616 lines
20 KiB
Go
616 lines
20 KiB
Go
package lnwallet
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/Roasbeef/btcd/rpctest"
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"github.com/btcsuite/btcd/btcec"
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"github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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"github.com/btcsuite/btcutil/coinset"
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"github.com/btcsuite/btcwallet/waddrmgr"
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)
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var (
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privPass = []byte("private-test")
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// For simplicity a single priv key controls all of our test outputs.
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testWalletPrivKey = []byte{
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0x2b, 0xd8, 0x06, 0xc9, 0x7f, 0x0e, 0x00, 0xaf,
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0x1a, 0x1f, 0xc3, 0x32, 0x8f, 0xa7, 0x63, 0xa9,
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0x26, 0x97, 0x23, 0xc8, 0xdb, 0x8f, 0xac, 0x4f,
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0x93, 0xaf, 0x71, 0xdb, 0x18, 0x6d, 0x6e, 0x90,
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}
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// We're alice :)
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bobsPrivKey = []byte{
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0x81, 0xb6, 0x37, 0xd8, 0xfc, 0xd2, 0xc6, 0xda,
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0x63, 0x59, 0xe6, 0x96, 0x31, 0x13, 0xa1, 0x17,
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0xd, 0xe7, 0x95, 0xe4, 0xb7, 0x25, 0xb8, 0x4d,
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0x1e, 0xb, 0x4c, 0xfd, 0x9e, 0xc5, 0x8c, 0xe9,
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}
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// Use a hard-coded HD seed.
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testHdSeed = [32]byte{
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0xb7, 0x94, 0x38, 0x5f, 0x2d, 0x1e, 0xf7, 0xab,
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0x4d, 0x92, 0x73, 0xd1, 0x90, 0x63, 0x81, 0xb4,
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0x4f, 0x2f, 0x6f, 0x25, 0x88, 0xa3, 0xef, 0xb9,
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0x6a, 0x49, 0x18, 0x83, 0x31, 0x98, 0x47, 0x53,
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}
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zeroHash = bytes.Repeat([]byte{0}, 32)
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)
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// assertProperBalance asserts than the total value of the unspent outputs
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// within the wallet are *exactly* amount. If unable to retrieve the current
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// balance, or the assertion fails, the test will halt with a fatal error.
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func assertProperBalance(t *testing.T, lw *LightningWallet, numConfirms, amount int32) {
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balance, err := lw.CalculateBalance(1)
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if err != nil {
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t.Fatalf("unable to query for balance: %v", err)
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}
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if balance != btcutil.Amount(amount*1e8) {
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t.Fatalf("wallet credits not properly loaded, should have 20BTC, "+
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"instead have %v", balance)
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}
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}
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// bobNode represents the other party involved as a node within LN. Bob is our
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// only "default-route", we have a direct connection with him.
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type bobNode struct {
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privKey *btcec.PrivateKey
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// For simplicity, used for both the commit tx and the multi-sig output.
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channelKey *btcec.PublicKey
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deliveryAddress btcutil.Address
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revocation [20]byte
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delay uint32
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id [wire.HashSize]byte
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availableOutputs []*wire.TxIn
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changeOutputs []*wire.TxOut
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}
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// Contribution returns bobNode's contribution necessary to open a payment
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// channel with Alice.
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func (b *bobNode) Contribution() *ChannelContribution {
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return &ChannelContribution{
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Inputs: b.availableOutputs,
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ChangeOutputs: b.changeOutputs,
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MultiSigKey: b.channelKey,
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CommitKey: b.channelKey,
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DeliveryAddress: b.deliveryAddress,
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RevocationHash: b.revocation,
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CsvDelay: b.delay,
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}
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}
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// signFundingTx generates signatures for all the inputs in the funding tx
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// belonging to Bob.
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// NOTE: This generates the full sig-script.
