mirror of
https://github.com/lightningnetwork/lnd.git
synced 2024-11-19 18:10:34 +01:00
98c2d329e5
This commit splits out the parameters that shape the justice transaction into their own struct, which then embedded within the overarching wtpolicy.Policy which may have additional parameters describing operation of the session. This is done as a preliminary step to support comparison of sessions based on matching TxPolicy configurations. This prevents otherwise identical Policies from being counted as different if operational parameters like MaxUpdates differ, even if it has no material difference to the justice transaction.
607 lines
19 KiB
Go
607 lines
19 KiB
Go
package wtclient
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import (
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"bytes"
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"crypto/rand"
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"io"
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"reflect"
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"testing"
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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/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/davecgh/go-spew/spew"
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"github.com/lightningnetwork/lnd/input"
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"github.com/lightningnetwork/lnd/keychain"
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"github.com/lightningnetwork/lnd/lnwallet"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/lightningnetwork/lnd/watchtower/blob"
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"github.com/lightningnetwork/lnd/watchtower/wtdb"
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"github.com/lightningnetwork/lnd/watchtower/wtmock"
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"github.com/lightningnetwork/lnd/watchtower/wtpolicy"
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)
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const csvDelay uint32 = 144
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var (
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zeroPK [33]byte
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zeroSig [64]byte
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revPrivBytes = []byte{
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0x8f, 0x4b, 0x51, 0x83, 0xa9, 0x34, 0xbd, 0x5f,
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0x74, 0x6c, 0x9d, 0x5c, 0xae, 0x88, 0x2d, 0x31,
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0x06, 0x90, 0xdd, 0x8c, 0x9b, 0x31, 0xbc, 0xd1,
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0x78, 0x91, 0x88, 0x2a, 0xf9, 0x74, 0xa0, 0xef,
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}
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toLocalPrivBytes = []byte{
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0xde, 0x17, 0xc1, 0x2f, 0xdc, 0x1b, 0xc0, 0xc6,
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0x59, 0x5d, 0xf9, 0xc1, 0x3e, 0x89, 0xbc, 0x6f,
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0x01, 0x85, 0x45, 0x76, 0x26, 0xce, 0x9c, 0x55,
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0x3b, 0xc9, 0xec, 0x3d, 0xd8, 0x8b, 0xac, 0xa8,
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}
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toRemotePrivBytes = []byte{
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0x28, 0x59, 0x6f, 0x36, 0xb8, 0x9f, 0x19, 0x5d,
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0xcb, 0x07, 0x48, 0x8a, 0xe5, 0x89, 0x71, 0x74,
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0x70, 0x4c, 0xff, 0x1e, 0x9c, 0x00, 0x93, 0xbe,
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0xe2, 0x2e, 0x68, 0x08, 0x4c, 0xb4, 0x0f, 0x4f,
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}
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)
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func makeAddrSlice(size int) []byte {
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addr := make([]byte, size)
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if _, err := io.ReadFull(rand.Reader, addr); err != nil {
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panic("cannot make addr")
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}
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return addr
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}
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type backupTaskTest struct {
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name string
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chanID lnwire.ChannelID
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breachInfo *lnwallet.BreachRetribution
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expToLocalInput input.Input
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expToRemoteInput input.Input
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expTotalAmt btcutil.Amount
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expSweepAmt int64
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expRewardAmt int64
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expRewardScript []byte
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session *wtdb.ClientSessionBody
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bindErr error
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expSweepScript []byte
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signer input.Signer
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}
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// genTaskTest creates a instance of a backupTaskTest using the passed
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// parameters. This method handles generating a breach transaction and its
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// corresponding BreachInfo, as well as setting the wtpolicy.Policy of the given
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// session.
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func genTaskTest(
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name string,
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stateNum uint64,
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toLocalAmt int64,
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toRemoteAmt int64,
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blobType blob.Type,
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sweepFeeRate lnwallet.SatPerKWeight,
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rewardScript []byte,
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expSweepAmt int64,
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expRewardAmt int64,
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bindErr error) backupTaskTest {
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// Parse the key pairs for all keys used in the test.
