diff --git a/backend/services/auth-service/prisma/migrations/0002_add_synced_wallet_addresses/migration.sql b/backend/services/auth-service/prisma/migrations/0002_add_synced_wallet_addresses/migration.sql
new file mode 100644
index 00000000..4fa2db6c
--- /dev/null
+++ b/backend/services/auth-service/prisma/migrations/0002_add_synced_wallet_addresses/migration.sql
@@ -0,0 +1,27 @@
+-- CreateTable
+CREATE TABLE "synced_wallet_addresses" (
+    "id" BIGSERIAL NOT NULL,
+    "legacy_address_id" BIGINT NOT NULL,
+    "legacy_user_id" BIGINT NOT NULL,
+    "chain_type" TEXT NOT NULL,
+    "address" TEXT NOT NULL,
+    "public_key" TEXT NOT NULL,
+    "status" TEXT NOT NULL DEFAULT 'ACTIVE',
+    "legacy_bound_at" TIMESTAMP(3) NOT NULL,
+    "source_sequence_num" BIGINT NOT NULL,
+    "synced_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "synced_wallet_addresses_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "synced_wallet_addresses_legacy_address_id_key" ON "synced_wallet_addresses"("legacy_address_id");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "synced_wallet_addresses_legacy_user_id_chain_type_key" ON "synced_wallet_addresses"("legacy_user_id", "chain_type");
+
+-- CreateIndex
+CREATE INDEX "synced_wallet_addresses_legacy_user_id_idx" ON "synced_wallet_addresses"("legacy_user_id");
+
+-- CreateIndex
+CREATE INDEX "synced_wallet_addresses_chain_type_address_idx" ON "synced_wallet_addresses"("chain_type", "address");
diff --git a/backend/services/auth-service/prisma/schema.prisma b/backend/services/auth-service/prisma/schema.prisma
index a883a798..6aab3018 100644
--- a/backend/services/auth-service/prisma/schema.prisma
+++ b/backend/services/auth-service/prisma/schema.prisma
@@ -104,6 +104,33 @@ model SyncedLegacyUser {
   @@map("synced_legacy_users")
 }
 
+// ============================================================================
+// CDC 同步的 1.0 钱包地址（只读）
+// ============================================================================
+
+model SyncedWalletAddress {
+  id                BigInt    @id @default(autoincrement())
+
+  // 1.0 钱包地址数据
+  legacyAddressId   BigInt    @unique @map("legacy_address_id")  // 1.0 的 wallet_addresses.address_id
+  legacyUserId      BigInt    @map("legacy_user_id")             // 1.0 的 wallet_addresses.user_id
+  chainType         String    @map("chain_type")                 // KAVA, BSC 等
+  address           String                                       // 钱包地址
+  publicKey         String    @map("public_key")                 // MPC 公钥
+  status            String    @default("ACTIVE")                 // ACTIVE, DELETED
+
+  legacyBoundAt     DateTime  @map("legacy_bound_at")            // 1.0 绑定时间
+
+  // CDC 元数据
+  sourceSequenceNum BigInt    @map("source_sequence_num")
+  syncedAt          DateTime  @default(now()) @map("synced_at")
+
+  @@unique([legacyUserId, chainType])
+  @@index([legacyUserId])
+  @@index([chainType, address])
+  @@map("synced_wallet_addresses")
+}
+
 // ============================================================================
 // 刷新令牌
 // ============================================================================
diff --git a/backend/services/auth-service/src/api/api.module.ts b/backend/services/auth-service/src/api/api.module.ts
index 5313ad41..290601c1 100644
--- a/backend/services/auth-service/src/api/api.module.ts
+++ b/backend/services/auth-service/src/api/api.module.ts
@@ -9,6 +9,7 @@ import {
   UserController,
   HealthController,
   AdminController,
+  InternalController,
 } from './controllers';
 import { ApplicationModule } from '@/application';
 import { JwtAuthGuard } from '@/shared/guards/jwt-auth.guard';
@@ -35,6 +36,7 @@ import { JwtAuthGuard } from '@/shared/guards/jwt-auth.guard';
     UserController,
     HealthController,
     AdminController,
+    InternalController,
   ],
   providers: [JwtAuthGuard],
 })
