// Download raw transaction from blockr.io
func GetTxFromBlockrIo(txid *btc.Uint256) (raw []byte) {
url := "http://btc.blockr.io/api/v1/tx/raw/" + txid.String()
r, er := http.Get(url)
if er == nil {
if r.StatusCode == 200 {
defer r.Body.Close()
c, _ := ioutil.ReadAll(r.Body)
var txx struct {
Status string
Data struct {
Tx struct {
Hex string
}
}
}
er = json.Unmarshal(c[:], &txx)
if er == nil {
raw, _ = hex.DecodeString(txx.Data.Tx.Hex)
}
} else {
fmt.Println("btc.blockr.io StatusCode=", r.StatusCode)
}
}
if er != nil {
fmt.Println("btc.blockr.io:", er.Error())
}
return
}
func (c *OneConnection) SendCmpctBlk(hash *btc.Uint256) {
crec := GetchBlockForBIP152(hash)
if crec == nil {
fmt.Println(c.ConnID, "cmpctblock not sent for", hash.String())
return
}
k0 := binary.LittleEndian.Uint64(crec.BIP152[8:16])
k1 := binary.LittleEndian.Uint64(crec.BIP152[16:24])
msg := new(bytes.Buffer)
msg.Write(crec.Data[:80])
msg.Write(crec.BIP152[:8])
btc.WriteVlen(msg, uint64(len(crec.Block.Txs)-1)) // all except coinbase
for i := 1; i < len(crec.Block.Txs); i++ {
var lsb [8]byte
var hasz *btc.Uint256
if c.Node.SendCmpctVer == 2 {
hasz = crec.Block.Txs[i].WTxID()
} else {
hasz = crec.Block.Txs[i].Hash
}
binary.LittleEndian.PutUint64(lsb[:], siphash.Hash(k0, k1, hasz.Hash[:]))
msg.Write(lsb[:6])
}
msg.Write([]byte{1}) // one preffiled tx
msg.Write([]byte{0}) // coinbase - index 0
if c.Node.SendCmpctVer == 2 {
msg.Write(crec.Block.Txs[0].Raw) // coinbase - index 0
} else {
crec.Block.Txs[0].WriteSerialized(msg) // coinbase - index 0
}
c.SendRawMsg("cmpctblock", msg.Bytes())
}
// Download raw transaction from webbtc.com
func GetTxFromWebBTC(txid *btc.Uint256) (raw []byte) {
url := "http://webbtc.com/tx/" + txid.String() + ".bin"
r, er := http.Get(url)
if er == nil && r.StatusCode == 200 {
raw, _ = ioutil.ReadAll(r.Body)
r.Body.Close()
}
return
}
// Download raw transaction from webbtc.com
func GetTxFromWebBTC(txid *btc.Uint256) (raw []byte) {
url := "https://webbtc.com/tx/" + txid.String() + ".bin"
r, er := http.Get(url)
if er == nil {
if r.StatusCode == 200 {
raw, _ = ioutil.ReadAll(r.Body)
r.Body.Close()
} else {
fmt.Println("webbtc.com StatusCode=", r.StatusCode)
}
}
if er != nil {
fmt.Println("webbtc.com:", er.Error())
}
return
}
// Download (and re-assemble) raw transaction from blockexplorer.com
func GetTxFromBlockchainInfo(txid *btc.Uint256) (rawtx []byte) {
url := "https://blockchain.info/tx/" + txid.String() + "?format=hex"
r, er := http.Get(url)
if er == nil {
if r.StatusCode == 200 {
defer r.Body.Close()
rawhex, _ := ioutil.ReadAll(r.Body)
rawtx, er = hex.DecodeString(string(rawhex))
} else {
fmt.Println("blockchain.info StatusCode=", r.StatusCode)
}
}
if er != nil {
fmt.Println("blockexplorer.com:", er.Error())
}
return
}
// Get tx with given id from the balance folder, of from cache
func tx_from_balance(txid *btc.Uint256, error_is_fatal bool) (tx *btc.Tx) {
if tx = loadedTxs[txid.Hash]; tx != nil {
return // we have it in cache already
}
fn := "balance/" + txid.String() + ".tx"
buf, er := ioutil.ReadFile(fn)
if er == nil && buf != nil {
var th [32]byte
btc.ShaHash(buf, th[:])
if txid.Hash == th {
tx, _ = btc.NewTx(buf)
if error_is_fatal && tx == nil {
println("Transaction is corrupt:", txid.String())
cleanExit(1)
}
} else if error_is_fatal {
println("Transaction file is corrupt:", txid.String())
cleanExit(1)
}
} else if error_is_fatal {
println("Error reading transaction file:", fn)
if er != nil {
println(er.Error())
}
cleanExit(1)
}
loadedTxs[txid.Hash] = tx // store it in the cache
return
}
func GetchBlockForBIP152(hash *btc.Uint256) (crec *chain.BlckCachRec) {
crec, _, _ = common.BlockChain.Blocks.BlockGetExt(hash)
