// InsertBlock inserts raw block and transaction data from a block into the
// database. The first block inserted into the database will be treated as the
// genesis block. Every subsequent block insert requires the referenced parent
// block to already exist.
func (db *LevelDb) InsertBlock(block *btcutil.Block) (height int64, rerr error) {
db.dbLock.Lock()
defer db.dbLock.Unlock()
defer func() {
if rerr == nil {
rerr = db.processBatches()
} else {
db.lBatch().Reset()
}
}()
blocksha := block.Sha()
mblock := block.MsgBlock()
rawMsg, err := block.Bytes()
if err != nil {
log.Warnf("Failed to obtain raw block sha %v", blocksha)
return 0, err
}
txloc, err := block.TxLoc()
if err != nil {
log.Warnf("Failed to obtain raw block sha %v", blocksha)
return 0, err
}
// Insert block into database
newheight, err := db.insertBlockData(blocksha, &mblock.Header.PrevBlock,
rawMsg)
if err != nil {
log.Warnf("Failed to insert block %v %v %v", blocksha,
&mblock.Header.PrevBlock, err)
return 0, err
}
// At least two blocks in the long past were generated by faulty
// miners, the sha of the transaction exists in a previous block,
// detect this condition and 'accept' the block.
for txidx, tx := range mblock.Transactions {
txsha, err := block.TxSha(txidx)
if err != nil {
log.Warnf("failed to compute tx name block %v idx %v err %v", blocksha, txidx, err)
return 0, err
}
spentbuflen := (len(tx.TxOut) + 7) / 8
spentbuf := make([]byte, spentbuflen, spentbuflen)
if len(tx.TxOut)%8 != 0 {
for i := uint(len(tx.TxOut) % 8); i < 8; i++ {
spentbuf[spentbuflen-1] |= (byte(1) << i)
}
}
err = db.insertTx(txsha, newheight, txloc[txidx].TxStart, txloc[txidx].TxLen, spentbuf)
if err != nil {
log.Warnf("block %v idx %v failed to insert tx %v %v err %v", blocksha, newheight, &txsha, txidx, err)
return 0, err
}
// Some old blocks contain duplicate transactions
// Attempt to cleanly bypass this problem by marking the
// first as fully spent.
// http://blockexplorer.com/b/91812 dup in 91842
// http://blockexplorer.com/b/91722 dup in 91880
if newheight == 91812 {
dupsha, err := wire.NewShaHashFromStr("d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599")
if err != nil {
panic("invalid sha string in source")
}
if txsha.IsEqual(dupsha) {
// marking TxOut[0] as spent
po := wire.NewOutPoint(dupsha, 0)
txI := wire.NewTxIn(po, []byte("garbage"))
var spendtx wire.MsgTx
spendtx.AddTxIn(txI)
err = db.doSpend(&spendtx)
if err != nil {
log.Warnf("block %v idx %v failed to spend tx %v %v err %v", blocksha, newheight, &txsha, txidx, err)
}
}
}
if newheight == 91722 {
dupsha, err := wire.NewShaHashFromStr("e3bf3d07d4b0375638d5f1db5255fe07ba2c4cb067cd81b84ee974b6585fb468")
if err != nil {
panic("invalid sha string in source")
}
if txsha.IsEqual(dupsha) {
// marking TxOut[0] as spent
po := wire.NewOutPoint(dupsha, 0)
txI := wire.NewTxIn(po, []byte("garbage"))
var spendtx wire.MsgTx
spendtx.AddTxIn(txI)
err = db.doSpend(&spendtx)
if err != nil {
log.Warnf("block %v idx %v failed to spend tx %v %v err %v", blocksha, newheight, &txsha, txidx, err)
}
}
}
err = db.doSpend(tx)
if err != nil {
log.Warnf("block %v idx %v failed to spend tx %v %v err %v", blocksha, newheight, txsha, txidx, err)
return 0, err
}
}
return newheight, nil
}