diff --git a/dlt-connector/src/data/Transaction.builder.ts b/dlt-connector/src/data/Transaction.builder.ts
index 4b1b385ab..321dda76b 100644
--- a/dlt-connector/src/data/Transaction.builder.ts
+++ b/dlt-connector/src/data/Transaction.builder.ts
@@ -8,6 +8,7 @@ import { CommunityRepository } from './Community.repository'
 import { LogError } from '@/server/LogError'
 import { Account } from '@entity/Account'
 import { Community } from '@entity/Community'
+import { TransactionBodyBuilder } from './proto/TransactionBody.builder'
 
 export class TransactionBuilder {
   private transaction: Transaction
@@ -50,6 +51,10 @@ export class TransactionBuilder {
     return this.transaction
   }
 
+  public getSenderCommunity(): Community {
+    return this.transaction.senderCommunity
+  }
+
   public setSigningAccount(signingAccount: Account): TransactionBuilder {
     this.transaction.signingAccount = signingAccount
     return this
@@ -84,6 +89,11 @@ export class TransactionBuilder {
     return this
   }
 
+  public setBackendTransactionId(backendTransactionId: number): TransactionBuilder {
+    this.transaction.backendTransactionId = backendTransactionId
+    return this
+  }
+
   public async setSenderCommunityFromSenderUser(
     senderUser: UserIdentifier,
   ): Promise<TransactionBuilder> {
@@ -144,4 +154,19 @@ export class TransactionBuilder {
     this.transaction.bodyBytes ??= transactionBodyToBodyBytes(transactionBody)
     return this
   }
+
+  public fromTransactionBodyBuilder(
+    transactionBodyBuilder: TransactionBodyBuilder,
+  ): TransactionBuilder {
+    const signingAccount = transactionBodyBuilder.getSigningAccount()
+    if (signingAccount) {
+      this.setSigningAccount(signingAccount)
+    }
+    const recipientAccount = transactionBodyBuilder.getRecipientAccount()
+    if (recipientAccount) {
+      this.setRecipientAccount(recipientAccount)
+    }
+    this.fromTransactionBody(transactionBodyBuilder.getTransactionBody())
+    return this
+  }
 }
diff --git a/dlt-connector/src/data/proto/TransactionBody.builder.ts b/dlt-connector/src/data/proto/TransactionBody.builder.ts
index 5f2681824..b0e0a9f79 100644
--- a/dlt-connector/src/data/proto/TransactionBody.builder.ts
+++ b/dlt-connector/src/data/proto/TransactionBody.builder.ts
@@ -25,6 +25,8 @@ export class TransactionBodyBuilder {
 
   public reset(): void {
     this.body = undefined
+    this.signingAccount = undefined
+    this.recipientAccount = undefined
   }
 
   /**
@@ -42,14 +44,26 @@ export class TransactionBodyBuilder {
    * client code before disposing of the previous result.
    */
   public build(): TransactionBody {
-    const result = this.body
-    if (!result) {
+    const result = this.getTransactionBody()
+    this.reset()
+    return result
+  }
+
+  public getTransactionBody(): TransactionBody {
+    if (!this.body) {
       throw new LogError(
         'cannot build Transaction Body, missing information, please call at least fromTransactionDraft or fromCommunityDraft',
       )
     }
-    this.reset()
-    return result
+    return this.body
+  }
+
+  public getSigningAccount(): Account | undefined {
+    return this.signingAccount
+  }
+
+  public getRecipientAccount(): Account | undefined {
+    return this.recipientAccount
   }
 
   public setSigningAccount(signingAccount: Account): TransactionBodyBuilder {
@@ -67,11 +81,17 @@ export class TransactionBodyBuilder {
     // TODO: load pubkeys for sender and recipient user from db
     switch (transactionDraft.type) {
       case InputTransactionType.CREATION:
+        if (!this.recipientAccount) {
+          throw new LogError('missing recipient account for creation transaction!')
+        }
         this.body.creation = new GradidoCreation(transactionDraft, this.recipientAccount)
         this.body.data = 'gradidoCreation'
         break
       case InputTransactionType.SEND:
       case InputTransactionType.RECEIVE:
+        if (!this.recipientAccount || !this.signingAccount) {
+          throw new LogError('missing signing and/or recipient account for transfer transaction!')
+        }
         this.body.transfer = new GradidoTransfer(
           transactionDraft,
           this.signingAccount,
diff --git a/dlt-connector/src/graphql/enum/TransactionErrorType.ts b/dlt-connector/src/graphql/enum/TransactionErrorType.ts
index 7f1902c3d..8238eae08 100644
--- a/dlt-connector/src/graphql/enum/TransactionErrorType.ts
+++ b/dlt-connector/src/graphql/enum/TransactionErrorType.ts
@@ -7,6 +7,9 @@ export enum TransactionErrorType {
   DB_ERROR = 'DB Error',
   PROTO_DECODE_ERROR = 'Proto Decode Error',
   PROTO_ENCODE_ERROR = 'Proto Encode Error',
+  INVALID_SIGNATURE = 'Invalid Signature',
+  LOGIC_ERROR = 'Logic Error',
+  NOT_FOUND = 'Not found',
 }
 
