interface DeriveContractFeesimport { type DeriveContractFees } from "https://deno.land/x/polkadot@0.2.11/api-derive/types.ts"; PropertiescallBaseFee: BNcontractFee: BNcreationFee: BNrentByteFee: BNrentDepositOffset: BNsurchargeReward: BNtombstoneDeposit: BNtransactionBaseFee: BNtransactionByteFee: BNtransferFee: BN