MultiChain Developer Q&A - Recent questions tagged subscribe

Even 'admin' cannot subscribe/publish to read & write restricted stream

Wed, 11 Sep 2019 11:16:33 +0000

I created a stream with name sun in a chain wheree I am the owner/admin:

$ create stream sun '{"restrict":"write,read"}'

I got created.But when I try to subscribe to this stream it get following error:

This feature is only available in MultiChain Enterprise: Subscribing to read-restricted stream

And when I tried publishing, it gave me this error:

Publishing onchain items is not allowed to this stream

So, is there any way for admin/owner of the stream & chain to subscribe, read and write to this stream without opting for Enterprise edition?

Thanks!

Generate automatic events on create/update of item/stream so that polling is not required

Fri, 06 Sep 2019 07:09:04 +0000

I have multichain configured on server. So, like in Ethereum, we can create event in the smart contract which can keep listening to events for new actions, likewise, can we subscribe to stream events using Multichain's APIs without explicitely keep polling from subscriber's end?

Can you give an example of which param to use to not retrieve off chain items?

Sat, 29 Jun 2019 04:21:35 +0000

what exactly does each one of these parameters mean when using it with subscribe?
streams-items,streams-items-local,streams-keys,streams-keys-local,streams-publishers,streams-publishers-local,streams-retrieve

Why did a subscribe API call take a long time?

Thu, 21 Jun 2018 18:08:54 +0000

{"id":"multichain-client","jsonrpc":"1.0","method":"subscribe","params":["837B4DB1DBB113F511D3F1EBE01C19A7"]}

RPC CMD DURATION: 16.518668655s

All my other RPC calls seem normal. This is giving me responses between 14-20 seconds.

Thanks.

Can we set mining permission (for first and other blocks) according to user permissions?

Wed, 05 Apr 2017 22:26:08 +0000

I was wandering if there is any way I can configure the parameters in such a way to give mining rights for first transaction (asset coining) only to users who have mining permissions. While after first block confirmation, leave mining open to everybody or rather allow mining only to those who have issueing rights?..

I was also wondering if we can specify mining rights according to the asset/permissions combination?

Thank you!

stream data replicated everywhere?

Tue, 21 Mar 2017 20:07:21 +0000

Is stream data replicated across all nodes, or only nodes that subscribe to that data?

thanks,

jas

Subscribe blocks for a long time

Fri, 14 Oct 2016 12:16:46 +0000

Hi,

Subscribing to a stream for a second time blocks for a very long time. Is this by-design?

kind regards

Fuzz

Can we include permission to only allow certain address to subscribe to streams?

Tue, 11 Oct 2016 05:52:33 +0000

Hi,

Is it possible to allow some address to subscribe to streams? My use case is only allowing authorized address to view the stream data.