.assertAboutEppExceptions;
+import static google.registry.testing.JUnitBackports.expectThrows;
 import static google.registry.testing.TaskQueueHelper.assertDnsTasksEnqueued;
 import static google.registry.testing.TaskQueueHelper.assertNoDnsTasksEnqueued;
 import static google.registry.testing.TaskQueueHelper.assertNoTasksEnqueued;
@@ -82,6 +83,7 @@
 import google.registry.flows.domain.DomainFlowUtils.ExceedsMaxRegistrationYearsException;
 import google.registry.flows.domain.DomainFlowUtils.ExpiredClaimException;
 import google.registry.flows.domain.DomainFlowUtils.FeesMismatchException;
+import google.registry.flows.domain.DomainFlowUtils.FeesRequiredDuringEarlyAccessProgramException;
 import google.registry.flows.domain.DomainFlowUtils.FeesRequiredForPremiumNameException;
 import google.registry.flows.domain.DomainFlowUtils.InvalidIdnDomainLabelException;
 import google.registry.flows.domain.DomainFlowUtils.InvalidLrpTokenException;
@@ -1967,6 +1969,27 @@ public void testSuccess_eapFeeApplied_v12() throws Exception {
         "tld", "domain_create_response_eap_fee.xml", ImmutableMap.of("FEE_VERSION", "0.12"));
   }
 
+  @Test
+  public void testFailure_domainInEap_failsWithoutFeeExtension() throws Exception {
+    persistContactsAndHosts();
+    persistResource(
+        Registry.get("tld")
+            .asBuilder()
+            .setEapFeeSchedule(
+                ImmutableSortedMap.of(
+                    START_OF_TIME, Money.of(USD, 0),
+                    clock.nowUtc().minusDays(1), Money.of(USD, 100),
+                    clock.nowUtc().plusDays(1), Money.of(USD, 0)))
+            .build());
+    Exception e = expectThrows(FeesRequiredDuringEarlyAccessProgramException.class, this::runFlow);
+    assertThat(e)
+        .hasMessageThat()
+        .isEqualTo(
+            "Fees must be explicitly acknowledged when creating domains "
+                + "during the Early Access Program. The EAP fee is: USD 100.00");
+
+  }
+
   @Test
   public void testSuccess_eapFee_beforeEntireSchedule() throws Exception {
     persistContactsAndHosts();