// handleMissedTickets receives a list of hashes and some block information
// and submits it to the wstakemgr to handle SSRtx production.
func (w *Wallet) handleMissedTickets(dbtx walletdb.ReadWriteTx, blockHash *chainhash.Hash,
blockHeight int64, tickets []*chainhash.Hash) error {
stakemgrNs := dbtx.ReadWriteBucket(wstakemgrNamespaceKey)
addrmgrNs := dbtx.ReadBucket(waddrmgrNamespaceKey)
if !w.StakeMiningEnabled {
return nil
}
if blockHeight >= w.chainParams.StakeValidationHeight+1 &&
w.StakeMiningEnabled {
ntfns, err := w.StakeMgr.HandleMissedTicketsNtfn(stakemgrNs, addrmgrNs,
blockHash, blockHeight, tickets, w.AllowHighFees)
if ntfns != nil {
// Send notifications for newly created revocations by the RPC.
for _, ntfn := range ntfns {
if ntfn != nil {
// Inform the console that we've revoked our ticket.
log.Infof("Revoked missed ticket %v (tx hash: %v)",
ntfn.SStxIn,
ntfn.TxHash)
}
}
}
return err
}
return nil
}
// disconnectBlock handles a chain server reorganize by rolling back all
// block history from the reorged block for a wallet in-sync with the chain
// server.
func (w *Wallet) disconnectBlock(dbtx walletdb.ReadWriteTx, b wtxmgr.BlockMeta) error {
addrmgrNs := dbtx.ReadWriteBucket(waddrmgrNamespaceKey)
txmgrNs := dbtx.ReadWriteBucket(wtxmgrNamespaceKey)
if !w.ChainSynced() {
return nil
}
bs := waddrmgr.BlockStamp{
Height: b.Height,
Hash: b.Hash,
}
log.Infof("Disconnecting block %v, height %v", bs.Hash, bs.Height)
// Disconnect the last seen block from the manager if it matches the
// removed block.
err := w.TxStore.Rollback(txmgrNs, addrmgrNs, b.Height)
if err != nil {
return err
}
prev, err := w.TxStore.GetBlockHash(txmgrNs, b.Height-1)
if err != nil {
return err
}
prevBlock := &waddrmgr.BlockStamp{Hash: prev, Height: b.Height - 1}
err = w.Manager.SetSyncedTo(addrmgrNs, prevBlock)
if err != nil {
return err
}
// Notify interested clients of the disconnected block.
w.NtfnServer.notifyDetachedBlock(&b.Hash)
return nil
}
func (w *Wallet) extendMainChain(dbtx walletdb.ReadWriteTx, block *wtxmgr.BlockHeaderData, transactions [][]byte) error {
txmgrNs := dbtx.ReadWriteBucket(wtxmgrNamespaceKey)
log.Infof("Connecting block %v, height %v", block.BlockHash,
block.SerializedHeader.Height())
err := w.TxStore.ExtendMainChain(txmgrNs, block)
if err != nil {
return err
}
// Notify interested clients of the connected block.
var header wire.BlockHeader
header.Deserialize(bytes.NewReader(block.SerializedHeader[:]))
w.NtfnServer.notifyAttachedBlock(dbtx, &header, &block.BlockHash)
blockMeta, err := w.TxStore.GetBlockMetaForHash(txmgrNs, &block.BlockHash)
if err != nil {
return err
}
for _, serializedTx := range transactions {
err = w.processTransaction(dbtx, serializedTx,
&block.SerializedHeader, &blockMeta)
if err != nil {
return err
}
}
return nil
}
// handleWinningTickets receives a list of hashes and some block information
// and submits it to the wstakemgr to handle SSGen production.
func (w *Wallet) handleWinningTickets(dbtx walletdb.ReadWriteTx, blockHash *chainhash.Hash,
blockHeight int64, tickets []*chainhash.Hash) error {
stakemgrNs := dbtx.ReadWriteBucket(wstakemgrNamespaceKey)
addrmgrNs := dbtx.ReadBucket(waddrmgrNamespaceKey)
topBlockStamp := w.Manager.SyncedTo()
// Even if stake voting is disabled, we should still store eligible
// tickets for the current top block.
