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wallet: background sync with just the view key

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- When background syncing, the wallet wipes the spend key
from memory and processes all new transactions. The wallet saves
all receives, spends, and "plausible" spends of receives the
wallet does not know key images for.
- When background sync disabled, the wallet processes all
background synced txs and then clears the background sync cache.
- Adding "plausible" spends to the background sync cache ensures
that the wallet does not need to query the daemon to see if any
received outputs were spent while background sync was enabled.
This would harm privacy especially for users of 3rd party daemons.
- To enable the feature in the CLI wallet, the user can set
background-sync to reuse-wallet-password or
custom-background-password and the wallet automatically syncs in
the background when the wallet locks, then processes all
background synced txs when the wallet is unlocked.
- The custom-background-password option enables the user to
open a distinct background wallet that only has a view key saved
and can be opened/closed/synced separately from the main wallet.
When the main wallet opens, it processes the background wallet's
cache.
- To enable the feature in the RPC wallet, there is a new
`/setup_background_sync` endpoint.
- HW, multsig and view-only wallets cannot background sync.
This commit is contained in:
j-berman 2022-10-13 18:33:33 -07:00
parent cc73fe7116
commit e71c8bf190
20 changed files with 2340 additions and 132 deletions
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64
src/wallet/wallet_rpc_server_commands_defs.h
View file

@ -2700,5 +2700,69 @@ namespace wallet_rpc
typedef epee::misc_utils::struct_init<response_t> response;
};
struct COMMAND_RPC_SETUP_BACKGROUND_SYNC
{
struct request_t
{
std::string background_sync_type;
std::string wallet_password;
std::string background_cache_password;
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(background_sync_type)
KV_SERIALIZE(wallet_password)
KV_SERIALIZE_OPT(background_cache_password, (std::string)"")
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<request_t> request;
struct response_t
{
BEGIN_KV_SERIALIZE_MAP()
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<response_t> response;
};
struct COMMAND_RPC_START_BACKGROUND_SYNC
{
struct request_t
{
BEGIN_KV_SERIALIZE_MAP()
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<request_t> request;
struct response_t
{
BEGIN_KV_SERIALIZE_MAP()
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<response_t> response;
};
struct COMMAND_RPC_STOP_BACKGROUND_SYNC
{
struct request_t
{
std::string wallet_password;
std::string seed;
std::string seed_offset;
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(wallet_password)
KV_SERIALIZE_OPT(seed, (std::string)"")
KV_SERIALIZE_OPT(seed_offset, (std::string)"")
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<request_t> request;
struct response_t
{
BEGIN_KV_SERIALIZE_MAP()
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<response_t> response;
};
}
}