diff --git a/backend/src/graphql/resolvers/TransactionResolver.ts b/backend/src/graphql/resolvers/TransactionResolver.ts
index 3762cccee..cd07a94f5 100644
--- a/backend/src/graphql/resolvers/TransactionResolver.ts
+++ b/backend/src/graphql/resolvers/TransactionResolver.ts
@@ -2,12 +2,13 @@
 /* eslint-disable @typescript-eslint/explicit-module-boundary-types */
 
 import { Resolver, Query, Args, Authorized, Ctx, Mutation } from 'type-graphql'
+import { getCustomRepository } from 'typeorm'
 import CONFIG from '../../config'
 import { TransactionList } from '../models/Transaction'
 import { TransactionListInput, TransactionSendArgs } from '../inputs/TransactionInput'
 import { apiGet, apiPost } from '../../apis/HttpRequest'
-import { User as dbUser } from '../../typeorm/entity/User'
-import { Balance as dbBalance } from '../../typeorm/entity/Balance'
+import { BalanceRepository } from '../../typeorm/repository/Balance'
+import { UserRepository } from '../../typeorm/repository/User'
 import listTransactions from './listTransactions'
 import { roundFloorFrom4 } from '../../util/round'
 import { calculateDecay } from '../../util/decay'
@@ -25,7 +26,8 @@ export class TransactionResolver {
     if (!result.success) throw new Error(result.data)
 
     // load user
-    const userEntity = await dbUser.findByPubkeyHex(result.data.user.public_hex)
+    const userRepository = getCustomRepository(UserRepository)
+    const userEntity = await userRepository.findByPubkeyHex(result.data.user.public_hex)
 
     const transactions = await listTransactions(firstPage, items, order, userEntity)
 
@@ -37,7 +39,8 @@ export class TransactionResolver {
     transactions.gdtSum = resultGDTSum.data.sum
 
     // get balance
-    const balanceEntity = await dbBalance.findByUser(userEntity.id)
+    const balanceRepository = getCustomRepository(BalanceRepository)
+    const balanceEntity = await balanceRepository.findByUser(userEntity.id)
     if (balanceEntity) {
       const now = new Date()
       transactions.balance = roundFloorFrom4(balanceEntity.amount)
diff --git a/backend/src/typeorm/entity/Transaction.ts b/backend/src/typeorm/entity/Transaction.ts
index d8b87828c..53dce4d08 100644
--- a/backend/src/typeorm/entity/Transaction.ts
+++ b/backend/src/typeorm/entity/Transaction.ts
@@ -27,19 +27,4 @@ export class Transaction extends BaseEntity {
 
   @OneToOne(() => TransactionCreation, (transactionCreation) => transactionCreation.transaction)
   transactionCreation: TransactionCreation
-
-  static async findByTransactionTypeId(transactionTypeId: number): Promise<Transaction[]> {
-    return this.createQueryBuilder('transaction')
-      .where('transaction.transactionTypeId = :transactionTypeId', {
-        transactionTypeId: transactionTypeId,
-      })
-      .getMany()
-  }
-
-  static async getDecayStartBlock(): Promise<Transaction | undefined> {
-    return this.createQueryBuilder('transaction')
-      .where('transaction.transactionTypeId = :transactionTypeId', { transactionTypeId: 9 })
-      .orderBy('received', 'ASC')
-      .getOne()
-  }
 }
diff --git a/backend/src/typeorm/repository/Transaction.ts b/backend/src/typeorm/repository/Transaction.ts
new file mode 100644
index 000000000..2c26fe7b5
--- /dev/null
+++ b/backend/src/typeorm/repository/Transaction.ts
@@ -0,0 +1,28 @@
+import { EntityRepository, Repository } from 'typeorm'
+import { Transaction } from '../entity/Transaction'
+
+@EntityRepository(Transaction)
+export class TransactionRepository extends Repository<Transaction> {
+  async findDecayStartBlock(): Promise<Transaction | undefined> {
+    return this.createQueryBuilder('transaction')
+      .where('transaction.transactionTypeId = :transactionTypeId', { transactionTypeId: 9 })
+      .orderBy('received', 'ASC')
+      .getOne()
+  }
+
+  async joinFullTransactionsByIds(transactionIds: number[]): Promise<Transaction[]> {
+    return this.createQueryBuilder('transaction')
+      .where('transaction.id IN (:...transactions)', { transactions: transactionIds })
+      .leftJoinAndSelect(
+        'transaction.transactionSendCoin',
+        'transactionSendCoin',
+        // 'transactionSendCoin.transaction_id = transaction.id',
+      )
+      .leftJoinAndSelect(
+        'transaction.transactionCreation',
+        'transactionCreation',
+        // 'transactionSendCoin.transaction_id = transaction.id',
+      )
+      .getMany()
+  }
+}