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common.go
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common.go
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package blockchain
import (
"bytes"
"encoding/binary"
"fmt"
"sort"
"github.com/decred/dcrd/blockchain/stake"
"github.com/decred/dcrd/chaincfg"
"github.com/decred/dcrd/chaincfg/chainhash"
"github.com/decred/dcrd/txscript"
"github.com/decred/dcrd/wire"
"github.com/decred/dcrutil"
)
// DebugBlockHeaderString dumps a verbose message containing information about
// the block header of a block.
func DebugBlockHeaderString(chainParams *chaincfg.Params, block *dcrutil.Block) string {
bh := block.MsgBlock().Header
var buffer bytes.Buffer
str := fmt.Sprintf("Version: %v\n", bh.Version)
buffer.WriteString(str)
str = fmt.Sprintf("Previous block: %v\n", bh.PrevBlock)
buffer.WriteString(str)
str = fmt.Sprintf("Merkle root (reg): %v\n", bh.MerkleRoot)
buffer.WriteString(str)
str = fmt.Sprintf("Merkle root (stk): %v\n", bh.StakeRoot)
buffer.WriteString(str)
str = fmt.Sprintf("VoteBits: %v\n", bh.VoteBits)
buffer.WriteString(str)
str = fmt.Sprintf("FinalState: %v\n", bh.FinalState)
buffer.WriteString(str)
str = fmt.Sprintf("Voters: %v\n", bh.Voters)
buffer.WriteString(str)
str = fmt.Sprintf("FreshStake: %v\n", bh.FreshStake)
buffer.WriteString(str)
str = fmt.Sprintf("Revocations: %v\n", bh.Revocations)
buffer.WriteString(str)
str = fmt.Sprintf("PoolSize: %v\n", bh.PoolSize)
buffer.WriteString(str)
str = fmt.Sprintf("Timestamp: %v\n", bh.Timestamp)
buffer.WriteString(str)
bitsBig := CompactToBig(bh.Bits)
if bitsBig.Cmp(bigZero) != 0 {
bitsBig.Div(chainParams.PowLimit, bitsBig)
}
diff := bitsBig.Int64()
str = fmt.Sprintf("Bits: %v (Difficulty: %v)\n", bh.Bits, diff)
buffer.WriteString(str)
str = fmt.Sprintf("SBits: %v (In coins: %v)\n", bh.SBits,
float64(bh.SBits)/dcrutil.AtomsPerCoin)
buffer.WriteString(str)
str = fmt.Sprintf("Nonce: %v \n", bh.Nonce)
buffer.WriteString(str)
str = fmt.Sprintf("Height: %v \n", bh.Height)
buffer.WriteString(str)
str = fmt.Sprintf("Size: %v \n", bh.Size)
buffer.WriteString(str)
return buffer.String()
}
// DebugBlockString dumps a verbose message containing information about
// the transactions of a block.
func DebugBlockString(block *dcrutil.Block) string {
if block == nil {
return "block pointer nil"
}
var buffer bytes.Buffer
hash := block.Sha()
str := fmt.Sprintf("Block Header: %v Height: %v \n",
hash, block.Height())
buffer.WriteString(str)
str = fmt.Sprintf("Block contains %v regular transactions "+
"and %v stake transactions \n",
len(block.Transactions()),
len(block.STransactions()))
buffer.WriteString(str)
str = fmt.Sprintf("List of regular transactions \n")
buffer.WriteString(str)
for i, tx := range block.Transactions() {
str = fmt.Sprintf("Index: %v, Hash: %v \n", i, tx.Sha())
buffer.WriteString(str)
}
if len(block.STransactions()) == 0 {
return buffer.String()
}
str = fmt.Sprintf("List of stake transactions \n")
buffer.WriteString(str)
for i, stx := range block.STransactions() {
txTypeStr := ""
txType := stake.DetermineTxType(stx)
switch txType {
case stake.TxTypeSStx:
txTypeStr = "SStx"
case stake.TxTypeSSGen:
txTypeStr = "SSGen"
case stake.TxTypeSSRtx:
txTypeStr = "SSRtx"
default:
txTypeStr = "Error"
}
str = fmt.Sprintf("Index: %v, Type: %v, Hash: %v \n",
i, txTypeStr, stx.Sha())
buffer.WriteString(str)
}
return buffer.String()
}
// DebugMsgTxString dumps a verbose message containing information about the
// contents of a transaction.