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func (b *bobNode) signFundingTx(fundingTx *wire.MsgTx) ([][]byte, error) {
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bobSigs := make([][]byte, 0, len(b.availableOutputs))
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bobPkScript := b.changeOutputs[0].PkScript
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for i, _ := range fundingTx.TxIn {
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// Alice has already signed this input
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if fundingTx.TxIn[i].SignatureScript != nil {
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continue
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}
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sigScript, err := txscript.SignatureScript(fundingTx, i,
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bobPkScript, txscript.SigHashAll, b.privKey,
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true)
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if err != nil {
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return nil, err
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}
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bobSigs = append(bobSigs, sigScript)
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}
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return bobSigs, nil
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}
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// signCommitTx generates a raw signature required for generating a spend from
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// the funding transaction.
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func (b *bobNode) signCommitTx(commitTx *wire.MsgTx, fundingScript []byte) ([]byte, error) {
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return txscript.RawTxInSignature(commitTx, 0, fundingScript,
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txscript.SigHashAll, b.privKey)
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}
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// newBobNode generates a test "ln node" to interact with Alice (us). For the
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// funding transaction, bob has a single output totaling 7BTC. For our basic
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// test, he'll fund the channel with 5BTC, leaving 2BTC to the change output.
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// TODO(roasbeef): proper handling of change etc.
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func newBobNode(miner *rpctest.Harness) (*bobNode, error) {
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// First, parse Bob's priv key in order to obtain a key he'll use for the
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// multi-sig funding transaction.
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privKey, pubKey := btcec.PrivKeyFromBytes(btcec.S256(), bobsPrivKey)
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// Next, generate an output redeemable by bob.
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bobAddrPk, err := btcutil.NewAddressPubKey(privKey.PubKey().SerializeCompressed(),
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miner.ActiveNet)
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if err != nil {
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return nil, err
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}
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bobAddr := bobAddrPk.AddressPubKeyHash()
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bobAddrScript, err := txscript.PayToAddrScript(bobAddr)
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if err != nil {
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return nil, err
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}
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// Give bobNode one 7 BTC output for use in creating channels.
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output := &wire.TxOut{7e8, bobAddrScript}
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mainTxid, err := miner.CoinbaseSpend([]*wire.TxOut{output})
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if err != nil {
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return nil, err
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}
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// Mine a block in order to include the above output in a block. During
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// the reservation workflow, we currently test to ensure that the funding
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// output we're given actually exists.
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if _, err := miner.Node.Generate(1); err != nil {
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return nil, err
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}
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// Grab the transaction in order to locate the output index to Bob.
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tx, err := miner.Node.GetRawTransaction(mainTxid)
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if err != nil {
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return nil, err
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}
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found, index := findScriptOutputIndex(tx.MsgTx(), bobAddrScript)
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if !found {
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return nil, fmt.Errorf("output to bob never created")
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}
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prevOut := wire.NewOutPoint(mainTxid, index)
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// TODO(roasbeef): When the chain rpc is hooked in, assert bob's output
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// actually exists and it unspent in the chain.
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bobTxIn := wire.NewTxIn(prevOut, nil, nil)
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// Using bobs priv key above, create a change output he can spend.
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bobChangeOutput := wire.NewTxOut(2*1e8, bobAddrScript)
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// Bob's initial revocation hash is just his private key with the first
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// byte changed...
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var revocation [20]byte
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copy(revocation[:], bobsPrivKey)
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revocation[0] = 0xff
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// His ID is just as creative...
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var id [wire.HashSize]byte
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id[0] = 0xff
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return &bobNode{
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id: id,
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privKey: privKey,
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channelKey: pubKey,
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deliveryAddress: bobAddr,
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revocation: revocation,
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delay: 5,
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availableOutputs: []*wire.TxIn{bobTxIn},
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changeOutputs: []*wire.TxOut{bobChangeOutput},
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}, nil
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}
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func loadTestCredits(miner *rpctest.Harness, w *LightningWallet, numOutputs, btcPerOutput int) error {
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// Using the mining node, spend from a coinbase output numOutputs to
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// give us btcPerOutput with each output.
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satoshiPerOutput := int64(btcPerOutput * 1e8)
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addrs := make([]btcutil.Address, 0, numOutputs)
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for i := 0; i < numOutputs; i++ {
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// Grab a fresh address from the wallet to house this output.
