Wrong Error sent by ethers ("CALL_EXCEPTION" instead of "INSUFFICIENT_FUNDS")

[terry-daviass]

Hello!
I'm encountering an issue where I'm not receiving the expected "INSUFFICIENT_FUNDS" error from ethers.js when attempting to send a transaction without adequate funds. Instead, I'm getting a "CALL_EXCEPTION" error without any revert data.

I'm experiencing an error handling inconsistency: previously, when sending a transaction without sufficient funds, I'd receive the "INSUFFICIENT_FUNDS" error (I don't clearly remember when it has changed). Now, I get a "CALL_EXCEPTION" error with no details. Interestingly, MetaMask correctly identifies and reports the issue, as shown in the screenshot. Moreover, if I reject the transaction in MetaMask, ethers returns the correct "user-rejected" error:

Here is my code:

 const baseAssetAmount = getPurchaseAmountETH();
    if (baseAssetAmount == null) {
        console.error("Amount not specified");
        return;
    }
    const amountIn = ethers.parseEther(baseAssetAmount);
    const amountOutMin = 0; // Test mode val
    const path = [wrappedCoin, tokenAddress];
    const to = signer.getAddress(); // Recipient of the output tokens
    const deadline = Math.floor(Date.now() / 1000) + 60; // 1 minute deadline

    try {
        const transaction = routerContract.swapExactETHForTokens;
        const parameters = [amountOutMin, path, to, deadline, {value: amountIn}]

        const [tx, amounts] = await Promise.all([
            transaction.send(...parameters),
            transaction.staticCall(...parameters),
        ]);
        console.log("Awaiting for transaction to complete...");
        const txReceipt = await tx.wait();
        ...
        *remaining code*
        ...
    } catch (e) {
        displayError("Error when sending a transaction", e);
    }

Also, in case if I attach the right amount (less than I have on my MetaMask), everything works well.