/*
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: google/cloud/confidentialcomputing/v1alpha1/service.proto

package com.google.cloud.confidentialcomputing.v1alpha1;

/**
 *
 *
 * <pre>
 * A Challenge from the server used to guarantee freshness of attestations
 * </pre>
 *
 * Protobuf type {@code google.cloud.confidentialcomputing.v1alpha1.Challenge}
 */
public final class Challenge extends com.google.protobuf.GeneratedMessageV3
    implements
    // @@protoc_insertion_point(message_implements:google.cloud.confidentialcomputing.v1alpha1.Challenge)
    ChallengeOrBuilder {
  private static final long serialVersionUID = 0L;
  // Use Challenge.newBuilder() to construct.
  private Challenge(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
    super(builder);
  }

  private Challenge() {
    name_ = "";
    nonce_ = com.google.protobuf.ByteString.EMPTY;
  }

  @java.lang.Override
  @SuppressWarnings({"unused"})
  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
    return new Challenge();
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    return this.unknownFields;
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  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    return com.google.cloud.confidentialcomputing.v1alpha1.ServiceProto
        .internal_static_google_cloud_confidentialcomputing_v1alpha1_Challenge_descriptor;
  }

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  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
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  public static final int NAME_FIELD_NUMBER = 1;

  @SuppressWarnings("serial")
  private volatile java.lang.Object name_ = "";
  /**
   *
   *
   * <pre>
   * Output only. The resource name for this Challenge in the format
   * `projects/&#42;&#47;locations/&#42;&#47;challenges/&#42;`
   * </pre>
   *
   * <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
   *
   * @return The name.
   */
  @java.lang.Override
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      name_ = s;
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  }
  /**
   *
   *
   * <pre>
   * Output only. The resource name for this Challenge in the format
   * `projects/&#42;&#47;locations/&#42;&#47;challenges/&#42;`
   * </pre>
   *
   * <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
   *
   * @return The bytes for name.
   */
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  /**
   *
   *
   * <pre>
   * Output only. The time at which this Challenge was created
   * </pre>
   *
   * <code>.google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
   * </code>
   *
   * @return Whether the createTime field is set.
   */
  @java.lang.Override
  public boolean hasCreateTime() {
    return createTime_ != null;
  }
  /**
   *
   *
   * <pre>
   * Output only. The time at which this Challenge was created
   * </pre>
   *
   * <code>.google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
   * </code>
   *
   * @return The createTime.
   */
  @java.lang.Override
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  }
  /**
   *
   *
   * <pre>
   * Output only. The time at which this Challenge was created
   * </pre>
   *
   * <code>.google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
   * </code>
   */
  @java.lang.Override
  public com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder() {
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  public static final int EXPIRE_TIME_FIELD_NUMBER = 3;
  private com.google.protobuf.Timestamp expireTime_;
  /**
   *
   *
   * <pre>
   * Output only. The time at which this Challenge will no longer be usable. It
   * is also the expiration time for any tokens generated from this Challenge.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
   * </code>
   *
   * @return Whether the expireTime field is set.
   */
  @java.lang.Override
  public boolean hasExpireTime() {
    return expireTime_ != null;
  }
  /**
   *
   *
   * <pre>
   * Output only. The time at which this Challenge will no longer be usable. It
   * is also the expiration time for any tokens generated from this Challenge.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
   * </code>
   *
   * @return The expireTime.
   */
  @java.lang.Override
  public com.google.protobuf.Timestamp getExpireTime() {
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  }
  /**
   *
   *
   * <pre>
   * Output only. The time at which this Challenge will no longer be usable. It
   * is also the expiration time for any tokens generated from this Challenge.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
   * </code>
   */
  @java.lang.Override
  public com.google.protobuf.TimestampOrBuilder getExpireTimeOrBuilder() {
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  }

  public static final int USED_FIELD_NUMBER = 4;
  private boolean used_ = false;
  /**
   *
   *
   * <pre>
   * Output only. Indicates if this challenge has been used to generate a token.
   * </pre>
   *
   * <code>bool used = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
   *
   * @return The used.
   */
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   *
   *
   * <pre>
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   *
   * <code>bytes nonce = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
   *
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  @java.lang.Override
  public boolean equals(final java.lang.Object obj) {
    if (obj == this) {
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  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
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  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }

