feat: add delegation

[kyranjamie]

Download the latest build

Delegation flow

delegate-stacking-flow.mp4

Notes regarding Stacking changes, #605

PR also introduces better fee handling behaviours than were previously in place for Stacking. These changes ensure we **never** adjust the tx amount to handle the fee. A behaviour reminiscent of when _Stack everything_ was your only option.

We validate input below if you stack within a fee's worth of your entire balance.

And Send Max will go just a little bit under your entire balance.

Disable direct stacking option when balance too low [screenshot]

• Add field to form
• Choose stacking option page
• Add validation to delegator STX address input
• Set a minimum delegated stacking amount
• Add sign delegated stacking tx signing flow
• Homepage changes linking to new page
• Data layer/API reqs/Request delegated stacking information from contract
• Add revocation tx signing flow
• Homepage card for when already delegating
• Test with Ledger blocked by Support mainnet or testnet addresses on any derivation path Zondax/ledger-stacks#52 Tested on mainnet
• Fix delegating to your own address, closes User can enter their own stack address as the delegation address #601
• Don't allow delegation while pending call, closes The wallet allows back to back delegation while the first contract call is pending #602
• UI disables buttons during pending actions, closes Failed to call stacking contract error occurs EDGE CASE #603
• Bug: Pending contract calls don't show up, closes Delegate transaction does not display in wallet instantly takes several minutes #598
• Bug: A delegatee that has revoked their delegation during a delegator's stacking cycle, results in the UI incorrectly displays as if the address is stacking directly itself.
  • Added a tooltip to explain
• Refactor tx signing flow, duplicate code currently