[sui-framework] change stake subsidy schedule (MystenLabs#9251)

## Description 

This PR changes various constants related to stake subsidies advised by
@econmysten .

## Test Plan 

How did you test the new or updated feature?

---
If your changes are not user-facing and not a breaking change, you can
skip the following section. Otherwise, please indicate what changed, and
then add to the Release Notes section as highlighted during the release
process.

### Type of Change (Check all that apply)

- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

crates/sui-config/tests/snapshots/snapshot_tests__populated_genesis_snapshot_matches-3.snap

@@ -286,8 +286,8 @@ validator_report_records:
 stake_subsidy:
   epoch_counter: 0
   balance:
-    value: 975000000000000000
-  current_epoch_amount: 1000000
+    value: 100000000000000000
+  current_epoch_amount: 1000000000000000
 safe_mode: false
 epoch_start_timestamp_ms: 10
 

crates/sui-framework/docs/genesis.md

@@ -28,10 +28,10 @@
 
 <a name="0x2_genesis_INIT_STAKE_SUBSIDY_AMOUNT"></a>
 
-Stake subisidy to be given out in the very first epoch. Placeholder value.
+Stake subisidy to be given out in the very first epoch in Mist (1 million * 10^9).
 
 
-<pre><code><b>const</b> <a href="genesis.md#0x2_genesis_INIT_STAKE_SUBSIDY_AMOUNT">INIT_STAKE_SUBSIDY_AMOUNT</a>: u64 = 1000000;
+<pre><code><b>const</b> <a href="genesis.md#0x2_genesis_INIT_STAKE_SUBSIDY_AMOUNT">INIT_STAKE_SUBSIDY_AMOUNT</a>: u64 = 1000000000000000;
 </code></pre>
 
 
@@ -46,6 +46,15 @@ The initial balance of the Subsidy fund in Mist (1 Billion * 10^9)
 
 
 
+<a name="0x2_genesis_INIT_STAKE_SUBSIDY_FUND_BALANCE_TEST_ONLY"></a>
+
+
+
+<pre><code><b>const</b> <a href="genesis.md#0x2_genesis_INIT_STAKE_SUBSIDY_FUND_BALANCE_TEST_ONLY">INIT_STAKE_SUBSIDY_FUND_BALANCE_TEST_ONLY</a>: u64 = 100000000000000000;
+</code></pre>
+
+
+
 <a name="0x2_genesis_create"></a>
 
 ## Function `create`
@@ -90,7 +99,7 @@ all the information we need in the system.
     ctx: &<b>mut</b> TxContext,
 ) {
     <b>let</b> sui_supply = <a href="sui.md#0x2_sui_new">sui::new</a>(ctx);
-    <b>let</b> subsidy_fund = <a href="balance.md#0x2_balance_split">balance::split</a>(&<b>mut</b> sui_supply, <a href="genesis.md#0x2_genesis_INIT_STAKE_SUBSIDY_FUND_BALANCE">INIT_STAKE_SUBSIDY_FUND_BALANCE</a>);
+    <b>let</b> subsidy_fund = <a href="balance.md#0x2_balance_split">balance::split</a>(&<b>mut</b> sui_supply, <a href="genesis.md#0x2_genesis_INIT_STAKE_SUBSIDY_FUND_BALANCE_TEST_ONLY">INIT_STAKE_SUBSIDY_FUND_BALANCE_TEST_ONLY</a>);
     <b>let</b> storage_fund = <a href="balance.md#0x2_balance_zero">balance::zero</a>();
     <b>let</b> validators = <a href="_empty">vector::empty</a>();
     <b>let</b> count = <a href="_length">vector::length</a>(&validator_pubkeys);
@@ -140,7 +149,8 @@ all the information we need in the system.
             primary_address,
             worker_address,
             // Initialize all validators <b>with</b> uniform stake taken from the subsidy fund.
-            <a href="_some">option::some</a>(<a href="balance.md#0x2_balance_split">balance::split</a>(&<b>mut</b> subsidy_fund, initial_validator_stake_mist)),
+            // TODO: change this back <b>to</b> take from subsidy fund instead.
+            <a href="_some">option::some</a>(<a href="balance.md#0x2_balance_split">balance::split</a>(&<b>mut</b> sui_supply, initial_validator_stake_mist)),
             gas_price,
             commission_rate,
             <b>true</b>, // <a href="validator.md#0x2_validator">validator</a> is active right away

crates/sui-framework/docs/stake_subsidy.md

@@ -87,7 +87,7 @@
 
 
 
