// 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 *dcrutil.Block) (height int64, rerr error) {
// Be careful with this function on syncs. It contains decred changes.
// Obtain the previous block first so long as it's not the genesis block
var blockPrev *dcrutil.Block
// Decred: WARNING. This function assumes that all block insertion calls have
// dcrutil.blocks passed to them with block.blockHeight set correctly. However,
// loading the genesis block in btcd didn't do this (via block manager); pre-
// production it should be established that all calls to this function pass
// blocks with block.blockHeight set correctly.
if block.Height() != 0 {
var errBlockPrev error
blockPrev, errBlockPrev = db.FetchBlockBySha(&block.MsgBlock().Header.PrevBlock)
if errBlockPrev != nil {
blockSha := block.Sha()
log.Warnf("Failed to fetch parent block of block %v", blockSha)
return 0, errBlockPrev
}
}
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
}
_, sTxLoc, err := block.TxLoc()
if err != nil {
log.Warnf("Failed to obtain raw block sha %v, stxloc %v", blocksha, sTxLoc)
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
}
// Get data necessary to process regular tx tree of parent block if it's not
// the genesis block.
var mBlockPrev *wire.MsgBlock
var txLoc []wire.TxLoc
if blockPrev != nil {
blockShaPrev := blockPrev.Sha()
mBlockPrev = blockPrev.MsgBlock()
txLoc, _, err = blockPrev.TxLoc()
if err != nil {
log.Warnf("Failed to obtain raw block sha %v, txloc %v", blockShaPrev, txLoc)
return 0, err
}
}
// Insert the regular tx of the parent block into the tx database if the vote
// bits enable it, and if it's not the genesis block.
votebits := mblock.Header.VoteBits
if dcrutil.IsFlagSet16(votebits, dcrutil.BlockValid) && blockPrev != nil {
for txidx, tx := range mBlockPrev.Transactions {
txsha, err := blockPrev.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)
}
}
// newheight-1 instead of newheight below, as the tx is actually found
// in the parent.
//fmt.Printf("insert tx %v into db at height %v\n", txsha, newheight)
err = db.insertTx(txsha, newheight-1, uint32(txidx), 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-1, &txsha, txidx, err)
return 0, 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
}
}
}
// Insert the stake tx of the current block into the tx database.
if len(mblock.STransactions) != 0 {
for txidx, tx := range mblock.STransactions {
txsha, err := block.STxSha(txidx)
if err != nil {
log.Warnf("failed to compute stake 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, uint32(txidx), sTxLoc[txidx].TxStart, sTxLoc[txidx].TxLen, spentbuf)
if err != nil {
log.Warnf("block %v idx %v failed to insert stake tx %v %v err %v", blocksha, newheight, &txsha, txidx, err)
return 0, err
}
err = db.doSpend(tx)
if err != nil {
log.Warnf("block %v idx %v failed to spend stx %v %v err %v", blocksha, newheight, txsha, txidx, err)
return 0, err
}
}
}
return newheight, nil
}