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Merge bitcoin/bitcoin#24201: p2p: Avoid InitError when downgrading peers.dat

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d41ed32153 p2p: Avoid InitError when downgrading peers.dat (junderw)

Pull request description:

  fixes #24188 (also see https://github.com/bitcoin/bitcoin/pull/22762#issuecomment-951063826)
  When downgrading, a peers.dat with a future version that has a minimum
  required version larger than the downgraded Bitcoin Core version would cause an InitError.

  This commit changes this behavior to overwrite the existing peers.dat with
  a new empty one.

ACKs for top commit:
  prayank23:
    reACK d41ed32153
  kallewoof:
    reACK d41ed32153

Tree-SHA512: c8e625fe36ce0b1aab6c8ef7241c8954038bb856f2de27bdc4814dc9a60e51be28815c7d77d0f96eace49687a0cea02deb713978bbd3a5add742f50a675f2a40
This commit is contained in:
MarcoFalke
2022-02-25 08:45:03 +01:00
parent f1ce67f09f d41ed32153
commit b00b60ed4f
4 changed files with 24 additions and 10 deletions
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9
src/addrdb.cpp
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@@ -197,6 +197,15 @@ std::optional<bilingual_str> LoadAddrman(const std::vector<bool>& asmap, const A
addrman = std::make_unique<AddrMan>(asmap, /* deterministic */ false, /* consistency_check_ratio */ check_addrman);
LogPrintf("Creating peers.dat because the file was not found (%s)\n", fs::quoted(fs::PathToString(path_addr)));
DumpPeerAddresses(args, *addrman);
} catch (const InvalidAddrManVersionError&) {
if (!RenameOver(path_addr, (fs::path)path_addr + ".bak")) {
addrman = nullptr;
return strprintf(_("Failed to rename invalid peers.dat file. Please move or delete it and try again."));
}
// Addrman can be in an inconsistent state after failure, reset it
addrman = std::make_unique<AddrMan>(asmap, /* deterministic */ false, /* consistency_check_ratio */ check_addrman);
LogPrintf("Creating new peers.dat because the file version was not compatible (%s). Original backed up to peers.dat.bak\n", fs::quoted(fs::PathToString(path_addr)));
DumpPeerAddresses(args, *addrman);
} catch (const std::exception& e) {
addrman = nullptr;
return strprintf(_("Invalid or corrupt peers.dat (%s). If you believe this is a bug, please report it to %s. As a workaround, you can move the file (%s) out of the way (rename, move, or delete) to have a new one created on the next start."),