// TODO The behaviour of this is not quite right if tons of blocks
// are coming in quickly, because the address manager will end up
// out of sync with the voting channel here. This should probably
// be fixed somehow, but this should be stable for networks that
// are voting at normal block speeds.
if blockHeight >= w.chainParams.StakeValidationHeight-1 &&
topBlockStamp.Hash.IsEqual(blockHash) {
w.SetCurrentVotingInfo(blockHash, blockHeight, tickets)
}
if blockHeight >= w.chainParams.StakeValidationHeight-1 &&
w.StakeMiningEnabled {
ntfns, err := w.StakeMgr.HandleWinningTicketsNtfn(
stakemgrNs,
addrmgrNs,
blockHash,
blockHeight,
tickets,
w.VoteBits,
w.AllowHighFees,
)
if ntfns != nil {
// Send notifications for newly created votes by the RPC.
for _, ntfn := range ntfns {
// Inform the console that we've voted, too.
log.Infof("Voted on block %v (height %v) using ticket %v "+
"(vote hash: %v)",
ntfn.BlockHash,
ntfn.Height,
ntfn.SStxIn,
ntfn.TxHash)
}
}
return err
}
return nil
}
// switchToSideChain performs a chain switch, switching the main chain to the
// in-memory side chain. The old side chain becomes the new main chain.
func (w *Wallet) switchToSideChain(dbtx walletdb.ReadWriteTx) error {
addrmgrNs := dbtx.ReadBucket(waddrmgrNamespaceKey)
txmgrNs := dbtx.ReadWriteBucket(wtxmgrNamespaceKey)
sideChain := w.sideChain
if len(sideChain) == 0 {
return errors.New("no side chain to switch to")
}
sideChainForkHeight := sideChain[0].headerData.SerializedHeader.Height()
// Notify detached blocks for each removed block, in reversed order.
_, tipHeight := w.TxStore.MainChainTip(txmgrNs)
for i := tipHeight; i >= sideChainForkHeight; i-- {
hash, err := w.TxStore.GetMainChainBlockHashForHeight(txmgrNs, i)
if err != nil {
return err
}
w.NtfnServer.notifyDetachedBlock(&hash)
}
// Remove blocks on the current main chain that are at or above the
// height of the block that begins the side chain.
err := w.TxStore.Rollback(txmgrNs, addrmgrNs, sideChainForkHeight)
if err != nil {
return err
}
// Extend the main chain with each sidechain block.
for i := range sideChain {
scBlock := &sideChain[i]
err = w.extendMainChain(dbtx, &scBlock.headerData, scBlock.transactions)
if err != nil {
return err
}
}
return nil
}
func (w *Wallet) addRelevantTx(dbtx walletdb.ReadWriteTx, rec *wtxmgr.TxRecord,
block *wtxmgr.BlockMeta) error {
addrmgrNs := dbtx.ReadWriteBucket(waddrmgrNamespaceKey)
stakemgrNs := dbtx.ReadWriteBucket(wstakemgrNamespaceKey)
txmgrNs := dbtx.ReadWriteBucket(wtxmgrNamespaceKey)
// At the moment all notified transactions are assumed to actually be
// relevant. This assumption will not hold true when SPV support is
// added, but until then, simply insert the transaction because there
// should either be one or more relevant inputs or outputs.
//
// TODO This function is pretty bad corruption wise, it's very easy
// to corrupt the wallet if you ctrl+c while in this function. This
// needs desperate refactoring.
tx := dcrutil.NewTx(&rec.MsgTx)
txHash := rec.Hash
// Handle incoming SStx; store them in the stake manager if we own
// the OP_SSTX tagged out, except if we're operating as a stake pool
// server. In that case, additionally consider the first commitment
// output as well.
if is, _ := stake.IsSStx(&rec.MsgTx); is {
// Errors don't matter here. If addrs is nil, the range below
// does nothing.
