get nostr relays per user

nostr-relays-for-user.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+# get-relays.sh — fetch a NIP-65 relay list (kind:10002) for a pubkey using nak + jq
+# deps: nak, jq
+# usage:
+#   export author=<hex-pubkey>
+#   ./get-relays.sh
+#   RELAYS="wss://relay.damus.io wss://nos.lol" ./get-relays.sh   # optional custom relay set
+
+set -euo pipefail
+
+if [[ -z "${author:-}" ]]; then
+    echo "error: set \$author to the user's hex pubkey." >&2
+    exit 1
+fi
+
+# You can override the relay set via RELAYS env var (space-separated).
+# These defaults are a balanced, commonly reachable mix.
+read -r -a RELAY_LIST <<<"${RELAYS:-wss://relay.damus.io wss://nos.lol wss://nostr.wine wss://relay.primal.net wss://nostr.mom wss://nostr.fmt.wiz.biz wss://relay.nostr.band}"
+
+nak req -k 10002 -a "$author" "${RELAY_LIST[@]}" |
+    jq -r -s '
+      (sort_by(.created_at)|last).tags
+      | map(select(.[0]=="r"))
+      | .[]
+      | .[1]
+    '