[DDW-535] Support frontend only mode

[DominikGuzei]

This PR adds support for frontendOnlyMode which makes it possible to connect to manually started instances of cardano-node for advanced debugging purposes.

How to Test:

1. Within the cardano-sl repository you first have to build a script for a certain network … e.g for testnet: nix-build -A connectScripts.testnet.wallet -o launch_testnet
2. Then launch this cluster + node with ./launch_testnet
3. You should now have a state-wallet-testnet folder inside the cardano-sl repo … copy the full path to the sub folder tls in there.
4. Within the Daedalus repo checkout this branch and run: CARDANO_TLS_PATH=/path/to/tls CARDANO_HOST=localhost CARDANO_PORT=8090 nix-shell

Now you should have a pre-configured nix-shell session where you can yarn dev as usual and Daedalus connects itself to the manually started cardano node.

Note:

Only CARDANO_TLS_PATH is mandatory. CARDANO_HOST defaults to localhost and CARDANO_PORT to 8090 😉

So if you just start the default cardano node (which runs on localhost:8090) you can also start nix-shell with CARDANO_TLS_PATH=/path/to/tls nix-shell

Todos:

• The frontendOnlyMode flag in launcherConfig is always true … it should be false when --arg autoStartBackend true is passed to the nix-shell command. This means that currently only the manual cardano node mode is working (since it's always assuming that it should run in frontend only mode!)
• Update Electron version used by nix-shell (@cleverca22) - fixed in 045fc7a

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Review Checklist:

Basics

• PR is updated to the most recent version of target branch (and there are no conflicts)
• PR has good description that summarizes all changes and shows some screenshots or animated GIFs of important UI changes
• CHANGELOG entry has been added and is linked to the correct PR on GitHub
• Automated tests: All acceptance tests are passing (yarn run test)
• Manual tests (minimum tests should cover newly added feature/fix): App works correctly in development build (yarn run dev)
• Manual tests (minimum tests should cover newly added feature/fix): App works correctly in production build (yarn run package / CI builds)
• There are no flow errors or warnings (yarn run flow:test)
• There are no lint errors or warnings (yarn run lint)
• Text changes are proofread and approved (Jane Wild)
• There are no missing translations (running yarn run manage:translations produces no changes)
• UI changes look good in all themes (Alexander Rukin)
• Storybook works and no stories are broken (yarn run storybook)
• In case of dependency changes yarn.lock file is updated

Code Quality

• Important parts of the code are properly documented and commented
• Code is properly typed with flow
• React components are split-up enough to avoid unnecessary re-rendering
• Any code that only works in Electron is neatly separated from components

Testing

• New feature / change is covered by acceptance tests
• All existing acceptance tests are still up-to-date
• New feature / change is covered by Daedalus Testing scenario
• All existing Daedalus Testing scenarios are still up-to-date

After Review:

• Merge PR
• Delete source branch
• Move ticket to done on the Youtrack board

[DominikGuzei]

@cleverca22 thanks for the support, i fixed the autoStartBackend convertion to frontendOnlyMode with the help of your change.

This feature is now working for me - i can run Daedalus against a manually started cardano-node and also against the "normal", Daedalus-managed cardano-node 🎉

@nikolaglumac @disassembler please test and spread the word to QA testers to give it a try too.

[nikolaglumac]

@DominikGuzei may I ask you to document this "frontend-only" mode in the main README file? 🙏