Ethereum: correct Eth to JS price conversion

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Ethereum: Correctly Converting ETH Price in JavaScript

As a cryptocurrency enthusiast, managing the price of Ethereum (ETH) can be a challenge. A common problem that arises when converting the price of ETH is correctly converting it between different units and platforms. In this article, we will explore why console errors occur and provide a solution to accurately convert the price of ETH using JavaScript.

The Problem

In your excerpt, you mentioned that you fixed the hexadecimal notation error, which means that the code should now be able to correctly display the ETH symbol (0x). However, when you try to convert this value to decimal, you will see large numbers. This may be because Metamask throws an error due to its limitations in converting large values.

Solution

To accurately convert the ETH price, we need to make sure that the conversion process is handled properly and the code doesn’t get stuck in an infinite loop due to excessive conversions.

Here’s a modified version of your code snippet:

// Get the current ETH price from MetaMask API
async function getEthPrice() {
try {
// Retrieve the ETH price from Metamask using Web3 API
const response = await fetch('
// Parse the JSON response
const data = await response.json();
if (!data || !data.ethPrice) {
throw new Error('Failed to retrieve ETH price from Metamask.');
}
// Convert ETH price to decimal
const priceDecimals = 18; // Set this value according to your needs
return parseFloat(data.ethPrice) / Math.pow(10, priceDecimals);
} catch (error) {
console.error('Error while retrieving or parsing ETH price:', error);
return null;
}
}
// Test the function
getEthPrice().then((price) => {
if (price !== null) {
console.log(The current price of ETH is: $${(price).toFixed(2)} by ${Math.floor(priceDecimals * 10).toString().padStart(1, '0')} );
}
});

Improvements and Suggestions

• Set a specific decimal: To avoid issues with large numbers, it is essential to set the number of decimals using priceDecimals = 18; or your preferred value. This ensures that the converted price is rounded correctly.

• Use async/await for promises: Promises are asynchronous and should be handled accordingly. The code now uses async/await for a more readable and maintainable syntax.

By following these suggestions, you can accurately convert Ethereum prices using JavaScript and avoid console errors related to large numbers or infinite loops.