Martin Zumsande joins us to tell us about the address spam in the summer of 2021 and his interests in AddrRelay and Bitcoin Core development.

We discuss with Martin:

- His background (1:38)

- Getting interested in Bitcoin (2:45)

- How to approach P2P (3:55)

- The network is changing (7:30)

- What's the purpose of the Address Manager (AddrMan)? (9:33)Peering differences to LN nodes (11:00)

  - Ethan Heilman's talk on Network Partitioning Attacks (12:10)

  - Addrman and eclipse attacks (12:27)

- AddrRelay and the role of node addresses (12:55)Getting connected to the network (13:37)

- Self-announcements (14:25)

- Address spam in summer 2021 and peer distribution (15:05)

- Correction: The peer would not get addresses-divided-by-peers addresses, but 2×addresses-divided-by-peers addresses as the addresses get forwarded to two peers each. (18:00)

- Estimating the Node Degree of Public Peers and Detecting Sybil Peers Based on Address Messages in the Bitcoin P2P Network by Matthias Grundmann (19:30)

- Simulating the network (20:15)

- Requesting addresses from peers (21:45)

- Walking through first connection of a node (25:25)Coinscope paper (27:10)

- Being a Bitcoin Core contributor (27:50)

Thanks to Emily Kee for the sound engineering.