-<pre><code><b>const</b> <a href="stake_subsidy.md#0x2_stake_subsidy_STAKE_SUBSIDY_PERIOD_LENGTH">STAKE_SUBSIDY_PERIOD_LENGTH</a>: u64 = 30;
+<pre><code><b>const</b> <a href="stake_subsidy.md#0x2_stake_subsidy_STAKE_SUBSIDY_PERIOD_LENGTH">STAKE_SUBSIDY_PERIOD_LENGTH</a>: u64 = 10;
 </code></pre>
 
 

crates/sui-framework/sources/governance/genesis.move

@@ -13,12 +13,14 @@ module sui::genesis {
     use sui::validator;
     use std::option;
 
-    /// Stake subisidy to be given out in the very first epoch. Placeholder value.
-    const INIT_STAKE_SUBSIDY_AMOUNT: u64 = 1000000;
+    /// Stake subisidy to be given out in the very first epoch in Mist (1 million * 10^9).
+    const INIT_STAKE_SUBSIDY_AMOUNT: u64 = 1_000_000_000_000_000;
 
     /// The initial balance of the Subsidy fund in Mist (1 Billion * 10^9)
     const INIT_STAKE_SUBSIDY_FUND_BALANCE: u64 = 1_000_000_000_000_000_000;
 
+    const INIT_STAKE_SUBSIDY_FUND_BALANCE_TEST_ONLY: u64 = 100_000_000_000_000_000;
+
     /// This function will be explicitly called once at genesis.
     /// It will create a singleton SuiSystemState object, which contains
     /// all the information we need in the system.
@@ -48,7 +50,7 @@ module sui::genesis {
         ctx: &mut TxContext,
     ) {
         let sui_supply = sui::new(ctx);
-        let subsidy_fund = balance::split(&mut sui_supply, INIT_STAKE_SUBSIDY_FUND_BALANCE);
+        let subsidy_fund = balance::split(&mut sui_supply, INIT_STAKE_SUBSIDY_FUND_BALANCE_TEST_ONLY);
         let storage_fund = balance::zero();
         let validators = vector::empty();
         let count = vector::length(&validator_pubkeys);
@@ -98,7 +100,8 @@ module sui::genesis {
                 primary_address,
                 worker_address,
                 // Initialize all validators with uniform stake taken from the subsidy fund.
-                option::some(balance::split(&mut subsidy_fund, initial_validator_stake_mist)),
+                // TODO: change this back to take from subsidy fund instead.
+                option::some(balance::split(&mut sui_supply, initial_validator_stake_mist)),
                 gas_price,
                 commission_rate,
                 true, // validator is active right away

crates/sui-framework/sources/governance/stake_subsidy.move

@@ -10,7 +10,7 @@ module sui::stake_subsidy {
 
     struct StakeSubsidy has store {
         /// This counter may be different from the current epoch number if
-        /// in some epochs we decide to skip the subsidy. 
+        /// in some epochs we decide to skip the subsidy.
         epoch_counter: u64,
         /// Balance of SUI set aside for stake subsidies that will be drawn down over time.
         balance: Balance<SUI>,
@@ -23,7 +23,7 @@ module sui::stake_subsidy {
 
     // Placeholder numbers.
     const STAKE_SUBSIDY_DECREASE_RATE: u128 = 1000; // in basis point
-    const STAKE_SUBSIDY_PERIOD_LENGTH: u64 = 30; // in number of epochs
+    const STAKE_SUBSIDY_PERIOD_LENGTH: u64 = 10; // in number of epochs
 
     public(friend) fun create(balance: Balance<SUI>, initial_stake_subsidy_amount: u64): StakeSubsidy {
         StakeSubsidy {