  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
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      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }

  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
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      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
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  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(byte[] data)
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    return PARSER.parseFrom(data);
  }

  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
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      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }

  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
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    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
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  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
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      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
        PARSER, input, extensionRegistry);
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  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseDelimitedFrom(
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    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
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  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseDelimitedFrom(
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  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
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    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
  }

  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge parseFrom(
      com.google.protobuf.CodedInputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
        PARSER, input, extensionRegistry);
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  @java.lang.Override
  public Builder newBuilderForType() {
    return newBuilder();
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  public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }

  public static Builder newBuilder(
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  }

  @java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }

  @java.lang.Override
  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
    Builder builder = new Builder(parent);
    return builder;
  }
  /**
   *
   *
   * <pre>
   * A Challenge from the server used to guarantee freshness of attestations
   * </pre>
   *
   * Protobuf type {@code google.cloud.confidentialcomputing.v1alpha1.Challenge}
   */
  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
      implements
      // @@protoc_insertion_point(builder_implements:google.cloud.confidentialcomputing.v1alpha1.Challenge)
      com.google.cloud.confidentialcomputing.v1alpha1.ChallengeOrBuilder {
    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
      return com.google.cloud.confidentialcomputing.v1alpha1.ServiceProto
          .internal_static_google_cloud_confidentialcomputing_v1alpha1_Challenge_descriptor;
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    /**
     *
     *
     * <pre>
     * Output only. The resource name for this Challenge in the format
     * `projects/&#42;&#47;locations/&#42;&#47;challenges/&#42;`
     * </pre>
     *
     * <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
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    /**
     *
     *
     * <pre>
     * Output only. The resource name for this Challenge in the format
     * `projects/&#42;&#47;locations/&#42;&#47;challenges/&#42;`
     * </pre>
     *
     * <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
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    /**
     *
     *
     * <pre>
     * Output only. The resource name for this Challenge in the format
     * `projects/&#42;&#47;locations/&#42;&#47;challenges/&#42;`
     * </pre>
     *
     * <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @param value The name to set.
     * @return This builder for chaining.
     */
    public Builder setName(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      name_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The resource name for this Challenge in the format
     * `projects/&#42;&#47;locations/&#42;&#47;challenges/&#42;`
     * </pre>
     *
     * <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearName() {
      name_ = getDefaultInstance().getName();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The resource name for this Challenge in the format
     * `projects/&#42;&#47;locations/&#42;&#47;challenges/&#42;`
     * </pre>
     *
     * <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @param value The bytes for name to set.
     * @return This builder for chaining.
     */
    public Builder setNameBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      name_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }

