add shorter format json method to util library
add shorter format json method to util library

chochinlu/ens-bid-dapp,PhyrexTsai/ens-bid-dapp,ens-bid/ens-bid-dapp,PhyrexTsai/ens-bid-dapp,chochinlu/ens-bid-dapp,ens-bid/ens-bid-dapp