plumb staking_account and voting_keypair from multinode-demo to Vote (#3199)

* plumb staking_account and voting_keypair from bash to Vote

multinode-demo/common.sh

@@ -110,6 +110,68 @@ tune_system() {
   fi
 }
 
+airdrop() {
+  declare keypair_file=$1
+  declare host=$2
+  declare amount=$3
+
+  declare address
+  address=$($solana_wallet --keypair "$keypair_file" address)
+
+  # TODO: Until https://github.com/solana-labs/solana/issues/2355 is resolved
+  # a fullnode needs N lamports as its vote account gets re-created on every
+  # node restart, costing it lamports
+  declare retries=5
+
+  while ! $solana_wallet --keypair "$keypair_file" --host "$host" airdrop "$amount"; do
+
+    # TODO: Consider moving this retry logic into `solana-wallet airdrop`
+    #   itself, currently it does not retry on "Connection refused" errors.
+    ((retries--))
+    if [[ $retries -le 0 ]]; then
+        echo "Airdrop to $address failed."
+        return 1
+    fi
+    echo "Airdrop to $address failed. Remaining retries: $retries"
+    sleep 1
+  done
+
+  return 0
+}
+
+setup_fullnode_staking() {
+  declare drone_address=$1
+  declare fullnode_id_path=$2
+  declare staker_id_path=$3
+
+  declare fullnode_id
+  fullnode_id=$($solana_wallet --keypair "$fullnode_id_path" address)
+
+  declare staker_id
+  staker_id=$($solana_wallet --keypair "$staker_id_path" address)
+
+  # A fullnode requires 43 lamports to function:
+  # - one lamport to keep the node identity public key valid. TODO: really??
+  # - 42 more for the staker account we fund
+  airdrop "$fullnode_id_path" "$drone_address" 43 || return $?
+
+  # A little wrong, fund the staking account from the
+  #  to the node.  Maybe next time consider doing this the opposite
+  #  way or use an ephemeral account
+  $solana_wallet --keypair "$fullnode_id_path" \
+               create-staking-account "$staker_id" 42 || return $?
+
+  # as the staker, set the node as the delegate and the staker as
+  #  the vote-signer
+  $solana_wallet --keypair "$staker_id_path" \
+                 configure-staking-account \
+                 --delegate-account "$fullnode_id" \
+                 --authorize-voter "$staker_id"  || return $?
+
+  return 0
+}
+
+
 # The directory on the bootstrap leader that is rsynced by other full nodes as
 # they boot (TODO: Eventually this should go away)
 SOLANA_RSYNC_CONFIG_DIR=$PWD/config