txOut := tx.MsgTx().TxOut[0]
_, addrs, _, _ := txscript.ExtractPkScriptAddrs(txOut.Version,
txOut.PkScript, w.chainParams)
insert := false
for _, addr := range addrs {
_, err := w.Manager.Address(addrmgrNs, addr)
if err == nil {
// We own the voting output pubkey or script and we're
// not operating as a stake pool, so simply insert this
// ticket now.
if !w.stakePoolEnabled {
insert = true
break
} else {
// We are operating as a stake pool. The below
// function will ONLY add the ticket into the
// stake pool if it has been found within a
// block.
if block == nil {
break
}
valid, errEval := w.evaluateStakePoolTicket(rec, block,
addr)
if valid {
// Be sure to insert this into the user's stake
// pool entry into the stake manager.
poolTicket := &wstakemgr.PoolTicket{
Ticket: txHash,
HeightTicket: uint32(block.Height),
Status: wstakemgr.TSImmatureOrLive,
}
errUpdate := w.StakeMgr.UpdateStakePoolUserTickets(
stakemgrNs, addrmgrNs, addr, poolTicket)
if errUpdate != nil {
log.Warnf("Failed to insert stake pool "+
"user ticket: %s", err.Error())
}
log.Debugf("Inserted stake pool ticket %v for user %v "+
"into the stake store database", txHash, addr)
insert = true
break
}
// Log errors if there were any. At this point the ticket
// must be invalid, so insert it into the list of invalid
// user tickets.
if errEval != nil {
log.Warnf("Ticket %v failed ticket evaluation for "+
"the stake pool: %s", rec.Hash, err.Error())
}
errUpdate := w.StakeMgr.UpdateStakePoolUserInvalTickets(
stakemgrNs, addr, &rec.Hash)
if errUpdate != nil {
log.Warnf("Failed to update pool user %v with "+
"invalid ticket %v", addr.EncodeAddress(),
rec.Hash)
}
}
}
}
if insert {
err := w.StakeMgr.InsertSStx(stakemgrNs, tx, w.VoteBits)
if err != nil {
log.Errorf("Failed to insert SStx %v"+
"into the stake store.", tx.Sha())
}
}
}
// Handle incoming SSGen; store them if we own
// the ticket used to purchase them.
if is, _ := stake.IsSSGen(&rec.MsgTx); is {
if block != nil {
txInHash := tx.MsgTx().TxIn[1].PreviousOutPoint.Hash
if w.StakeMgr.CheckHashInStore(&txInHash) {
w.StakeMgr.InsertSSGen(stakemgrNs, &block.Hash,
int64(block.Height),
&txHash,
w.VoteBits.Bits,
&txInHash)
}
// If we're running as a stake pool, insert
// the stake pool user ticket update too.
if w.stakePoolEnabled {
txInHeight := tx.MsgTx().TxIn[1].BlockHeight
poolTicket := &wstakemgr.PoolTicket{
Ticket: txInHash,
HeightTicket: txInHeight,
Status: wstakemgr.TSVoted,
SpentBy: txHash,
HeightSpent: uint32(block.Height),
}
poolUser, err := w.StakeMgr.SStxAddress(stakemgrNs, &txInHash)
if err != nil {
log.Warnf("Failed to fetch stake pool user for "+
"ticket %v (voted ticket)", txInHash)
} else {
err = w.StakeMgr.UpdateStakePoolUserTickets(
stakemgrNs, addrmgrNs, poolUser, poolTicket)
if err != nil {
log.Warnf("Failed to update stake pool ticket for "+
"stake pool user %s after voting",
poolUser.EncodeAddress())
} else {
log.Debugf("Updated voted stake pool ticket %v "+
"for user %v into the stake store database ("+
"vote hash: %v)", txInHash, poolUser, txHash)
}
}
}
} else {
// If there's no associated block, it's potentially a
// doublespent SSGen. Just ignore it and wait for it
// to later get into a block.
return nil
}
}
// Handle incoming SSRtx; store them if we own
// the ticket used to purchase them.
