So how much money do I need to transfer to test opening a channel?
0.002 plus the fees to open a channel.
Then use "
reverse swap" to get some of the funds you don't need back to onchain, but that process comes with a fee of 0.0002+ BTC.
Or launch Electrum with
-testnet argument to use testnet's chain for testing purposes.
So can I run on a multisig wallet too? I need it and two ln wallets that I created for the test. it turns out that all three should be run with this argument, right? All transactions with bitcoins there simply will not be present in the history later when to return to the main working network?