Function getWithdrawStakeInstruction

Withdraw the token from the pool at the current ratio. Succeeds if the stake account has enough SOL to cover the desired amount of pool tokens, and if the withdrawal keeps the total staked amount above the minimum of rent-exempt amount plus max( crate::MINIMUM_ACTIVE_STAKE, solana_program::stake::tools::get_minimum_delegation() ). When allowing withdrawals, the order of priority goes:

• preferred withdraw validator stake account (if set)
• validator stake accounts
• transient stake accounts
• reserve stake account OR totally remove validator stake accounts A user can freely withdraw from a validator stake account, and if they are all at the minimum, then they can withdraw from transient stake accounts, and if they are all at minimum, then they can withdraw from the reserve or remove any validator from the pool.

0. [w] Stake pool
1. [w] Validator stake list storage account
2. [] Stake pool withdraw authority
3. [w] Validator or reserve stake account to split
4. [w] Uninitialized stake account to receive withdrawal
5. [] User account to set as a new withdraw authority
6. [s] User transfer authority, for pool token account
7. [w] User account with pool tokens to burn from
8. [w] Account to receive pool fee tokens
9. [w] Pool token mint account
10. [] Sysvar clock account (required)
11. [] Pool token program id
12. [] Stake program id, User data: amount of pool tokens to withdraw