Hi @kopax
I am sorry you’re facing issues, we are working to keep the docs updated, the migration has been a complex process and involving several stakeholders.
The steps described above are correct for the migration. If you wanna join v2 without migrating from v1, this is the right post: https://forum.polygon.technology/t/joining-heimdall-v2/21073.
You’re actually on the right track but the error you’re getting
error during handshake: error on replay: invalid chain-id on InitChain; expected: heimdallv2-137, got: test-chain-OSvtwq
suggests there’s some kind of issue with the configs.
The link I’ve shared is only the configs-related section, which should help you unblock and run heimdall-v2.
For snapshots, polygon doesn’t maintain official ones, it’s up to the community (e.g. https://services.stakecraft.com/docs/snapshots/polygon-snapshot)