swapExactETHForTokens.estimateGas Causes Abrupt Code Termination with High amountOutMin

[paramkr2]

Ethers Version

6.13.1

Search Terms

No response

Describe the Problem

When attempting to estimate gas for a swapExactETHForTokens transaction using ethers.js v6, the code crashes abruptly if the calculated amountOutMin is higher than expected. This behavior is unexpected and makes it difficult to handle errors gracefully in the application.

Code Snippet

async generatePathandEstimate2(tokenAddress, amount) {
  try {
    const path = [this.wethAddress, tokenAddress];
    const amountsOut = await this.router.getAmountsOut(amount, path);
    const amountOutMin = (amountsOut[1] * 99n) / 100n; // 1% slippage
    return { path, amountOutMin };
  } catch (error) {
    console.log('PathNotFound');
  }

  console.log('Trying With intermediate token');
  const intermediates = await this.pathFinder.getTokensForAddress(tokenAddress);
  console.log(intermediates);
  for (let token of intermediates) {
    try {
      const path = [this.wethAddress, token, tokenAddress];
      const amountsOut = await this.router.getAmountsOut(amount, path);
      const amountOutMin = (amountsOut[2] * 101n) / 100n; // 1% slippage
      return { path, amountOutMin };
    } catch (error) {
      console.log('PathNotFound');
    }
  }
  throw 'Path Not Found';
}

async estimateGas(tokenAddress, amount) {
  try {
    amount = ethers.parseEther(amount.toString(), 18);
    this.wethAddress = await this.router.WETH();

    const { path, amountOutMin } = await this.generatePathandEstimate2(tokenAddress, amount);
    console.log(`estimateGas method`, path, amountOutMin);

    const deadline = Math.floor(Date.now() / 1000) + 1200;
    const gasEstimate = await this.router.swapExactETHForTokens.estimateGas(
      amountOutMin,
      path,
      this.wallet.address,
      deadline,
      { value: amount }
    );
    console.log('Estimated Gas:', gasEstimate.toString());
    return true;
  } catch (err) {
    return false;
  }
}

Contract ABI

No response

Errors

Program Stops Bruptly

Environment

node.js (older than v12)

Environment (Other)

Windows 10