From d3b458dd9b957b4fa529c3d7c28b592eae25a289 Mon Sep 17 00:00:00 2001
From: Michael Vines <mvines@gmail.com>
Date: Wed, 4 Mar 2020 01:04:44 -0700
Subject: [PATCH] Keep GenesisConfig binary compatible with v0.23 (#8617)

automerge
---
 sdk/src/genesis_config.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sdk/src/genesis_config.rs b/sdk/src/genesis_config.rs
index b90e3e60d..09e373767 100644
--- a/sdk/src/genesis_config.rs
+++ b/sdk/src/genesis_config.rs
@@ -48,6 +48,9 @@ pub struct GenesisConfig {
     pub slots_per_segment: u64,
     /// network speed configuration
     pub poh_config: PohConfig,
+    /// this field exists only to ensure that the binary layout of GenesisConfig remains compatible
+    /// with the Solana v0.23 release line
+    pub __backwards_compat_with_v0_23: u64,
     /// transaction fee config
     pub fee_rate_governor: FeeRateGovernor,
     /// rent config
@@ -89,6 +92,7 @@ impl Default for GenesisConfig {
             slots_per_segment: DEFAULT_SLOTS_PER_SEGMENT,
             poh_config: PohConfig::default(),
             inflation: Inflation::default(),
+            __backwards_compat_with_v0_23: 0,
             fee_rate_governor: FeeRateGovernor::default(),
             rent: Rent::default(),
             epoch_schedule: EpochSchedule::default(),