Lnd: noencryptwallet does not display seed

[sputn1ck]

Background

when creating a lnd environment with noencryptwallet set, the wallet gets created without displaying a seed.

Your environment

• lnd v0.5-beta-rc1
• windows 10 64-bit
• bitcoind as backend

Steps to reproduce

start a new lnd with --noencryptwallet

Expected behaviour

the wallet should wait for lncli create

Actual behaviour

the wallet creates a wallet.db without showing a seed

[cfromknecht]

That is expected behavior, remove the --noencryptwallet flag if you require a seed.

[jonasnick]

It's not exactly obvious to users that this is expected behavior. Especially first-time users like me who read https://github.com/lightningnetwork/lnd/blob/master/docs/INSTALL.md#disabling-wallet-encryption and dismiss the this argument must only be used for testing purposes as being overly careful. My expectation was that --noencryptwallet just does what it says without affecting backupability. I only realized much later that I've never seen and therefore never backed up the seed. Maybe it would make sense to stress that part in the documentation to reduce a footgun opportunity.

[Roasbeef]

@jonasnick agreed that we can modify the documentation (even just remove the documentation for that option) to make it less of a foot gun. A related issue to this is: #899, which is to allow the user to input an "empty" passphrase rather than force them to use a non-empty one.

[cfromknecht]

@jonasnick 100% agree that the naming and docs could be improved. I recall bringing this up in the past that the name does not suit the behavior, though the naming stuck and it was not revisited. I've made a PR to help address the confusion as we flesh out a full plan for deprecation.

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