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walletAddr, err := w.NewAddress(waddrmgr.DefaultAccountNum)
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if err != nil {
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return err
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}
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script, err := txscript.PayToAddrScript(walletAddr)
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if err != nil {
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return err
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}
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addrs = append(addrs, walletAddr)
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output := &wire.TxOut{satoshiPerOutput, script}
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if _, err := miner.CoinbaseSpend([]*wire.TxOut{output}); err != nil {
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return err
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}
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}
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// TODO(roasbeef): shouldn't hardcode 10, use config param that dictates
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// how many confs we wait before opening a channel.
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// Generate 10 blocks with the mining node, this should mine all
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// numOutputs transactions created above. We generate 10 blocks here
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// in order to give all the outputs a "sufficient" number of confirmations.
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if _, err := miner.Node.Generate(10); err != nil {
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return err
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}
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_, bestHeight, err := miner.Node.GetBestBlock()
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if err != nil {
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return err
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}
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// Wait until the wallet has finished syncing up to the main chain.
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ticker := time.NewTicker(100 * time.Millisecond)
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out:
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for {
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select {
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case <-ticker.C:
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if w.Manager.SyncedTo().Height == bestHeight {
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break out
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}
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}
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}
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ticker.Stop()
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// Trigger a re-scan to ensure the wallet knows of the newly created
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// outputs it can spend.
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if err := w.Rescan(addrs, nil); err != nil {
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return err
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}
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return nil
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}
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// createTestWallet creates a test LightningWallet will a total of 20BTC
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// available for funding channels.
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func createTestWallet(miningNode *rpctest.Harness, netParams *chaincfg.Params) (string, *LightningWallet, error) {
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privPass := []byte("private-test")
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tempTestDir, err := ioutil.TempDir("", "lnwallet")
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if err != nil {
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return "", nil, nil
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}
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rpcConfig := miningNode.RPCConfig()
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config := &Config{
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PrivatePass: privPass,
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HdSeed: testHdSeed[:],
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DataDir: tempTestDir,
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NetParams: netParams,
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RpcHost: rpcConfig.Host,
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RpcUser: rpcConfig.User,
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RpcPass: rpcConfig.Pass,
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CACert: rpcConfig.Certificates,
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}
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dbDir := filepath.Join(tempTestDir, "cdb")
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cdb, err := channeldb.Create(dbDir)
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if err != nil {
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return "", nil, err
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}
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wallet, err := NewLightningWallet(config, cdb)
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if err != nil {
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return "", nil, err
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}
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if err := wallet.Startup(); err != nil {
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return "", nil, err
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}
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cdb.RegisterCryptoSystem(&WaddrmgrEncryptorDecryptor{wallet.Manager})
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// Load our test wallet with 5 outputs each holding 4BTC.
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if err := loadTestCredits(miningNode, wallet, 5, 4); err != nil {
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return "", nil, err
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}
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return tempTestDir, wallet, nil
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}
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func testBasicWalletReservationWorkFlow(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
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// Create our test wallet, will have a total of 20 BTC available for
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bobNode, err := newBobNode(miner)
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if err != nil {
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t.Fatalf("unable to create bob node: %v", err)
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}
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// Bob initiates a channel funded with 5 BTC for each side, so 10
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// BTC total. He also generates 2 BTC in change.
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fundingAmount := btcutil.Amount(5 * 1e8)
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chanReservation, err := lnwallet.InitChannelReservation(fundingAmount,
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SIGHASH, bobNode.id, 4)
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if err != nil {
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t.Fatalf("unable to initialize funding reservation: %v", err)
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}
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// The channel reservation should now be populated with a multi-sig key
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// from our HD chain, a change output with 3 BTC, and 2 outputs selected
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// of 4 BTC each. Additionally, the rest of the items needed to fufill a
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// funding contribution should also have been filled in.
