docs: async function (toApproveAmount) {
  
      const oThis = this
      ;
  
      const approveRsp = await simpleToken.approve(
        stakerAddress,
        stakerPassphrase,
        openSTValueContractAddress,
        toApproveAmount,
        oThis.runInAsync
      );
  
      return Promise.resolve(approveRsp);
  
    }