diff --git a/backend/services/auth-service/src/api/controllers/index.ts b/backend/services/auth-service/src/api/controllers/index.ts
index 11d91974..4b6ec35d 100644
--- a/backend/services/auth-service/src/api/controllers/index.ts
+++ b/backend/services/auth-service/src/api/controllers/index.ts
@@ -5,3 +5,4 @@ export * from './kyc.controller';
 export * from './user.controller';
 export * from './health.controller';
 export * from './admin.controller';
+export * from './internal.controller';
diff --git a/backend/services/auth-service/src/api/controllers/internal.controller.ts b/backend/services/auth-service/src/api/controllers/internal.controller.ts
new file mode 100644
index 00000000..369f9e27
--- /dev/null
+++ b/backend/services/auth-service/src/api/controllers/internal.controller.ts
@@ -0,0 +1,50 @@
+import { Controller, Get, Param, NotFoundException, Logger } from '@nestjs/common';
+import { PrismaService } from '@/infrastructure/persistence/prisma/prisma.service';
+
+/**
+ * 内部 API - 供 2.0 服务间调用，不需要 JWT 认证
+ */
+@Controller('internal')
+export class InternalController {
+  private readonly logger = new Logger(InternalController.name);
+
+  constructor(private readonly prisma: PrismaService) {}
+
+  /**
+   * 根据 accountSequence 获取用户的 Kava 地址
+   * trading-service 创建卖单时调用
+   */
+  @Get('users/:accountSequence/kava-address')
+  async getUserKavaAddress(
+    @Param('accountSequence') accountSequence: string,
+  ): Promise<{ kavaAddress: string }> {
+    // 1. 通过 SyncedLegacyUser 查找 legacyId
+    const legacyUser = await this.prisma.syncedLegacyUser.findUnique({
+      where: { accountSequence },
+      select: { legacyId: true },
+    });
+
+    if (!legacyUser) {
+      this.logger.warn(`[Internal] Legacy user not found: ${accountSequence}`);
+      throw new NotFoundException(`用户未找到: ${accountSequence}`);
+    }
+
+    // 2. 通过 legacyUserId + chainType 查找 KAVA 钱包地址
+    const walletAddress = await this.prisma.syncedWalletAddress.findUnique({
+      where: {
+        legacyUserId_chainType: {
+          legacyUserId: legacyUser.legacyId,
+          chainType: 'KAVA',
+        },
+      },
+      select: { address: true, status: true },
+    });
+
+    if (!walletAddress || walletAddress.status !== 'ACTIVE') {
+      this.logger.warn(`[Internal] Kava address not found for: ${accountSequence}`);
+      throw new NotFoundException(`未找到 Kava 钱包地址: ${accountSequence}`);
+    }
+
+    return { kavaAddress: walletAddress.address };
+  }
+}
diff --git a/backend/services/auth-service/src/infrastructure/infrastructure.module.ts b/backend/services/auth-service/src/infrastructure/infrastructure.module.ts
index ca842176..bc0a80f6 100644
--- a/backend/services/auth-service/src/infrastructure/infrastructure.module.ts
+++ b/backend/services/auth-service/src/infrastructure/infrastructure.module.ts
@@ -7,7 +7,7 @@ import {
   PrismaRefreshTokenRepository,
   PrismaSmsVerificationRepository,
 } from './persistence/repositories';
-import { LegacyUserCdcConsumer } from './messaging/cdc';
+import { LegacyUserCdcConsumer, WalletAddressCdcConsumer } from './messaging/cdc';
 import { KafkaModule, KafkaProducerService } from './kafka';
 import { RedisService } from './redis';
 import {
@@ -24,6 +24,7 @@ import { ApplicationModule } from '@/application/application.module';
   providers: [
     // CDC
     LegacyUserCdcConsumer,
+    WalletAddressCdcConsumer,
 
     // Kafka Producer
     KafkaProducerService,
diff --git a/backend/services/auth-service/src/infrastructure/messaging/cdc/index.ts b/backend/services/auth-service/src/infrastructure/messaging/cdc/index.ts
index 2239ca9a..bd95ea03 100644
--- a/backend/services/auth-service/src/infrastructure/messaging/cdc/index.ts
+++ b/backend/services/auth-service/src/infrastructure/messaging/cdc/index.ts
@@ -1 +1,2 @@
 export * from './legacy-user-cdc.consumer';
+export * from './wallet-address-cdc.consumer';
