233 lines
5.3 KiB
Go
233 lines
5.3 KiB
Go
package bch
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import (
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"blockbook/bchain"
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"blockbook/bchain/coins/btc"
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"fmt"
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"strings"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcutil"
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"github.com/cpacia/bchutil"
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)
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type AddressFormat = uint8
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const (
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Legacy AddressFormat = iota
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CashAddr
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)
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var prefixes = []string{"bitcoincash", "bchtest", "bchreg"}
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// BCashParser handle
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type BCashParser struct {
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*btc.BitcoinParser
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AddressFormat AddressFormat
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}
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// NewBCashParser returns new BCashParser instance
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func NewBCashParser(params *chaincfg.Params, c *btc.Configuration) *BCashParser {
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var format AddressFormat
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switch c.AddressFormat {
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case "":
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fallthrough
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case "cashaddr":
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format = CashAddr
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case "legacy":
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format = Legacy
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default:
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// XXX
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e := fmt.Errorf("Unknown address format: %s", c.AddressFormat)
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panic(e)
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}
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return &BCashParser{
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BitcoinParser: &btc.BitcoinParser{
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BaseParser: &bchain.BaseParser{
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AddressFactory: func(addr string) (bchain.Address, error) { return newBCashAddress(addr, params, format) },
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BlockAddressesToKeep: c.BlockAddressesToKeep,
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},
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Params: params,
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},
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AddressFormat: format,
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}
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}
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// GetChainParams contains network parameters for the main Bitcoin Cash network,
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// the regression test Bitcoin Cash network, the test Bitcoin Cash network and
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// the simulation test Bitcoin Cash network, in this order
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func GetChainParams(chain string) *chaincfg.Params {
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var params *chaincfg.Params
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switch chain {
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case "test":
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params = &chaincfg.TestNet3Params
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params.Net = bchutil.TestnetMagic
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case "regtest":
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params = &chaincfg.RegressionNetParams
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params.Net = bchutil.Regtestmagic
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default:
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params = &chaincfg.MainNetParams
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params.Net = bchutil.MainnetMagic
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}
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return params
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}
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// GetAddrIDFromAddress returns internal address representation of given address
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func (p *BCashParser) GetAddrIDFromAddress(address string) ([]byte, error) {
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return p.AddressToOutputScript(address)
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}
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// AddressToOutputScript converts bitcoin address to ScriptPubKey
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func (p *BCashParser) AddressToOutputScript(address string) ([]byte, error) {
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if isCashAddr(address) {
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da, err := bchutil.DecodeAddress(address, p.Params)
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if err != nil {
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return nil, err
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}
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script, err := bchutil.PayToAddrScript(da)
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if err != nil {
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return nil, err
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}
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return script, nil
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} else {
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da, err := btcutil.DecodeAddress(address, p.Params)
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if err != nil {
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return nil, err
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}
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script, err := txscript.PayToAddrScript(da)
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if err != nil {
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return nil, err
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}
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return script, nil
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}
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}
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func isCashAddr(addr string) bool {
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slice := strings.Split(addr, ":")
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if len(slice) != 2 {
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return false
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}
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for _, prefix := range prefixes {
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if slice[0] == prefix {
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return true
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}
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}
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return false
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}
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func (p *BCashParser) UnpackTx(buf []byte) (tx *bchain.Tx, height uint32, err error) {
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tx, height, err = p.BitcoinParser.UnpackTx(buf)
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if err != nil {
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return
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}
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for i, vout := range tx.Vout {
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if len(vout.ScriptPubKey.Addresses) == 1 {
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a, err := newBCashAddress(vout.ScriptPubKey.Addresses[0], p.Params, p.AddressFormat)
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if err != nil {
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return nil, 0, err
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}
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tx.Vout[i].Address = a
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}
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}
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return
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}
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type bcashAddress struct {
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addr btcutil.Address
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net *chaincfg.Params
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format AddressFormat
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}
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func newBCashAddress(addr string, net *chaincfg.Params, format AddressFormat) (*bcashAddress, error) {
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var (
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da btcutil.Address
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err error
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)
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if isCashAddr(addr) {
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// for cashaddr we need to convert it to the legacy form (i.e. to btcutil's Address)
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// because bchutil doesn't allow later conversions
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da, err = bchutil.DecodeAddress(addr, net)
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if err != nil {
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return nil, err
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}
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switch ca := da.(type) {
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case *bchutil.CashAddressPubKeyHash:
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da, err = btcutil.NewAddressPubKeyHash(ca.Hash160()[:], net)
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case *bchutil.CashAddressScriptHash:
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da, err = btcutil.NewAddressScriptHash(ca.Hash160()[:], net)
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default:
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err = fmt.Errorf("Unknown address type: %T", da)
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}
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if err != nil {
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return nil, err
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}
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} else {
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da, err = btcutil.DecodeAddress(addr, net)
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if err != nil {
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return nil, err
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}
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}
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switch format {
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case Legacy, CashAddr:
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default:
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return nil, fmt.Errorf("Unknown address format: %d", format)
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}
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return &bcashAddress{addr: da, net: net, format: format}, nil
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}
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func (a *bcashAddress) String() string {
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return a.addr.String()
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}
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func (a *bcashAddress) EncodeAddress() (string, error) {
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switch a.format {
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case Legacy:
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return a.String(), nil
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case CashAddr:
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var (
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ca btcutil.Address
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err error
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)
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switch da := a.addr.(type) {
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case *btcutil.AddressPubKeyHash:
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ca, err = bchutil.NewCashAddressPubKeyHash(da.Hash160()[:], a.net)
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case *btcutil.AddressScriptHash:
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ca, err = bchutil.NewCashAddressScriptHash(da.Hash160()[:], a.net)
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default:
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err = fmt.Errorf("Unknown address type: %T", da)
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}
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if err != nil {
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return "", err
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}
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return ca.String(), nil
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default:
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return "", fmt.Errorf("Unknown address format: %d", a.format)
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}
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}
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func (a *bcashAddress) AreEqual(addr string) (bool, error) {
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ea, err := a.EncodeAddress()
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if err != nil {
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return false, err
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}
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return ea == addr, nil
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}
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func (a *bcashAddress) InSlice(addrs []string) (bool, error) {
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ea, err := a.EncodeAddress()
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if err != nil {
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return false, err
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}
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for _, addr := range addrs {
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if ea == addr {
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return true, nil
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}
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}
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return false, nil
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}
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