    private com.google.protobuf.Timestamp createTime_;
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp,
            com.google.protobuf.Timestamp.Builder,
            com.google.protobuf.TimestampOrBuilder>
        createTimeBuilder_;
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     *
     * @return Whether the createTime field is set.
     */
    public boolean hasCreateTime() {
      return ((bitField0_ & 0x00000002) != 0);
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     *
     * @return The createTime.
     */
    public com.google.protobuf.Timestamp getCreateTime() {
      if (createTimeBuilder_ == null) {
        return createTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : createTime_;
      } else {
        return createTimeBuilder_.getMessage();
      }
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public Builder setCreateTime(com.google.protobuf.Timestamp value) {
      if (createTimeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        createTime_ = value;
      } else {
        createTimeBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public Builder setCreateTime(com.google.protobuf.Timestamp.Builder builderForValue) {
      if (createTimeBuilder_ == null) {
        createTime_ = builderForValue.build();
      } else {
        createTimeBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public Builder mergeCreateTime(com.google.protobuf.Timestamp value) {
      if (createTimeBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && createTime_ != null
            && createTime_ != com.google.protobuf.Timestamp.getDefaultInstance()) {
          getCreateTimeBuilder().mergeFrom(value);
        } else {
          createTime_ = value;
        }
      } else {
        createTimeBuilder_.mergeFrom(value);
      }
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public Builder clearCreateTime() {
      bitField0_ = (bitField0_ & ~0x00000002);
      createTime_ = null;
      if (createTimeBuilder_ != null) {
        createTimeBuilder_.dispose();
        createTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public com.google.protobuf.Timestamp.Builder getCreateTimeBuilder() {
      bitField0_ |= 0x00000002;
      onChanged();
      return getCreateTimeFieldBuilder().getBuilder();
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder() {
      if (createTimeBuilder_ != null) {
        return createTimeBuilder_.getMessageOrBuilder();
      } else {
        return createTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : createTime_;
      }
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge was created
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp create_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp,
            com.google.protobuf.Timestamp.Builder,
            com.google.protobuf.TimestampOrBuilder>
        getCreateTimeFieldBuilder() {
      if (createTimeBuilder_ == null) {
        createTimeBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Timestamp,
                com.google.protobuf.Timestamp.Builder,
                com.google.protobuf.TimestampOrBuilder>(
                getCreateTime(), getParentForChildren(), isClean());
        createTime_ = null;
      }
      return createTimeBuilder_;
    }

    private com.google.protobuf.Timestamp expireTime_;
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp,
            com.google.protobuf.Timestamp.Builder,
            com.google.protobuf.TimestampOrBuilder>
        expireTimeBuilder_;
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     *
     * @return Whether the expireTime field is set.
     */
    public boolean hasExpireTime() {
      return ((bitField0_ & 0x00000004) != 0);
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     *
     * @return The expireTime.
     */
    public com.google.protobuf.Timestamp getExpireTime() {
      if (expireTimeBuilder_ == null) {
        return expireTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : expireTime_;
      } else {
        return expireTimeBuilder_.getMessage();
      }
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public Builder setExpireTime(com.google.protobuf.Timestamp value) {
      if (expireTimeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        expireTime_ = value;
      } else {
        expireTimeBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public Builder setExpireTime(com.google.protobuf.Timestamp.Builder builderForValue) {
      if (expireTimeBuilder_ == null) {
        expireTime_ = builderForValue.build();
      } else {
        expireTimeBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public Builder mergeExpireTime(com.google.protobuf.Timestamp value) {
      if (expireTimeBuilder_ == null) {
        if (((bitField0_ & 0x00000004) != 0)
            && expireTime_ != null
            && expireTime_ != com.google.protobuf.Timestamp.getDefaultInstance()) {
          getExpireTimeBuilder().mergeFrom(value);
        } else {
          expireTime_ = value;
        }
      } else {
        expireTimeBuilder_.mergeFrom(value);
      }
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public Builder clearExpireTime() {
      bitField0_ = (bitField0_ & ~0x00000004);
      expireTime_ = null;
      if (expireTimeBuilder_ != null) {
        expireTimeBuilder_.dispose();
        expireTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public com.google.protobuf.Timestamp.Builder getExpireTimeBuilder() {
      bitField0_ |= 0x00000004;
      onChanged();
      return getExpireTimeFieldBuilder().getBuilder();
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    public com.google.protobuf.TimestampOrBuilder getExpireTimeOrBuilder() {
      if (expireTimeBuilder_ != null) {
        return expireTimeBuilder_.getMessageOrBuilder();
      } else {
        return expireTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : expireTime_;
      }
    }
    /**
     *
     *
     * <pre>
     * Output only. The time at which this Challenge will no longer be usable. It
     * is also the expiration time for any tokens generated from this Challenge.
     * </pre>
     *
     * <code>
     * .google.protobuf.Timestamp expire_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
     * </code>
     */
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp,
            com.google.protobuf.Timestamp.Builder,
            com.google.protobuf.TimestampOrBuilder>
        getExpireTimeFieldBuilder() {
      if (expireTimeBuilder_ == null) {
        expireTimeBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Timestamp,
                com.google.protobuf.Timestamp.Builder,
                com.google.protobuf.TimestampOrBuilder>(
                getExpireTime(), getParentForChildren(), isClean());
        expireTime_ = null;
      }
      return expireTimeBuilder_;
    }