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revSK, revPK := btcec.PrivKeyFromBytes(
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btcec.S256(), revPrivBytes,
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)
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_, toLocalPK := btcec.PrivKeyFromBytes(
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btcec.S256(), toLocalPrivBytes,
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)
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toRemoteSK, toRemotePK := btcec.PrivKeyFromBytes(
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btcec.S256(), toRemotePrivBytes,
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)
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// Create the signer, and add the revocation and to-remote privkeys.
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signer := wtmock.NewMockSigner()
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var (
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revKeyLoc = signer.AddPrivKey(revSK)
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toRemoteKeyLoc = signer.AddPrivKey(toRemoteSK)
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)
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// First, we'll initialize a new breach transaction and the
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// corresponding breach retribution. The retribution stores a pointer to
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// the breach transaction, which we will continue to modify.
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breachTxn := wire.NewMsgTx(2)
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breachInfo := &lnwallet.BreachRetribution{
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RevokedStateNum: stateNum,
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BreachTransaction: breachTxn,
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KeyRing: &lnwallet.CommitmentKeyRing{
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RevocationKey: revPK,
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DelayKey: toLocalPK,
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NoDelayKey: toRemotePK,
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},
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RemoteDelay: csvDelay,
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}
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// Add the sign descriptors and outputs corresponding to the to-local
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// and to-remote outputs, respectively, if either input amount is
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// non-zero. Note that the naming here seems reversed, but both are
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// correct. For example, the to-remote output on the remote party's
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// commitment is an output that pays to us. Hence the retribution refers
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// to that output as local, though relative to their commitment, it is
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// paying to-the-remote party (which is us).
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if toLocalAmt > 0 {
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toLocalSignDesc := &input.SignDescriptor{
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KeyDesc: keychain.KeyDescriptor{
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KeyLocator: revKeyLoc,
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PubKey: revPK,
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},
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Output: &wire.TxOut{
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Value: toLocalAmt,
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},
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HashType: txscript.SigHashAll,
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}
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breachInfo.RemoteOutputSignDesc = toLocalSignDesc
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breachTxn.AddTxOut(toLocalSignDesc.Output)
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}
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if toRemoteAmt > 0 {
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toRemoteSignDesc := &input.SignDescriptor{
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KeyDesc: keychain.KeyDescriptor{
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KeyLocator: toRemoteKeyLoc,
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PubKey: toRemotePK,
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},
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Output: &wire.TxOut{
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Value: toRemoteAmt,
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},
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HashType: txscript.SigHashAll,
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}
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breachInfo.LocalOutputSignDesc = toRemoteSignDesc
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breachTxn.AddTxOut(toRemoteSignDesc.Output)
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}
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var (
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toLocalInput input.Input
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toRemoteInput input.Input
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)
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// Now that the breach transaction has all its outputs, we can compute
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// its txid and inputs spending from it. We also generate the
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// input.Inputs that should be derived by the backup task.