if is, _ := stake.IsSSRtx(&rec.MsgTx); is {
if block != nil {
txInHash := tx.MsgTx().TxIn[0].PreviousOutPoint.Hash
if w.StakeMgr.CheckHashInStore(&txInHash) {
w.StakeMgr.InsertSSRtx(stakemgrNs, &block.Hash,
int64(block.Height),
&txHash,
&txInHash)
}
// If we're running as a stake pool, insert
// the stake pool user ticket update too.
if w.stakePoolEnabled {
txInHeight := tx.MsgTx().TxIn[0].BlockHeight
poolTicket := &wstakemgr.PoolTicket{
Ticket: txInHash,
HeightTicket: txInHeight,
Status: wstakemgr.TSMissed,
SpentBy: txHash,
HeightSpent: uint32(block.Height),
}
poolUser, err := w.StakeMgr.SStxAddress(stakemgrNs, &txInHash)
if err != nil {
log.Warnf("failed to fetch stake pool user for "+
"ticket %v (missed ticket)", txInHash)
} else {
err = w.StakeMgr.UpdateStakePoolUserTickets(
stakemgrNs, addrmgrNs, poolUser, poolTicket)
if err != nil {
log.Warnf("failed to update stake pool ticket for "+
"stake pool user %s after revoking",
poolUser.EncodeAddress())
} else {
log.Debugf("Updated missed stake pool ticket %v "+
"for user %v into the stake store database ("+
"revocation hash: %v)", txInHash, poolUser, txHash)
}
}
}
}
}
err := w.TxStore.InsertTx(txmgrNs, addrmgrNs, rec, block)
if err != nil {
return err
}
// Handle input scripts that contain P2PKs that we care about.
for i, input := range rec.MsgTx.TxIn {
if txscript.IsMultisigSigScript(input.SignatureScript) {
rs, err :=
txscript.MultisigRedeemScriptFromScriptSig(
input.SignatureScript)
if err != nil {
return err
}
class, addrs, _, err := txscript.ExtractPkScriptAddrs(
txscript.DefaultScriptVersion, rs, w.chainParams)
if err != nil {
// Non-standard outputs are skipped.
continue
}
if class != txscript.MultiSigTy {
// This should never happen, but be paranoid.
continue
}
isRelevant := false
for _, addr := range addrs {
_, err := w.Manager.Address(addrmgrNs, addr)
if err == nil {
isRelevant = true
err = w.Manager.MarkUsed(addrmgrNs, addr)
if err != nil {
return err
}
log.Debugf("Marked address %v used", addr)
} else {
// Missing addresses are skipped. Other errors should
// be propagated.
if !waddrmgr.IsError(err, waddrmgr.ErrAddressNotFound) {
return err
}
}
}
// Add the script to the script databases.
// TODO Markused script address? cj
if isRelevant {
err = w.TxStore.InsertTxScript(txmgrNs, rs)
if err != nil {
return err
}
var blockToUse *waddrmgr.BlockStamp
if block != nil {
blockToUse = &waddrmgr.BlockStamp{
Height: block.Height,
Hash: block.Hash,
}
}
mscriptaddr, err := w.Manager.ImportScript(addrmgrNs, rs, blockToUse)
if err != nil {
switch {
// Don't care if it's already there.
case waddrmgr.IsError(err, waddrmgr.ErrDuplicateAddress):
break
case waddrmgr.IsError(err, waddrmgr.ErrLocked):
log.Warnf("failed to attempt script importation "+
"of incoming tx script %x because addrmgr "+
"was locked", rs)
break
default:
return err
}
} else {
// This is the first time seeing this script address
// belongs to us, so do a rescan and see if there are
// any other outputs to this address.
job := &RescanJob{
Addrs: []dcrutil.Address{mscriptaddr.Address()},
OutPoints: nil,
BlockStamp: waddrmgr.BlockStamp{
Height: 0,
Hash: *w.chainParams.GenesisHash,
},
}
// Submit rescan job and log when the import has completed.
// Do not block on finishing the rescan. The rescan success
// or failure is logged elsewhere, and the channel is not
// required to be read, so discard the return value.
