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package coinpayments |
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import ( |
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"context" |
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"crypto/hmac" |
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"crypto/sha512" |
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"fmt" |
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"io" |
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"io/ioutil" |
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"net/http" |
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"net/url" |
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"strconv" |
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"strings" |
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"github.com/davecgh/go-spew/spew" |
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) |
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type service struct { |
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client *Client |
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} |
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const ( |
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// HeaderNameHMAC is used for authentication |
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HeaderNameHMAC = "HMAC" |
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) |
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// Client is the coinpayments API client. |
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// Do not instantiate this client with Client{}. Use the New method instead. |
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type Client struct { |
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httpClient *http.Client |
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common service |
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baseURL string |
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apiKey string |
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apiSecret string |
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version string |
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ipnSecret string |
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Payment *paymentService |
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} |
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// New creates and returns a new Client from a slice of Option. |
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func New(options ...Option) *Client { |
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config := defaultClientConfig() |
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for _, option := range options { |
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option.apply(config) |
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} |
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client := &Client{ |
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apiKey: config.apiKey, |
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version: config.version, |
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apiSecret: config.apiSecret, |
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httpClient: config.httpClient, |
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baseURL: config.baseURL, |
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ipnSecret: config.ipnSecret, |
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} |
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client.common.client = client |
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client.Payment = (*paymentService)(&client.common) |
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return client |
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} |
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// newRequest creates an API request. A relative URL can be provided in uri, |
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// in which case it is resolved relative to the BaseURL of the Client. |
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// URI's should always be specified without a preceding slash. |
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func (client *Client) newRequest(ctx context.Context, method, cmd string, body url.Values) (*http.Request, error) { |
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body.Add("cmd", cmd) |
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body.Add("key", client.apiKey) |
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body.Add("format", "json") |
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body.Add("version", client.version) |
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req, err := http.NewRequestWithContext(ctx, method, client.baseURL, strings.NewReader(body.Encode())) |
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if err != nil { |
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return nil, err |
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} |
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// generate hmac hash of data and private key |
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hash, err := client.computeHMAC(body.Encode(), client.apiSecret) |
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if err != nil { |
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return nil, err |
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} |
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spew.Dump(hash) |
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req.Header.Add(HeaderNameHMAC, hash) |
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req.Header.Add("Content-Type", "application/x-www-form-urlencoded") |
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req.Header.Add("Content-Length", strconv.Itoa(len(body.Encode()))) |
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return req, nil |
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} |
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// do carries out an HTTP request and returns a Response |
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func (client *Client) do(req *http.Request) (*Response, error) { |
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if req == nil { |
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return nil, fmt.Errorf("%T cannot be nil", req) |
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} |
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httpResponse, err := client.httpClient.Do(req) |
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if err != nil { |
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return nil, err |
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} |
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defer func() { _ = httpResponse.Body.Close() }() |
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resp, err := client.newResponse(httpResponse) |
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if err != nil { |
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return resp, err |
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} |
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_, err = io.Copy(ioutil.Discard, httpResponse.Body) |
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if err != nil { |
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return resp, err |
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} |
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return resp, nil |
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} |
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// newResponse converts an *http.Response to *Response |
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func (client *Client) newResponse(httpResponse *http.Response) (*Response, error) { |
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if httpResponse == nil { |
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return nil, fmt.Errorf("%T cannot be nil", httpResponse) |
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} |
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resp := new(Response) |
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resp.HTTPResponse = httpResponse |
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buf, err := ioutil.ReadAll(resp.HTTPResponse.Body) |
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if err != nil { |
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return nil, err |
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} |
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resp.Body = &buf |
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return resp, resp.Error() |
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} |
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// computeHMAC returns the hmac hash of the data |
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func (client *Client) computeHMAC(data string, secret string) (string, error) { |
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hash := hmac.New(sha512.New, []byte(secret)) |
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if _, err := hash.Write([]byte(data)); err != nil { |
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return "", err |
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} |
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return fmt.Sprintf("%x", hash.Sum(nil)), nil |
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} |
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// IpnHMAC returns the hmac hash of the data |
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func (client *Client) IpnHMAC(data string) (string, error) { |
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return client.computeHMAC(data, client.ipnSecret) |
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} |
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NdoleStudio /
coinpayments-go
