something don't understand

[af913337456]

When I reading the source code,I don't know what the meaning of this line of code is and why it should be set.

var MarketBaseOrder = map[string]uint8{"BAR": 5, "LRC": 10, "WETH": 20, "DAI": 30}

why is 'BAR' but 'EOS' ? and it was used in

for k := range allTokens { // lrc,omg
		for kk := range supportMarkets { //eth
			// map[string]uint8{"BAR": 5, "LRC": 10, "WETH": 20, "DAI": 30}
			o, ok := MarketBaseOrder[k]
			if ok {
				baseOrder := MarketBaseOrder[kk]
				if o < baseOrder {
					allMarkets = append(allMarkets, k+"-"+kk)
				}
			} else {
				allMarkets = append(allMarkets, k+"-"+kk)
			}
			log.Infof("market util,supported market:%s", k+"-"+kk)
		}
	}

Please give me a guide @mmmmmagina

[af913337456]

@hzbdesigner @kongliangzhong @dong77 @yun163 can u help me for this？