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txid := breachTxn.TxHash()
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var index uint32
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if toLocalAmt > 0 {
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breachInfo.RemoteOutpoint = wire.OutPoint{
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Hash: txid,
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Index: index,
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}
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toLocalInput = input.NewBaseInput(
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&breachInfo.RemoteOutpoint,
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input.CommitmentRevoke,
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breachInfo.RemoteOutputSignDesc,
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0,
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)
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index++
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}
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if toRemoteAmt > 0 {
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breachInfo.LocalOutpoint = wire.OutPoint{
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Hash: txid,
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Index: index,
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}
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toRemoteInput = input.NewBaseInput(
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&breachInfo.LocalOutpoint,
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input.CommitmentNoDelay,
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breachInfo.LocalOutputSignDesc,
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0,
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)
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}
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return backupTaskTest{
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name: name,
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breachInfo: breachInfo,
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expToLocalInput: toLocalInput,
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expToRemoteInput: toRemoteInput,
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expTotalAmt: btcutil.Amount(toLocalAmt + toRemoteAmt),
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expSweepAmt: expSweepAmt,
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expRewardAmt: expRewardAmt,
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expRewardScript: rewardScript,
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session: &wtdb.ClientSessionBody{
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Policy: wtpolicy.Policy{
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TxPolicy: wtpolicy.TxPolicy{
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BlobType: blobType,
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SweepFeeRate: sweepFeeRate,
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RewardRate: 10000,
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},
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},
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RewardPkScript: rewardScript,
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},
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bindErr: bindErr,
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expSweepScript: makeAddrSlice(22),
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signer: signer,
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}
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}
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var (
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blobTypeCommitNoReward = blob.FlagCommitOutputs.Type()
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blobTypeCommitReward = (blob.FlagCommitOutputs | blob.FlagReward).Type()
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addr, _ = btcutil.DecodeAddress(
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"mrX9vMRYLfVy1BnZbc5gZjuyaqH3ZW2ZHz", &chaincfg.TestNet3Params,
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)
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addrScript, _ = txscript.PayToAddrScript(addr)
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)
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var backupTaskTests = []backupTaskTest{
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genTaskTest(
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"commit no-reward, both outputs",
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100, // stateNum
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200000, // toLocalAmt
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100000, // toRemoteAmt
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blobTypeCommitNoReward, // blobType
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1000, // sweepFeeRate
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nil, // rewardScript
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299241, // expSweepAmt
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0, // expRewardAmt
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nil, // bindErr
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),
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genTaskTest(
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"commit no-reward, to-local output only",
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1000, // stateNum
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200000, // toLocalAmt
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0, // toRemoteAmt
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blobTypeCommitNoReward, // blobType
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1000, // sweepFeeRate
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nil, // rewardScript
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199514, // expSweepAmt
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0, // expRewardAmt
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nil, // bindErr
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),
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genTaskTest(
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"commit no-reward, to-remote output only",
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1, // stateNum
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0, // toLocalAmt
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100000, // toRemoteAmt
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blobTypeCommitNoReward, // blobType
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1000, // sweepFeeRate
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nil, // rewardScript
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99561, // expSweepAmt
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0, // expRewardAmt
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nil, // bindErr
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),
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genTaskTest(
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"commit no-reward, to-remote output only, creates dust",
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1, // stateNum
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0, // toLocalAmt
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100000, // toRemoteAmt
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blobTypeCommitNoReward, // blobType
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227500, // sweepFeeRate
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nil, // rewardScript
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0, // expSweepAmt
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0, // expRewardAmt
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wtpolicy.ErrCreatesDust, // bindErr
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),
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genTaskTest(
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"commit no-reward, no outputs, fee rate exceeds inputs",
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300, // stateNum
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0, // toLocalAmt
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0, // toRemoteAmt
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blobTypeCommitNoReward, // blobType
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1000, // sweepFeeRate
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nil, // rewardScript
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0, // expSweepAmt
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0, // expRewardAmt
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wtpolicy.ErrFeeExceedsInputs, // bindErr
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),
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genTaskTest(
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"commit no-reward, no outputs, fee rate of 0 creates dust",
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300, // stateNum
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0, // toLocalAmt
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0, // toRemoteAmt
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blobTypeCommitNoReward, // blobType
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0, // sweepFeeRate
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nil, // rewardScript
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0, // expSweepAmt
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0, // expRewardAmt
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wtpolicy.ErrCreatesDust, // bindErr
