Trying to convert INR value to equivalent Eth (wei)

Question

I'm trying to write a smart contract that takes INR as user input and converts it to equivalent eth ( wei ). I looked into chainlink datafeeds, but no luck there. Need advice on how to implement this. Thanks.

Answer 1

Firstly , you need to have a source from which you can get the exchange rates there are 2 ways for it :

1. External API
2. Data Feed services

Next , If you have the exchange rate, you can write the conversion function in Solidity.

solidity code : 
    uint256 convertedEthAmount = inrAmount * exchangeRate / 1e18;
     return convertedEthAmount * 1e18; // convert to wei

Lastly , in frontend you have to follow few steps to get these values ,

1. Import the ABI
2. Create web3 instance : const contract = new web3.eth.Contract(ABI, contractAddress);
3. Call the solidity function : contract.methods.convert_Inr_to_Eth(inr_Amount).call()