// Accept received trade offer
// It is best to confirm that offer was actually accepted
// by calling GetOffer after Accept and checking offer state
func (c *Client) Accept(offerId uint64) error {
baseurl := fmt.Sprintf("https://steamcommunity.com/tradeoffer/%d/", offerId)
req := netutil.NewPostForm(baseurl+"accept", netutil.ToUrlValues(map[string]string{
"sessionid": c.sessionId,
"serverid": "1",
"tradeofferid": strconv.FormatUint(offerId, 10),
}))
req.Header.Add("Referer", baseurl)
resp, err := c.client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
t := new(struct {
StrError string `json:"strError"`
})
if err = json.NewDecoder(resp.Body).Decode(t); err != nil {
return err
}
if t.StrError != "" {
return newSteamErrorf("accept error: %v\n", t.StrError)
}
if resp.StatusCode != 200 {
return fmt.Errorf("accept error: status code %d", resp.StatusCode)
}
return nil
}
func (c *Client) action(method string, version uint, id TradeOfferId) error {
resp, err := c.client.Do(netutil.NewPostForm(fmt.Sprintf(apiUrl, method, version), netutil.ToUrlValues(map[string]string{
"key": string(c.key),
"tradeofferid": strconv.FormatUint(uint64(id), 10),
})))
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return errors.New(method + " error: status code not 200")
}
return nil
}
func (c *Client) Accept(id TradeOfferId) error {
baseurl := fmt.Sprintf("https://steamcommunity.com/tradeoffer/%d/", id)
req := netutil.NewPostForm(baseurl+"accept", netutil.ToUrlValues(map[string]string{
"sessionid": c.sessionId,
"serverid": "1",
"tradeofferid": strconv.FormatUint(uint64(id), 10),
}))
req.Header.Add("Referer", baseurl)
resp, err := c.client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return fmt.Errorf("accept error: status code %d", resp.StatusCode)
}
return nil
}
// Ajax POSTs to an API endpoint that should return a status
func (t *Trade) postWithStatus(url string, data map[string]string) (*Status, error) {
status := new(Status)
req := netutil.NewPostForm(url, netutil.ToUrlValues(data))
// Tales of Madness and Pain, Episode 1: If you forget this, Steam will return an error
// saying "missing required parameter", even though they are all there. IT WAS JUST THE HEADER, ARGH!
req.Header.Add("Referer", t.baseUrl)
resp, err := t.client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
err = json.NewDecoder(resp.Body).Decode(status)
if err != nil {
return nil, err
}
return status, nil
}
// Sends a new trade offer to the given Steam user. You can optionally specify an access token if you've got one.
// In addition, `counteredOfferId` can be non-nil, indicating the trade offer this is a counter for.
// On success returns trade offer id
func (c *Client) Create(other steamid.SteamId, accessToken *string, myItems, theirItems []TradeItem, counteredOfferId *uint64, message string) (uint64, error) {
// Create new trade offer status
to := map[string]interface{}{
"newversion": true,
"version": 3,
"me": map[string]interface{}{
"assets": myItems,
"currency": make([]struct{}, 0),
"ready": false,
},
"them": map[string]interface{}{
"assets": theirItems,
"currency": make([]struct{}, 0),
"ready": false,
},
}
jto, err := json.Marshal(to)
if err != nil {
panic(err)
}
// Create url parameters for request
data := map[string]string{
"sessionid": c.sessionId,
"serverid": "1",
"partner": other.ToString(),
"tradeoffermessage": message,
"json_tradeoffer": string(jto),
}
var referer string
if counteredOfferId != nil {
referer = fmt.Sprintf("https://steamcommunity.com/tradeoffer/%d/", *counteredOfferId)
data["tradeofferid_countered"] = strconv.FormatUint(*counteredOfferId, 10)
} else {
// Add token for non-friend offers
if accessToken != nil {
params := map[string]string{
"trade_offer_access_token": *accessToken,
}
paramsJson, err := json.Marshal(params)
if err != nil {
panic(err)
}
data["trade_offer_create_params"] = string(paramsJson)
referer = "https://steamcommunity.com/tradeoffer/new/?partner=" + strconv.FormatUint(uint64(other.GetAccountId()), 10) + "&token=" + *accessToken
} else {
referer = "https://steamcommunity.com/tradeoffer/new/?partner=" + strconv.FormatUint(uint64(other.GetAccountId()), 10)
}
}
// Create request
req := netutil.NewPostForm("https://steamcommunity.com/tradeoffer/new/send", netutil.ToUrlValues(data))
req.Header.Add("Referer", referer)
// Send request
resp, err := c.client.Do(req)
if err != nil {
return 0, err
}
defer resp.Body.Close()
t := new(struct {
StrError string `json:"strError"`
TradeOfferId uint64 `json:"tradeofferid,string"`
})
if err = json.NewDecoder(resp.Body).Decode(t); err != nil {
return 0, err
}
// strError code descriptions:
// 15 invalide trade access token
// 16 timeout
// 20 wrong contextid
// 25 can't send more offers until some is accepted/cancelled...
// 26 object is not in our inventory
// error code names are in internal/steamlang/enums.go EResult_name
if t.StrError != "" {
return 0, newSteamErrorf("create error: %v\n", t.StrError)
}
if resp.StatusCode != 200 {
return 0, fmt.Errorf("create error: status code %d", resp.StatusCode)
}
if t.TradeOfferId == 0 {
return 0, newSteamErrorf("create error: steam returned 0 for trade offer id")
}
return t.TradeOfferId, nil
}
// Sends a new trade offer to the given Steam user. You can optionally specify an access token if you've got one.
// In addition, `countered` can be non-nil, indicating the trade offer this is a counter for.
func (c *Client) Create(other steamid.SteamId, accessToken *string, myItems, theirItems []TradeItem, countered *TradeOfferId, message string) (*TradeCreateResult, error) {
to := map[string]interface{}{
"newversion": true,
"version": "3",
"me": map[string]interface{}{
"assets": myItems,
"currency": make([]struct{}, 0),
"ready": false,
},
"them": map[string]interface{}{
"assets": theirItems,
"currency": make([]struct{}, 0),
"ready": false,
},
}
jto, err := json.Marshal(to)
if err != nil {
panic(err)
}
params := make(map[string]string)
if accessToken != nil {
params["trade_offer_access_token"] = *accessToken
}
paramsJson, err := json.Marshal(params)
if err != nil {
panic(err)
}
data := map[string]string{
"sessionid": c.sessionId,
"serverid": "1",
"partner": fmt.Sprintf("%d", other),
"tradeoffermessage": message,
"json_tradeoffer": string(jto),
"captcha": "",
"trade_offer_create_params": string(paramsJson),
}
var referer string
if countered != nil {
referer = fmt.Sprintf("https://steamcommunity.com/tradeoffer/%d/", *countered)
data["tradeofferid_countered"] = fmt.Sprintf("%d", *countered)
} else {
referer = fmt.Sprintf("https://steamcommunity.com/tradeoffer/new?partner=%d", other)
}
req := netutil.NewPostForm("https://steamcommunity.com/tradeoffer/new/send", netutil.ToUrlValues(data))
req.Header.Add("Referer", referer)
resp, err := c.client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
// If we failed, error out
if resp.StatusCode != 200 {
return nil, errors.New("create error: status code not 200")
}
// Load the JSON result into TradeCreateResult
result := new(TradeCreateResult)
decoder := json.NewDecoder(resp.Body)
decoder.Decode(result)
return result, nil
}