func DebugMsgTxString(msgTx *wire.MsgTx) string {
tx := dcrutil.NewTx(msgTx)
isSStx, _ := stake.IsSStx(tx)
isSSGen, _ := stake.IsSSGen(tx)
var sstxType []bool
var sstxPkhs [][]byte
var sstxAmts []int64
var sstxRules [][]bool
var sstxLimits [][]uint16
if isSStx {
sstxType, sstxPkhs, sstxAmts, _, sstxRules, sstxLimits =
stake.GetSStxStakeOutputInfo(tx)
}
var buffer bytes.Buffer
hash := msgTx.TxSha()
str := fmt.Sprintf("Transaction hash: %v, Version %v, Locktime: %v, "+
"Expiry %v\n\n", hash, msgTx.Version, msgTx.LockTime, msgTx.Expiry)
buffer.WriteString(str)
str = fmt.Sprintf("==INPUTS==\nNumber of inputs: %v\n\n",
len(msgTx.TxIn))
buffer.WriteString(str)
for i, input := range msgTx.TxIn {
str = fmt.Sprintf("Input number: %v\n", i)
buffer.WriteString(str)
str = fmt.Sprintf("Previous outpoint hash: %v, ",
input.PreviousOutPoint.Hash)
buffer.WriteString(str)
str = fmt.Sprintf("Previous outpoint index: %v, ",
input.PreviousOutPoint.Index)
buffer.WriteString(str)
str = fmt.Sprintf("Previous outpoint tree: %v \n",
input.PreviousOutPoint.Tree)
buffer.WriteString(str)
str = fmt.Sprintf("Sequence: %v \n",
input.Sequence)
buffer.WriteString(str)
str = fmt.Sprintf("ValueIn: %v \n",
input.ValueIn)
buffer.WriteString(str)
str = fmt.Sprintf("BlockHeight: %v \n",
input.BlockHeight)
buffer.WriteString(str)
str = fmt.Sprintf("BlockIndex: %v \n",
input.BlockIndex)
buffer.WriteString(str)
str = fmt.Sprintf("Raw signature script: %x \n", input.SignatureScript)
buffer.WriteString(str)
sigScr, _ := txscript.DisasmString(input.SignatureScript)
str = fmt.Sprintf("Disasmed signature script: %v \n\n",
sigScr)
buffer.WriteString(str)
}
str = fmt.Sprintf("==OUTPUTS==\nNumber of outputs: %v\n\n",
len(msgTx.TxOut))
buffer.WriteString(str)
for i, output := range msgTx.TxOut {
str = fmt.Sprintf("Output number: %v\n", i)
buffer.WriteString(str)
coins := float64(output.Value) / 1e8
str = fmt.Sprintf("Output amount: %v atoms or %v coins\n", output.Value,
coins)
buffer.WriteString(str)
// SStx OP_RETURNs, dump pkhs and amts committed
if isSStx && i != 0 && i%2 == 1 {
coins := float64(sstxAmts[i/2]) / 1e8
str = fmt.Sprintf("SStx commit amount: %v atoms or %v coins\n",
sstxAmts[i/2], coins)
buffer.WriteString(str)
str = fmt.Sprintf("SStx commit address: %x\n",
sstxPkhs[i/2])
buffer.WriteString(str)
str = fmt.Sprintf("SStx address type is P2SH: %v\n",
sstxType[i/2])
buffer.WriteString(str)
str = fmt.Sprintf("SStx all address types is P2SH: %v\n",
sstxType)
buffer.WriteString(str)
str = fmt.Sprintf("Voting is fee limited: %v\n",
sstxLimits[i/2][0])
buffer.WriteString(str)
if sstxRules[i/2][0] {
str = fmt.Sprintf("Voting limit imposed: %v\n",
sstxLimits[i/2][0])
buffer.WriteString(str)
}
str = fmt.Sprintf("Revoking is fee limited: %v\n",
sstxRules[i/2][1])
buffer.WriteString(str)
if sstxRules[i/2][1] {
str = fmt.Sprintf("Voting limit imposed: %v\n",
sstxLimits[i/2][1])
buffer.WriteString(str)
}
}
// SSGen block/block height OP_RETURN.
