Feature request: Allow for setting custom eth price 🙏

[DenhamPreen]

Feature request

It would be a nice configuration to be able to set the price of eth when doing gas price calculations.

This would allow users to view the gas costs for a given eth price.

A side benefit would allow approx usage when using on EVM layer2's. Ie. Could set the price of 'eth' to the price of Matic when testing on Polygon.

[cgewecke]

If a new option called cryptoCurrency were added that let you specify the crypto side of the crypto/fiat pair would that work for your use case?

The coinmarketcap API is flexible about this and the gas reporter could make it configurable in the code here

    const coinmarketcap =
      `https://pro-api.coinmarketcap.com/v1/cryptocurrency/quotes/` +
      `latest?symbol=ETH&CMC_PRO_API_KEY=${config.coinmarketcap}&convert=`;


    const currencyKey = config.currency.toUpperCase();
    const currencyPath = `${coinmarketcap}${currencyKey}`;

The execution costs on Polygon are so low that the gas reporter (w/ 2 decimals of precision for fiat) might not show data for a lot of smaller calls...

If the math below is correct, the worst case cost on Polygon right now (for a whole block at fastest) is $0.25

> (7.5 gwei / 1e9) * ($1.70) * 20_000_000 gas
0.25499999999999995

A 300k tx at standard is $0.00051

> (1 gwei / 1e9) * ($1.70) * 300_000 gas
0.00051

Resources

• Polygon gas prices: curl https://gasstation-mainnet.matic.network

[cgewecke]

@DenhamPreen

Out of curiosity, would adding more decimal places of precision for fiat pricing be useful to you?

If so, could you describe how you're using this data?

[DenhamPreen]

@cgewecke! Thank you for such a detailed response.

Yes, this would work for our use case.

Additional decimal places would be useful in this scenario.

Our use case is a purely nice to have, in our https://docs.float.capital we are displaying the approx gas prices to users for different contract calls.

Less critical with polygon due to the low gas prices making the need or cost to user mostly negligible.

[DenhamPreen]

The math on max possible usd cost of a tx on polygon really emphasizes this 😆

[pasevin]

Any updates on this, it would be very useful.

[stevyhacker]

This would be very useful, I'd like to try to implement it and open a PR for this if this feature is not already in development?

[tolstenko]

I am in the same boat. Any updates? @stevyhacker did you make it?

[cgewecke]

This is supported in v1.0.5. You can now pick any token to denominate the cost in and configure an endpoint to fetch network specific gas prices for.