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viacoinparser.go
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viacoinparser.go
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package viacoin
import (
"blockbook/bchain"
"blockbook/bchain/coins/btc"
"blockbook/bchain/coins/utils"
"bytes"
"github.com/martinboehm/btcd/wire"
"github.com/martinboehm/btcutil/chaincfg"
)
// magic numbers
const (
MainnetMagic wire.BitcoinNet = 0xcbc6680f
RegtestMagic wire.BitcoinNet = 0x377b972d
)
// chain parameters
var (
MainNetParams chaincfg.Params
RegtestParams chaincfg.Params
)
func init() {
MainNetParams = chaincfg.MainNetParams
MainNetParams.Net = MainnetMagic
// Mainnet address encoding magics
MainNetParams.PubKeyHashAddrID = []byte{71} // base58 prefix: v
MainNetParams.ScriptHashAddrID = []byte{33} // base68 prefix: E
MainNetParams.Bech32HRPSegwit = "via"
RegtestParams = chaincfg.RegressionNetParams
RegtestParams.Net = RegtestMagic
// Regtest address encoding magics
RegtestParams.PubKeyHashAddrID = []byte{111} // base58 prefix: m or n
RegtestParams.ScriptHashAddrID = []byte{196} // base58 prefix: 2
RegtestParams.Bech32HRPSegwit = "tvia"
}
// ViacoinParser handle
type ViacoinParser struct {
*btc.BitcoinParser
}
// NewViacoinParser returns new VertcoinParser instance
func NewViacoinParser(params *chaincfg.Params, c *btc.Configuration) *ViacoinParser {
return &ViacoinParser{BitcoinParser: btc.NewBitcoinParser(params, c)}
}
// GetChainParams returns network parameters
func GetChainParams(chain string) *chaincfg.Params {
if !chaincfg.IsRegistered(&MainNetParams) {
err := chaincfg.Register(&MainNetParams)
if err == nil {
err = chaincfg.Register(&RegtestParams)
}
if err != nil {
panic(err)
}
}
switch chain {
case "regtest":
return &RegtestParams
default:
return &MainNetParams
}
}
// ParseBlock parses raw block to our Block struct
// it has special handling for Auxpow blocks that cannot be parsed by standard btc wire parse
func (p *ViacoinParser) ParseBlock(b []byte) (*bchain.Block, error) {
r := bytes.NewReader(b)
w := wire.MsgBlock{}
h := wire.BlockHeader{}
err := h.Deserialize(r)
if err != nil {
return nil, err
}
if (h.Version & utils.VersionAuxpow) != 0 {
if err = utils.SkipAuxpow(r); err != nil {
return nil, err
}
}
err = utils.DecodeTransactions(r, 0, wire.WitnessEncoding, &w)
if err != nil {
return nil, err
}
txs := make([]bchain.Tx, len(w.Transactions))
for ti, t := range w.Transactions {
txs[ti] = p.TxFromMsgTx(t, false)
}
return &bchain.Block{
BlockHeader: bchain.BlockHeader{
Size: len(b),
Time: h.Timestamp.Unix(),
},
Txs: txs,
}, nil
}