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),
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genTaskTest(
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"commit reward, both outputs",
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100, // stateNum
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200000, // toLocalAmt
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100000, // toRemoteAmt
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blobTypeCommitReward, // blobType
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1000, // sweepFeeRate
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addrScript, // rewardScript
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296117, // expSweepAmt
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3000, // expRewardAmt
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nil, // bindErr
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),
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genTaskTest(
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"commit reward, to-local output only",
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1000, // stateNum
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200000, // toLocalAmt
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0, // toRemoteAmt
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blobTypeCommitReward, // blobType
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1000, // sweepFeeRate
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addrScript, // rewardScript
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197390, // expSweepAmt
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2000, // expRewardAmt
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nil, // bindErr
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),
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genTaskTest(
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"commit reward, to-remote output only",
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1, // stateNum
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0, // toLocalAmt
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100000, // toRemoteAmt
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blobTypeCommitReward, // blobType
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1000, // sweepFeeRate
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addrScript, // rewardScript
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98437, // expSweepAmt
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1000, // expRewardAmt
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nil, // bindErr
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),
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genTaskTest(
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"commit reward, to-remote output only, creates dust",
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1, // stateNum
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0, // toLocalAmt
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100000, // toRemoteAmt
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blobTypeCommitReward, // blobType
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175000, // sweepFeeRate
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addrScript, // rewardScript
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0, // expSweepAmt
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0, // expRewardAmt
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wtpolicy.ErrCreatesDust, // bindErr
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),
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genTaskTest(
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"commit reward, no outputs, fee rate exceeds inputs",
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300, // stateNum
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0, // toLocalAmt
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0, // toRemoteAmt
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blobTypeCommitReward, // blobType
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1000, // sweepFeeRate
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addrScript, // rewardScript
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0, // expSweepAmt
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0, // expRewardAmt
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wtpolicy.ErrFeeExceedsInputs, // bindErr
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),
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genTaskTest(
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"commit reward, no outputs, fee rate of 0 creates dust",
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300, // stateNum
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0, // toLocalAmt
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0, // toRemoteAmt
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blobTypeCommitReward, // blobType
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0, // sweepFeeRate
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addrScript, // rewardScript
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0, // expSweepAmt
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0, // expRewardAmt
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wtpolicy.ErrCreatesDust, // bindErr
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),
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}
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// TestBackupTaskBind tests the initialization and binding of a backupTask to a
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// ClientSession. After a successful bind, all parameters of the justice
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// transaction should be solidified, so we assert there correctness. In an
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// unsuccessful bind, the session-dependent parameters should be unmodified so
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// that the backup task can be rescheduled if necessary. Finally, we assert that
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// the backup task is able to encrypt a valid justice kit, and that we can
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// decrypt it using the breach txid.
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func TestBackupTask(t *testing.T) {
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t.Parallel()
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for _, test := range backupTaskTests {
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t.Run(test.name, func(t *testing.T) {
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testBackupTask(t, test)
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})
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}
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}
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func testBackupTask(t *testing.T, test backupTaskTest) {
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// Create a new backupTask from the channel id and breach info.
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task := newBackupTask(&test.chanID, test.breachInfo, test.expSweepScript)
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// Assert that all parameters set during initialization are properly
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// populated.
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if task.id.ChanID != test.chanID {
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t.Fatalf("channel id mismatch, want: %s, got: %s",
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test.chanID, task.id.ChanID)
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}
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if task.id.CommitHeight != test.breachInfo.RevokedStateNum {
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t.Fatalf("commit height mismatch, want: %d, got: %d",
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test.breachInfo.RevokedStateNum, task.id.CommitHeight)
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}
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if task.totalAmt != test.expTotalAmt {
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t.Fatalf("total amount mismatch, want: %d, got: %v",
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test.expTotalAmt, task.totalAmt)
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}
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if !reflect.DeepEqual(task.breachInfo, test.breachInfo) {
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t.Fatalf("breach info mismatch, want: %v, got: %v",
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test.breachInfo, task.breachInfo)
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}
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if !reflect.DeepEqual(task.toLocalInput, test.expToLocalInput) {
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t.Fatalf("to-local input mismatch, want: %v, got: %v",
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test.expToLocalInput, task.toLocalInput)
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}
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if !reflect.DeepEqual(task.toRemoteInput, test.expToRemoteInput) {
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t.Fatalf("to-local input mismatch, want: %v, got: %v",
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test.expToRemoteInput, task.toRemoteInput)
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}
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// Reconstruct the expected input.Inputs that will be returned by the
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// task's inputs() method.
