Process Deposits

[malikankit]

Deposit Instruction (for users to deposit SOL into the Lido Program)

• Basic Code
• 1 Test (Success)
• Check Incoming Parameters / Accounts
• Add Tests where this fails

[malikankit]

This is a follow up from discussion with @ruuda

We have LSOL in lieu of deposit = SOL Deposited by user * Total LSOL / Total SOL

1. To make sure our LSOL calculation is accurate above, we need to ensure Total SOL is up to date with the SOL accrued as rewards.

2. As rewards are accrued every epoch, we should update the Total SOL at the start of every epoch.

3. This means : we should have an instruction - UpdateLidoSOLBalance- that is called by a Bot at the start of each epoch

4. We can also add a flag to disallow deposits - until UpdateLidoSOLBalance hasn't been called in this epoch.

Thoughts @enriquefynn ?

[naomijub]

Some checks #41