if isSSGen && i == 0 {
blkHash, blkHeight, _ := stake.GetSSGenBlockVotedOn(tx)
str = fmt.Sprintf("SSGen block hash voted on: %v, height: %v\n",
blkHash, blkHeight)
buffer.WriteString(str)
}
if isSSGen && i == 1 {
vb := stake.GetSSGenVoteBits(tx)
str = fmt.Sprintf("SSGen vote bits: %v\n", vb)
buffer.WriteString(str)
}
str = fmt.Sprintf("Raw script: %x \n", output.PkScript)
buffer.WriteString(str)
scr, _ := txscript.DisasmString(output.PkScript)
str = fmt.Sprintf("Disasmed script: %v \n\n", scr)
buffer.WriteString(str)
}
return buffer.String()
}
// DebugTicketDataString writes the contents of a ticket data struct
// as a string.
func DebugTicketDataString(td *stake.TicketData) string {
var buffer bytes.Buffer
str := fmt.Sprintf("SStxHash: %v\n", td.SStxHash)
buffer.WriteString(str)
str = fmt.Sprintf("SpendHash: %v\n", td.SpendHash)
buffer.WriteString(str)
str = fmt.Sprintf("BlockHeight: %v\n", td.BlockHeight)
buffer.WriteString(str)
str = fmt.Sprintf("Prefix: %v\n", td.Prefix)
buffer.WriteString(str)
str = fmt.Sprintf("Missed: %v\n", td.Missed)
buffer.WriteString(str)
str = fmt.Sprintf("Expired: %v\n", td.Expired)
buffer.WriteString(str)
return buffer.String()
}
// DebugTicketDBLiveString prints out the number of tickets in each
// bucket of the ticket database as a string.
func DebugTicketDBLiveString(tmdb *stake.TicketDB, chainParams *chaincfg.Params) (string, error) {
var buffer bytes.Buffer
buffer.WriteString("\n")
for i := 0; i < stake.BucketsSize; i++ {
bucketTickets, err := tmdb.DumpLiveTickets(uint8(i))
if err != nil {
return "", err
}
str := fmt.Sprintf("%v: %v\t", i, len(bucketTickets))
buffer.WriteString(str)
// Add newlines.
if (i+1)%4 == 0 {
buffer.WriteString("\n")
}
}
return buffer.String(), nil
}
// DebugTicketDBLiveBucketString returns a string containing the ticket hashes
// found in a specific bucket of the live ticket database. If the verbose flag
// is called, it dumps the contents of the ticket data as well.
func DebugTicketDBLiveBucketString(tmdb *stake.TicketDB, bucket uint8, verbose bool) (string, error) {
var buffer bytes.Buffer
str := fmt.Sprintf("Contents of live ticket bucket %v:\n", bucket)
buffer.WriteString(str)
bucketTickets, err := tmdb.DumpLiveTickets(bucket)
if err != nil {
return "", err
}
for hash, td := range bucketTickets {
str = fmt.Sprintf("%v\n", hash)
buffer.WriteString(str)
if verbose {
str = fmt.Sprintf("%v\n", DebugTicketDataString(td))
buffer.WriteString(str)
}
}
return buffer.String(), nil
}
// DebugTicketDBSpentBucketString prints the contents of the spent tickets
// database bucket indicated to a string that is returned. If the verbose
// flag is indicated, the contents of each ticket are printed as well.
