let returnType: {
assetContractAddress: Address;
bidBufferBps: bigint;
buyoutBidAmount: bigint;
creatorAddress: Address;
currencyContractAddress: Address;
endTimeInSeconds: bigint;
id: bigint;
minimumBidAmount: bigint;
quantity: bigint;
startTimeInSeconds: bigint;
status: ListingStatus;
timeBufferInSeconds: bigint;
tokenId: bigint;
type: "english-auction";
};