_ = w.SubmitRescan(job)
}
}
// If we're spending a multisig outpoint we know about,
// update the outpoint. Inefficient because you deserialize
// the entire multisig output info. Consider a specific
// exists function in wtxmgr. The error here is skipped
// because the absence of an multisignature output for
// some script can not always be considered an error. For
// example, the wallet might be rescanning as called from
// the above function and so does not have the output
// included yet.
mso, err := w.TxStore.GetMultisigOutput(txmgrNs, &input.PreviousOutPoint)
if mso != nil && err == nil {
w.TxStore.SpendMultisigOut(txmgrNs, &input.PreviousOutPoint,
rec.Hash,
uint32(i))
}
}
}
// Check every output to determine whether it is controlled by a wallet
// key. If so, mark the output as a credit.
for i, output := range rec.MsgTx.TxOut {
// Ignore unspendable outputs.
if output.Value == 0 {
continue
}
class, addrs, _, err := txscript.ExtractPkScriptAddrs(output.Version,
output.PkScript, w.chainParams)
if err != nil {
// Non-standard outputs are skipped.
continue
}
isStakeType := class == txscript.StakeSubmissionTy ||
class == txscript.StakeSubChangeTy ||
class == txscript.StakeGenTy ||
class == txscript.StakeRevocationTy
if isStakeType {
class, err = txscript.GetStakeOutSubclass(output.PkScript)
if err != nil {
log.Errorf("Unknown stake output subclass parse error "+
"encountered: %v", err)
continue
}
}
for _, addr := range addrs {
ma, err := w.Manager.Address(addrmgrNs, addr)
if err == nil {
// TODO: Credits should be added with the
// account they belong to, so wtxmgr is able to
// track per-account balances.
err = w.TxStore.AddCredit(txmgrNs, rec, block,
uint32(i), ma.Internal(), ma.Account())
if err != nil {
return err
}
err = w.Manager.MarkUsed(addrmgrNs, addr)
if err != nil {
return err
}
log.Debugf("Marked address %v used", addr)
continue
}
// Missing addresses are skipped. Other errors should
// be propagated.
if !waddrmgr.IsError(err, waddrmgr.ErrAddressNotFound) {
return err
}
}
// Handle P2SH addresses that are multisignature scripts
// with keys that we own.
if class == txscript.ScriptHashTy {
var expandedScript []byte
for _, addr := range addrs {
// Search both the script store in the tx store
// and the address manager for the redeem script.
var err error
expandedScript, err =
w.TxStore.GetTxScript(txmgrNs,
addr.ScriptAddress())
if err != nil {
return err
}
if expandedScript == nil {
scrAddr, err := w.Manager.Address(addrmgrNs, addr)
if err == nil {
sa, ok := scrAddr.(waddrmgr.ManagedScriptAddress)
if !ok {
log.Warnf("address %v is not a script"+
" address (type %T)",
scrAddr.Address().EncodeAddress(),
scrAddr.Address())
continue
}
retrievedScript, err := sa.Script()
if err != nil {
log.Errorf("failed to decode redeemscript for "+
"address %v: %v", addr.EncodeAddress(),
err.Error())
continue
}
expandedScript = retrievedScript
} else {
// We can't find this redeem script anywhere.
// Skip this output.
log.Debugf("failed to find redeemscript for "+
"address %v in address manager: %v",
addr.EncodeAddress(), err.Error())
continue
}
}
}
// Otherwise, extract the actual addresses and
// see if any belong to us.
expClass, multisigAddrs, _, err := txscript.ExtractPkScriptAddrs(
txscript.DefaultScriptVersion,
expandedScript,
w.chainParams)
if err != nil {
return err
}
// Skip non-multisig scripts.
if expClass != txscript.MultiSigTy {
continue
}
for _, maddr := range multisigAddrs {
_, err := w.Manager.Address(addrmgrNs, maddr)
// An address we own; handle accordingly.
if err == nil {
errStore := w.TxStore.AddMultisigOut(
txmgrNs, rec, block, uint32(i))
if errStore != nil {
// This will throw if there are multiple private keys
// for this multisignature output owned by the wallet,
// so it's routed to debug.
log.Debugf("unable to add multisignature output: %v",
errStore.Error())
}
}
}
}
}
// Send notification of mined or unmined transaction to any interested
// clients.
