Cardano Explorer - No addresses found and port 8100

English Community Technical Support
1

I’ve been trying to get the Cardano Explorer working with Ubuntu 16.04, but I’m having issues.

I managed to get it so that you can go to (server IP):3100 and you will get the same interface you see here: https://cardanoexplorer.com/

However, it will say “last slots” and “transactions feed” but there will be nothing listed. It will not find any addresses when you search, including ones you know exist.

If I try a curl request like this one:

curl -v “http://localhost:3100/api/addresses/summary/DdzFFzCqrhsfkegDcdUJAGBRoUP2LVakkby6ntdckcURzBsKmNJ7HmQ6LBwLZxTRVBvhZzuFuX9KUpraDcqhJavm35yeXgS2keJPHfKB”

I get this error message in the output of the window that’s running explorer:

[HPM] Error occurred while trying to proxy request /api/addresses/summary/DdzFFzCqrhsfkegD
cdUJAGBRoUP2LVakkby6ntdckcURzBsKmNJ7HmQ6LBwLZxTRVBvhZzuFuX9KUpraDcqhJavm35yeXgS2keJPHfKB from localhost:3100 to http://localhost:8100 (ECONNREFUSED) (Errors | Node.js v21.2.0 Documentation)

I don’t have anything running on port 8100, so my guess is that it’s redirecting the request to a port that’s not in use and then it fails. I’m not sure how to fix this or how it’s supposed to work. Any ideas?

2

Is it compatible with Ubuntu now or did you have to modify your setup somehow?

3

Cardano SL I built from source with these instructions: https://icaruspool.com/ubuntu/

Explorer I haven’t gotten working, so I guess I’m not sure if it’s fully compatible yet.

4

I figured this out if anyone else ends up having a similar issue. The cardano-explorer process uses port 8100 and it’s separate from the normal SL process.

I needed to get the cardano-explorer command working and re-download a second copy of the blockchain. I’m not sure if there’s a way to point it to the same blockchain, but that’s not the default behavior at least.

To get the backend working properly, use step 4 “Explorer Node with Mainnet” from: https://github.com/input-output-hk/cardano-sl/blob/develop/docs/how-to/connect-to-cluster.md

I will probably suggest a documentation change as the instructions just list “Connect to cluster”. Maybe this is intuitive for people with greater familiarity with the Cardano backend architecture.