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ourContribution := chanReservation.OurContribution()
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if len(ourContribution.Inputs) != 2 {
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t.Fatalf("outputs for funding tx not properly selected, have %v "+
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"outputs should have 2", len(ourContribution.Inputs))
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}
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if ourContribution.ChangeOutputs[0].Value != 3e8 {
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t.Fatalf("coin selection failed, change output should be 3e8 "+
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"satoshis, is instead %v", ourContribution.ChangeOutputs[0].Value)
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}
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if ourContribution.MultiSigKey == nil {
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t.Fatalf("alice's key for multi-sig not found")
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}
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if ourContribution.CommitKey == nil {
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t.Fatalf("alice's key for commit not found")
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}
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if ourContribution.DeliveryAddress == nil {
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t.Fatalf("alice's final delivery address not found")
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}
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if bytes.Equal(ourContribution.RevocationHash[:], zeroHash) {
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t.Fatalf("alice's revocation hash not found")
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}
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if ourContribution.CsvDelay == 0 {
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t.Fatalf("csv delay not set")
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}
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// Bob sends over his output, change addr, pub keys, initial revocation,
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// final delivery address, and his accepted csv delay for the commitmen
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// t transactions.
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if err := chanReservation.ProcessContribution(bobNode.Contribution()); err != nil {
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t.Fatalf("unable to add bob's funds to the funding tx: %v", err)
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}
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// At this point, the reservation should have our signatures, and a
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// partial funding transaction (missing bob's sigs).
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theirContribution := chanReservation.TheirContribution()
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ourFundingSigs, ourCommitSig := chanReservation.OurSignatures()
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if len(ourFundingSigs) != 2 {
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t.Fatalf("only %v of our sigs present, should have 2",
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len(ourFundingSigs))
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}
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if ourCommitSig == nil {
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t.Fatalf("commitment sig not found")
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}
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// Additionally, the funding tx should have been populated.
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if chanReservation.partialState.FundingTx == nil {
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t.Fatalf("funding transaction never created!")
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}
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// Their funds should also be filled in.
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if len(theirContribution.Inputs) != 1 {
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t.Fatalf("bob's outputs for funding tx not properly selected, have %v "+
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"outputs should have 2", len(theirContribution.Inputs))
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}
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if theirContribution.ChangeOutputs[0].Value != 2e8 {
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t.Fatalf("bob should have one change output with value 2e8"+
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"satoshis, is instead %v",
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theirContribution.ChangeOutputs[0].Value)
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}
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if theirContribution.MultiSigKey == nil {
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t.Fatalf("bob's key for multi-sig not found")
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}
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if theirContribution.CommitKey == nil {
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t.Fatalf("bob's key for commit tx not found")
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}
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if theirContribution.DeliveryAddress == nil {
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t.Fatalf("bob's final delivery address not found")
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}
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if bytes.Equal(theirContribution.RevocationHash[:], zeroHash) {
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t.Fatalf("bob's revocaiton hash not found")
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}
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// Alice responds with her output, change addr, multi-sig key and signatures.
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// Bob then responds with his signatures.
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bobsSigs, err := bobNode.signFundingTx(chanReservation.partialState.FundingTx)
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if err != nil {
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t.Fatalf("unable to sign inputs for bob: %v", err)
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}
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commitSig, err := bobNode.signCommitTx(
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chanReservation.partialState.OurCommitTx,
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chanReservation.partialState.FundingRedeemScript)
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if err != nil {
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t.Fatalf("bob is unable to sign alice's commit tx: %v", err)
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}
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if err := chanReservation.CompleteReservation(bobsSigs, commitSig); err != nil {
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t.Fatalf("unable to complete funding tx: %v", err)
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}
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// At this point, the channel can be considered "open" when the funding
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// txn hits a "comfortable" depth.
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// The resulting active channel state should have been persisted to the DB.
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fundingTx := chanReservation.FinalFundingTx()
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channel, err := lnwallet.channelDB.FetchOpenChannel(bobNode.id)
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if err != nil {
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t.Fatalf("unable to retrieve channel from DB: %v", err)
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}
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if channel.FundingTx.TxSha() != fundingTx.TxSha() {
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t.Fatalf("channel state not properly saved")
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}
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}
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func testFundingTransactionLockedOutputs(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
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// Create two channels, both asking for 8 BTC each, totalling 16
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// BTC.