//
// TODO: Avoid the extra db hits.
if block == nil {
details, err := w.TxStore.UniqueTxDetails(txmgrNs, &rec.Hash, nil)
if err != nil {
log.Errorf("Cannot query transaction details for notifiation: %v",
err)
} else {
w.NtfnServer.notifyUnminedTransaction(dbtx, details)
}
} else {
details, err := w.TxStore.UniqueTxDetails(txmgrNs, &rec.Hash, &block.Block)
if err != nil {
log.Errorf("Cannot query transaction details for notifiation: %v",
err)
} else {
w.NtfnServer.notifyMinedTransaction(dbtx, details, block)
}
}
return nil
}
// connectBlock handles a chain server notification by marking a wallet
// that's currently in-sync with the chain server as being synced up to
// the passed block.
func (w *Wallet) connectBlock(dbtx walletdb.ReadWriteTx, b wtxmgr.BlockMeta) error {
addrmgrNs := dbtx.ReadWriteBucket(waddrmgrNamespaceKey)
txmgrNs := dbtx.ReadWriteBucket(wtxmgrNamespaceKey)
chainClient, err := w.requireChainClient()
if err != nil {
return err
}
bs := waddrmgr.BlockStamp{
Height: b.Height,
Hash: b.Hash,
}
log.Infof("Connecting block %v, height %v", bs.Hash, bs.Height)
err = w.Manager.SetSyncedTo(addrmgrNs, &bs)
if err != nil {
return err
}
// Handle automatic ticket purchasing if enabled. This function should
// not error due to an error purchasing tickets (several tickets may be
// have been purhcased and successfully published, as well as addresses
// created and used), so just log it instead.
err = w.handleTicketPurchases(dbtx)
switch err.(type) {
case nil:
case txauthor.InsufficientFundsError:
log.Debugf("Insufficient funds to auto-purchase maximum number " +
"of tickets")
default:
log.Errorf("Failed to perform automatic picket purchasing: %v", err)
}
// Insert the block if we haven't already through a relevant tx.
err = w.TxStore.InsertBlock(txmgrNs, &b)
if err != nil {
err = fmt.Errorf("Couldn't insert block %v into database: %v",
b.Hash, err)
return err
}
// Rollback testing for simulation network, if enabled.
if b.Height < rollbackTestHeight && w.rollbackTesting {
dbd, err := w.TxStore.DatabaseDump(txmgrNs, addrmgrNs, b.Height, nil)
if err != nil {
panicStr := fmt.Sprintf("Failed to dump database at connection "+
"of block %v (height %v): %v",
b.Hash,
b.Height,
err.Error())
panic(panicStr)
}
if dbd.OneConfBalance != dbd.OneConfCalcBalance {
log.Warnf("Balance calculations incongruent. The spendable "+
"balance was %v, but the recalculated spendable balance "+
"was %v",
dbd.OneConfBalance,
dbd.OneConfCalcBalance)
}
w.rollbackBlockDB[uint32(b.Height)] = dbd
}
// We've reached the height to begin the rollback testing from.
if b.Height == rollbackTestHeight && w.rollbackTesting {
log.Infof("Height for rollback testing reached, beginning " +
"database evaluations.")
finalHeight := rollbackTestHeight - rollbackTestDepth
for i := rollbackTestHeight; i >= finalHeight; i-- {
err := w.TxStore.Rollback(txmgrNs, addrmgrNs, int32(i))
if err != nil {
log.Errorf("Error rolling back block at height %v: %v",
i, err)
}
rolledbackDb, err := w.TxStore.DatabaseDump(txmgrNs, addrmgrNs, int32(i-1),
w.rollbackBlockDB[uint32(i-1)].BucketUnminedInputs)
if err != nil {
panicStr := fmt.Sprintf("Failed to dump database at "+
"disconnection of block height %v: %v",
i,
err.Error())
panic(panicStr)
}
is, errStr := w.rollbackBlockDB[uint32(i-1)].Equals(rolledbackDb,
true)
if !is {
log.Errorf("Database incongruencies detected after rolling "+
"back to block %v!\n"+
"%v",
i-1,
errStr)
} else {
log.Infof("Rollback to height %v proceeded without error.",
i-1)
}
}
w.Stop()
}
// Prune all expired transactions and all stake tickets that no longer
// meet the minimum stake difficulty.
