feat: set up project

internal/services/btc/get_balance.go

@@ -0,0 +1,52 @@
+package btc
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+func NewGetBalanceParams() []interface{} {
+	return []interface{}{}
+}
+
+type GetBalanceResponse struct {
+	Result float64 `json:"result"`
+	RPCResponse
+}
+
+func NewGetBalanceResponse(bts []byte) (*GetBalanceResponse, error) {
+	resp := new(GetBalanceResponse)
+	err := json.Unmarshal(bts, resp)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+func (b *BitcoinService) GetBalance() (float64, error) {
+	req := b.NewRPCRequest().WithMethod(GET_BALANCE)
+	if req == nil {
+		return 0.0, fmt.Errorf("NewRPCRequest %s is nil", GET_BALANCE)
+	}
+
+	resp, err := req.Call(NewGetBalanceParams()...)
+	if err != nil {
+		return 0.0, fmt.Errorf("req.Call: %s", err)
+	}
+
+	strinResp := string(resp)
+	if strinResp == "" {
+		return 0.0, fmt.Errorf("strinResp: %s", err)
+	}
+
+	trx, err := NewGetBalanceResponse(resp)
+	if err != nil {
+		return 0.0, fmt.Errorf("NewGetBalanceResponse: %s", err)
+	}
+	if trx.Error != nil {
+		return 0.0, fmt.Errorf("raw.Error: %+v", trx.Error)
+	}
+
+	return trx.Result, nil
+}