Migrate to Tor v3 onion service protocol

[ripcurlx]

Description

This project is about migrating from Tor Hidden Services version 2 to Tor onion services version 3 and the required steps to do so.

Rationale

Why do we want to update?

• we expect significant improvements during startup? - yes
• improves security/privacy? - yes (better crypto, no longer sha1)
• solves our connection issue with seednodes,...? - unknown, maybe
• we expect a positive performance impact on the Bisq network? - ?
• we expect fewer timeouts? - ?
• we have to upgrade at some point - is that so? - no reason that we know of now
• fixes issue: Versions 1.2.7-1.3.4 not working with system Tor, unless a torControlPassword is specified bisq#3987? - ?

Why do we want to update now?

Risks

Criteria for delivery

• All new Bisq clients are v3 by default
• [ ]

Measures of success

Milestones

Proof of concept

• upgrade v2 to v3 in a branch, deploy a test network and test all platforms, mix of v2 clients and v3
• measure performance improvements, if any
• decide whether to move forward

Ship it

• all new clients use v3 hostnames
• all existing seednodes use v2
• one new seednode use v3 hostname
• wait and see how it goes over time
• look to support team to report potential issues
• checkpoint - do we go on with milestone 3? at what scope?

Allow old clients to upgrade

• support renewal feature
• reputation migration?

Tasks

• add support for Tor onion services v3 in our legacy clients
• evaluate performance improvements -> what would be a success for this upgrade?
• update tor binary and use v3 onion services by default for new clients
• enable users to renew onion addresses, warning them that reputation is not transfered
• transfer reputation when migrating from Tor Hidden Services version 2 to Tor onion services version 3

Estimates

[ripcurlx]

Superseded by #23

[cbeams]

Thanks, @ripcurlx. Note that I've just added the was:superseded label. It's important from the Master Projects Board perspective to see a was:* label on each closed project, so it's easy to distinguish which were delivered / dropped / superseded, etc.