205 lines
5.6 KiB
Go
205 lines
5.6 KiB
Go
package nuls
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import (
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"bytes"
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"encoding/binary"
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"encoding/json"
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"errors"
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vlq "github.com/bsm/go-vlq"
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"github.com/martinboehm/btcd/wire"
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"github.com/martinboehm/btcutil/base58"
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"github.com/martinboehm/btcutil/chaincfg"
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"github.com/martinboehm/btcutil/hdkeychain"
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"spacecruft.org/spacecruft/blockbook/bchain"
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"spacecruft.org/spacecruft/blockbook/bchain/coins/btc"
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)
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// magic numbers
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const (
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MainnetMagic wire.BitcoinNet = 0xbd6b0cbf
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TestnetMagic wire.BitcoinNet = 0xffcae2ce
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RegtestMagic wire.BitcoinNet = 0xdcb7c1fc
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AddressHashLength = 24
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)
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// chain parameters
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var (
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MainNetParams chaincfg.Params
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TestNetParams chaincfg.Params
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RegtestParams chaincfg.Params
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)
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func init() {
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MainNetParams = chaincfg.MainNetParams
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MainNetParams.Net = MainnetMagic
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// Address encoding magics
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MainNetParams.AddressMagicLen = 3
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// Address encoding magics
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MainNetParams.PubKeyHashAddrID = []byte{4, 35, 1} // base58 prefix: Ns
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MainNetParams.ScriptHashAddrID = []byte{4, 35, 1} // base58 prefix: Ns
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TestNetParams = chaincfg.TestNet3Params
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TestNetParams.Net = TestnetMagic
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// Address encoding magics
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TestNetParams.PubKeyHashAddrID = []byte{140} // base58 prefix: y
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TestNetParams.ScriptHashAddrID = []byte{19} // base58 prefix: 8 or 9
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RegtestParams = chaincfg.RegressionNetParams
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RegtestParams.Net = RegtestMagic
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// Address encoding magics
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RegtestParams.PubKeyHashAddrID = []byte{140} // base58 prefix: y
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RegtestParams.ScriptHashAddrID = []byte{19} // base58 prefix: 8 or 9
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}
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// NulsParser handle
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type NulsParser struct {
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*btc.BitcoinParser
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}
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// NewNulsParser returns new NulsParser instance
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func NewNulsParser(params *chaincfg.Params, c *btc.Configuration) *NulsParser {
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return &NulsParser{BitcoinParser: btc.NewBitcoinParser(params, c)}
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}
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// GetChainParams contains network parameters for the main Gincoin network,
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// the regression test Gincoin network, the test Gincoin network and
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// the simulation test Gincoin network, in this order
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func GetChainParams(chain string) *chaincfg.Params {
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if !chaincfg.IsRegistered(&MainNetParams) {
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err := chaincfg.Register(&MainNetParams)
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if err == nil {
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err = chaincfg.Register(&TestNetParams)
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}
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if err == nil {
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err = chaincfg.Register(&RegtestParams)
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}
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if err != nil {
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panic(err)
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}
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}
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switch chain {
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case "test":
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return &TestNetParams
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case "regtest":
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return &RegtestParams
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default:
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return &MainNetParams
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}
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}
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// PackedTxidLen returns length in bytes of packed txid
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func (p *NulsParser) PackedTxidLen() int {
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return 34
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}
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// GetAddrDescFromAddress returns internal address representation (descriptor) of given address
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func (p *NulsParser) GetAddrDescFromAddress(address string) (bchain.AddressDescriptor, error) {
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addressByte := base58.Decode(address)
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return bchain.AddressDescriptor(addressByte), nil
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}
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// GetAddrDescFromVout returns internal address representation (descriptor) of given transaction output
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func (p *NulsParser) GetAddrDescFromVout(output *bchain.Vout) (bchain.AddressDescriptor, error) {
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addressStr := output.ScriptPubKey.Hex
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addressByte := base58.Decode(addressStr)
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return bchain.AddressDescriptor(addressByte), nil
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}
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// GetAddressesFromAddrDesc returns addresses for given address descriptor with flag if the addresses are searchable
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func (p *NulsParser) GetAddressesFromAddrDesc(addrDesc bchain.AddressDescriptor) ([]string, bool, error) {
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var addrs []string
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if addrDesc != nil {
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addrs = append(addrs, base58.Encode(addrDesc))
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}
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return addrs, true, nil
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}
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// PackTx packs transaction to byte array
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func (p *NulsParser) PackTx(tx *bchain.Tx, height uint32, blockTime int64) ([]byte, error) {
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txBytes, error := json.Marshal(tx)
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if error != nil {
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return nil, error
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}
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buf := make([]byte, 4+vlq.MaxLen64)
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binary.BigEndian.PutUint32(buf[0:4], height)
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vlq.PutInt(buf[4:4+vlq.MaxLen64], blockTime)
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resByes := bytes.Join([][]byte{buf, txBytes}, []byte(""))
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return resByes, nil
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}
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// UnpackTx unpacks transaction from byte array
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func (p *NulsParser) UnpackTx(buf []byte) (*bchain.Tx, uint32, error) {
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height := binary.BigEndian.Uint32(buf)
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bt, _ := vlq.Int(buf[4 : 4+vlq.MaxLen64])
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tx, err := p.ParseTx(buf[4+vlq.MaxLen64:])
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if err != nil {
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return nil, 0, err
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}
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tx.Blocktime = bt
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return tx, height, nil
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}
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// ParseTx parses tx from blob
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func (p *NulsParser) ParseTx(b []byte) (*bchain.Tx, error) {
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tx := bchain.Tx{}
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err := json.Unmarshal(b, &tx)
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if err != nil {
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return nil, err
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}
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return &tx, err
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}
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// DeriveAddressDescriptorsFromTo derives address descriptors from given xpub for addresses in index range
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func (p *NulsParser) DeriveAddressDescriptorsFromTo(xpub string, change uint32, fromIndex uint32, toIndex uint32) ([]bchain.AddressDescriptor, error) {
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if toIndex <= fromIndex {
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return nil, errors.New("toIndex<=fromIndex")
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}
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extKey, err := hdkeychain.NewKeyFromString(xpub, p.Params.Base58CksumHasher)
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if err != nil {
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return nil, err
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}
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changeExtKey, err := extKey.Child(change)
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if err != nil {
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return nil, err
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}
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ad := make([]bchain.AddressDescriptor, toIndex-fromIndex)
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for index := fromIndex; index < toIndex; index++ {
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indexExtKey, err := changeExtKey.Child(index)
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if err != nil {
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return nil, err
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}
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s, err := indexExtKey.Address(p.Params)
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if err != nil && indexExtKey != nil {
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return nil, err
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}
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addHashs := make([]byte, AddressHashLength)
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copy(addHashs[0:3], p.Params.PubKeyHashAddrID)
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copy(addHashs[3:], s.ScriptAddress())
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copy(addHashs[23:], []byte{p.xor(addHashs[0:23])})
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//addressStr := base58.Encode(addHashs)
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ad[index-fromIndex] = addHashs
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}
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return ad, nil
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}
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func (p *NulsParser) xor(body []byte) byte {
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var xor byte = 0x00
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for i := 0; i < len(body); i++ {
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xor ^= body[i]
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}
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return xor
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}
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