 registerEnumType(TransactionErrorType, {
diff --git a/dlt-connector/src/graphql/input/TransactionDraft.ts b/dlt-connector/src/graphql/input/TransactionDraft.ts
index a94c57354..3cd497eec 100755
--- a/dlt-connector/src/graphql/input/TransactionDraft.ts
+++ b/dlt-connector/src/graphql/input/TransactionDraft.ts
@@ -2,11 +2,11 @@
 
 import { Decimal } from 'decimal.js-light'
 import { InputTransactionType } from '@enum/InputTransactionType'
-import { InputType, Field } from 'type-graphql'
+import { InputType, Field, Int } from 'type-graphql'
 import { UserIdentifier } from './UserIdentifier'
 import { isValidDateString } from '@validator/DateString'
 import { IsPositiveDecimal } from '@validator/Decimal'
-import { IsEnum, IsObject, ValidateNested } from 'class-validator'
+import { IsEnum, IsObject, IsPositive, ValidateNested } from 'class-validator'
 
 @InputType()
 export class TransactionDraft {
@@ -20,6 +20,10 @@ export class TransactionDraft {
   @ValidateNested()
   recipientUser: UserIdentifier
 
+  @Field(() => Int)
+  @IsPositive()
+  backendTransactionId: number
+
   @Field(() => Decimal)
   @IsPositiveDecimal()
   amount: Decimal
diff --git a/dlt-connector/src/graphql/model/TransactionRecipe.ts b/dlt-connector/src/graphql/model/TransactionRecipe.ts
index e5e1c74fc..3b37ba4ea 100644
--- a/dlt-connector/src/graphql/model/TransactionRecipe.ts
+++ b/dlt-connector/src/graphql/model/TransactionRecipe.ts
@@ -1,10 +1,10 @@
 import { Field, Int, ObjectType } from 'type-graphql'
-import { TransactionRecipe as TransactionRecipeEntity } from '@entity/TransactionRecipe'
 import { TransactionType } from '@enum/TransactionType'
+import { Transaction } from '@entity/Transaction'
 
 @ObjectType()
 export class TransactionRecipe {
-  public constructor({ id, createdAt, type, senderCommunity }: TransactionRecipeEntity) {
+  public constructor({ id, createdAt, type, senderCommunity }: Transaction) {
     this.id = id
     this.createdAt = createdAt.toString()
     this.type = type
diff --git a/dlt-connector/src/graphql/model/TransactionResult.ts b/dlt-connector/src/graphql/model/TransactionResult.ts
index dfa28cf1b..bc443ad1f 100644
--- a/dlt-connector/src/graphql/model/TransactionResult.ts
+++ b/dlt-connector/src/graphql/model/TransactionResult.ts
@@ -24,4 +24,4 @@ export class TransactionResult {
 
   @Field(() => Boolean)
   succeed: boolean
-}
\ No newline at end of file
+}
diff --git a/dlt-connector/src/graphql/resolver/CommunityResolver.ts b/dlt-connector/src/graphql/resolver/CommunityResolver.ts
index 2259f604c..9b6d8f3f2 100644
--- a/dlt-connector/src/graphql/resolver/CommunityResolver.ts
+++ b/dlt-connector/src/graphql/resolver/CommunityResolver.ts
@@ -59,7 +59,7 @@ export class CommunityResolver {
     // TODO: write tests to make sure that it doesn't throw
     const addCommunityContext = new AddCommunityContext(communityDraft, topic)
     try {
-      // actually run interaction, create community, accounts for foreign community and transactionRecipe  
+      // actually run interaction, create community, accounts for foreign community and transactionRecipe
       await addCommunityContext.run()
       return new TransactionResult()
     } catch (error) {
diff --git a/dlt-connector/src/graphql/resolver/TransactionsResolver.ts b/dlt-connector/src/graphql/resolver/TransactionsResolver.ts
index 96f6dff65..e2b558668 100755
--- a/dlt-connector/src/graphql/resolver/TransactionsResolver.ts
+++ b/dlt-connector/src/graphql/resolver/TransactionsResolver.ts
@@ -1,90 +1,39 @@
-import { Resolver, Query, Arg, Mutation } from 'type-graphql'
+import { Resolver, Arg, Mutation } from 'type-graphql'
 import { TransactionDraft } from '@input/TransactionDraft'
 import { TransactionResult } from '../model/TransactionResult'
 import { TransactionError } from '../model/TransactionError'
+import { CreateTransactionRecipeContext } from '@/interactions/backendToDb/transaction/CreateTransationRecipe.context'
+import { TransactionRecipe } from '../model/TransactionRecipe'
+import { TransactionRepository } from '@/data/Transaction.repository'
+import { TransactionErrorType } from '../enum/TransactionErrorType'
 
