reduce replicode, introduce passive staking support (#4207)

runtime/src/genesis_utils.rs

@@ -0,0 +1,60 @@
+use solana_sdk::account::Account;
+use solana_sdk::genesis_block::GenesisBlock;
+use solana_sdk::pubkey::Pubkey;
+use solana_sdk::signature::{Keypair, KeypairUtil};
+use solana_sdk::system_program;
+use solana_stake_api::stake_state;
+use solana_vote_api::vote_state;
+
+// The default stake placed with the bootstrap leader
+pub const BOOTSTRAP_LEADER_LAMPORTS: u64 = 42;
+
+pub fn create_genesis_block_with_leader(
+    mint_lamports: u64,
+    bootstrap_leader_id: &Pubkey,
+    bootstrap_leader_stake_lamports: u64,
+) -> (GenesisBlock, Keypair, Keypair) {
+    let mint_keypair = Keypair::new();
+    let voting_keypair = Keypair::new();
+    let staking_keypair = Keypair::new();
+
+    // TODO: de-duplicate the stake once passive staking
+    //  is fully implemented
+    let (vote_account, vote_state) = vote_state::create_bootstrap_leader_account(
+        &voting_keypair.pubkey(),
+        &bootstrap_leader_id,
+        0,
+        bootstrap_leader_stake_lamports,
+    );
+
+    let genesis_block = GenesisBlock::new(
+        &bootstrap_leader_id,
+        &[
+            // the mint
+            (
+                mint_keypair.pubkey(),
+                Account::new(mint_lamports, 0, &system_program::id()),
+            ),
+            // node needs an account to issue votes from, this will require
+            //  airdrops at some point to cover fees...
+            (
+                *bootstrap_leader_id,
+                Account::new(1, 0, &system_program::id()),
+            ),
+            // where votes go to
+            (voting_keypair.pubkey(), vote_account),
+            // passive bootstrap leader stake, duplicates above temporarily
+            (
+                staking_keypair.pubkey(),
+                stake_state::create_delegate_stake_account(
+                    &voting_keypair.pubkey(),
+                    &vote_state,
+                    bootstrap_leader_stake_lamports,
+                ),
+            ),
+        ],
+        &[],
+    );
+
+    (genesis_block, mint_keypair, voting_keypair)
+}