# Scanning Blocks

> Poll for new blocks and inspect transactions using curl

Canonical URL: https://docs.minaprotocol.com/node-operators/rosetta/samples/scan-blocks

To poll for new blocks, query `/network/status` for the current block height, then fetch each block sequentially.

Get the current block height:

```bash
curl -s "$ROSETTA_URL/network/status" \
  -H 'Content-Type: application/json' \
  -d "{\"network_identifier\":$NETWORK}" | jq '.current_block_identifier.index'
```

Fetch a specific block by index:

```bash
BLOCK_INDEX=1000

curl -s "$ROSETTA_URL/block" \
  -H 'Content-Type: application/json' \
  -d "{\"network_identifier\":$NETWORK,\"block_identifier\":{\"index\":$BLOCK_INDEX}}" | jq .
```

A simple polling loop that waits for new blocks:

```bash
HEIGHT=$(curl -s "$ROSETTA_URL/network/status" \
  -H 'Content-Type: application/json' \
  -d "{\"network_identifier\":$NETWORK}" | jq '.current_block_identifier.index')

while true; do
  BLOCK=$(curl -s "$ROSETTA_URL/block" \
    -H 'Content-Type: application/json' \
    -d "{\"network_identifier\":$NETWORK,\"block_identifier\":{\"index\":$HEIGHT}}")

  if echo "$BLOCK" | jq -e '.block' > /dev/null 2>&1; then
    echo "Block $HEIGHT:"
    echo "$BLOCK" | jq '.block.transactions[] | .transaction_identifier.hash'
    HEIGHT=$((HEIGHT + 1))
  else
    sleep 10
  fi
done
```