No primary access chain found

[ghamkhari]

I am running the Example in this page.

The only parts I have modified:

1- Instead of scratch.ns I use building.city 2- In line state_uri := service.FullURI() + "Berkeley/!meta/state" I change Berkeley to /Berkeley

Running the code results in:

1511259537853502741 [Info] Connected to BOSSWAVE router version 2.7.6 'Klystron' Could not publish: [401] No primary access chain found, cannot elaborate exit status 1

The code is shown below:

package main

import ( bw2 "gopkg.in/immesys/bw2bind.v5" "os" "time" )

func main() { client := bw2.ConnectOrExit("") client.OverrideAutoChainTo(true) client.SetEntityFileOrExit(os.Getenv("BW2_DEFAULT_ENTITY")) baseuri := "building.city/mydrivers" service := client.RegisterService(baseuri, "s.weatherunderground") service.SetMetadata("type", "Web Service") service.SetMetadata("url", "https://www.wunderground.com/weather/api/") po := bw2.CreateMetadataPayloadObject(&bw2.MetadataTuple{ Value: "California", Timestamp: time.Now().UnixNano(), }) state_uri := service.FullURI() + "/Berkeley/!meta/state" client.PublishOrExit(&bw2.PublishParams{ PayloadObjects: []bw2.PayloadObject{po}, URI: state_uri, Persist: true, })
}

[gtfierro]

"No primary access chain found" means that you do not have permission to work with that URI. Who created "building.city"? You need to grant a DOT to the entity you are using (what you've pointed to with BW2_DEFAULT_ENTITY) before you can interact with that URI.

You can check the existence of that DOT using the bw2 buildchain command:

bw2 bc -t <your entity file or VK here> -u 'building.city/mydrivers/s.weatherunderground/Berkeley/!meta/state'

[ghamkhari]

The variable BW2_DEFAULT_ENTITY points to mahdi.net, but building.city is created by ns.net. Issue was resolved after ns.net gave permissions to mahdi.net:

bw2 mkdot --from ns.net --to mahdi.net --uri "building.city/mydrivers/*" --ttl 5 --permissions "PC*"

[gtfierro]

@ghamkhari for specific questions like these, its better to just send me an email

[ghamkhari]

@gtfierro I will ask next questions in Emails.