diff --git a/docs/API-Guide.md b/docs/API-Guide.md
index 9ab8340..e826910 100644
--- a/docs/API-Guide.md
+++ b/docs/API-Guide.md
@@ -34,11 +34,11 @@ echo "Did was created: $did"
 ```sh
 ## input variables
 path_to_crt=../certs/DSC/DSC.crt # you should point to the public pem certificate that represents the signing certificate used to sign health related data
-did="did:lac1:1iT5mqjxfSLyV24tHNgPwg5KMixYdP2FUHRCkir8Sr1RBepGA2da6peZgyB48tFUAdPy" # replace with the did previously created
+did="did:lac1:1iT4ksoK9qcxYYe8vGu2fZEDsYHCkJ7FkpxMeSJUrgLRDMmH3g5hKGry4H9bqGpZJPpB" # replace with the did previously created
 
 
 # process
-add_pem_certificate_url="$api_url"/api/v1/did-lac1/attribute/add/jwk-from-x509certificate
+add_pem_certificate_url="$api_url"/api/v1/did/lac1/attribute/add/jwk-from-x509certificate
 relation=asse
 data='{"did":'"\"$did\""', "relation":'"\"$relation\""'}'
 curl -X 'POST' ${add_pem_certificate_url} -H 'accept: application/json' -F x509Cert=@$path_to_crt -F data=$data
diff --git a/package.json b/package.json
index 0ebd036..7f5c647 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lacpass-identity",
-  "version": "0.0.20",
+  "version": "0.0.23",
   "description": "Rest api for laccpass identity manager",
   "main": "dist/src/index.js",
   "types": "dist/src/index.d.ts",
diff --git a/src/constants/errorMessages.ts b/src/constants/errorMessages.ts
index 3324bbd..f27164e 100644
--- a/src/constants/errorMessages.ts
+++ b/src/constants/errorMessages.ts
@@ -37,7 +37,9 @@ export enum ErrorsMessages {
   X509_INVALID_ORGANIZATION_SUBJECT = 'Invalid or organization subject',
   X509_INVALID_COUNTRY = 'Invalid or certificate country',
   X509_INVALID_COMMON_NAME = 'Invalid x509 CN name',
-  ATTRIBUTE_VALUE_ERROR = 'Attribute value is not an address'
+  ATTRIBUTE_VALUE_ERROR = 'Attribute value is not an address',
+  // eslint-disable-next-line max-len
+  LACCHAIN_CONTRACT_TRANSACTION_ERROR = 'There was an error, there may be an issue with the params you are sending'
 }
 
 export const Errors = {
diff --git a/src/index.ts b/src/index.ts
index 6e63288..b421518 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -11,3 +11,5 @@ export * from './dto/did-lac/addAttributeDTO';
 export * from './dto/did-lac/delegateDTO';
 export * from './interfaces/did-lacchain/did-lacchain.interface';
 export * from './interfaces/did-lacchain/did-lacchain-response.interface';
+export * from './services/did-lac/lacchain/lacchain-ethers';
+export * from './interfaces/ethereum/transaction';
diff --git a/src/services/did-lac/did.service.ts b/src/services/did-lac/did.service.ts
index 7bf7b4e..cc17acc 100644
--- a/src/services/did-lac/did.service.ts
+++ b/src/services/did-lac/did.service.ts
@@ -121,7 +121,7 @@ export abstract class DidService implements DidLacService {
     const name = type;
     const value = delegateAddress;
 
-    const methodName = 'setDelegate';
+    const methodName = 'addDelegate';
     const methodSignature = [
       `function ${methodName}(address,bytes32,address,uint256) public`
     ];
diff --git a/src/services/did-lac/lacchain/lacchain-ethers.ts b/src/services/did-lac/lacchain/lacchain-ethers.ts
index fde31e8..9d4389d 100644
--- a/src/services/did-lac/lacchain/lacchain-ethers.ts
+++ b/src/services/did-lac/lacchain/lacchain-ethers.ts
@@ -6,6 +6,8 @@ import {
   IEthereumTransactionResponse,
   ITransaction
 } from 'src/interfaces/ethereum/transaction';
+import { BadRequestError } from 'routing-controllers';
+import { ErrorsMessages } from '../../../constants/errorMessages';
 
 export class LacchainLib {
   log = log4TSProvider.getLogger('lacchainUtils');
@@ -36,6 +38,14 @@ export class LacchainLib {
     const txResponse = await this.provider.sendTransaction(
       signedTx.signedTransaction
     );
+    this.log.info('waiting for transaction response...');
+    try {
+      await txResponse.wait();
+    } catch (err: any) {
+      throw new BadRequestError(
+        ErrorsMessages.LACCHAIN_CONTRACT_TRANSACTION_ERROR
+      );
+    }
     this.log.info('Transaction successfully sent, txHash', txResponse.hash);
     return { txHash: txResponse.hash };
   }
diff --git a/yarn.lock b/yarn.lock
index a557a65..9990a33 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5217,10 +5217,10 @@ koa@^2.8.2:
     type-is "^1.6.16"
     vary "^1.1.2"
 
-lacpass-key-manager@^0.0.16:
-  version "0.0.16"
-  resolved "https://registry.yarnpkg.com/lacpass-key-manager/-/lacpass-key-manager-0.0.16.tgz#0f6f11f541b121a7df77e5b3424d0b033a24088d"
-  integrity sha512-QPbLfanEG3tu0en+pDsJzsHAjrnnqvELVXavsSKBcFgaHsNvWcFsqaU0lWDw/FEYQH0bn9gq5j4KRN+VqaCrTg==
+lacpass-key-manager@^0.0.17:
+  version "0.0.17"
+  resolved "https://registry.yarnpkg.com/lacpass-key-manager/-/lacpass-key-manager-0.0.17.tgz#3e8ddc87e4a2766467c53f6f22d06975c1723030"
+  integrity sha512-D36Lau2UKK0LwDQSrE6xQM4JMiI5/tS+Z6fmFBFUiYg4/hrtPWL6ii50S6IM/lVcm5UcEhwzMxwoI/QHHUs2Pw==
   dependencies:
     "@lacchain/gas-model-provider" "^1.0.1"
     aws-sdk "^2.1116.0"