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DeStream-public
Breeze
Commits
af016950
Commit
af016950
authored
Jun 15, 2017
by
Dan Gershony
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Reorg on the light wallet
parent
398ec79f
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1 changed file
with
39 additions
and
7 deletions
+39
-7
LightWalletSyncManager.cs
Breeze/src/Breeze.Wallet/LightWalletSyncManager.cs
+39
-7
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Breeze/src/Breeze.Wallet/LightWalletSyncManager.cs
View file @
af016950
...
...
@@ -9,6 +9,7 @@ using Stratis.Bitcoin.Notifications;
using
Stratis.Bitcoin.Utilities
;
using
Stratis.Bitcoin.Wallet
;
using
Stratis.Bitcoin.Wallet.Notifications
;
using
System.Collections.Generic
;
namespace
Breeze.Wallet
{
...
...
@@ -21,6 +22,8 @@ namespace Breeze.Wallet
private
readonly
ILogger
logger
;
private
readonly
Signals
signals
;
private
ChainedBlock
lastReceivedBlock
;
public
LightWalletSyncManager
(
ILoggerFactory
loggerFactory
,
IWalletManager
walletManager
,
ConcurrentChain
chain
,
Network
network
,
BlockNotification
blockNotification
,
Signals
signals
)
// :base(loggerFactory, walletManager, chain, network)
{
...
...
@@ -35,6 +38,10 @@ namespace Breeze.Wallet
/// <inheritdoc />
public
async
Task
Initialize
()
{
this
.
lastReceivedBlock
=
this
.
chain
.
GetBlock
(
this
.
walletManager
.
LastReceivedBlock
);
if
(
this
.
lastReceivedBlock
==
null
)
throw
new
WalletException
(
"the wallet tip was not found in the main chain"
);
// get the chain headers. This needs to be up-to-date before we really do anything
await
this
.
WaitForChainDownloadAsync
();
...
...
@@ -106,16 +113,41 @@ namespace Breeze.Wallet
/// <inheritdoc />
public
void
ProcessBlock
(
Block
block
)
{
var
chainedBlock
=
this
.
chain
.
GetBlock
(
block
.
GetHash
());
// if the newly received block is too far forward, ignore it (for example when we start receiving blocks before the wallets start their syncing)
if
(
chainedBlock
.
Height
>
this
.
walletManager
.
LastBlockHeight
()
+
1
)
// if the new block previous hash is the same as the
// wallet hash then just pass the block to the manager
if
(
block
.
Header
.
HashPrevBlock
!=
this
.
lastReceivedBlock
.
HashBlock
)
{
this
.
logger
.
LogDebug
(
$"block received with height:
{
chainedBlock
.
Height
}
and hash:
{
block
.
Header
.
GetHash
()}
is too far in advance. Ignoring."
);
return
;
// if previous block does not match there might have
// been a reorg, check if the wallet is still on the main chain
var
current
=
this
.
chain
.
GetBlock
(
this
.
lastReceivedBlock
.
HashBlock
);
if
(
current
==
null
)
{
// the current wallet hash was not found on the main chain
// a reorg happenend so bring the wallet back top the last known fork
var
blockstoremove
=
new
List
<
uint256
>();
var
fork
=
this
.
lastReceivedBlock
;
// we walk back the chained block object to find the fork
while
(
this
.
chain
.
GetBlock
(
fork
.
HashBlock
)
==
null
)
{
blockstoremove
.
Add
(
fork
.
HashBlock
);
fork
=
fork
.
Previous
;
}
this
.
walletManager
.
RemoveBlocks
(
fork
);
}
else
if
(
current
.
Height
>
this
.
lastReceivedBlock
.
Height
)
{
// the wallet is falling behind we need to catch up
this
.
logger
.
LogDebug
(
$"block received with height:
{
current
.
Height
}
and hash:
{
block
.
Header
.
GetHash
()}
is too far in advance. Ignoring."
);
this
.
SyncFrom
(
this
.
lastReceivedBlock
.
Height
);
return
;
}
}
this
.
walletManager
.
ProcessBlock
(
block
);
var
chainedBlock
=
this
.
chain
.
GetBlock
(
block
.
GetHash
());
this
.
walletManager
.
ProcessBlock
(
block
,
chainedBlock
);
}
/// <inheritdoc />
...
...
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