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| author | Antoine Riard <ariard@student.42.fr> | 2019-12-10 18:08:21 -0500 |
|---|---|---|
| committer | Antoine Riard <ariard@student.42.fr> | 2019-12-18 13:31:32 -0500 |
| commit | f41d58966995fe69df433fa684117fae74a56e66 (patch) | |
| tree | d33b90c0f525fcead4a12777766da32b60fa0e3a /src/wallet/init.cpp | |
| parent | 3d6752779f0504e6435fe682f0c06c60b5c4c33b (diff) | |
| download | bitcoin-f41d58966995fe69df433fa684117fae74a56e66.tar.xz | |
Document better -keypool as a look-ahead safety mechanism
If after a backup, an address is issued beyond the initial
keypool range and none of the addresses in this range
is seen onchain, if a wallet is restored from backup, even in
case of rescan, funds may be loss due to the look-ahead
buffer not being incremented and so restored wallet not detecting
onchain out-of-range address as derived from its seed.
This scenario is theoretically unavoidable due to the requirement
of the keypool to have a max size. However, given the default
keypool size, this is unlikely. Document better keypool size
implications to avoid user setting a too low value.
Diffstat (limited to 'src/wallet/init.cpp')
| -rw-r--r-- | src/wallet/init.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/wallet/init.cpp b/src/wallet/init.cpp index dd0d2ffbd7..2ebc9aba39 100644 --- a/src/wallet/init.cpp +++ b/src/wallet/init.cpp @@ -46,7 +46,7 @@ void WalletInit::AddWalletOptions() const gArgs.AddArg("-fallbackfee=<amt>", strprintf("A fee rate (in %s/kB) that will be used when fee estimation has insufficient data. 0 to entirely disable the fallbackfee feature. (default: %s)", CURRENCY_UNIT, FormatMoney(DEFAULT_FALLBACK_FEE)), ArgsManager::ALLOW_ANY, OptionsCategory::WALLET); - gArgs.AddArg("-keypool=<n>", strprintf("Set key pool size to <n> (default: %u)", DEFAULT_KEYPOOL_SIZE), ArgsManager::ALLOW_ANY, OptionsCategory::WALLET); + gArgs.AddArg("-keypool=<n>", strprintf("Set key pool size to <n> (default: %u). Warning: Smaller sizes may increase the risk of losing funds when restoring from an old backup, if none of the addresses in the original keypool have been used.", DEFAULT_KEYPOOL_SIZE), ArgsManager::ALLOW_ANY, OptionsCategory::WALLET); gArgs.AddArg("-maxtxfee=<amt>", strprintf("Maximum total fees (in %s) to use in a single wallet transaction; setting this too low may abort large transactions (default: %s)", CURRENCY_UNIT, FormatMoney(DEFAULT_TRANSACTION_MAXFEE)), ArgsManager::ALLOW_ANY, OptionsCategory::DEBUG_TEST); gArgs.AddArg("-mintxfee=<amt>", strprintf("Fees (in %s/kB) smaller than this are considered zero fee for transaction creation (default: %s)", |