2023-11-19 02:43:22 +00:00
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package main
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import (
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"encoding/json"
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"log"
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"net/http"
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"strconv"
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"time"
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"github.com/nbd-wtf/go-nostr"
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"github.com/nbd-wtf/go-nostr/nip13"
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)
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// PowRequest struct for the POST request
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type PowRequest struct {
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2023-11-21 10:41:56 +00:00
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ReqEvent *nostr.Event `json:"req_event"`
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2023-11-19 02:43:22 +00:00
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Difficulty string `json:"difficulty"`
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}
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// handlePOW is the handler function for the "/powgen" endpoint
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func handlePOW(w http.ResponseWriter, r *http.Request) {
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if r.Method != "POST" {
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http.Error(w, "Invalid request method", http.StatusMethodNotAllowed)
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return
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}
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var powReq PowRequest
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err := json.NewDecoder(r.Body).Decode(&powReq)
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if err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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difficulty, err := strconv.Atoi(powReq.Difficulty)
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if err != nil {
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// handle error
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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2023-11-21 10:41:56 +00:00
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// Generate proof of work for the event
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generatedEvent, err := nip13.Generate(powReq.ReqEvent, difficulty, 3*time.Hour)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// Create a response struct
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type Response struct {
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Event *nostr.Event `json:"event"`
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}
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// Respond with the generated event and the time taken
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(Response{Event: generatedEvent})
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}
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// PowRequest struct for the POST request
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type TestRequest struct {
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Difficulty string `json:"difficulty"`
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}
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// handlePOW is the handler function for the "/powgen" endpoint
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func handleTest(w http.ResponseWriter, r *http.Request) {
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if r.Method != "POST" {
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http.Error(w, "Invalid request method", http.StatusMethodNotAllowed)
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return
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}
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var powReq PowRequest
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err := json.NewDecoder(r.Body).Decode(&powReq)
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if err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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difficulty, err := strconv.Atoi(powReq.Difficulty)
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if err != nil {
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// handle error
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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// Start the timer
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start := time.Now()
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2023-11-21 10:41:56 +00:00
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event := &nostr.Event{
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Kind: nostr.KindTextNote,
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Content: "It's just me mining my own business",
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PubKey: "a48380f4cfcc1ad5378294fcac36439770f9c878dd880ffa94bb74ea54a6f243",
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}
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pow, err := nip13.Generate(event, difficulty, 3*time.Hour)
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2023-11-19 02:43:22 +00:00
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// Calculate the duration in milliseconds
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iterations, _ := strconv.ParseFloat(pow.Tags[0][1], 64)
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timeTaken := time.Since(start).Seconds()
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hashrate := iterations / time.Since(start).Seconds()
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// Create a response struct
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type Response struct {
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TimeTaken float64 `json:"timeTaken"`
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Hashrate float64 `json:"hashrate"`
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}
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// Respond with the generated event and the time taken
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w.Header().Set("Content-Type", "application/json")
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2023-11-21 10:41:56 +00:00
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json.NewEncoder(w).Encode(Response{TimeTaken: timeTaken, Hashrate: hashrate})
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}
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func corsMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Set headers
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
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w.Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
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// If it's a preflight request, respond with 200
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if r.Method == "OPTIONS" {
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w.WriteHeader(http.StatusOK)
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return
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}
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// Next
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next.ServeHTTP(w, r)
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})
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2023-11-19 02:43:22 +00:00
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}
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func main() {
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2023-11-21 10:41:56 +00:00
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http.Handle("/powgen", corsMiddleware(http.HandlerFunc(handlePOW)))
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http.Handle("/test", corsMiddleware(http.HandlerFunc(handleTest)))
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2023-11-19 02:43:22 +00:00
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2023-11-19 05:37:39 +00:00
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log.Fatal(http.ListenAndServe("0.0.0.0:8080", nil))
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2023-11-19 02:43:22 +00:00
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}
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