1103 rpc client logs expected error #1465
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Description
Closes #1103
The low-level RPC-Client method "invoke" logs errors from Multichain regardless of the error-handling on high-level methods that call it. When trying to create a stream that exists on the chain, Multichain throws a -705 error, which is logged by the RPC-Client. This is not desirable for the ensureStreamExists/getOrCreateStream functions, because these functions are meant to return a stream if such stream exists and therefore should not throw an error in such case. That's why the solution is to send an additional network request with "liststreams" command to check if the desired stream exists. In that case the "create stream" command will be bypassed as well as the error it returns.