feat: add support for relay list from json file

This commit adds the ability to specify relay lists in a json file for both import and blastr settings. This provides more flexibility in configuring the application. It also includes error handling for reading and parsing the json file.

.env.example

@@ -32,6 +32,7 @@ INBOX_PULL_INTERVAL_SECONDS=600
 IMPORT_START_DATE="2023-01-20"
 IMPORT_QUERY_INTERVAL_SECONDS=600
 IMPORT_SEED_RELAYS="relay.damus.io,nos.lol,relay.nostr.band,relay.snort.social,nostr.land,nostr.mom,relay.nos.social,relay.primal.net,relay.nostr.bg,no.str.cr,nostr21.com,nostrue.com,relay.siamstr.com,wot.utxo.one,nostrelites.org,wot.nostr.party,wot.sovbit.host,wot.girino.org,relay.lnau.net,wot.siamstr.com,wot.sudocarlos.com,relay.otherstuff.fyi,relay.lexingtonbitcoin.org,wot.azzamo.net,wot.swarmstr.com,zap.watch,satsage.xyz,wons.calva.dev"
+IMPORT_SEED_RELAYS_FILE="" # If you want to use a json file, set this to the path of the file (e.g. "relays_import.json")
 
 ## Backup Settings
 BACKUP_PROVIDER="aws"
@@ -45,6 +46,7 @@ AWS_BUCKET_NAME="utxo-relay-backups"
 
 ## Blastr Settings
 BLASTR_RELAYS="relay.damus.io,nos.lol,relay.nostr.band,relay.snort.social,nostr.land,nostr.mom,relay.nos.social,relay.primal.net,relay.nostr.bg,no.str.cr,nostr21.com,nostrue.com,relay.siamstr.com,wot.utxo.one,nostrelites.org,wot.nostr.party,wot.sovbit.host,wot.girino.org,relay.lnau.net,wot.siamstr.com,wot.sudocarlos.com,relay.otherstuff.fyi,relay.lexingtonbitcoin.org,wot.azzamo.net,wot.swarmstr.com,zap.watch,satsage.xyz,wons.calva.dev"
+BLASTR_RELAYS_FILE="" # If you want to use a json file, set this to the path of the file (e.g. "relays_blastr.json")
 
 ## OPTIONAL: Docker UID and GID - should be the same as the user running the docker container
 DOCKER_UID=1000

config.go

@@ -5,6 +5,8 @@ import (
 	"os"
 	"strconv"
 	"strings"
+	"encoding/json"
+	"io/ioutil"
 
 	"github.com/joho/godotenv"
 )
@@ -48,6 +50,20 @@ type AwsConfig struct {
 	Bucket          string `json:"bucket"`
 }
 
+func getRelayListFromEnvOrFile(envKey, fileKey string) []string {
+	envValue := getEnv(envKey)
+	if envValue != "" {
+		return getRelayList(envValue)
+	}
+
+	filePath := getEnv(fileKey)
+	if filePath != "" {
+		return getRelayListFromFile(filePath)
+	}
+
+	return []string{}
+}
+
 func loadConfig() Config {
 	godotenv.Load(".env")
 
@@ -77,10 +93,10 @@ func loadConfig() Config {
 		InboxPullIntervalSeconds:         getEnvInt("INBOX_PULL_INTERVAL_SECONDS", 3600),
 		ImportStartDate:                  getEnv("IMPORT_START_DATE"),
 		ImportQueryIntervalSeconds:       getEnvInt("IMPORT_QUERY_INTERVAL_SECONDS", 360000),
-		ImportSeedRelays:                 getRelayList(getEnv("IMPORT_SEED_RELAYS")),
+		ImportSeedRelays:                 getRelayListFromEnvOrFile("IMPORT_SEED_RELAYS", "IMPORT_SEED_RELAYS_FILE"),
 		BackupProvider:                   getEnv("BACKUP_PROVIDER"),
 		BackupIntervalHours:              getEnvInt("BACKUP_INTERVAL_HOURS", 24),
-		BlastrRelays:                     getRelayList(getEnv("BLASTR_RELAYS")),
+		BlastrRelays:                     getRelayListFromEnvOrFile("BLASTR_RELAYS", "BLASTR_RELAYS_FILE"),
 	}
 }
 
@@ -92,6 +108,23 @@ func getRelayList(commaList string) []string {
 	return relayList
 }
 
+func getRelayListFromFile(filePath string) []string {
+	file, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		log.Fatalf("Failed to read file: %s", err)
+	}
+
+	var relayList []string
+	if err := json.Unmarshal(file, &relayList); err != nil {
+		log.Fatalf("Failed to parse JSON: %s", err)
+	}
+
+	for i, relay := range relayList {
+		relayList[i] = "wss://" + strings.TrimSpace(relay)
+	}
+	return relayList
+}
+
 func getEnv(key string) string {
 	value, exists := os.LookupEnv(key)
 	if !exists {

relays_blastr.json

@@ -0,0 +1,30 @@
+[
+  "relay.damus.io",
+  "nos.lol",
+  "relay.nostr.band",
+  "relay.snort.social",
+  "nostr.land",
+  "nostr.mom",
+  "relay.nos.social",
+  "relay.primal.net",
+  "relay.nostr.bg",
+  "no.str.cr",
+  "nostr21.com",
+  "nostrue.com",
+  "relay.siamstr.com",
+  "wot.utxo.one",
+  "nostrelites.org",
+  "wot.nostr.party",
+  "wot.sovbit.host",
+  "wot.girino.org",
+  "relay.lnau.net",
+  "wot.siamstr.com",
+  "wot.sudocarlos.com",
+  "relay.otherstuff.fyi",
+  "relay.lexingtonbitcoin.org",
+  "wot.azzamo.net",
+  "wot.swarmstr.com",
+  "zap.watch",
+  "satsage.xyz",
+  "wons.calva.dev"
+]

relays_import.json

@@ -0,0 +1,30 @@
+[
+  "relay.damus.io",
+  "nos.lol",
+  "relay.nostr.band",
+  "relay.snort.social",
+  "nostr.land",
+  "nostr.mom",
+  "relay.nos.social",
+  "relay.primal.net",
+  "relay.nostr.bg",
+  "no.str.cr",
+  "nostr21.com",
+  "nostrue.com",
+  "relay.siamstr.com",
+  "wot.utxo.one",
+  "nostrelites.org",
+  "wot.nostr.party",
+  "wot.sovbit.host",
+  "wot.girino.org",
+  "relay.lnau.net",
+  "wot.siamstr.com",
+  "wot.sudocarlos.com",
+  "relay.otherstuff.fyi",
+  "relay.lexingtonbitcoin.org",
+  "wot.azzamo.net",
+  "wot.swarmstr.com",
+  "zap.watch",
+  "satsage.xyz",
+  "wons.calva.dev"
+]