OpenTelemetry SDK
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    Variable SEMATTRS_RPC_JSONRPC_ERROR_CODEConst

    SEMATTRS_RPC_JSONRPC_ERROR_CODE: "rpc.jsonrpc.error_code" = TMP_RPC_JSONRPC_ERROR_CODE

    error.code property of response if it is an error response.

    Use ATTR_RPC_JSONRPC_ERROR_CODE in [incubating entry-point](https://github.com/open-telemetry/opentelemetry-js/blob/main/semantic-conventions/README.md#unstable-semconv).