From 2b49402c81ff759e1e51c7b4ac706b04eed500ed Mon Sep 17 00:00:00 2001
From: hana <81144685+2501babe@users.noreply.github.com>
Date: Fri, 13 Mar 2026 04:10:03 -0700
Subject: [PATCH] program: update to stake interface v3

---
 Cargo.lock               | 23 +++++++++++++++++++++--
 program/Cargo.toml       |  2 +-
 program/src/processor.rs | 13 +++++++++++--
 3 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 52284032..6ac40ba8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6717,7 +6717,6 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f6f912ae679b683365348dea482dbd9468d22ff258b554fd36e3d3683c2122e3"
 dependencies = [
- "borsh",
  "num-traits",
  "serde",
  "serde_derive",
@@ -6767,6 +6766,26 @@ dependencies = [
  "test-case",
 ]
 
+[[package]]
+name = "solana-stake-interface"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f49eb5c77484214c3484921e2cdda79d185373118b5458c1b2df0f1a04c3bc30"
+dependencies = [
+ "borsh",
+ "num-traits",
+ "serde",
+ "serde_derive",
+ "solana-clock",
+ "solana-cpi",
+ "solana-instruction",
+ "solana-program-error",
+ "solana-pubkey 4.1.0",
+ "solana-system-interface 3.0.0",
+ "solana-sysvar 4.0.0",
+ "solana-sysvar-id",
+]
+
 [[package]]
 name = "solana-stake-program"
 version = "3.0.10"
@@ -6829,7 +6848,7 @@ dependencies = [
  "solana-sdk-ids",
  "solana-signature",
  "solana-signer",
- "solana-stake-interface 2.0.1",
+ "solana-stake-interface 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "solana-svm-log-collector",
  "solana-system-interface 2.0.0",
  "solana-sysvar 3.0.0",
diff --git a/program/Cargo.toml b/program/Cargo.toml
index 55f4244d..0052f799 100644
--- a/program/Cargo.toml
+++ b/program/Cargo.toml
@@ -19,7 +19,7 @@ solana-program-entrypoint = "3.0.0"
 solana-program-error = "3.0.0"
 solana-pubkey = "3.0.0"
 solana-rent = "3.0.0"
-solana-stake-interface = { version = "2", features = ["bincode", "borsh", "sysvar"] }
+solana-stake-interface = { version = "3", features = ["bincode", "borsh", "sysvar"] }
 solana-sysvar = "3.0.0"
 solana-sysvar-id = "3.1.0"
 solana-vote-interface = { version = "4.0.4", features = ["bincode"] }
diff --git a/program/src/processor.rs b/program/src/processor.rs
index a5599b4c..c6dc4eca 100644
--- a/program/src/processor.rs
+++ b/program/src/processor.rs
@@ -147,6 +147,7 @@ fn do_initialize(
             let stake_state = StakeStateV2::Initialized(Meta {
                 authorized,
                 lockup,
+                #[allow(deprecated)]
                 rent_exempt_reserve: PSEUDO_RENT_EXEMPT_RESERVE,
             });
 
@@ -543,8 +544,12 @@ impl Processor {
                 let is_active_or_activating =
                     source_status.effective > 0 || source_status.activating > 0;
 
+                // `rent_exempt_reserve` is now static, but some old accounts have nonstandard values
                 let mut dest_meta = source_meta;
-                dest_meta.rent_exempt_reserve = PSEUDO_RENT_EXEMPT_RESERVE;
+                #[allow(deprecated)]
+                {
+                    dest_meta.rent_exempt_reserve = PSEUDO_RENT_EXEMPT_RESERVE;
+                }
 
                 (is_active_or_activating, Some(dest_meta))
             }
@@ -554,8 +559,12 @@ impl Processor {
                     .check(&signers, StakeAuthorize::Staker)
                     .map_err(to_program_error)?;
 
+                // `rent_exempt_reserve` is now static, but some old accounts have nonstandard values
                 let mut dest_meta = source_meta;
-                dest_meta.rent_exempt_reserve = PSEUDO_RENT_EXEMPT_RESERVE;
+                #[allow(deprecated)]
+                {
+                    dest_meta.rent_exempt_reserve = PSEUDO_RENT_EXEMPT_RESERVE;
+                }
 
                 (false, Some(dest_meta))
             }