well-goknown/nostr/nostr.go

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package nostr
import (
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"encoding/json"
"errors"
"fmt"
"net/http"
"strings"
"git.minhas.io/asara/well-goknown/lnd"
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"git.minhas.io/asara/well-goknown/redis"
"github.com/davecgh/go-spew/spew"
"github.com/nbd-wtf/go-nostr/nip19"
)
type nostrWellKnown struct {
Names map[string]string `json:"names"`
Relays map[string][]string `json:"relays,omitempty"`
}
type NostrRequest struct {
Name string `json:"name"`
Key string `json:"key"`
Hostname string
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Relays []string `json:"relays,omitempty"`
}
func RequestNostrAddr(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case "GET":
http.ServeFile(w, r, "nostr/form.html")
case "POST":
r.ParseForm()
relays := make(map[string][]string)
npub := r.FormValue("Key")
// convert npub to hex
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hexKey, err := convertNpubToHex(npub)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
names := map[string]string{r.FormValue("Name"): hexKey}
user := nostrWellKnown{}
if r.FormValue("Relays") != "" {
relays = map[string][]string{
hexKey: strings.Split(r.FormValue("Relays"), ","),
}
user = nostrWellKnown{Names: names, Relays: relays}
} else {
user = nostrWellKnown{Names: names}
}
jsonUser, _ := json.Marshal(user)
paymentReq, exp, err := lnd.Request(jsonUser)
if err != nil {
w.WriteHeader(http.StatusServiceUnavailable)
return
}
spew.Dump(paymentReq)
spew.Dump(exp)
}
}
func GetNostrAddr(w http.ResponseWriter, r *http.Request) {
// get query string for username
r.ParseForm()
// connect to redis
redis, err := redis.New("localhost:6379", "", redis.NostrDb)
if err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
requestedName := r.FormValue("name")
// search for user@domain
search := fmt.Sprintf("%s@%s", requestedName, getHostname(r.Host))
addr, err := redis.Client.Get(search).Result()
if err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, addr)
}
func AddNostrAddr(n NostrRequest) {
// transform request to well known struct
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relays := make(map[string][]string)
user := nostrWellKnown{}
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hexKey, err := convertNpubToHex(n.Key)
if err != nil {
fmt.Printf("Not an npub")
}
names := map[string]string{n.Name: hexKey}
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if n.Relays != nil {
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relays = map[string][]string{hexKey: n.Relays}
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user = nostrWellKnown{Names: names, Relays: relays}
} else {
user = nostrWellKnown{Names: names}
}
jsonUser, _ := json.Marshal(user)
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r, err := redis.New("localhost:6379", "", redis.NostrDb)
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if err != nil {
fmt.Println("FAILED")
}
nameKey := fmt.Sprintf("%s@%s", n.Name, n.Hostname)
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err = r.Client.Set(nameKey, jsonUser, redis.NostrDb).Err()
if err != nil {
fmt.Println("FAILED")
}
}
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func getHostname(hostname string) string {
// remove port for local testing
if strings.Contains(hostname, ":") {
hostname = strings.Split(hostname, ":")[0]
}
return hostname
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}
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func convertNpubToHex(npub string) (string, error) {
if !strings.HasPrefix(npub, "npub1") {
return "", errors.New("Not an npub key")
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}
_, hex, err := nip19.Decode(npub)
if err != nil {
spew.Dump(hex)
}
return hex.(string), nil
}