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expInputs := make(map[wire.OutPoint]input.Input)
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if task.toLocalInput != nil {
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expInputs[*task.toLocalInput.OutPoint()] = task.toLocalInput
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}
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if task.toRemoteInput != nil {
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expInputs[*task.toRemoteInput.OutPoint()] = task.toRemoteInput
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}
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// Assert that the inputs method returns the correct slice of
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// input.Inputs.
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inputs := task.inputs()
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if !reflect.DeepEqual(expInputs, inputs) {
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t.Fatalf("inputs mismatch, want: %v, got: %v",
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expInputs, inputs)
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}
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// Now, bind the session to the task. If successful, this locks in the
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// session's negotiated parameters and allows the backup task to derive
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// the final free variables in the justice transaction.
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err := task.bindSession(test.session)
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if err != test.bindErr {
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t.Fatalf("expected: %v when binding session, got: %v",
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test.bindErr, err)
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}
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// Exit early if the bind was supposed to fail. But first, we check that
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// all fields set during a bind are still unset. This ensure that a
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// failed bind doesn't have side-effects if the task is retried with a
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// different session.
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if test.bindErr != nil {
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if task.blobType != 0 {
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t.Fatalf("blob type should not be set on failed bind, "+
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"found: %s", task.blobType)
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}
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if task.outputs != nil {
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t.Fatalf("justice outputs should not be set on failed bind, "+
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"found: %v", task.outputs)
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}
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return
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}
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// Otherwise, the binding succeeded. Assert that all values set during
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// the bind are properly populated.
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policy := test.session.Policy
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if task.blobType != policy.BlobType {
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t.Fatalf("blob type mismatch, want: %s, got %s",
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policy.BlobType, task.blobType)
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}
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// Compute the expected outputs on the justice transaction.
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var expOutputs = []*wire.TxOut{
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{
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PkScript: test.expSweepScript,
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|
Value: test.expSweepAmt,
|
|
},
|
|
}
|
|
|
|
// If the policy specifies a reward output, add it to the expected list
|
|
// of outputs.
|
|
if test.session.Policy.BlobType.Has(blob.FlagReward) {
|
|
expOutputs = append(expOutputs, &wire.TxOut{
|
|
PkScript: test.expRewardScript,
|
|
Value: test.expRewardAmt,
|
|
})
|
|
}
|
|
|
|
// Assert that the computed outputs match our expected outputs.
|
|
if !reflect.DeepEqual(expOutputs, task.outputs) {
|
|
t.Fatalf("justice txn output mismatch, want: %v,\ngot: %v",
|
|
spew.Sdump(expOutputs), spew.Sdump(task.outputs))
|
|
}
|
|
|
|
// Now, we'll construct, sign, and encrypt the blob containing the parts
|
|
// needed to reconstruct the justice transaction.
|
|
hint, encBlob, err := task.craftSessionPayload(test.signer)
|
|
if err != nil {
|
|
t.Fatalf("unable to craft session payload: %v", err)
|
|
}
|
|
|
|
// Verify that the breach hint matches the breach txid's prefix.
|
|
breachTxID := test.breachInfo.BreachTransaction.TxHash()
|
|
expHint := blob.NewBreachHintFromHash(&breachTxID)
|
|
if hint != expHint {
|
|
t.Fatalf("breach hint mismatch, want: %x, got: %v",
|
|
expHint, hint)
|
|
}
|
|
|
|
// Decrypt the return blob to obtain the JusticeKit containing its
|
|
// contents.
