93 lines
2.2 KiB
Go
93 lines
2.2 KiB
Go
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package lndc
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import (
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"encoding/hex"
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"fmt"
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"net"
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"strings"
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"github.com/btcsuite/btcd/btcec"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcutil"
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)
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// lnAddr...
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type LNAdr struct {
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lnId [16]byte // redundant because adr contains it
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PubKey *btcec.PublicKey
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Base58Addr btcutil.Address // Base58 encoded address (1XXX...)
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NetAddr *net.TCPAddr // IP address
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name string // human readable name? Not a thing yet.
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endorsement []byte // a sig confirming the name? Not implemented
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}
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// String...
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func (l *LNAdr) String() string {
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var encodedId []byte
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if l.PubKey == nil {
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encodedId = l.Base58Addr.ScriptAddress()
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} else {
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encodedId = l.PubKey.SerializeCompressed()
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}
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return fmt.Sprintf("%v@%v", encodedId, l.NetAddr)
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}
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// newLnAddr...
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func LnAddrFromString(encodedAddr string) (*LNAdr, error) {
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// The format of an lnaddr is "<pubkey or pkh>@host"
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idHost := strings.Split(encodedAddr, "@")
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if len(idHost) != 2 {
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return nil, fmt.Errorf("invalid format for lnaddr string: %v", encodedAddr)
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}
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// Attempt to resolve the IP address, this handles parsing IPv6 zones,
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// and such.
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fmt.Println("host: ", idHost[1])
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ipAddr, err := net.ResolveTCPAddr("tcp", idHost[1])
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if err != nil {
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return nil, err
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}
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addr := &LNAdr{NetAddr: ipAddr}
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idLen := len(idHost[0])
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switch {
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// Is the ID a hex-encoded compressed public key?
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case idLen > 65 && idLen < 69:
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pubkeyBytes, err := hex.DecodeString(idHost[0])
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if err != nil {
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return nil, err
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}
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addr.PubKey, err = btcec.ParsePubKey(pubkeyBytes, btcec.S256())
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if err != nil {
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return nil, err
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}
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// got pubey, populate address from pubkey
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pkh := btcutil.Hash160(addr.PubKey.SerializeCompressed())
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addr.Base58Addr, err = btcutil.NewAddressPubKeyHash(pkh,
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&chaincfg.TestNet3Params)
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if err != nil {
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return nil, err
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}
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// Is the ID a string encoded bitcoin address?
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case idLen > 33 && idLen < 37:
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addr.Base58Addr, err = btcutil.DecodeAddress(idHost[0],
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&chaincfg.TestNet3Params)
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if err != nil {
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return nil, err
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}
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default:
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return nil, fmt.Errorf("invalid address %s", idHost[0])
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}
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// Finally, populate the lnid from the address.
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copy(addr.lnId[:], addr.Base58Addr.ScriptAddress())
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return addr, nil
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}
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