infura

infura.js

const fetch = require('node-fetch');

async function run() {
  let current = 3963556;

  while (true) {
    const currentFrom = current;
    const currentTo = current + 5;

    console.time('fetch');
    const req = await fetch('https://sepolia.infura.io/v3/UPDATE_ME', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({
        jsonrpc: '2.0',
        id: 1,
        method: 'eth_getLogs',
        params: [
          {
            fromBlock: `0x${currentFrom.toString(16)}`,
            toBlock: `0x${currentTo.toString(16)}`
          }
        ]
      })
    });

    await req.json();
    console.timeEnd('fetch');

    current = currentTo + 1;
  }
}

run();

infura.sh

API_KEY=$1
START_BLOCK=3962845
STEP=5

to_hex() {
    printf "0x%x\n" $1
}

current=$START_BLOCK
while true
do
    from=$(to_hex $current)
    to=$(to_hex $(($current + $STEP)))

    echo "from: $current, to: $((current + $STEP))"

    curl https://sepolia.infura.io/v3/$API_KEY \
        -H "Content-Type: application/json" \
        -d "{ \"id\": 61, \"jsonrpc\": \"2.0\", \"method\": \"eth_getLogs\", \"params\": [{ \"fromBlock\": \"$from\", \"toBlock\": \"$to\" }]}" \
        --output  /dev/null \
        -s -w 'Total: %{time_total}s\n'

    current=$(($current + $STEP + 1))
done