|
|
key := blob.NewBreachKeyFromHash(&breachTxID)
|
|
jKit, err := blob.Decrypt(key, encBlob, policy.BlobType)
|
|
if err != nil {
|
|
t.Fatalf("unable to decrypt blob: %v", err)
|
|
}
|
|
|
|
keyRing := test.breachInfo.KeyRing
|
|
expToLocalPK := keyRing.DelayKey.SerializeCompressed()
|
|
expRevPK := keyRing.RevocationKey.SerializeCompressed()
|
|
expToRemotePK := keyRing.NoDelayKey.SerializeCompressed()
|
|
|
|
// Assert that the blob contained the serialized revocation and to-local
|
|
// pubkeys.
|
|
if !bytes.Equal(jKit.RevocationPubKey[:], expRevPK) {
|
|
t.Fatalf("revocation pk mismatch, want: %x, got: %x",
|
|
expRevPK, jKit.RevocationPubKey[:])
|
|
}
|
|
if !bytes.Equal(jKit.LocalDelayPubKey[:], expToLocalPK) {
|
|
t.Fatalf("revocation pk mismatch, want: %x, got: %x",
|
|
expToLocalPK, jKit.LocalDelayPubKey[:])
|
|
}
|
|
|
|
// Determine if the breach transaction has a to-remote output and/or
|
|
// to-local output to spend from. Note the seemingly-reversed
|
|
// nomenclature.
|
|
hasToRemote := test.breachInfo.LocalOutputSignDesc != nil
|
|
hasToLocal := test.breachInfo.RemoteOutputSignDesc != nil
|
|
|
|
// If the to-remote output is present, assert that the to-remote public
|
|
// key was included in the blob.
|
|
if hasToRemote &&
|
|
!bytes.Equal(jKit.CommitToRemotePubKey[:], expToRemotePK) {
|
|
t.Fatalf("mismatch to-remote pubkey, want: %x, got: %x",
|
|
expToRemotePK, jKit.CommitToRemotePubKey)
|
|
}
|
|
|
|
// Otherwise if the to-local output is not present, assert that a blank
|
|
// public key was inserted.
|
|
if !hasToRemote &&
|
|
!bytes.Equal(jKit.CommitToRemotePubKey[:], zeroPK[:]) {
|
|
t.Fatalf("mismatch to-remote pubkey, want: %x, got: %x",
|
|
zeroPK, jKit.CommitToRemotePubKey)
|
|
}
|
|
|
|
// Assert that the CSV is encoded in the blob.
|
|
if jKit.CSVDelay != test.breachInfo.RemoteDelay {
|
|
t.Fatalf("mismatch remote delay, want: %d, got: %v",
|
|
test.breachInfo.RemoteDelay, jKit.CSVDelay)
|
|
}
|
|
|
|
// Assert that the sweep pkscript is included.
|
|
if !bytes.Equal(jKit.SweepAddress, test.expSweepScript) {
|
|
t.Fatalf("sweep pkscript mismatch, want: %x, got: %x",
|
|
test.expSweepScript, jKit.SweepAddress)
|
|
}
|
|
|
|
// Finally, verify that the signatures are encoded in the justice kit.
|
|
// We don't validate the actual signatures produced here, since at the
|
|
// moment, it is tested indirectly by other packages and integration
|
|
// tests.
|
|
// TODO(conner): include signature validation checks
|
|
|
|
emptyToLocalSig := bytes.Equal(jKit.CommitToLocalSig[:], zeroSig[:])
|
|
switch {
|
|
case hasToLocal && emptyToLocalSig:
|
|
t.Fatalf("to-local signature should not be empty")
|
|
case !hasToLocal && !emptyToLocalSig:
|
|
t.Fatalf("to-local signature should be empty")
|
|
}
|
|
|
|
emptyToRemoteSig := bytes.Equal(jKit.CommitToRemoteSig[:], zeroSig[:])
|
|
switch {
|
|
case hasToRemote && emptyToRemoteSig:
|
|
t.Fatalf("to-remote signature should not be empty")
|
|
case !hasToRemote && !emptyToRemoteSig:
|
|
t.Fatalf("to-remote signature should be empty")
|
|
}
|
|
}
|