func DebugTicketDBSpentBucketString(tmdb *stake.TicketDB, height int64, verbose bool) (string, error) {
var buffer bytes.Buffer
str := fmt.Sprintf("Contents of spent ticket bucket height %v:\n", height)
buffer.WriteString(str)
bucketTickets, err := tmdb.DumpSpentTickets(height)
if err != nil {
return "", err
}
for hash, td := range bucketTickets {
missedStr := ""
if td.Missed {
missedStr = "Missed"
} else {
missedStr = "Spent"
}
str = fmt.Sprintf("%v (%v)\n", hash, missedStr)
buffer.WriteString(str)
if verbose {
str = fmt.Sprintf("%v\n", DebugTicketDataString(td))
buffer.WriteString(str)
}
}
return buffer.String(), nil
}
// DebugTicketDBMissedString prints out the contents of the missed ticket
// database to a string. If verbose is indicated, the ticket data itself
// is printed along with the ticket hashes.
func DebugTicketDBMissedString(tmdb *stake.TicketDB, verbose bool) (string, error) {
var buffer bytes.Buffer
str := fmt.Sprintf("Contents of missed ticket database:\n")
buffer.WriteString(str)
bucketTickets, err := tmdb.DumpMissedTickets()
if err != nil {
return "", err
}
for hash, td := range bucketTickets {
str = fmt.Sprintf("%v\n", hash)
buffer.WriteString(str)
if verbose {
str = fmt.Sprintf("%v\n", DebugTicketDataString(td))
buffer.WriteString(str)
}
}
return buffer.String(), nil
}
// writeTicketDataToBuf writes some ticket data into a buffer as serialized
// data.
func writeTicketDataToBuf(buf *bytes.Buffer, td *stake.TicketData) {
buf.Write(td.SStxHash[:])
buf.Write(td.SpendHash[:])
// OK for our purposes.
b := make([]byte, 8)
binary.LittleEndian.PutUint64(b, uint64(td.BlockHeight))
buf.Write(b)
buf.Write([]byte{byte(td.Prefix)})
if td.Missed {
buf.Write([]byte{0x01})
} else {
buf.Write([]byte{0x00})
}
if td.Expired {
buf.Write([]byte{0x01})
} else {
buf.Write([]byte{0x00})
}
}
// DebugTxStoreData returns a string containing information about the data
// stored in the given TxStore.
func DebugTxStoreData(txs TxStore) string {
if txs == nil {
return ""
}
var buffer bytes.Buffer
for _, txd := range txs {
str := fmt.Sprintf("Hash: %v\n", txd.Hash)
buffer.WriteString(str)
str = fmt.Sprintf("Height: %v\n", txd.BlockHeight)
buffer.WriteString(str)
str = fmt.Sprintf("Tx: %v\n", txd.Tx)
buffer.WriteString(str)
str = fmt.Sprintf("Spent: %v\n", txd.Spent)
buffer.WriteString(str)
str = fmt.Sprintf("Err: %v\n\n", txd.Err)
buffer.WriteString(str)
}
return buffer.String()
}
// TicketDbThumbprint takes all the tickets in the respective ticket db,
// sorts them, hashes their contents into a list, and then hashes that list.
// The resultant hash is the thumbprint of the ticket database, and should
// be the same across all clients that are synced to the same block. Returns
// an array of hashes len 3, containing (1) live tickets (2) spent tickets
// and (3) missed tickets.
// Do NOT use on mainnet or in production. For debug use only! Make sure
// the blockchain is frozen when you call this function.
func TicketDbThumbprint(tmdb *stake.TicketDB, chainParams *chaincfg.Params) ([]*chainhash.Hash, error) {
// Container for the three master hashes to go into.
dbThumbprints := make([]*chainhash.Hash, 3, 3)
// (1) Live tickets.
allLiveTickets := stake.NewTicketDataSliceEmpty()
for i := 0; i < stake.BucketsSize; i++ {
bucketTickets, err := tmdb.DumpLiveTickets(uint8(i))
if err != nil {
return nil, err
}
for _, td := range bucketTickets {
allLiveTickets = append(allLiveTickets, td)
}
}
// Sort by the number data hash, since we already have this implemented
// and it's also unique.
sort.Sort(allLiveTickets)
// Create a buffer, dump all the data into it, and hash.
var buf bytes.Buffer
for _, td := range allLiveTickets {
writeTicketDataToBuf(&buf, td)
}
liveHash := chainhash.HashFunc(buf.Bytes())
liveThumbprint, err := chainhash.NewHash(liveHash[:])
if err != nil {
return nil, err
}
dbThumbprints[0] = liveThumbprint
// (2) Spent tickets.
