Release v2.2.0

vendor/github.com/fiatjaf/go-lnurl/withdraw.go

@@ -0,0 +1,73 @@
+package lnurl
+
+import (
+	"errors"
+	"net/url"
+	"strconv"
+
+	"github.com/tidwall/gjson"
+)
+
+type LNURLWithdrawResponse struct {
+	LNURLResponse
+	Tag                string   `json:"tag"`
+	K1                 string   `json:"k1"`
+	Callback           string   `json:"callback"`
+	CallbackURL        *url.URL `json:"-"`
+	MaxWithdrawable    int64    `json:"maxWithdrawable"`
+	MinWithdrawable    int64    `json:"minWithdrawable"`
+	DefaultDescription string   `json:"defaultDescription"`
+	BalanceCheck       string   `json:"balanceCheck,omitempty"`
+}
+
+func (_ LNURLWithdrawResponse) LNURLKind() string { return "lnurl-withdraw" }
+
+func HandleWithdraw(j gjson.Result) (LNURLParams, error) {
+	callback := j.Get("callback").String()
+	callbackURL, err := url.Parse(callback)
+	if err != nil {
+		return nil, errors.New("callback is not a valid URL")
+	}
+
+	return LNURLWithdrawResponse{
+		Tag:                "withdrawRequest",
+		K1:                 j.Get("k1").String(),
+		Callback:           callback,
+		CallbackURL:        callbackURL,
+		MaxWithdrawable:    j.Get("maxWithdrawable").Int(),
+		MinWithdrawable:    j.Get("minWithdrawable").Int(),
+		DefaultDescription: j.Get("defaultDescription").String(),
+		BalanceCheck:       j.Get("balanceCheck").String(),
+	}, nil
+}
+
+func HandleFastWithdraw(query url.Values) (LNURLParams, bool) {
+	callback := query.Get("callback")
+	if callback == "" {
+		return nil, false
+	}
+	callbackURL, err := url.Parse(callback)
+	if err != nil {
+		return nil, false
+	}
+	maxWithdrawable, err := strconv.ParseInt(query.Get("maxWithdrawable"), 10, 64)
+	if err != nil {
+		return nil, false
+	}
+	minWithdrawable, err := strconv.ParseInt(query.Get("minWithdrawable"), 10, 64)
+	if err != nil {
+		return nil, false
+	}
+	balanceCheck := query.Get("balanceCheck")
+
+	return LNURLWithdrawResponse{
+		Tag:                "withdrawRequest",
+		K1:                 query.Get("k1"),
+		Callback:           callback,
+		CallbackURL:        callbackURL,
+		MaxWithdrawable:    maxWithdrawable,
+		MinWithdrawable:    minWithdrawable,
+		DefaultDescription: query.Get("defaultDescription"),
+		BalanceCheck:       balanceCheck,
+	}, true
+}