validator.sh: Add --reset-ledger option (#5235)

* Add --recreate-ledger option

* --reset-ledger

multinode-demo/fullnode.sh

@@ -198,6 +198,7 @@ no_restart=0
 airdrops_enabled=1
 generate_snapshots=0
 boot_from_snapshot=1
+reset_ledger=0
 
 positional_args=()
 while [[ -n $1 ]]; do
@@ -268,6 +269,9 @@ while [[ -n $1 ]]; do
     elif [[ $1 = --no-airdrop ]]; then
       airdrops_enabled=0
       shift
+    elif [[ $1 = --reset-ledger ]]; then
+      reset_ledger=1
+      shift
     elif [[ $1 = -h ]]; then
       fullnode_usage "$@"
     else
@@ -415,6 +419,18 @@ kill_fullnode() {
 }
 trap 'kill_fullnode' INT TERM ERR
 
+if ((reset_ledger)); then
+  echo "Resetting ledger..."
+  (
+    set -x
+    rm -rf "$state_dir"
+    rm -rf "$ledger_config_dir"
+  )
+  if [[ -d "$SOLANA_RSYNC_CONFIG_DIR"/ledger/ ]]; then
+    cp -a "$SOLANA_RSYNC_CONFIG_DIR"/ledger/ "$ledger_config_dir"
+  fi
+fi
+
 while true; do
   if [[ $node_type != bootstrap_leader ]] && new_genesis_block; then
     # If the genesis block has changed remove the now stale ledger and