add a new api for subAccounts balance info

Author: fenzheng1991

account.go

@@ -118,3 +118,36 @@ type DeleteSubApiKeyRes struct {
 	ApiKey  string `json:"apiKey"`
 	SubName string `json:"subName"`
 }
+
+// SubAccountsBalance Get All Sub-Accounts Balance - Futures
+func (as *ApiService) SubAccountsBalance(currency string) (*ApiResponse, error) {
+	p := map[string]string{
+		"currency": currency,
+	}
+	req := NewRequest(http.MethodGet, "/api/v1/account-overview-all", p)
+	return as.Call(req)
+}
+
+type SubAccountBalanceModel struct {
+	Summary struct {
+		AccountEquityTotal    json.Number `json:"accountEquityTotal"`
+		UnrealisedPNLTotal    json.Number `json:"unrealisedPNLTotal"`
+		MarginBalanceTotal    json.Number `json:"marginBalanceTotal"`
+		PositionMarginTotal   json.Number `json:"positionMarginTotal"`
+		OrderMarginTotal      json.Number `json:"orderMarginTotal"`
+		FrozenFundsTotal      json.Number `json:"frozenFundsTotal"`
+		AvailableBalanceTotal json.Number `json:"availableBalanceTotal"`
+		Currency              string      `json:"currency"`
+	} `json:"summary"`
+	Accounts []struct {
+		AccountName      string      `json:"accountName"`
+		AccountEquity    json.Number `json:"accountEquity"`
+		UnrealisedPNL    json.Number `json:"unrealisedPNL"`
+		MarginBalance    json.Number `json:"marginBalance"`
+		PositionMargin   json.Number `json:"positionMargin"`
+		OrderMargin      json.Number `json:"orderMargin"`
+		FrozenFunds      json.Number `json:"frozenFunds"`
+		AvailableBalance json.Number `json:"availableBalance"`
+		Currency         string      `json:"currency"`
+	} `json:"accounts"`
+}

account_test.go

@@ -140,3 +140,20 @@ func TestApiService_DeleteSubApiKey(t *testing.T) {
 	}
 	t.Log(ToJsonString(w))
 }
+
+func TestApiService_SubAccountsBalance(t *testing.T) {
+	s := NewApiServiceFromEnv()
+	rsp, err := s.SubAccountsBalance("USDT")
+	if err != nil {
+		t.Fatal(err)
+	}
+	w := SubAccountBalanceModel{}
+	if err := rsp.ReadData(&w); err != nil {
+		t.Fatal(err)
+	}
+
+	t.Log(ToJsonString(w.Summary))
+	for _, account := range w.Accounts {
+		t.Log(ToJsonString(account))
+	}
+}