From b3187fc05e220bc3d6b43593cc94cf4ab23f29a7 Mon Sep 17 00:00:00 2001
From: Kirill Konevets <kkonevets@gmail.com>
Date: Wed, 7 Sep 2022 15:27:31 +0300
Subject: [PATCH] cope with Solana raising stake minimum delegation to 1.0 sol

https://github.com/solana-labs/solana/issues/24357
need more tests
---
 cli/maintainer/src/maintenance.rs | 21 ++++++++++++++++-----
 program/tests/mod.rs              |  1 -
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/cli/maintainer/src/maintenance.rs b/cli/maintainer/src/maintenance.rs
index 523c00b81..992092151 100644
--- a/cli/maintainer/src/maintenance.rs
+++ b/cli/maintainer/src/maintenance.rs
@@ -21,6 +21,7 @@ use solana_program::{
     program_pack::Pack,
     pubkey::Pubkey,
     rent::Rent,
+    stake::state::StakeState,
     stake_history::StakeHistory,
 };
 use solana_sdk::{
@@ -674,7 +675,17 @@ impl SolidoState {
         validator: &PubkeyAndEntry<Validator>,
         stake_account: &(Pubkey, StakeAccount),
         amount: Lamports,
-    ) -> (Pubkey, Instruction) {
+    ) -> Option<(Pubkey, Instruction)> {
+        let stake_rent_exempt_amount = StakeState::get_rent_exempt_reserve(&self.rent);
+        let minimum_stake_amount =
+            (Lamports(1_000_000_000) + Lamports(stake_rent_exempt_amount)).ok()?;
+        if amount < minimum_stake_amount {
+            // Due to Solana aiming to raise stake minimum delegation to 1SOL we should
+            // wait till stake amount be large enough for stake account to exist.
+            // https://github.com/solana-labs/solana/issues/24357
+            return None;
+        }
+
         let (validator_unstake_account, _) = validator.find_stake_account_address(
             &self.solido_program_id,
             &self.solido_address,
@@ -682,7 +693,7 @@ impl SolidoState {
             StakeType::Unstake,
         );
         let (stake_account_address, _) = stake_account;
-        (
+        Some((
             validator_unstake_account,
             lido::instruction::unstake(
                 &self.solido_program_id,
@@ -696,7 +707,7 @@ impl SolidoState {
                 },
                 amount,
             ),
-        )
+        ))
     }
 
     /// If there is a validator being deactivated, try to unstake its funds.
@@ -728,7 +739,7 @@ impl SolidoState {
                 validator,
                 &stake_accounts[0],
                 stake_account_balance.balance.total(),
-            );
+            )?;
             let task = MaintenanceOutput::UnstakeFromInactiveValidator(Unstake {
                 validator_vote_account: validator.pubkey,
                 from_stake_account: stake_account_address,
@@ -1132,7 +1143,7 @@ impl SolidoState {
         }
 
         let (unstake_account, instruction) =
-            self.get_unstake_instruction(validator, stake_account, amount);
+            self.get_unstake_instruction(validator, stake_account, amount)?;
         let task = MaintenanceOutput::UnstakeFromActiveValidator(Unstake {
             validator_vote_account: validator.pubkey,
             from_stake_account: stake_account.0,
diff --git a/program/tests/mod.rs b/program/tests/mod.rs
index ca1d50b19..1e20c20f4 100644
--- a/program/tests/mod.rs
+++ b/program/tests/mod.rs
@@ -12,5 +12,4 @@
 // By putting everything in a single module, we sidestep this problem.
 pub mod tests;
 
-#[macro_use]
 extern crate testlib;