 @Resolver()
 export class TransactionResolver {
-  // Why a dummy function?
-  // to prevent this error by start:
-  //   GeneratingSchemaError: Some errors occurred while generating GraphQL schema:
-  //     Type Query must define one or more fields.
-  // it seems that at least one query must be defined
-  // https://github.com/ardatan/graphql-tools/issues/764
-  @Query(() => String)
-  version(): string {
-    return '0.1'
-  }
-
   @Mutation(() => TransactionResult)
   async sendTransaction(
     @Arg('data')
-    transaction: TransactionDraft,
+    transactionDraft: TransactionDraft,
   ): Promise<TransactionResult> {
+    const createTransactionRecipeContext = new CreateTransactionRecipeContext(transactionDraft)
     try {
-      logger.info('sendTransaction call', transaction)
-      const signingAccount = await findAccountByUserIdentifier(transaction.senderUser)
-      if (!signingAccount) {
-        throw new TransactionError(
-          TransactionErrorType.NOT_FOUND,
-          "couldn't found sender user account in db",
+      await createTransactionRecipeContext.run()
+      const transactionRecipe = createTransactionRecipeContext.getTransactionRecipe()
+      transactionRecipe.save()
+      return new TransactionResult(new TransactionRecipe(transactionRecipe))
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    } catch (error: any) {
+      if (error.code === 'ER_DUP_ENTRY') {
+        const existingRecipe = await TransactionRepository.findBySignature(
+          createTransactionRecipeContext.getTransactionRecipe().signature,
         )
-      }
-      logger.info('signing account', signingAccount)
-
-      const recipientAccount = await findAccountByUserIdentifier(transaction.recipientUser)
-      if (!recipientAccount) {
-        throw new TransactionError(
-          TransactionErrorType.NOT_FOUND,
-          "couldn't found recipient user account in db",
-        )
-      }
-      logger.info('recipient account', recipientAccount)
-
-      const body = createTransactionBody(transaction, signingAccount, recipientAccount)
-      logger.info('body', body)
-      const gradidoTransaction = createGradidoTransaction(body)
-
-      const signingKeyPair = getKeyPair(signingAccount)
-      if (!signingKeyPair) {
-        throw new TransactionError(
-          TransactionErrorType.NOT_FOUND,
-          "couldn't found signing key pair",
-        )
-      }
-      logger.info('key pair for signing', signingKeyPair)
-
-      KeyManager.getInstance().sign(gradidoTransaction, [signingKeyPair])
-      const recipeTransactionController = await TransactionRecipe.create({
-        transaction: gradidoTransaction,
-        senderUser: transaction.senderUser,
-        recipientUser: transaction.recipientUser,
-        signingAccount,
-        recipientAccount,
-        backendTransactionId: transaction.backendTransactionId,
-      })
-      try {
-        await recipeTransactionController.getTransactionRecipeEntity().save()
-        ConditionalSleepManager.getInstance().signal(TRANSMIT_TO_IOTA_SLEEP_CONDITION_KEY)
-        // eslint-disable-next-line @typescript-eslint/no-explicit-any
-      } catch (error: any) {
-        if (error.code === 'ER_DUP_ENTRY' && body.type === CrossGroupType.LOCAL) {
-          const existingRecipe = await findBySignature(
-            gradidoTransaction.sigMap.sigPair[0].signature,
+        if (!existingRecipe) {
+          throw new TransactionError(
+            TransactionErrorType.LOGIC_ERROR,
+            "recipe cannot be added because signature exist but couldn't load this existing receipt",
           )
-          if (!existingRecipe) {
-            throw new TransactionError(
-              TransactionErrorType.LOGIC_ERROR,
-              "recipe cannot be added because signature exist but couldn't load this existing receipt",
-            )
-          }
-          return new TransactionResult(new TransactionRecipeOutput(existingRecipe))
-        } else {
-          throw error
         }
+        return new TransactionResult(new TransactionRecipe(existingRecipe))
       }
-      return new TransactionResult()
-    } catch (error) {
       if (error instanceof TransactionError) {
         return new TransactionResult(error)
       } else {
diff --git a/dlt-connector/src/interactions/backendToDb/community/HomeCommunity.role.ts b/dlt-connector/src/interactions/backendToDb/community/HomeCommunity.role.ts
index 4ae946498..cd52d6de1 100644
--- a/dlt-connector/src/interactions/backendToDb/community/HomeCommunity.role.ts
+++ b/dlt-connector/src/interactions/backendToDb/community/HomeCommunity.role.ts
@@ -1,16 +1,19 @@
 import { CommunityDraft } from '@/graphql/input/CommunityDraft'
 import { Community } from '@entity/Community'
 import { CommunityRole } from './Community.role'
-import { QueryRunner } from 'typeorm'
 import { Transaction } from '@entity/Transaction'
 import { KeyManager } from '@/controller/KeyManager'
 import { AccountFactory } from '@/data/Account.factory'
 import { CreateTransactionRecipeContext } from '../transaction/CreateTransationRecipe.context'
+import { logger } from '@/server/logger'
+import { TransactionError } from '@/graphql/model/TransactionError'
+import { TransactionErrorType } from '@/graphql/enum/TransactionErrorType'
+import { getDataSource } from '@/typeorm/DataSource'
 