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// TODO(roasbeef): tests for concurrent funding.
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// * also func for below
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fundingAmount := btcutil.Amount(8 * 1e8)
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chanReservation1, err := lnwallet.InitChannelReservation(fundingAmount,
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SIGHASH, testHdSeed, 4)
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if err != nil {
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t.Fatalf("unable to initialize funding reservation 1: %v", err)
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}
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chanReservation2, err := lnwallet.InitChannelReservation(fundingAmount,
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SIGHASH, testHdSeed, 4)
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if err != nil {
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t.Fatalf("unable to initialize funding reservation 2: %v", err)
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}
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// Neither should have any change, as all our output sizes are
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// identical (4BTC).
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ourContribution1 := chanReservation1.OurContribution()
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if len(ourContribution1.Inputs) != 2 {
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t.Fatalf("outputs for funding tx not properly selected, has %v "+
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"outputs should have 2", len(ourContribution1.Inputs))
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}
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if len(ourContribution1.ChangeOutputs) != 0 {
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t.Fatalf("funding transaction should have no change, instead has %v",
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len(ourContribution1.ChangeOutputs))
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}
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ourContribution2 := chanReservation2.OurContribution()
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if len(ourContribution2.Inputs) != 2 {
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t.Fatalf("outputs for funding tx not properly selected, have %v "+
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"outputs should have 2", len(ourContribution2.Inputs))
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}
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if len(ourContribution2.ChangeOutputs) != 0 {
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t.Fatalf("funding transaction should have no change, instead has %v",
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len(ourContribution2.ChangeOutputs))
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}
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// Now attempt to reserve funds for another channel, this time requesting
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// 5 BTC. We only have 4BTC worth of outpoints that aren't locked, so
|
|
// this should fail.
|
|
amt := btcutil.Amount(8 * 1e8)
|
|
failedReservation, err := lnwallet.InitChannelReservation(amt,
|
|
SIGHASH, testHdSeed, 4)
|
|
if err == nil {
|
|
t.Fatalf("not error returned, should fail on coin selection")
|
|
}
|
|
if err != coinset.ErrCoinsNoSelectionAvailable {
|
|
t.Fatalf("error not coinselect error: %v", err)
|
|
}
|
|
if failedReservation != nil {
|
|
t.Fatalf("reservation should be nil")
|
|
}
|
|
}
|
|
|
|
func testFundingCancellationNotEnoughFunds(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
|
|
// Create a reservation for 12 BTC.
|
|
fundingAmount := btcutil.Amount(12 * 1e8)
|
|
chanReservation, err := lnwallet.InitChannelReservation(fundingAmount,
|
|
SIGHASH, testHdSeed, 4)
|
|
if err != nil {
|
|
t.Fatalf("unable to initialize funding reservation: %v", err)
|
|
}
|
|
|
|
// There should be three locked outpoints.
|
|
lockedOutPoints := lnwallet.LockedOutpoints()
|
|
if len(lockedOutPoints) != 3 {
|
|
t.Fatalf("two outpoints should now be locked, instead %v are",
|
|
lockedOutPoints)
|
|
}
|
|
|
|
// Attempt to create another channel with 12 BTC, this should fail.
|
|
failedReservation, err := lnwallet.InitChannelReservation(fundingAmount,
|
|
SIGHASH, testHdSeed, 4)
|
|
if err != coinset.ErrCoinsNoSelectionAvailable {
|
|
t.Fatalf("coin selection succeded should have insufficient funds: %+v",
|
|
failedReservation)
|
|
}
|
|
|
|
// Now cancel that old reservation.
|
|
if err := chanReservation.Cancel(); err != nil {
|
|
t.Fatalf("unable to cancel reservation: %v", err)
|
|
}
|
|
|
|
// Those outpoints should no longer be locked.
|
|
lockedOutPoints = lnwallet.LockedOutpoints()
|
|
if len(lockedOutPoints) != 0 {
|
|
t.Fatalf("outpoints still locked")
|
|
}
|
|
|
|
// Reservation ID should now longer be tracked.
