can we restrict the input of a node from a specific node , or is there any way we can make 2 nodes dependent to each other

Are you designing a new node (to be published to the flows library like node-red-contrib-my-new-node)? OR Are you just using node-red? - if so, please move this to the #general category The answer is different depending on the above ↑

if this can be achieved in node red only then fine otherwise can design a new node also

Node-RED doesn't not provide any way to restrict what can be wired to what. You could add some custom logic to your node that warns the user when an 'invalid' configuration is created. But there's not way to stop it being created.

You might want to look at this thread as well. [image] Is there an editor event on wiring up two nodes? Developing Nodes Thanks. Linting sounds great during design time. I'll take a look. @TotallyInformation As for the purpose, our custom node lib includes node clusters that are supposed to work within their own circles, so some kind of barricades are needed. I'd like to improve the affordance with explicit barricades so that people learn the node combination and the correct in/out port mapping with intuition as much as possible. Although there are the on-hover port tooltips and the help doc pane on the sidebar,…

how can we do that ? and do you know what is node credentials used for? how is it used.

There are lots of ways it could be done. If you can explain more fully what you want to do, we can advise the best way of achieving it. As for node credentials... Rather than overload this one topic with lots of different questions, please start a new topic. And be sure to provide enough detail on what you are trying to do.

i want to make a node red flow like if i will deliver the node red flow to my client, they could not use all the nodes for their purpose, that is they cant do customization on their own on my node red flow

That seems to be a very different scenario to what you asked at the start. The adminAuth setting allows you to create a user who can view the flows, but not deploy any changes. Search for "securing Node-RED" in the docs. But if they are running Node-RED for themselves, there would be nothing stopping them from disabling any security and modifying the flows themselves.

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Node restriction from multiple nodes

Developing Nodes

TotallyInformation 23 August 2022 07:43 5

You might want to look at this thread as well.

Topic		Replies	Views
Restricting connections between custom nodes Developing Nodes	7	634	14 September 2020
[Feature Request] Disallow incompatible node connections Feature Requests	9	706	22 July 2020
Add security to the flow or to a node General function-node	1	276	28 July 2022
Can we secure a single node in node red Developing Nodes security	3	326	23 August 2022
Revisit: enable wire checks [Feature Request] Disallow incompatible node connections Feature Requests	0	429	27 March 2021

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Node restriction from multiple nodes

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