if crec == nil {
fmt.Println("BlockGetExt failed for", hash.String())
return
}
if crec.Block == nil {
crec.Block, _ = btc.NewBlock(crec.Data)
if crec.Block == nil {
fmt.Println("SendCmpctBlk: btc.NewBlock() failed for", hash.String())
return
}
}
if len(crec.Block.Txs) == 0 {
if crec.Block.BuildTxList() != nil {
fmt.Println("SendCmpctBlk: bl.BuildTxList() failed for", hash.String())
return
}
}
if len(crec.BIP152) != 24 {
crec.BIP152 = make([]byte, 24)
copy(crec.BIP152[:8], crec.Data[48:56]) // set the nonce to 8 middle-bytes of block's merkle_root
sha := sha256.New()
sha.Write(crec.Data[:80])
sha.Write(crec.BIP152[:8])
copy(crec.BIP152[8:24], sha.Sum(nil)[0:16])
}
return
}
// Download (and re-assemble) raw transaction from blockexplorer.com
func GetTxFromExplorer(txid *btc.Uint256) (rawtx []byte) {
url := "http://blockexplorer.com/api/rawtx/" + txid.String()
r, er := http.Get(url)
if er == nil {
if r.StatusCode == 200 {
defer r.Body.Close()
c, _ := ioutil.ReadAll(r.Body)
var txx struct {
Raw string `json:"rawtx"`
}
er = json.Unmarshal(c[:], &txx)
if er == nil {
rawtx, er = hex.DecodeString(txx.Raw)
}
} else {
fmt.Println("blockexplorer.com StatusCode=", r.StatusCode)
}
}
if er != nil {
fmt.Println("blockexplorer.com:", er.Error())
}
return
}
func main() {
fmt.Println("Gocoin blockchain downloader version", lib.Version)
parse_command_line()
setup_runtime_vars()
if !add_ip_str(SeedNode) {
println("You need to specify IP address of a fast seed node.")
println("For example run it like this: downloader -s 89.31.102.237")
return
}
load_ips() // other seed nodes
if len(GocoinHomeDir) > 0 && GocoinHomeDir[len(GocoinHomeDir)-1] != os.PathSeparator {
GocoinHomeDir += string(os.PathSeparator)
}
if Testnet {
GocoinHomeDir += "tstnet" + string(os.PathSeparator)
Magic = [4]byte{0x0B, 0x11, 0x09, 0x07}
DefaultTcpPort = 18333
GenesisBlock = btc.NewUint256FromString("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943")
fmt.Println("Using testnet3")
} else {
GocoinHomeDir += "btcnet" + string(os.PathSeparator)
}
fmt.Println("GocoinHomeDir:", GocoinHomeDir)
sys.LockDatabaseDir(GocoinHomeDir)
defer sys.UnlockDatabaseDir()
StartTime = time.Now()
if open_blockchain() {
fmt.Printf("Blockchain opening aborted\n")
close_blockchain()
return
}
fmt.Println("Blockchain open in", time.Now().Sub(StartTime))
go do_usif()
fmt.Println("Downloading headers from the seed peer", SeedNode)
download_headers()
if GlobalExit {
close_blockchain()
return
}
if DoThePings {
fmt.Println("Tuning to other peers and trying to find the fastest ones.")
fmt.Println("Execute command 'g' to continue to block chain download.")
fmt.Println("Otherwise it will auto-continue after 15 minutes.")
usif_prompt()
do_pings()
fmt.Println("Pings done.")
usif_prompt()
}
var HighestTrustedBlock *btc.Uint256
if LastTrustedBlock == "all" {
HighestTrustedBlock = TheBlockChain.BlockTreeEnd.BlockHash
fmt.Println("Assume all blocks trusted")
} else if LastTrustedBlock == "auto" {
if LastBlockHeight > 6 {
ha := BlocksToGet[LastBlockHeight]
HighestTrustedBlock = btc.NewUint256(ha[:])
fmt.Println("Assume last trusted block as", HighestTrustedBlock.String())
} else {
fmt.Println("-t=auto ignored since LastBlockHeight is only", LastBlockHeight)
}
} else if LastTrustedBlock != "" {
HighestTrustedBlock = btc.NewUint256FromString(LastTrustedBlock)
}
if HighestTrustedBlock != nil {
for k, h := range BlocksToGet {
if bytes.Equal(h[:], HighestTrustedBlock.Hash[:]) {
TrustUpTo = k
fmt.Println("All the blocks up to", TrustUpTo, "are assumed trusted")
break
}
}
} else {
fmt.Println("None of the blocks is to be assumed trusted (it will be very slow).")
