Skip to main content

Connect to an Infura endpoint

This tutorial walks you through connecting Quorum Key Manager (QKM) to an Infura endpoint.

This tutorial demonstrates connecting to Infura to allow a QKM-managed account to interact with a smart contract on the Rinkeby network. It uses a QKM instance on top of a Kubernetes cluster with an AWS KMS as key storage.



  1. In Infura, create a new Ethereum project.

  2. Go to the project settings, and get the endpoint associated with your target network (in this example, Rinkeby). This endpoint is your node URL.<YOUR_PROJECT_ID>
  3. Start QKM with the Helmfile chart specifying a manifest file with the following content:

    # Infura node manifest
    - kind: Node
    name: infura-node

    # Ethereum store manifest backed by an AWS keystore
    - kind: Vault
    type: aws
    name: aws-europe
    secret_key: <YOUR_KMS_ACCOUNT_SECRET>
    - kind: Store
    type: key
    name: aws-keys
    vault: aws-europe
    - kind: Store
    type: ethereum
    name: eth-accounts
    key_store: aws-keys
  4. You can connect QKM to Infura using one of the following methods:

    • Port forwarding. Run the following commands:

      export POD_NAME=$(kubectl get pods --namespace $QKM-NAMESPACE -l "," -o jsonpath="{.items[0]}")

      kubectl --namespace $QKM-NAMESPACE port-forward $POD_NAME 8080:8080
    • Ingress. Set up the appropriate Ingress values in the helm chart before deployment in order to have Ingress activated and configured according to your solution.

  5. Create a new Ethereum account using the createAccount method, filling in your own values. Change the localhost target according to your Ingress configuration and required URL:

    curl --location --request POST 'https://localhost:8080/stores/eth-accounts/ethereum' \
    --header 'Authorization: Basic YWRtaW4tdXNlcg==' \
    --header 'Content-Type: application/json' \
    --data-raw '{
    "keyId": "my-infura-key",
    "tags": {
    "owner": "mySelf"

    The response yields an Ethereum account address.

  6. Send JSON-RPC-based transactions to the Infura node created in step 1 using the Ethereum account created in step 5. Change <MY_ETH_ACCOUNT_ADDRESS> to the response address from the previous step, and the localhost target according to your Ingress configuration and required URL:

    curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_sendTransaction","params":[{"from": <MY_ETH_ACCOUNT_ADDRESS>,"to": "0x015C7C7A7D65bbdb117C573007219107BD7486f9","value": "0x1000000"}], "id":1}' http://localhost:8080/nodes/rinkeby-infura
  7. Test that everything worked:

    • Check that Infura has recorded your action with <YOUR_PROJECT_ID>.
    • Check that the transaction has been mined. You can view it on Etherscan.

Next steps

Once connected to an Infura endpoint, you can send Ethereum meta-transactions.