    private boolean used_;
    /**
     *
     *
     * <pre>
     * Output only. Indicates if this challenge has been used to generate a token.
     * </pre>
     *
     * <code>bool used = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @return The used.
     */
    @java.lang.Override
    public boolean getUsed() {
      return used_;
    }
    /**
     *
     *
     * <pre>
     * Output only. Indicates if this challenge has been used to generate a token.
     * </pre>
     *
     * <code>bool used = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @param value The used to set.
     * @return This builder for chaining.
     */
    public Builder setUsed(boolean value) {

      used_ = value;
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. Indicates if this challenge has been used to generate a token.
     * </pre>
     *
     * <code>bool used = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearUsed() {
      bitField0_ = (bitField0_ & ~0x00000008);
      used_ = false;
      onChanged();
      return this;
    }

    private com.google.protobuf.ByteString nonce_ = com.google.protobuf.ByteString.EMPTY;
    /**
     *
     *
     * <pre>
     * Output only. Random data which should be used when calling TPM2_Quote.
     * --
     * </pre>
     *
     * <code>bytes nonce = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @return The nonce.
     */
    @java.lang.Override
    public com.google.protobuf.ByteString getNonce() {
      return nonce_;
    }
    /**
     *
     *
     * <pre>
     * Output only. Random data which should be used when calling TPM2_Quote.
     * --
     * </pre>
     *
     * <code>bytes nonce = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @param value The nonce to set.
     * @return This builder for chaining.
     */
    public Builder setNonce(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      nonce_ = value;
      bitField0_ |= 0x00000010;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Output only. Random data which should be used when calling TPM2_Quote.
     * --
     * </pre>
     *
     * <code>bytes nonce = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearNonce() {
      bitField0_ = (bitField0_ & ~0x00000010);
      nonce_ = getDefaultInstance().getNonce();
      onChanged();
      return this;
    }

    @java.lang.Override
    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.setUnknownFields(unknownFields);
    }

    @java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }

    // @@protoc_insertion_point(builder_scope:google.cloud.confidentialcomputing.v1alpha1.Challenge)
  }

  // @@protoc_insertion_point(class_scope:google.cloud.confidentialcomputing.v1alpha1.Challenge)
  private static final com.google.cloud.confidentialcomputing.v1alpha1.Challenge DEFAULT_INSTANCE;

  static {
    DEFAULT_INSTANCE = new com.google.cloud.confidentialcomputing.v1alpha1.Challenge();
  }

  public static com.google.cloud.confidentialcomputing.v1alpha1.Challenge getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }

  private static final com.google.protobuf.Parser<Challenge> PARSER =
      new com.google.protobuf.AbstractParser<Challenge>() {
        @java.lang.Override
        public Challenge parsePartialFrom(
            com.google.protobuf.CodedInputStream input,
            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
            throws com.google.protobuf.InvalidProtocolBufferException {
          Builder builder = newBuilder();
          try {
            builder.mergeFrom(input, extensionRegistry);
          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
            throw e.setUnfinishedMessage(builder.buildPartial());
          } catch (com.google.protobuf.UninitializedMessageException e) {
            throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
          } catch (java.io.IOException e) {
            throw new com.google.protobuf.InvalidProtocolBufferException(e)
                .setUnfinishedMessage(builder.buildPartial());
          }
          return builder.buildPartial();
        }
      };

  public static com.google.protobuf.Parser<Challenge> parser() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.protobuf.Parser<Challenge> getParserForType() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.cloud.confidentialcomputing.v1alpha1.Challenge getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }
}
