services/stake_and_mint/approve_openst_value_contract.js
function () {
    return simpleToken.balanceOf(stakerAddress)
      .then(function (result) {
        const stBalance = result.data['balance'];

        return new BigNumber(stBalance);
      })
  }
function () {
    return simpleToken.balanceOf(stakerAddress)
      .then(function (result) {
        const stBalance = result.data['balance'];

        return new BigNumber(stBalance);
      })
  }
function ( ) { return simpleToken . balanceOf ( stakerAddress ) . then ( function ( result ) { const stBalance = result . data [ 'balance' ] ; return new BigNumber ( stBalance ) ; } ) }
Get ST balance of staker

@return {promise<result>}
@private
@ignore
Get ST balance of staker