diff --git a/database/entity/0001-init_db/Balance.ts b/database/entity/0001-init_db/Balance.ts
index c1ca359f1..e0c1b7bd0 100644
--- a/database/entity/0001-init_db/Balance.ts
+++ b/database/entity/0001-init_db/Balance.ts
@@ -1,4 +1,5 @@
-import { BaseEntity, Entity, PrimaryGeneratedColumn, Column } from 'typeorm'
+import { BaseEntity, Entity, PrimaryGeneratedColumn, Column, JoinColumn, OneToOne } from 'typeorm'
+import { User } from '../User'
 
 @Entity('state_balances')
 export class Balance extends BaseEntity {
@@ -16,4 +17,8 @@ export class Balance extends BaseEntity {
 
   @Column({ type: 'bigint' })
   amount: number
+
+  @OneToOne(() => User, { nullable: false })
+  @JoinColumn({ name: 'user_id' })
+  user: User
 }
diff --git a/database/entity/0001-init_db/User.ts b/database/entity/0001-init_db/User.ts
index 7280dca40..545d4f5c5 100644
--- a/database/entity/0001-init_db/User.ts
+++ b/database/entity/0001-init_db/User.ts
@@ -1,4 +1,5 @@
-import { BaseEntity, Entity, PrimaryGeneratedColumn, Column } from 'typeorm'
+import { BaseEntity, Entity, PrimaryGeneratedColumn, Column, OneToOne } from 'typeorm'
+import { Balance } from '../Balance'
 
 // Moriz: I do not like the idea of having two user tables
 @Entity('state_users')
@@ -29,4 +30,7 @@ export class User extends BaseEntity {
 
   @Column()
   disabled: boolean
+
+  @OneToOne(() => Balance, (balance) => balance.user)
+  balance: Balance
 }
diff --git a/database/src/interface/TransactionContext.ts b/database/src/interface/TransactionContext.ts
index f43b57046..4cda149af 100644
--- a/database/src/interface/TransactionContext.ts
+++ b/database/src/interface/TransactionContext.ts
@@ -1,5 +1,6 @@
 import { TransactionSendCoin } from '../../entity/TransactionSendCoin'
 import { TransactionCreation } from '../../entity/TransactionCreation'
+import { User } from '../../entity/User'
 
 export interface TransactionContext {
   transactionTypeId?: number
@@ -10,3 +11,10 @@ export interface TransactionContext {
   transactionSendCoin?: TransactionSendCoin
   transactionCreation?: TransactionCreation
 }
+
+export interface BalanceContext {
+  modified?: Date
+  recordDate?: Date
+  amount?: number
+  user?: User
+}