diff --git a/backend/services/auth-service/src/infrastructure/messaging/cdc/wallet-address-cdc.consumer.ts b/backend/services/auth-service/src/infrastructure/messaging/cdc/wallet-address-cdc.consumer.ts
new file mode 100644
index 00000000..5edbf1a6
--- /dev/null
+++ b/backend/services/auth-service/src/infrastructure/messaging/cdc/wallet-address-cdc.consumer.ts
@@ -0,0 +1,243 @@
+import { Injectable, OnModuleInit, OnModuleDestroy, Logger } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { Kafka, Consumer, EachMessagePayload } from 'kafkajs';
+import { Prisma, PrismaClient } from '@prisma/client';
+import { PrismaService } from '@/infrastructure/persistence/prisma/prisma.service';
+
+/** Prisma 事务客户端类型 */
+type TransactionClient = Omit<
+  PrismaClient,
+  '$connect' | '$disconnect' | '$on' | '$transaction' | '$use' | '$extends'
+>;
+
+/**
+ * ExtractNewRecordState 转换后的消息格式
+ * 字段来自 identity-service 的 wallet_addresses 表 + Debezium 元数据
+ */
+interface UnwrappedCdcWalletAddress {
+  // 1.0 identity-service wallet_addresses 表字段
+  address_id: number;
+  user_id: number;
+  chain_type: string;
+  address: string;
+  public_key: string;
+  address_digest: string;
+  mpc_signature_r: string;
+  mpc_signature_s: string;
+  mpc_signature_v: number;
+  status: string;
+  bound_at: number;  // timestamp in milliseconds
+
+  // Debezium ExtractNewRecordState 添加的元数据字段
+  __op: 'c' | 'u' | 'd' | 'r';
+  __table: string;
+  __source_ts_ms: number;
+  __deleted?: string;
+}
+
+/**
+ * CDC Consumer - 消费 1.0 钱包地址变更事件
+ * 监听 Debezium 发送的 CDC 事件，同步到 synced_wallet_addresses 表
+ *
+ * 实现事务性幂等消费（Transactional Idempotent Consumer）确保：
+ * - 每个 CDC 事件只处理一次（exactly-once 语义）
+ * - 幂等记录（processed_cdc_events）和业务逻辑在同一事务中执行
+ * - 任何失败都会导致整个事务回滚
+ */
+@Injectable()
+export class WalletAddressCdcConsumer implements OnModuleInit, OnModuleDestroy {
+  private readonly logger = new Logger(WalletAddressCdcConsumer.name);
+  private kafka: Kafka;
+  private consumer: Consumer;
+  private isConnected = false;
+  private topic: string;
+
+  constructor(
+    private readonly configService: ConfigService,
+    private readonly prisma: PrismaService,
+  ) {
+    const brokers = this.configService.get<string>('KAFKA_BROKERS', 'localhost:9092').split(',');
+
+    this.kafka = new Kafka({
+      clientId: 'auth-service-cdc-wallet',
+      brokers,
+    });
+
+    this.consumer = this.kafka.consumer({
+      groupId: this.configService.get<string>('CDC_CONSUMER_GROUP', 'auth-service-cdc-group') + '-wallet',
+    });
+
+    this.topic = this.configService.get<string>(
+      'CDC_TOPIC_WALLET_ADDRESSES',
+      'cdc.identity.public.wallet_addresses',
+    );
+  }
+
+  async onModuleInit() {
+    if (this.configService.get('CDC_ENABLED', 'true') !== 'true') {
+      this.logger.log('Wallet Address CDC Consumer is disabled');
+      return;
+    }
+
+    try {
+      await this.consumer.connect();
+      this.isConnected = true;
+
+      await this.consumer.subscribe({ topic: this.topic, fromBeginning: true });
+
+      await this.consumer.run({
+        eachMessage: async (payload) => {
+          await this.handleMessage(payload);
+        },
+      });
+
+      this.logger.log(
+        `Wallet Address CDC Consumer started, listening to topic: ${this.topic}`,
+      );
+    } catch (error) {
+      this.logger.error('Failed to start Wallet Address CDC Consumer', error);
+    }
+  }
+
+  async onModuleDestroy() {
+    if (this.isConnected) {
+      await this.consumer.disconnect();
+      this.logger.log('Wallet Address CDC Consumer disconnected');
+    }
+  }
+
+  private async handleMessage(payload: EachMessagePayload) {
+    const { topic, partition, message } = payload;
+
+    if (!message.value) return;
+
+    const offset = BigInt(message.offset);
+    const idempotencyKey = `${topic}:${offset}`;
+
+    try {
+      const cdcEvent: UnwrappedCdcWalletAddress = JSON.parse(message.value.toString());
