The SDK provides a function that returns a set of fee options which can be passed in when sending a transaction.
txOptions = await peanut.setFeeOptions({
chainId: '137',
provider: undefined //optional arg for ethers provider
})
And returns an interface like this:
interface ISetFeeOptionsResponse {
gasPrice: string
gasLimit: string
maxPriorityFeePerGas: string
maxFeePerGas: string
}