p2p: bootstrap peers via DNS TXT seeds #219
Description
Goal
Avoid hard-coded bootstrap IPs by resolving DNS seed records and dialing multiaddrs.
Scope
- Add config:
[network].bootstrap_dns_seeds = ["seed1.example.org", ...] - Define TXT record format (multiaddr strings), e.g.
/ip4/x.x.x.x/tcp/30333 - Resolve all TXT records at startup and periodically refresh
- Merge resolved seeds into the dial list; support growth over time
- Document recommended DNS layout (seed1/seed2/seed3) and TTL guidance
Acceptance criteria
- A new node can join using only DNS seeds (no IPs in config)
- Seeds can change IPs without requiring node reconfig