Using the dfuse API, can I use a single EoswsClient-Instance to stream responds for multiple "getActionTraces"-requests?

Question

example code below:

client = new EoswsClient(createEoswsSocket(() => new ws(`wss://${config.dfuse.endpoint}/v1/stream?token=${config.dfuse.token}`, { origin: config.dfuse.origin })));
    await client.connect();
    client.getActionTraces({ accounts: "eoscontract1" }).onMessage(onMessage);
    client.getActionTraces({ accounts: "eoscontract2" }).onMessage(onMessage);

I'm getting the following Error-Message:

Does this mean that if I want to stream 2 different actions for two different accounts, I would have to instantiate two EoswsClient-instances and to establish two connections?

Here is the context that I set for the stream:

const undelegatebw = {
  accounts: accounts.join("|"),
  receiver: receivers.join("|"),
  //   action_names: "voteproducer,delegatebw,undelegatebw"
  action_names: "undelegatebw"
};
const voteproducer = {
  accounts: accounts.join("|"),
  receiver: receivers.join("|"),
  //   action_names: "voteproducer,delegatebw,undelegatebw"
  action_names: "voteproducer"
};

await dfuseWs.getActionTraces(undelegatebw, options, undelegatebwHandle);
await dfuseWs.getActionTraces(voteproducer, options, voteproducerHandle);

Answer 1

You have to use two different req_id's if you want to receive specific actions of two contracts.

await dfuseWs.getActionTraces({ accounts: "eoscontract1", action_names: "undelegatebw" }, { req_id: "A" }).onMessage(...);
await dfuseWs.getActionTraces({ accounts: "eoscontract2", action_names: "voteproducer" }, { req_id: "B" }).onMessage(...);

If you want to receive action-traces for every action of both contracts you don't even need to send two requests.

await dfuseWs.getActionTraces({ account: "eoscontract1|eoscontract2"}).onMessage(...);