code: function() {
      return new Promise(function(onResolve, onReject) {
  
        const getBalance = async function(){
  
          const getSTPBalanceResponse = await fundManager.getSTPrimeBalanceOf(utilityChainOwnerAddr);
  
          if(getSTPBalanceResponse.isSuccess() && (new BigNumber(getSTPBalanceResponse.data.balance)).greaterThan(0)){
            logger.info('* ST\' credited to utility chain owner');
            return onResolve(getSTPBalanceResponse);
          } else {
            logger.info('* Waiting for credit of ST\' to utility chain owner');
            setTimeout(getBalance, 60000);
          }
        };
  
        getBalance();
      });
    }
docs: Wait for ST Prime mint
  
  @return {promise}
  @private