|
|
_, ok := lnwallet.fundingLimbo[chanReservation.reservationID]
|
|
if ok {
|
|
t.Fatalf("funding reservation still in map")
|
|
}
|
|
|
|
// TODO(roasbeef): create method like Balance that ignores locked
|
|
// outpoints, will let us fail early/fast instead of querying and
|
|
// attempting coin selection.
|
|
|
|
// Request to fund a new channel should now succeeed.
|
|
_, err = lnwallet.InitChannelReservation(fundingAmount,
|
|
SIGHASH, testHdSeed, 4)
|
|
if err != nil {
|
|
t.Fatalf("unable to initialize funding reservation: %v", err)
|
|
}
|
|
}
|
|
|
|
func testCancelNonExistantReservation(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
|
|
// Create our own reservation, give it some ID.
|
|
res := newChannelReservation(SIGHASH, 1000, 5000, lnwallet, 22)
|
|
|
|
// Attempt to cancel this reservation. This should fail, we know
|
|
// nothing of it.
|
|
if err := res.Cancel(); err == nil {
|
|
t.Fatalf("cancelled non-existant reservation")
|
|
}
|
|
}
|
|
|
|
func testFundingReservationInvalidCounterpartySigs(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
|
|
}
|
|
|
|
func testFundingTransactionTxFees(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
|
|
}
|
|
|
|
var walletTests = []func(miner *rpctest.Harness, w *LightningWallet, test *testing.T){
|
|
testBasicWalletReservationWorkFlow,
|
|
testFundingTransactionLockedOutputs,
|
|
testFundingCancellationNotEnoughFunds,
|
|
testFundingReservationInvalidCounterpartySigs,
|
|
testFundingTransactionLockedOutputs,
|
|
// TODO(roasbeef):
|
|
// * test for non-existant output given in funding tx
|
|
// * channel open after confirmations
|
|
// * channel update stuff
|
|
}
|
|
|
|
type testLnWallet struct {
|
|
lnwallet *LightningWallet
|
|
cleanUpFunc func()
|
|
}
|
|
|
|
func clearWalletState(w *LightningWallet) {
|
|
w.nextFundingID = 0
|
|
w.fundingLimbo = make(map[uint64]*ChannelReservation)
|
|
w.ResetLockedOutpoints()
|
|
}
|
|
|
|
func TestLightningWallet(t *testing.T) {
|
|
// TODO(roasbeef): switch to testnetL later
|
|
netParams := &chaincfg.SimNetParams
|
|
|
|
// Initialize the harness around a btcd node which will serve as our
|
|
// dedicated miner to generate blocks, cause re-orgs, etc. We'll set
|
|
// up this node with a chain length of 125, so we have plentyyy of BTC
|
|
// to play around with.
|
|
miningNode, err := rpctest.New(netParams, nil, nil)
|
|
defer miningNode.TearDown()
|
|
if err != nil {
|
|
t.Fatalf("unable to create mining node: %v", err)
|
|
}
|
|
if err := miningNode.SetUp(true, 25); err != nil {
|
|
t.Fatalf("unable to set up mining node: %v", err)
|
|
}
|
|
|
|
// Funding via 5 outputs with 4BTC each.
|
|
testDir, lnwallet, err := createTestWallet(miningNode, netParams)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test ln wallet: %v", err)
|
|
}
|
|
defer os.RemoveAll(testDir)
|
|
defer lnwallet.Shutdown()
|
|
|
|
// The wallet should now have 20BTC available for spending.
|
|
assertProperBalance(t, lnwallet, 1, 20)
|
|
|
|
// Execute every test, clearing possibly mutated wallet state after
|
|
// each step.
|
|
for _, walletTest := range walletTests {
|
|
walletTest(miningNode, lnwallet, t)
|
|
|
|
// TODO(roasbeef): possible reset mining node's chainstate to
|
|
// initial level, cleanly wipe buckets
|
|
clearWalletState(lnwallet)
|
|
}
|
|
}
|