jsutil: correct the division

cmd/jsutils/faucet_request.js

@@ -0,0 +1,49 @@
+import { ethers } from "ethers";
+import program from "commander";
+
+// Usage:
+//   node faucet_request.js --rpc localhost:8545 --startNum 39539137
+//   node faucet_request.js --rpc localhost:8545 --startNum 39539137 --endNum 40345994
+
+//   node faucet_request.js --rpc https://data-seed-prebsc-1-s1.bnbchain.org:8545 --startNum 39539137 --endNum 40345994
+program.option("--rpc <Rpc>", "Rpc Server URL");
+program.option("--startNum <Num>", "start block", 0);
+program.option("--endNum <Num>", "end block", 0);
+program.parse(process.argv);
+
+const provider = new ethers.JsonRpcProvider(program.rpc);
+const main = async () => {
+    var startBlock = parseInt(program.startNum)
+    var endBlock = parseInt(program.endNum)
+    if (isNaN(endBlock) || isNaN(startBlock) || startBlock == 0) {
+        console.error("invalid input, --startNum", program.startNum, "--end", program.endNum)
+        return
+    }
+    // if --endNum is not specified, set it to the latest block number.
+    if (endBlock == 0) {
+        endBlock = await provider.getBlockNumber();
+    }
+    if (startBlock > endBlock) {
+        console.error("invalid input, startBlock:",startBlock, " endBlock:", endBlock);
+        return
+    }
+
+    let startBalance = await provider.getBalance("0xaa25Aa7a19f9c426E07dee59b12f944f4d9f1DD3", startBlock)
+    let endBalance = await provider.getBalance("0xaa25Aa7a19f9c426E07dee59b12f944f4d9f1DD3", endBlock)
+    const faucetAmount = BigInt(0.3 * 10**18); // Convert 0.3 ether to wei as a BigInt
+    const numFaucetRequest = (startBalance - endBalance) / faucetAmount;
+
+    // Convert BigInt to ether
+    const startBalanceEth = Number(startBalance) / 10**18;
+    const endBalanceEth = Number(endBalance) / 10**18;
+
+    console.log(`Start Balance: ${startBalanceEth} ETH`);
+    console.log(`End Balance: ${endBalanceEth} ETH`);
+
+    console.log("successful faucet request: ",numFaucetRequest);
+};
+main().then(() => process.exit(0))
+    .catch((error) => {
+        console.error(error);
+        process.exit(1);
+    });