 export class HomeCommunityRole extends CommunityRole {
   private transactionRecipe: Transaction
 
-  public create(communityDraft: CommunityDraft, topic: string): void {
+  public async create(communityDraft: CommunityDraft, topic: string): Promise<void> {
     super.create(communityDraft, topic)
     // generate key pair for signing transactions and deriving all keys for community
     const keyPair = KeyManager.generateKeyPair()
@@ -26,22 +29,22 @@ export class HomeCommunityRole extends CommunityRole {
 
     const transactionRecipeContext = new CreateTransactionRecipeContext(communityDraft)
     transactionRecipeContext.setCommunity(this.self)
-    transactionRecipeContext.run()
+    await transactionRecipeContext.run()
     this.transactionRecipe = transactionRecipeContext.getTransactionRecipe()
   }
 
-  public store(): Promise<Community> {
-
-  }
-
-  public async addCommunity(communityDraft: CommunityDraft, topic: string): Promise<Community> {
-    const community = createHomeCommunity(communityDraft, topic)
-
-    createCommunityRootTransactionRecipe(communityDraft, community).storeAsTransaction(
-      async (queryRunner: QueryRunner): Promise<void> => {
-        await queryRunner.manager.save(community)
-      },
-    )
-    return community.save()
+  public async store(): Promise<Community> {
+    try {
+      return await getDataSource().transaction(async (transactionalEntityManager) => {
+        await transactionalEntityManager.save(this.transactionRecipe)
+        return await transactionalEntityManager.save(this.self)
+      })
+    } catch (error) {
+      logger.error('error saving home community into db: %s', error)
+      throw new TransactionError(
+        TransactionErrorType.DB_ERROR,
+        'error saving home community into db',
+      )
+    }
   }
 }
diff --git a/dlt-connector/src/interactions/backendToDb/transaction/CreateTransationRecipe.context.ts b/dlt-connector/src/interactions/backendToDb/transaction/CreateTransationRecipe.context.ts
index 454dd5b41..a5da13dcd 100644
--- a/dlt-connector/src/interactions/backendToDb/transaction/CreateTransationRecipe.context.ts
+++ b/dlt-connector/src/interactions/backendToDb/transaction/CreateTransationRecipe.context.ts
@@ -27,7 +27,7 @@ export class CreateTransactionRecipeContext {
     this.community = community
   }
 
-  public getCommunity() {
+  public getCommunity(): Community | undefined {
     return this.community
   }
 
@@ -35,9 +35,10 @@ export class CreateTransactionRecipeContext {
     return this.transactionRecipeRole.getTransaction()
   }
 
