Commit 28587f2e authored by Jeremy Bokobza's avatar Jeremy Bokobza

better handling of the case where the chain is (for some reason) behind the wallet tip.

parent 636a9bdb
...@@ -36,16 +36,33 @@ namespace Breeze.Wallet ...@@ -36,16 +36,33 @@ namespace Breeze.Wallet
/// <inheritdoc /> /// <inheritdoc />
public Task Initialize() public Task Initialize()
{ {
this.walletTip = this.chain.GetBlock(this.walletManager.WalletTipHash);
if (this.walletTip == null)
throw new WalletException("the wallet tip was not found in the main chain");
// if there is no wallet created yet, the wallet tip is the chain tip. // if there is no wallet created yet, the wallet tip is the chain tip.
if (!this.walletManager.Wallets.Any()) if (!this.walletManager.Wallets.Any())
{ {
this.walletTip = this.chain.Tip; this.walletTip = this.chain.Tip;
} }
else
{
this.walletTip = this.chain.GetBlock(this.walletManager.WalletTipHash);
if (this.walletTip == null)
{
// the wallet tip was not found in the main chain.
// this can happen if the node crashes unexpectedly.
// to recover we need to find the first common fork
// with the best chain, as the wallet does not have a
// list of chain headers we use a BlockLocator and persist
// that in the wallet. the block locator will help finding
// a common fork and bringing the wallet back to a good
// state (behind the best chain)
var locators = this.walletManager.Wallets.First().BlockLocator;
BlockLocator blockLocator = new BlockLocator { Blocks = locators.ToList() };
var fork = this.chain.FindFork(blockLocator);
this.walletManager.RemoveBlocks(fork);
this.walletManager.WalletTipHash = fork.HashBlock;
this.walletTip = fork;
}
}
// subscribe to receiving blocks and transactions // subscribe to receiving blocks and transactions
BlockSubscriber sub = new BlockSubscriber(this.signals.Blocks, new BlockObserver(this)); BlockSubscriber sub = new BlockSubscriber(this.signals.Blocks, new BlockObserver(this));
......
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