height := tmdb.GetTopBlock()
allSpentTickets := stake.NewTicketDataSliceEmpty()
for i := int64(chainParams.StakeEnabledHeight); i <= height; i++ {
bucketTickets, err := tmdb.DumpSpentTickets(i)
if err != nil {
return nil, err
}
for _, td := range bucketTickets {
allSpentTickets = append(allSpentTickets, td)
}
}
sort.Sort(allSpentTickets)
buf.Reset() // Flush buffer
for _, td := range allSpentTickets {
writeTicketDataToBuf(&buf, td)
}
spentHash := chainhash.HashFunc(buf.Bytes())
spentThumbprint, err := chainhash.NewHash(spentHash[:])
if err != nil {
return nil, err
}
dbThumbprints[1] = spentThumbprint
// (3) Missed tickets.
allMissedTickets := stake.NewTicketDataSliceEmpty()
missedTickets, err := tmdb.DumpMissedTickets()
if err != nil {
return nil, err
}
for _, td := range missedTickets {
allMissedTickets = append(allMissedTickets, td)
}
sort.Sort(allMissedTickets)
buf.Reset() // Flush buffer
missedHash := chainhash.HashFunc(buf.Bytes())
missedThumbprint, err := chainhash.NewHash(missedHash[:])
if err != nil {
return nil, err
}
dbThumbprints[2] = missedThumbprint
return dbThumbprints, nil
}
// findWhereDoubleSpent determines where a tx was previously doublespent.
// VERY INTENSIVE BLOCKCHAIN SCANNING, USE TO DEBUG SIMULATED BLOCKCHAINS
// ONLY.
func (b *BlockChain) findWhereDoubleSpent(block *dcrutil.Block) error {
height := int64(1)
heightEnd := block.Height()
hashes, err := b.db.FetchHeightRange(height, heightEnd)
if err != nil {
return err
}
var allTxs []*dcrutil.Tx
txs := block.Transactions()[1:]
stxs := block.STransactions()
allTxs = append(txs, stxs...)
for _, hash := range hashes {
curBlock, err := b.getBlockFromHash(&hash)
if err != nil {
return err
}
log.Errorf("Cur block %v", curBlock.Height())
for _, localTx := range allTxs {
for _, localTxIn := range localTx.MsgTx().TxIn {
for _, tx := range curBlock.Transactions()[1:] {
for _, txIn := range tx.MsgTx().TxIn {
if txIn.PreviousOutPoint == localTxIn.PreviousOutPoint {
log.Errorf("Double spend of {hash: %v, idx: %v,"+
" tree: %b}, previously found in tx %v "+
"of block %v txtree regular",
txIn.PreviousOutPoint.Hash,
txIn.PreviousOutPoint.Index,
txIn.PreviousOutPoint.Tree,
tx.Sha(),
hash)
}
}
}
for _, tx := range curBlock.STransactions() {
for _, txIn := range tx.MsgTx().TxIn {
if txIn.PreviousOutPoint == localTxIn.PreviousOutPoint {
log.Errorf("Double spend of {hash: %v, idx: %v,"+
" tree: %b}, previously found in tx %v "+
"of block %v txtree stake\n",
txIn.PreviousOutPoint.Hash,
txIn.PreviousOutPoint.Index,
txIn.PreviousOutPoint.Tree,
tx.Sha(),
hash)
}
}
}
}
}
}
for _, localTx := range stxs {
for _, localTxIn := range localTx.MsgTx().TxIn {
for _, tx := range txs {
for _, txIn := range tx.MsgTx().TxIn {
if txIn.PreviousOutPoint == localTxIn.PreviousOutPoint {
log.Errorf("Double spend of {hash: %v, idx: %v,"+
" tree: %b}, previously found in tx %v "+
"of cur block stake txtree\n",
txIn.PreviousOutPoint.Hash,
txIn.PreviousOutPoint.Index,
txIn.PreviousOutPoint.Tree,
tx.Sha())
}
}
}
}
}
return nil
}