2ef33e936e contrib: update testnet torv3 hardcoded seeds (Jon Atack)
Pull request description:
As a follow-up to https://github.com/bitcoin/bitcoin/issues/13550 and #22060, replace the mostly unreachable testnet torv3 hardcoded seeds from v0.22 with new ones that are consistently reachable recently and that have service bit 1 set.
This needs to be done before v24.0 to make sure onion-only testnet nodes can still connect to the network.
Ways to test:
- Re-generate `src/chainparamsseeds.h` with `cd contrib/seeds && python3 generate-seeds.py . > ../../src/chainparamsseeds.h`, check if git tree stays the same
- Re-compile and create a new testnet node with `bitcoind -testnet -dnsseed=0 -onlynet=onion -proxy=127.0.0.1:9050` (or delete `~/.bitcoin/testnet3/peers.dat` and launch bitcoind with `-testnet -dnsseed=0`). Make sure there are no `addnode=` in your `bitcoin.conf`. The debug log should print "Adding fixed seeds". Check if the node is able to connect to the network and get blocks with for ex. `watch -t ./src/bitcoin-cli -testnet -rpcwait -netinfo 4`
- Check the addrman contains the seeds by running for ex. `bitcoin-cli -rpcwait -testnet getnodeaddresses 0 onion | jq -r '.[] | (.address + ":" + (.port|tostring) + " " + (.services|tostring))' | sort`
- Check if the addresses are connectable, for ex. with this python script by laanwj:
```python3
#!/usr/bin/env python3
import pprint
import subprocess
with open('contrib/seeds/nodes_test.txt') as f:
for line in (line for line in (line.rstrip().split('#', 1)[0] for line in f) if line):
pprint.pprint(line)
subprocess.call(["nc", "-v", "-x", "127.0.0.1:9050", "-z"] + line.split(':'))
```
Thanks to satsie (Stacie Waleyko) for help with the list.
ACKs for top commit:
satsie:
ACK 2ef33e936e
laanwj:
ACK 2ef33e936e
Tree-SHA512: 72d27ecba243089bd49c11e921855fba626a1e09ae9b17508254a3bbec4bec341ed6c3d5a4eabc2d37f20bafb8a47ecc7d125e0dda956512a9525ad83273ffd6
Stats:
```
IPv4 IPv6 Onion Pass
426728 59523 7900 Initial
426728 59523 7900 Skip entries with invalid address
426728 59523 7900 After removing duplicates
426727 59523 7900 Skip entries from suspicious hosts
123226 51785 7787 Enforce minimal number of blocks
121710 51322 7586 Require service bit 1
4706 1427 3749 Require minimum uptime
4124 1098 3681 Require a known and recent user agent
4033 1075 3681 Filter out hosts with multiple bitcoin ports
512 140 512 Look up ASNs and limit results per ASN and per net
```
Update hardcoded seeds from seeds_emzy.txt seeds_lukejr.txt
seeds_sipa.txt seeds_sjors.txt, according to release process.
Output from makeseeds.py:
```
IPv4 IPv6 Onion Pass
1364173 244127 2454 Initial
1364173 244127 2454 Skip entries with invalid address
1129552 213117 2345 After removing duplicates
1129548 213117 2345 Skip entries from suspicious hosts
338216 191944 2249 Enforce minimal number of blocks
336851 188993 2189 Require service bit 1
6998 1520 150 Require minimum uptime
5682 1290 89 Require a known and recent user agent
5622 1279 89 Filter out hosts with multiple bitcoin ports
512 146 89 Look up ASNs and limit results per ASN and per net
```
This makes it possible for a node with `-onlynet=tor` to bootstrap
itself.
It also adds the base infrastructure for adding IPv6 seed nodes.
Also represent IPv4 fixed seed addresses in 16-byte format.
