Set up dnsaddr link TXT recrod for bootstrap addresses

To avoid updating bootstrap .pi files every time identities change set
up dnsaddr link using DNS TXT records for the network that is being
deployed.

Fixes #1598

ansible/setup_fildev_network.bash

@@ -123,13 +123,13 @@ EOF
   # generate multiaddrs for the bootstrap peers
   bootstrap_multiaddrs=( $(ansible -o -i $hostfile -b -m debug -a 'msg="/dns4/{{ ansible_host }}/tcp/{{ lotus_libp2p_port }}/p2p/{{ lotus_libp2p_address }}"' bootstrap | sed 's/.* =>//' | jq -r '.msg') )
 
+  # Update dnsaddr link to bootstrap peers
+  ../scripts/update_bootstrap_dnsaddrs.bash "${network}" "${bootstrap_multiaddrs[@]}"
+
   pushd "$lotus_src"
     rm -f ./build/genesis/${network_flag}.car || true
-    truncate -s 0 ./build/bootstrap/${network_flag}.pi
-
-    for multiaddr in ${bootstrap_multiaddrs[@]}; do
-      echo $multiaddr >> ./build/bootstrap/${network_flag}.pi
-    done
+    # Override bootstrap.pi file even though it doesn't change in case we are deploying a Lotus branch that does not use dnsaddr link.
+    echo "/dnsaddr/bootstrap.${network}" > ./build/bootstrap/${network_flag}.pi
   popd
 
   read -p "Press enter to continue"

scripts/update_bootstrap_dnsaddrs.bash

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+# Ensure correct usage: at least 2 arguments (network-name and one or more bootstrap multiaddr)
+[[ $# -lt 2 ]] && { echo "Usage: $0 <network-name> <multiaddr>..."; exit 1; }
+
+NETWORK_NAME=${1}
+
+# Extract the domain name
+DOMAIN_NAME=$(
+  case ${NETWORK_NAME} in
+  butterflynet) printf 'butterfly.fildev.network' ;;
+  *) exit 1 ;;
+  esac
+) || {
+  echo "❌ Unknown network: ${NETWORK_NAME}"
+  exit 1
+}
+echo "✅ Using domain name: ${DOMAIN_NAME}"
+shift 1
+
+# Find the Route53 hosted zone ID from domain name.
+LIST_OUTPUT=$(aws route53 list-hosted-zones-by-name --dns-name "${DOMAIN_NAME}" --query 'HostedZones[0].Id' --output text  2>&1) || {
+  echo "❌ Hosted zone not found for '${NETWORK_NAME}' network with domain '${DOMAIN_NAME}':"
+  echo "${LIST_OUTPUT}"
+  exit 1
+}
+HOSTED_ZONE_ID=${LIST_OUTPUT#/hostedzone/}
+echo "✅ Found hosted zone ID for domain: ${HOSTED_ZONE_ID}"
+
+# Create an array of ResourceRecords, each prefixed with "dnsaddr=" and remove tailing comma.
+# See addressing spec:
+#  - https://github.com/libp2p/specs/blob/master/addressing/README.md#dnsaddr-links
+RESOURCE_RECORDS=$(printf '{"Value": "\\"dnsaddr=%s\\""},' "$@")
+RESOURCE_RECORDS=${RESOURCE_RECORDS%,}
+
+# Submit the change batch to upsert the TXT record and capture the change ID.
+CHANGE_OUTPUT=$(aws route53 change-resource-record-sets \
+  --hosted-zone-id "${HOSTED_ZONE_ID}" \
+  --change-batch '{
+    "Changes": [{
+      "Action": "UPSERT",
+      "ResourceRecordSet": {
+        "Name": "_dnsaddr.bootstrap.'"${DOMAIN_NAME}"'",
+        "Type": "TXT",
+        "TTL": 300,
+        "ResourceRecords": ['"${RESOURCE_RECORDS}"']
+      }
+    }]
+  }' --query 'ChangeInfo.Id' --output text 2>&1) || {
+  echo '❌ Failed to submit TXT record changes:'
+  echo "${CHANGE_OUTPUT}"
+  exit 1
+}
+
+echo '✅ Change submitted successfully. Waiting for the changes to propagate...'
+aws route53 wait resource-record-sets-changed --id "${CHANGE_OUTPUT}" || {
+  echo '❌ Failed to propagate the TXT record.'
+  exit 1
+}
+
+echo "✅ Bootstrap dnsaddr for ${NETWORK_NAME} network propagated successfully:"
+echo "     /dnsaddr/bootstrap.${DOMAIN_NAME}"