After I ran just create-polkadot-pre-migration-snapshot I noticed that the initial syncing wasn't starting, so I had a look at the sync-node-para.log file and I found this:
2025-07-19 13:50:48.001 INFO tokio-runtime-worker reconnecting-websocket-client: [Parachain] Trying to connect to next external relaychain node. attempt=4 index=0 url="wss://polkadot-rpc.dwellir.com:443/"
2025-07-19 13:50:48.003 ERROR tokio-runtime-worker reconnecting-websocket-client: [Parachain] Retrying to connect to any external relaychain node failed.
2025-07-19 13:50:48.003 ERROR tokio-runtime-worker reconnecting-websocket-client: [Parachain] No valid RPC url found. Stopping RPC worker.
2025-07-19 13:50:48.003 ERROR tokio-runtime-worker sc_service::task_manager: [Parachain] Essential task `relay-chain-rpc-worker` failed. Shutting down service.
Error:
0: Application: Unable to communicate with RPC worker: RPC worker channel closed. This can hint and connectivity issues with the supplied RPC endpoints. Message: oneshot canceled
1: Unable to communicate with RPC worker: RPC worker channel closed. This can hint and connectivity issues with the supplied RPC endpoints. Message: oneshot canceled
Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.
Naturally, I tried to find a config file where I could replace the problematic URI. However, it seems that endpoint (wss://polkadot-rpc.dwellir.com:443) must be hardcoded somewhere, b/c I couldn't find any config file where that URI could be changed.
After I ran
just create-polkadot-pre-migration-snapshotI noticed that the initial syncing wasn't starting, so I had a look at thesync-node-para.logfile and I found this:Naturally, I tried to find a config file where I could replace the problematic URI. However, it seems that endpoint (
wss://polkadot-rpc.dwellir.com:443) must be hardcoded somewhere, b/c I couldn't find any config file where that URI could be changed.