-  public run(): void {
+  public async run(): Promise<void> {
     if (this.draft instanceof TransactionDraft) {
-      this.transactionRecipeRole = new TransactionRecipeRole().create(this.draft)
+      this.transactionRecipeRole = new TransactionRecipeRole()
+      await this.transactionRecipeRole.create(this.draft)
     } else if (this.draft instanceof CommunityDraft) {
       if (!this.community) {
         throw new TransactionError(TransactionErrorType.MISSING_PARAMETER, 'community was not set')
diff --git a/dlt-connector/src/interactions/backendToDb/transaction/TransactionRecipe.role.ts b/dlt-connector/src/interactions/backendToDb/transaction/TransactionRecipe.role.ts
index 4a432f67e..4107a37b1 100644
--- a/dlt-connector/src/interactions/backendToDb/transaction/TransactionRecipe.role.ts
+++ b/dlt-connector/src/interactions/backendToDb/transaction/TransactionRecipe.role.ts
@@ -1,12 +1,12 @@
+import { AccountRepository } from '@/data/Account.repository'
+import { KeyPair } from '@/data/KeyPair'
 import { TransactionBuilder } from '@/data/Transaction.builder'
+import { TransactionBodyBuilder } from '@/data/proto/TransactionBody.builder'
 import { TransactionErrorType } from '@/graphql/enum/TransactionErrorType'
 import { TransactionDraft } from '@/graphql/input/TransactionDraft'
 import { TransactionError } from '@/graphql/model/TransactionError'
-import { TransactionRecipe } from '@/graphql/model/TransactionRecipe'
-import { TransactionResult } from '@/graphql/model/TransactionResult'
-import { logger } from '@/server/logger'
-import { getDataSource } from '@/typeorm/DataSource'
-import { QueryRunner } from 'typeorm'
+import { sign } from '@/utils/cryptoHelper'
+import { Transaction } from '@entity/Transaction'
 
 export class TransactionRecipeRole {
   protected transactionBuilder: TransactionBuilder
@@ -14,40 +14,50 @@ export class TransactionRecipeRole {
     this.transactionBuilder = new TransactionBuilder()
   }
 
-  public create(transactionDraft: TransactionDraft): TransactionRecipeRole {
+  public async create(transactionDraft: TransactionDraft): Promise<TransactionRecipeRole> {
+    const senderUser = transactionDraft.senderUser
+    const recipientUser = transactionDraft.recipientUser
+
+    // loading signing and recipient account
+    // TODO: look for ways to use only one db call for both
+    const signingAccount = await AccountRepository.findAccountByUserIdentifier(senderUser)
+    if (!signingAccount) {
+      throw new TransactionError(
+        TransactionErrorType.NOT_FOUND,
+        "couldn't found sender user account in db",
+      )
+    }
+    const recipientAccount = await AccountRepository.findAccountByUserIdentifier(recipientUser)
+    if (!recipientAccount) {
+      throw new TransactionError(
+        TransactionErrorType.NOT_FOUND,
+        "couldn't found recipient user account in db",
+      )
+    }
+
+    // create proto transaction body
+    const transactionBodyBuilder = new TransactionBodyBuilder()
+      .setSigningAccount(signingAccount)
+      .setRecipientAccount(recipientAccount)
+      .fromTransactionDraft(transactionDraft)
+    // build transaction entity
+
+    this.transactionBuilder
+      .fromTransactionBodyBuilder(transactionBodyBuilder)
+      .setBackendTransactionId(transactionDraft.backendTransactionId)
+    await this.transactionBuilder.setSenderCommunityFromSenderUser(senderUser)
+    if (recipientUser.uuid !== senderUser.uuid) {
+      await this.transactionBuilder.setRecipientCommunityFromRecipientUser(recipientUser)
+    }
+    const transaction = this.transactionBuilder.getTransaction()
+    // sign
+    this.transactionBuilder.setSignature(
+      sign(transaction.bodyBytes, new KeyPair(this.transactionBuilder.getSenderCommunity())),
+    )
     return this
   }
 
   public getTransaction(): Transaction {
     return this.transactionBuilder.getTransaction()
   }
-
-  public async storeAsTransaction(
-    transactionFunction: (queryRunner: QueryRunner) => Promise<void>,
-  ): Promise<TransactionResult> {
-    const queryRunner = getDataSource().createQueryRunner()
-    await queryRunner.connect()
-    await queryRunner.startTransaction()
-
-    let result: TransactionResult
-    try {
-      const transactionRecipe = this.transactionBuilder.build()
-      await transactionFunction(queryRunner)
-      await queryRunner.manager.save(transactionRecipe)
-      await queryRunner.commitTransaction()
-      result = new TransactionResult(new TransactionRecipe(transactionRecipe))
-    } catch (err) {
-      logger.error('error saving new transaction recipe into db: %s', err)
-      result = new TransactionResult(
-        new TransactionError(
-          TransactionErrorType.DB_ERROR,
-          'error saving transaction recipe into db',
-        ),
-      )
-      await queryRunner.rollbackTransaction()
-    } finally {
-      await queryRunner.release()
-    }
-    return result
-  }
 }