+      const op = cdcEvent.__op;
+      const tableName = cdcEvent.__table || 'wallet_addresses';
+
+      this.logger.log(`[CDC] Processing wallet address event: topic=${topic}, offset=${offset}, op=${op}`);
+
+      await this.processWithIdempotency(topic, offset, tableName, op, cdcEvent);
+
+      this.logger.log(`[CDC] Successfully processed wallet address event: ${idempotencyKey}`);
+    } catch (error: any) {
+      if (error.code === 'P2002') {
+        this.logger.debug(`[CDC] Skipping duplicate wallet address event: ${idempotencyKey}`);
+        return;
+      }
+      this.logger.error(
+        `[CDC] Failed to process wallet address message from ${topic}[${partition}], offset=${offset}`,
+        error,
+      );
+    }
+  }
+
+  /**
+   * 事务性幂等处理
+   */
+  private async processWithIdempotency(
+    topic: string,
+    offset: bigint,
+    tableName: string,
+    operation: string,
+    event: UnwrappedCdcWalletAddress,
+  ): Promise<void> {
+    await this.prisma.$transaction(async (tx) => {
+      // 1. 尝试插入幂等记录
+      try {
+        await tx.processedCdcEvent.create({
+          data: {
+            sourceTopic: topic,
+            offset: offset,
+            tableName: tableName,
+            operation: operation,
+          },
+        });
+      } catch (error: any) {
+        if (error.code === 'P2002') {
+          this.logger.debug(`[CDC] Wallet address event already processed: ${topic}:${offset}`);
+          return;
+        }
+        throw error;
+      }
+
+      // 2. 执行业务逻辑
+      await this.processCdcEvent(event, offset, tx);
+    }, {
+      isolationLevel: Prisma.TransactionIsolationLevel.Serializable,
+      timeout: 30000,
+    });
+  }
+
+  private async processCdcEvent(
+    event: UnwrappedCdcWalletAddress,
+    sequenceNum: bigint,
+    tx: TransactionClient,
+  ): Promise<void> {
+    const op = event.__op;
+    const isDeleted = event.__deleted === 'true';
+
+    if (isDeleted || op === 'd') {
+      await this.deleteWalletAddress(event.address_id, tx);
+      return;
+    }
+
+    switch (op) {
+      case 'c':
+      case 'r':
+      case 'u':
+        await this.upsertWalletAddress(event, sequenceNum, tx);
+        break;
+    }
+  }
+
+  private async upsertWalletAddress(
+    walletAddress: UnwrappedCdcWalletAddress,
+    sequenceNum: bigint,
+    tx: TransactionClient,
+  ): Promise<void> {
+    await tx.syncedWalletAddress.upsert({
+      where: { legacyAddressId: BigInt(walletAddress.address_id) },
+      update: {
+        legacyUserId: BigInt(walletAddress.user_id),
+        chainType: walletAddress.chain_type,
+        address: walletAddress.address,
+        publicKey: walletAddress.public_key,
+        status: walletAddress.status,
+        sourceSequenceNum: sequenceNum,
+        syncedAt: new Date(),
+      },
+      create: {
+        legacyAddressId: BigInt(walletAddress.address_id),
+        legacyUserId: BigInt(walletAddress.user_id),
+        chainType: walletAddress.chain_type,
+        address: walletAddress.address,
+        publicKey: walletAddress.public_key,
+        status: walletAddress.status,
+        legacyBoundAt: new Date(walletAddress.bound_at),
+        sourceSequenceNum: sequenceNum,
+      },
+    });
+
+    this.logger.debug(
+      `[CDC] Synced wallet address: addressId=${walletAddress.address_id}, chain=${walletAddress.chain_type}`,
+    );
+  }
+
+  private async deleteWalletAddress(addressId: number, tx: TransactionClient): Promise<void> {
+    try {
+      await tx.syncedWalletAddress.update({
+        where: { legacyAddressId: BigInt(addressId) },
+        data: { status: 'DELETED' },
+      });
+
+      this.logger.debug(`[CDC] Marked wallet address as deleted: ${addressId}`);
+    } catch (error) {
+      this.logger.error(`[CDC] Failed to mark wallet address as deleted: ${addressId}`, error);
+    }
+  }
+}
diff --git a/backend/services/docker-compose.2.0.yml b/backend/services/docker-compose.2.0.yml
