interface DeriveContractFeesimport { type DeriveContractFees } from "https://dotland.deno.dev/x/polkadot@0.2.35/api-derive/types.ts"; PropertiescallBaseFee: BNcontractFee: BNcreationFee: BNrentByteFee: BNrentDepositOffset: BNsurchargeReward: BNtombstoneDeposit: BNtransactionBaseFee: BNtransactionByteFee: BNtransferFee: BN