block, err := chainClient.GetBlock(&b.Hash)
if err != nil {
return err
}
stakeDifficulty := dcrutil.Amount(block.MsgBlock().Header.SBits)
err = w.TxStore.PruneUnconfirmed(txmgrNs, bs.Height, int64(stakeDifficulty))
if err != nil {
err = fmt.Errorf("Failed to prune unconfirmed transactions when "+
"connecting block height %v: %s", bs.Height, err.Error())
return err
}
w.reorganizingLock.Lock()
isReorganizing, topHash := w.reorganizing, w.reorganizeToHash
// If we've made it to the height where the reorganization is finished,
// revert our reorganization state.
if isReorganizing && bs.Hash == topHash {
log.Infof("Wallet reorganization to block %v complete", topHash)
w.reorganizing = false
}
w.reorganizingLock.Unlock()
// Notify interested clients of the connected block.
//
// TODO: move all notifications outside of the database transaction.
w.NtfnServer.notifyAttachedBlock(dbtx, &b)
return nil
}
// onBlockConnected is the entry point for processing chain server
// blockconnected notifications.
func (w *Wallet) onBlockConnected(dbtx walletdb.ReadWriteTx, serializedBlockHeader []byte, transactions [][]byte) error {
var blockHeader wire.BlockHeader
err := blockHeader.Deserialize(bytes.NewReader(serializedBlockHeader))
if err != nil {
return err
}
block := wtxmgr.BlockHeaderData{BlockHash: blockHeader.BlockSha()}
err = copyHeaderSliceToArray(&block.SerializedHeader, serializedBlockHeader)
if err != nil {
return err
}
w.reorganizingLock.Lock()
reorg, reorgToHash := w.reorganizing, w.reorganizeToHash
w.reorganizingLock.Unlock()
if reorg {
// add to side chain
scBlock := sideChainBlock{
transactions: transactions,
headerData: block,
}
w.sideChain = append(w.sideChain, scBlock)
log.Infof("Adding block %v (height %v) to sidechain",
block.BlockHash, block.SerializedHeader.Height())
if block.BlockHash != reorgToHash {
// Nothing left to do until the later blocks are
// received.
return nil
}
err = w.switchToSideChain(dbtx)
if err != nil {
return err
}
w.sideChain = nil
w.reorganizingLock.Lock()
w.reorganizing = false
w.reorganizingLock.Unlock()
log.Infof("Wallet reorganization to block %v complete", reorgToHash)
} else {
err = w.extendMainChain(dbtx, &block, transactions)
if err != nil {
return err
}
}
height := int32(blockHeader.Height)
// Handle automatic ticket purchasing if enabled. This function should
// not error due to an error purchasing tickets (several tickets may be
// have been purhcased and successfully published, as well as addresses
// created and used), so just log it instead.
err = w.handleTicketPurchases(dbtx, height)
switch err.(type) {
case nil:
case txauthor.InsufficientFundsError:
log.Debugf("Insufficient funds to auto-purchase maximum number " +
"of tickets")
default:
log.Errorf("Failed to perform automatic picket purchasing: %v", err)
}
// Prune all expired transactions and all stake tickets that no longer
// meet the minimum stake difficulty.
txmgrNs := dbtx.ReadWriteBucket(wtxmgrNamespaceKey)
err = w.TxStore.PruneUnconfirmed(txmgrNs, height, blockHeader.SBits)
if err != nil {
log.Errorf("Failed to prune unconfirmed transactions when "+
"connecting block height %v: %s", height, err.Error())
}
return nil
}