github.com/trezor/blockbook@v0.4.1-0.20240328132726-e9a08582ee2c/bchain/coins/qtum/qtumparser.go (about)

     1  package qtum
     2  
     3  import (
     4  	"bytes"
     5  	"encoding/json"
     6  	"io"
     7  
     8  	"github.com/martinboehm/btcd/wire"
     9  	"github.com/martinboehm/btcutil/chaincfg"
    10  	"github.com/trezor/blockbook/bchain"
    11  	"github.com/trezor/blockbook/bchain/coins/btc"
    12  	"github.com/trezor/blockbook/bchain/coins/utils"
    13  )
    14  
    15  // magic numbers
    16  const (
    17  	MainnetMagic wire.BitcoinNet = 0xf1cfa6d3
    18  	TestnetMagic wire.BitcoinNet = 0x0d221506
    19  )
    20  
    21  // chain parameters
    22  var (
    23  	MainNetParams chaincfg.Params
    24  	TestNetParams chaincfg.Params
    25  )
    26  
    27  func init() {
    28  	MainNetParams = chaincfg.MainNetParams
    29  	MainNetParams.Net = MainnetMagic
    30  	MainNetParams.PubKeyHashAddrID = []byte{58}
    31  	MainNetParams.ScriptHashAddrID = []byte{50}
    32  	MainNetParams.Bech32HRPSegwit = "qc"
    33  
    34  	TestNetParams = chaincfg.TestNet3Params
    35  	TestNetParams.Net = TestnetMagic
    36  	TestNetParams.PubKeyHashAddrID = []byte{120}
    37  	TestNetParams.ScriptHashAddrID = []byte{110}
    38  	TestNetParams.Bech32HRPSegwit = "tq"
    39  }
    40  
    41  // QtumParser handle
    42  type QtumParser struct {
    43  	*btc.BitcoinParser
    44  }
    45  
    46  // NewQtumParser returns new DashParser instance
    47  func NewQtumParser(params *chaincfg.Params, c *btc.Configuration) *QtumParser {
    48  	p := &QtumParser{
    49  		BitcoinParser: btc.NewBitcoinParser(params, c),
    50  	}
    51  	p.VSizeSupport = false
    52  	return p
    53  }
    54  
    55  // GetChainParams contains network parameters for the main Qtum network,
    56  // the regression test Qtum network, the test Qtum network and
    57  // the simulation test Qtum network, in this order
    58  func GetChainParams(chain string) *chaincfg.Params {
    59  	if !chaincfg.IsRegistered(&MainNetParams) {
    60  		err := chaincfg.Register(&MainNetParams)
    61  		if err == nil {
    62  			err = chaincfg.Register(&TestNetParams)
    63  		}
    64  		if err != nil {
    65  			panic(err)
    66  		}
    67  	}
    68  	switch chain {
    69  	case "test":
    70  		return &TestNetParams
    71  	default:
    72  		return &MainNetParams
    73  	}
    74  }
    75  
    76  func parseBlockHeader(r io.Reader) (*wire.BlockHeader, error) {
    77  	h := &wire.BlockHeader{}
    78  	err := h.Deserialize(r)
    79  	if err != nil {
    80  		return nil, err
    81  	}
    82  
    83  	// hash_state_root 32
    84  	// hash_utxo_root 32
    85  	// hash_prevout_stake 32
    86  	// hash_prevout_n 4
    87  	buf := make([]byte, 100)
    88  	_, err = io.ReadFull(r, buf)
    89  	if err != nil {
    90  		return nil, err
    91  	}
    92  
    93  	sigLength, err := wire.ReadVarInt(r, 0)
    94  	if err != nil {
    95  		return nil, err
    96  	}
    97  	sigBuf := make([]byte, sigLength)
    98  	_, err = io.ReadFull(r, sigBuf)
    99  	if err != nil {
   100  		return nil, err
   101  	}
   102  
   103  	return h, err
   104  }
   105  
   106  func (p *QtumParser) ParseBlock(b []byte) (*bchain.Block, error) {
   107  	r := bytes.NewReader(b)
   108  	w := wire.MsgBlock{}
   109  
   110  	h, err := parseBlockHeader(r)
   111  	if err != nil {
   112  		return nil, err
   113  	}
   114  
   115  	err = utils.DecodeTransactions(r, 0, wire.WitnessEncoding, &w)
   116  	if err != nil {
   117  		return nil, err
   118  	}
   119  
   120  	txs := make([]bchain.Tx, len(w.Transactions))
   121  	for ti, t := range w.Transactions {
   122  		txs[ti] = p.TxFromMsgTx(t, false)
   123  	}
   124  
   125  	return &bchain.Block{
   126  		BlockHeader: bchain.BlockHeader{
   127  			Size: len(b),
   128  			Time: h.Timestamp.Unix(),
   129  		},
   130  		Txs: txs,
   131  	}, nil
   132  }
   133  
   134  // ParseTxFromJson parses JSON message containing transaction and returns Tx struct
   135  func (p *QtumParser) ParseTxFromJson(msg json.RawMessage) (*bchain.Tx, error) {
   136  	var tx bchain.Tx
   137  	err := json.Unmarshal(msg, &tx)
   138  	if err != nil {
   139  		return nil, err
   140  	}
   141  
   142  	for i := range tx.Vout {
   143  		vout := &tx.Vout[i]
   144  		// convert vout.JsonValue to big.Int and clear it, it is only temporary value used for unmarshal
   145  		vout.ValueSat, err = p.AmountToBigInt(vout.JsonValue)
   146  		if err != nil {
   147  			return nil, err
   148  		}
   149  		vout.JsonValue = ""
   150  
   151  		if vout.ScriptPubKey.Addresses == nil {
   152  			vout.ScriptPubKey.Addresses = []string{}
   153  		}
   154  	}
   155  
   156  	return &tx, nil
   157  }