}
for n := TheBlockChain.BlockTreeEnd; n != nil && n.Height > TheBlockChain.BlockTreeEnd.Height-BSLEN; n = n.Parent {
blocksize_update(int(n.BlockSize))
}
fmt.Println("Downloading blocks - BlocksToGet:", len(BlocksToGet), " avg_size:", avg_block_size())
usif_prompt()
StartTime = time.Now()
get_blocks()
fmt.Println("Up to block", TheBlockChain.BlockTreeEnd.Height, "in", time.Now().Sub(StartTime).String())
close_all_connections()
close_blockchain()
return
}
func main() {
fmt.Println("Gocoin blockchain downloader version", lib.Version)
parse_command_line()
setup_runtime_vars()
if len(GocoinHomeDir) > 0 && GocoinHomeDir[len(GocoinHomeDir)-1] != os.PathSeparator {
GocoinHomeDir += string(os.PathSeparator)
}
if Testnet {
GocoinHomeDir += "tstnet" + string(os.PathSeparator)
Magic = [4]byte{0x0B, 0x11, 0x09, 0x07}
GenesisBlock = btc.NewUint256FromString("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943")
fmt.Println("Using testnet3")
} else {
GocoinHomeDir += "btcnet" + string(os.PathSeparator)
}
fmt.Println("GocoinHomeDir:", GocoinHomeDir)
sys.LockDatabaseDir(GocoinHomeDir)
defer sys.UnlockDatabaseDir()
peersdb.Testnet = Testnet
peersdb.InitPeers(GocoinHomeDir)
StartTime = time.Now()
if open_blockchain() {
fmt.Printf("Blockchain opening aborted\n")
return
}
fmt.Println("Blockchain open in", time.Now().Sub(StartTime))
go do_usif()
download_headers()
if GlobalExit() {
TheBlockChain.Close()
return
}
var HighestTrustedBlock *btc.Uint256
if LastTrustedBlock == "all" {
HighestTrustedBlock = TheBlockChain.BlockTreeEnd.BlockHash
fmt.Println("Assume all blocks trusted")
} else if LastTrustedBlock == "auto" {
if LastBlockHeight > 6 {
use := LastBlockHeight - 6
ha := BlocksToGet[use]
HighestTrustedBlock = btc.NewUint256(ha[:])
fmt.Println("Assume last trusted block as", HighestTrustedBlock.String(), "at", use)
} else {
fmt.Println("-t=auto ignored since LastBlockHeight is only", LastBlockHeight)
}
} else if LastTrustedBlock != "" {
HighestTrustedBlock = btc.NewUint256FromString(LastTrustedBlock)
}
if HighestTrustedBlock != nil {
for k, h := range BlocksToGet {
if bytes.Equal(h[:], HighestTrustedBlock.Hash[:]) {
TrustUpTo = k
break
}
}
} else {
fmt.Println("WARNING: The trusted block not found (it will be very slow).")
}
for n := TheBlockChain.BlockTreeEnd; n != nil && n.Height > TheBlockChain.BlockTreeEnd.Height-BSLEN; n = n.Parent {
blocksize_update(int(n.BlockSize))
}
fmt.Println("Downloading blocks - BlocksToGet:", len(BlocksToGet), " avg_size:", avg_block_size())
usif_prompt()
StartTime = time.Now()
get_blocks()
fmt.Println("Up to block", TheBlockChain.BlockTreeEnd.Height, "in", time.Now().Sub(StartTime).String())
close_all_connections()
peersdb.ClosePeerDB()
StartTime = time.Now()
fmt.Print("All blocks done - defrag unspent")
qdb.SetDefragPercent(100)
for {
if !TheBlockChain.Unspent.Idle() {
break
}
fmt.Print(".")
}
fmt.Println("\nDefrag unspent done in", time.Now().Sub(StartTime).String())
TheBlockChain.Close()
return
}
func main() {
if len(os.Args) < 2 {
fmt.Println("Specify a path to folder containig blockchain.dat and blockchain.new")
fmt.Println("Output bootstrap.dat file will be written in the current folder.")
return
}
blks := chain.NewBlockDB(os.Args[1])
if blks == nil {
return
}
fmt.Println("Loading block index...")
