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feat: add simple RPC health check script #806

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feat: add simple RPC health check script #806

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39 changes: 39 additions & 0 deletions scripts/check_node_health.sh
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Original file line number Diff line number Diff line change
@@ -0,0 +1,39 @@
#!/usr/bin/env bash
set -euo pipefail

RPC_URL="${1:-http://localhost:8545}"

if ! command -v curl >/dev/null 2>&1; then
echo "curl is not installed" >&2
exit 1
fi

REQUEST='{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

echo "Checking Base node health at $RPC_URL..."
HTTP_CODE=$(curl -sS -o /tmp/base_node_health_response.json -w "%{http_code}" \
-H "Content-Type: application/json" \
-d "$REQUEST" \
"$RPC_URL" || echo "000")

if [ "$HTTP_CODE" != "200" ]; then
echo "Health check failed, HTTP status: $HTTP_CODE"
exit 1
fi

if ! command -v jq >/dev/null 2>&1; then
echo "Health check succeeded (HTTP 200), but jq is not installed."
echo "Raw response:"
cat /tmp/base_node_health_response.json
exit 0
fi

BLOCK_HEX=$(jq -r '.result // empty' /tmp/base_node_health_response.json 2>/dev/null || echo "")

if [ -z "$BLOCK_HEX" ] || [ "$BLOCK_HEX" = "null" ]; then
echo "Health check failed: empty block number in response"
cat /tmp/base_node_health_response.json
exit 1
fi

echo "Health check OK, latest block: $BLOCK_HEX"