Ethereum: How to correctly convert ETH price to JS
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Ethereum: Correct ETH Price Conversion in JavaScript
As a cryptocurrency enthusiast, managing the price of Ethereum (ETH) can be a challenge. One common problem that arises when converting ETH price is that it converts correctly between different units and platforms. In this article, we will examine why console errors occur and provide a solution to accurately convert ETH price using JavaScript.
Problem
In your snippet, you mentioned that you fixed a hexadecimal notation error, which means that the code should now display the ETH symbol (0x) correctly. However, when you try to convert this value to decimal, it displays large numbers. This can happen because Metamask throws an error due to the limitations of converting large values.
Solution
To accurately convert ETH price, we need to ensure that the conversion process is done correctly and that the code does not get stuck in an infinite loop due to too many conversions.
Here is a modified version of the code snippet:
// Get the current ETH price from MetaMask API
async function getEthPrice() {
try {
// Get the ETH price from Metamask using the Web3 API
const response = await fetch('
// Parse the JSON response
const data = await response.json();
if (!data || !data.ethPrice) {
throw new Error('Could not get ETH price from metamask.');
}
// Convert the ETH price to a decimal number
const priceDecimals = 18; // Set this value to your needs
return parseFloat(data.ethPrice) / Math.pow(10, priceDecimals);
} catch (error) {
console.error('Error retrieving or parsing ETH price:', error);
return null;
}
}
// Test the function
getEthPrice().then((price) => {
if (price !== null) {
console.log(Current ETH price is: $${(price).toFixed(2)} for ${Math.floor(priceDecimals * 10).toString().padStart(1, '0')}) ;
}
});
Improvements and Suggestions
- Set a specific number of decimal places
: To avoid problems with large numbers, it is very important to set the number of decimal places using `
priceDecimals = 18;'' or your preferred value. This ensures that the converted price is rounded correctly.
- Use async/await on promises: Promises are asynchronous and should be handled accordingly. The code now uses`async/await” to make the syntax easier to read and maintain.
By following these suggestions, you can accurately convert Ethereum prices using JavaScript and avoid console errors related to large numbers or infinite loops.
