added apr response data

apr.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"encoding/json"
+	"math"
+	"net/http"
+)
+
+type Chain struct {
+	ChainID string `json:"chain_id"`
+	Params  Params `json:"params"`
+}
+
+type Params struct {
+	EstimatedApr float64 `json:"estimated_apr"`
+}
+
+type APRResponse struct {
+	Chains []ChainAPR `json:"chains"`
+}
+
+type ChainAPR struct {
+	ChainID string  `json:"chain_id"`
+	APR     float64 `json:"apr"`
+}
+
+func getAPRquery(baseurl string, chainname string) (ChainAPR, error) {
+	url := baseurl + chainname
+	resp, err := http.Get(url)
+	if err != nil {
+		return ChainAPR{}, err
+	}
+
+	defer resp.Body.Close()
+
+	var result map[string]json.RawMessage
+	err = json.NewDecoder(resp.Body).Decode(&result)
+	if err != nil {
+		return ChainAPR{}, err
+	}
+
+	var chain Chain
+	err = json.Unmarshal(result["chain"], &chain)
+	if err != nil {
+		return ChainAPR{}, err
+	}
+
+	if chainname != "quicksilver" {
+		feeadjustedAPR := (chain.Params.EstimatedApr) * (0.965)
+		compoundedAPR := math.Pow(1+feeadjustedAPR/121.66, 121.66) - 1
+		return ChainAPR{ChainID: chain.ChainID, APR: compoundedAPR}, nil
+	}
+	return ChainAPR{ChainID: chain.ChainID, APR: chain.Params.EstimatedApr}, nil
+
+}