Merge bitcoin/bitcoin#22762: Raise InitError when peers.dat is invalid or corrupted

fa55c3dc1b4bbdc6a53bd11fa6c0b2ec6bbb64ae Raise InitError when peers.dat is invalid or corrupted (MarcoFalke)
fa4e2ccfd8ae96c381947285bef47cb39474ac89 Inline ReadPeerAddresses (MarcoFalke)
fa5aeec80c6cdca9ca027d80dff3b397911ff2c2 Move LoadAddrman from init to addrdb (MarcoFalke)

Pull request description:

  peers.dat is silently erased when it can not be parsed or when it appears corrupted. Fix that by notifying the user. This might help in the following examples:

  * The user provided the database, but picked the wrong one.
  * A future version of Bitcoin Core wrote the file and it can't be read.
  * The file was corrupted by a logic bug in Bitcoin Core.
  * The file was corrupted by a disk failure.

ACKs for top commit:
  jonatack:
    Code review re-ACK fa55c3dc1b4bbdc6a53bd11fa6c0b2ec6bbb64ae per `git range-diff eb1f570 fa59c6d fa55c3` and verified the new tests fail on master, except "Check mocked addrman is valid", as expected
  prayank23:
    tACK https://github.com/bitcoin/bitcoin/commit/fa55c3dc1b4bbdc6a53bd11fa6c0b2ec6bbb64ae
  vasild:
    ACK fa55c3dc1b4bbdc6a53bd11fa6c0b2ec6bbb64ae

Tree-SHA512: 78264a78ee570a3c3262cf9c8542b5ffaffa5f52da1eef66c8c381f346989272967cfe1769c573502d9d7d3f7ad68c3ac3b2ec734185d2e4e7595b7122b14196

1 files changed, 20 insertions, 14 deletions

diff --git a/test/functional/feature_addrman.py b/test/functional/feature_addrman.py
index 8ccff340f0..ee421c89b5 100755
--- a/test/functional/feature_addrman.py
+++ b/test/functional/feature_addrman.py
@@ -10,6 +10,7 @@ import struct
 from test_framework.messages import ser_uint256, hash256
 from test_framework.p2p import MAGIC_BYTES
 from test_framework.test_framework import BitcoinTestFramework
+from test_framework.test_node import ErrorMatch
 from test_framework.util import assert_equal
 
 
@@ -43,6 +44,12 @@ class AddrmanTest(BitcoinTestFramework):
 
     def run_test(self):
         peers_dat = os.path.join(self.nodes[0].datadir, self.chain, "peers.dat")
+        init_error = lambda reason: (
+            f"Error: Invalid or corrupt peers.dat \\({reason}\\). If you believe this "
+            f"is a bug, please report it to {self.config['environment']['PACKAGE_BUGREPORT']}. "
+            f'As a workaround, you can move the file \\("{peers_dat}"\\) out of the way \\(rename, '
+            "move, or delete\\) to have a new one created on the next start."
+        )
 
         self.log.info("Check that mocked addrman is valid")
         self.stop_node(0)
@@ -54,30 +61,29 @@ class AddrmanTest(BitcoinTestFramework):
         self.log.info("Check that addrman from future cannot be read")
         self.stop_node(0)
         write_addrman(peers_dat, lowest_compatible=111)
-        with self.nodes[0].assert_debug_log([
-                f'ERROR: DeserializeDB: Deserialize or I/O error - Unsupported format of addrman database: 1. It is compatible with formats >=111, but the maximum supported by this version of {self.config["environment"]["PACKAGE_NAME"]} is 3.',
-                "Recreating peers.dat",
-        ]):
-            self.start_node(0)
-        assert_equal(self.nodes[0].getnodeaddresses(), [])
+        self.nodes[0].assert_start_raises_init_error(
+            expected_msg=init_error(
+                "Unsupported format of addrman database: 1. It is compatible with "
+                "formats >=111, but the maximum supported by this version of "
+                f"{self.config['environment']['PACKAGE_NAME']} is 3.: (.+)"
+            ),
+            match=ErrorMatch.FULL_REGEX,
+        )
 
         self.log.info("Check that corrupt addrman cannot be read")
         self.stop_node(0)
         with open(peers_dat, "wb") as f:
             f.write(serialize_addrman()[:-1])
-        with self.nodes[0].assert_debug_log([
-                "ERROR: DeserializeDB: Deserialize or I/O error - CAutoFile::read: end of file",
-                "Recreating peers.dat",
-        ]):
-            self.start_node(0)
-        assert_equal(self.nodes[0].getnodeaddresses(), [])
+        self.nodes[0].assert_start_raises_init_error(
+            expected_msg=init_error("CAutoFile::read: end of file.*"),
+            match=ErrorMatch.FULL_REGEX,
+        )
 
         self.log.info("Check that missing addrman is recreated")
         self.stop_node(0)
         os.remove(peers_dat)
         with self.nodes[0].assert_debug_log([
-                f"Missing or invalid file {peers_dat}",
-                "Recreating peers.dat",
+                f'Creating peers.dat because the file was not found ("{peers_dat}")',
         ]):
             self.start_node(0)
         assert_equal(self.nodes[0].getnodeaddresses(), [])