index c2b7cffa..f2dacae7 100644
--- a/backend/services/docker-compose.2.0.yml
+++ b/backend/services/docker-compose.2.0.yml
@@ -112,6 +112,7 @@ services:
       KAFKA_BROKERS: kafka:29092
       # 2.0 内部服务调用
       MINING_SERVICE_URL: http://mining-service:3021
+      AUTH_SERVICE_URL: http://auth-service:3024
       # JWT 配置 (与 auth-service 共享密钥以验证 token)
       JWT_SECRET: ${JWT_SECRET:-your-jwt-secret-change-in-production}
     ports:
@@ -188,6 +189,7 @@ services:
       KAFKA_BROKERS: kafka:29092
       CDC_ENABLED: "true"
       CDC_TOPIC_USERS: ${CDC_TOPIC_USERS:-cdc.identity.public.user_accounts}
+      CDC_TOPIC_WALLET_ADDRESSES: ${CDC_TOPIC_WALLET_ADDRESSES:-cdc.identity.public.wallet_addresses}
       CDC_CONSUMER_GROUP: auth-service-cdc-group
       # JWT 配置
       JWT_SECRET: ${JWT_SECRET:-your-jwt-secret-change-in-production}
diff --git a/backend/services/trading-service/src/infrastructure/identity/identity.client.ts b/backend/services/trading-service/src/infrastructure/identity/identity.client.ts
index 59e99123..0065b3a9 100644
--- a/backend/services/trading-service/src/infrastructure/identity/identity.client.ts
+++ b/backend/services/trading-service/src/infrastructure/identity/identity.client.ts
@@ -12,7 +12,7 @@ export interface UserInfo {
 }
 
 /**
- * Identity 服务客户端
+ * Auth 服务客户端（通过 auth-service 内部 API 获取用户信息）
  * 用于获取用户信息，包括 Kava 地址
  */
 @Injectable()
@@ -25,25 +25,28 @@ export class IdentityClient {
     private readonly configService: ConfigService,
   ) {
     this.baseUrl = this.configService.get<string>(
-      'IDENTITY_SERVICE_URL',
-      'http://localhost:3001',
+      'AUTH_SERVICE_URL',
+      'http://localhost:3024',
     );
-    this.logger.log(`[INIT] IdentityClient initialized with URL: ${this.baseUrl}`);
+    this.logger.log(`[INIT] IdentityClient initialized with auth-service URL: ${this.baseUrl}`);
   }
 
   /**
-   * 获取用户的 Kava 地址
+   * 获取用户的 Kava 地址（调用 auth-service 内部 API）
    * @param accountSequence 用户账户序列号
    */
   async getUserKavaAddress(accountSequence: string): Promise<string | null> {
     try {
-      const response: AxiosResponse<{ kavaAddress?: string }> = await firstValueFrom(
-        this.httpService.get<{ kavaAddress?: string }>(
-          `${this.baseUrl}/api/v1/internal/user/${accountSequence}/kava-address`,
-        ),
-      );
+      // auth-service TransformInterceptor 会包装响应为 { success, data: { kavaAddress }, timestamp }
+      const response: AxiosResponse<{ data?: { kavaAddress?: string }; kavaAddress?: string }> =
+        await firstValueFrom(
+          this.httpService.get(
+            `${this.baseUrl}/api/v2/internal/users/${accountSequence}/kava-address`,
+          ),
+        );
 
-      return response.data?.kavaAddress || null;
+      const body = response.data;
+      return body?.data?.kavaAddress || body?.kavaAddress || null;
     } catch (error: any) {
       this.logger.error(`Failed to get Kava address for ${accountSequence}: ${error.message}`);
       return null;
@@ -56,13 +59,15 @@ export class IdentityClient {
    */
   async getUserInfo(accountSequence: string): Promise<UserInfo | null> {
     try {
-      const response: AxiosResponse<UserInfo> = await firstValueFrom(
-        this.httpService.get<UserInfo>(
-          `${this.baseUrl}/api/v1/internal/user/${accountSequence}`,
+      // auth-service TransformInterceptor 会包装响应为 { success, data: {...}, timestamp }
+      const response: AxiosResponse<{ data?: UserInfo } & UserInfo> = await firstValueFrom(
+        this.httpService.get(
+          `${this.baseUrl}/api/v2/internal/users/${accountSequence}`,
         ),
       );
 
-      return response.data;
+      const body = response.data;
+      return body?.data || body || null;
     } catch (error: any) {
       this.logger.error(`Failed to get user info for ${accountSequence}: ${error.message}`);
       return null;