catchup: per-protocol dispatch for bitcoin, cosmos, and ripple

Extend catchup.sh with protocol-aware branches (bitcoin height-gain,
cosmos CometBFT timestamp via timestamp.sh, ripple validated-ledger
seq) and explicit degradation for closed RPC / unsupported protocols.
Reuse sync-status/check-health idioms for protocol resolution and parsing.

Co-authored-by: Cursor <cursoragent@cursor.com>

timestamp.sh

@@ -16,7 +16,15 @@ else
     PROTO="https"
 fi
 
-pathlist=$(cat $BASEPATH/$1.yml | grep -oP "stripprefix\.prefixes.*?/\K[^\"]+")
+compose_yml="$BASEPATH/$1.yml"
+pathlist=$(cat "$compose_yml" | grep -oP "stripprefix\.prefixes.*?/\K[^\"]+")
+
+# Resolve protocol from x-upstreams chain label (reuse sync-status / catchup idiom).
+chain_slug=$(grep -oP '^\s*chain:\s*\K\S+' "$compose_yml" 2>/dev/null | head -1)
+protocol=""
+if [ -n "$chain_slug" ]; then
+    protocol=$($BASEPATH/reference-rpc-endpoint.sh --protocol "$chain_slug" 2>/dev/null) || protocol=""
+fi
 
 for path in $pathlist; do
     include=true
@@ -30,6 +38,40 @@ for path in $pathlist; do
 	RPC_URL="$PROTO://$DOMAIN/$path"
 	response_file=$(mktemp)
 
+	path_protocol="$protocol"
+	if [ -z "$path_protocol" ]; then
+	    if echo "$path" | grep -qi "starknet"; then
+		path_protocol="starknet"
+	    elif echo "$path" | grep -qi "aztec"; then
+		path_protocol="aztec"
+	    elif echo "$path" | grep -qiE "cosmos|babylon|haqq|gaiad|tac"; then
+		path_protocol="cosmos"
+	    else
+		path_protocol="eth"
+	    fi
+	fi
+
+	if [ "$path_protocol" = "cosmos" ]; then
+	    http_status_code=$(curl -L --ipv4 -m 1 -s -X POST -w "%{http_code}" -o "$response_file" \
+		-H "Content-Type: application/json" --data '{"jsonrpc":"2.0","id":1,"method":"status"}' "$RPC_URL")
+	    if [ $? -eq 0 ] && [[ $http_status_code -eq 200 ]]; then
+		response=$(cat "$response_file")
+		latest_block_time=$(echo "$response" | jq -r '.result.sync_info.latest_block_time // .sync_info.latest_block_time' 2>/dev/null)
+		rm -f "$response_file"
+		if [ -z "$latest_block_time" ] || [ "$latest_block_time" = "null" ]; then
+		    exit 1
+		fi
+		latest_block_timestamp_decimal=$(date -d "$latest_block_time" +%s 2>/dev/null)
+		if [ -z "$latest_block_timestamp_decimal" ]; then
+		    exit 1
+		fi
+		echo "$latest_block_timestamp_decimal"
+		exit 0
+	    fi
+	    rm -f "$response_file"
+	    exit 1
+	fi
+
 	# Detect Starknet vs Ethereum vs Aztec based on path
 	if echo "$path" | grep -qi "starknet"; then
 	    rpc_method='{"jsonrpc":"2.0","method":"starknet_getBlockWithTxHashes","params":["latest"],"id":1}'