bidx = make(map[[32]byte]*chain.BlockTreeNode, 300e3)
blks.LoadBlockIndex(nil, walk)
var tail, nd *chain.BlockTreeNode
var genesis_block_hash *btc.Uint256
for _, v := range bidx {
if v == tail {
// skip root block (should be only one)
continue
}
par_hash := btc.NewUint256(v.BlockHeader[4:36])
par, ok := bidx[par_hash.Hash]
if !ok {
genesis_block_hash = par_hash
} else {
v.Parent = par
if tail == nil || v.Height > tail.Height {
tail = v
}
}
}
if genesis_block_hash == nil {
println("genesis_block_hash not found")
return
}
var magic []byte
gen_bin, _ := hex.DecodeString(GenesisBitcoin)
tmp := btc.NewSha2Hash(gen_bin[:80])
if genesis_block_hash.Equal(tmp) {
println("Bitcoin genesis block")
magic = []byte{0xF9, 0xBE, 0xB4, 0xD9}
}
if magic == nil {
gen_bin, _ := hex.DecodeString(GenesisTestnet)
tmp = btc.NewSha2Hash(gen_bin[:80])
if genesis_block_hash.Equal(tmp) {
println("Testnet3 genesis block")
magic = []byte{0x0B, 0x11, 0x09, 0x07}
}
}
if magic == nil {
println("Unknow genesis block", genesis_block_hash.String())
println("Aborting since cannot figure out the magic bytes")
return
}
var total_data, curr_data int64
for nd = tail; nd.Parent != nil; {
nd.Parent.Childs = []*chain.BlockTreeNode{nd}
total_data += int64(nd.BlockSize)
nd = nd.Parent
}
fmt.Println("Writting bootstrap.dat, height", tail.Height, " magic", hex.EncodeToString(magic))
f, _ := os.Create("bootstrap.dat")
f.Write(magic)
binary.Write(f, binary.LittleEndian, uint32(len(gen_bin)))
f.Write(gen_bin)
for {
bl, _, _ := blks.BlockGet(nd.BlockHash)
f.Write(magic)
binary.Write(f, binary.LittleEndian, uint32(len(bl)))
f.Write(bl)
curr_data += int64(nd.BlockSize)
if (nd.Height & 0xfff) == 0 {
fmt.Printf("\r%.1f%%...", 100*float64(curr_data)/float64(total_data))
}
if len(nd.Childs) == 0 {
break
}
nd = nd.Childs[0]
}
fmt.Println("\rDone ")
}
// Download (and re-assemble) raw transaction from blockexplorer.com
func GetTxFromExplorer(txid *btc.Uint256) ([]byte, []byte) {
url := "http://blockexplorer.com/rawtx/" + txid.String()
r, er := http.Get(url)
if er == nil && r.StatusCode == 200 {
defer r.Body.Close()
c, _ := ioutil.ReadAll(r.Body)
var txx onetx
er = json.Unmarshal(c[:], &txx)
if er == nil {
// This part looks weird, but this is how I solved seq=FFFFFFFF, if the field not present:
for i := range txx.In {
txx.In[i].Sequence = 0xffffffff
}
json.Unmarshal(c[:], &txx)
// ... end of the weird solution
tx := new(btc.Tx)
tx.Version = txx.Ver
tx.TxIn = make([]*btc.TxIn, len(txx.In))
for i := range txx.In {
tx.TxIn[i] = new(btc.TxIn)
tx.TxIn[i].Input.Hash = btc.NewUint256FromString(txx.In[i].Prev_out.Hash).Hash
tx.TxIn[i].Input.Vout = txx.In[i].Prev_out.N
if txx.In[i].Prev_out.N == 0xffffffff &&
txx.In[i].Prev_out.Hash == "0000000000000000000000000000000000000000000000000000000000000000" {
tx.TxIn[i].ScriptSig, _ = hex.DecodeString(txx.In[i].Coinbase)
} else {
tx.TxIn[i].ScriptSig, _ = btc.DecodeScript(txx.In[i].ScriptSig)
}
tx.TxIn[i].Sequence = txx.In[i].Sequence
}
tx.TxOut = make([]*btc.TxOut, len(txx.Out))
for i := range txx.Out {
am, er := btc.StringToSatoshis(txx.Out[i].Value)
if er != nil {
fmt.Println("Incorrect BTC amount", txx.Out[i].Value, er.Error())
return nil, nil
}
tx.TxOut[i] = new(btc.TxOut)
tx.TxOut[i].Value = am
tx.TxOut[i].Pk_script, _ = btc.DecodeScript(txx.Out[i].ScriptPubKey)
}
tx.Lock_time = txx.Lock_time
rawtx := tx.Serialize()
if txx.Size != uint(len(rawtx)) {
fmt.Printf("Transaction size mismatch: %d expexted, %d decoded\n", txx.Size, len(rawtx))
return nil, rawtx
}
curid := btc.NewSha2Hash(rawtx)
if !curid.Equal(txid) {
fmt.Println("The downloaded transaction does not match its ID.", txid.String())
return nil, rawtx
}
return rawtx, rawtx
} else {
fmt.Println("json.Unmarshal:", er.Error())
}
} else {
if er != nil {
fmt.Println("http.Get:", er.Error())
} else {
fmt.Println("StatusCode=", r.StatusCode)
}
}
return nil, nil
}