84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
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package lnurl
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import (
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"errors"
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"io/ioutil"
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"net/http"
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"net/url"
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"strings"
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"github.com/tidwall/gjson"
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)
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// HandleLNURL takes a bech32-encoded lnurl and either gets its parameters from the query-
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// string or calls the URL to get the parameters.
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// Returns a different struct for each of the lnurl subprotocols, the .LNURLKind() method of
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// which should be checked next to see how the wallet is going to proceed.
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func HandleLNURL(rawlnurl string) (string, LNURLParams, error) {
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var err error
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var rawurl string
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if strings.HasPrefix(rawlnurl, "https:") {
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rawurl = rawlnurl
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} else {
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lnurl, ok := FindLNURLInText(rawlnurl)
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if !ok {
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return "", nil, errors.New("invalid bech32-encoded lnurl: " + rawlnurl)
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}
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rawurl, err = LNURLDecode(lnurl)
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if err != nil {
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return "", nil, err
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}
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}
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parsed, err := url.Parse(rawurl)
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if err != nil {
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return rawurl, nil, err
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}
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query := parsed.Query()
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switch query.Get("tag") {
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case "login":
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value, err := HandleAuth(rawurl, parsed, query)
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return rawurl, value, err
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case "withdrawRequest":
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if value, ok := HandleFastWithdraw(query); ok {
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return rawurl, value, nil
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}
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}
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resp, err := http.Get(rawurl)
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if err != nil {
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return rawurl, nil, err
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}
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b, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return rawurl, nil, err
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}
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j := gjson.ParseBytes(b)
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if j.Get("status").String() == "ERROR" {
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return rawurl, nil, LNURLErrorResponse{
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URL: parsed,
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Reason: j.Get("reason").String(),
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Status: "ERROR",
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}
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}
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switch j.Get("tag").String() {
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case "withdrawRequest":
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value, err := HandleWithdraw(j)
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return rawurl, value, err
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case "payRequest":
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value, err := HandlePay(j)
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return rawurl, value, err
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case "channelRequest":
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value, err := HandleChannel(j)
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return rawurl, value, err
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default:
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return rawurl, nil, errors.New("unknown response tag " + j.String())
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}
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}
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