322 lines
8.7 KiB
Go
322 lines
8.7 KiB
Go
package test
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import (
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"context"
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"fmt"
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"os"
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"sync/atomic"
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"testing"
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"time"
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"github.com/filecoin-project/specs-actors/actors/builtin"
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"github.com/filecoin-project/specs-actors/actors/abi"
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"github.com/filecoin-project/specs-actors/actors/abi/big"
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"github.com/filecoin-project/specs-actors/actors/builtin/paych"
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"github.com/ipfs/go-cid"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/lotus/api"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/chain/events"
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"github.com/filecoin-project/lotus/chain/events/state"
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"github.com/filecoin-project/lotus/chain/types"
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"github.com/filecoin-project/lotus/chain/wallet"
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"github.com/filecoin-project/lotus/miner"
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)
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func TestPaymentChannels(t *testing.T, b APIBuilder, blocktime time.Duration) {
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_ = os.Setenv("BELLMAN_NO_GPU", "1")
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ctx := context.Background()
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n, sn := b(t, 2, oneMiner)
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paymentCreator := n[0]
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paymentReceiver := n[1]
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miner := sn[0]
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// get everyone connected
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addrs, err := paymentCreator.NetAddrsListen(ctx)
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if err != nil {
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t.Fatal(err)
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}
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if err := paymentReceiver.NetConnect(ctx, addrs); err != nil {
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t.Fatal(err)
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}
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if err := miner.NetConnect(ctx, addrs); err != nil {
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t.Fatal(err)
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}
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// start mining blocks
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bm := newBlockMiner(ctx, t, miner, blocktime)
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bm.mineBlocks()
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// send some funds to register the receiver
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receiverAddr, err := paymentReceiver.WalletNew(ctx, wallet.ActSigType("secp256k1"))
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if err != nil {
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t.Fatal(err)
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}
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sendFunds(ctx, t, paymentCreator, receiverAddr, abi.NewTokenAmount(1e18))
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// setup the payment channel
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createrAddr, err := paymentCreator.WalletDefaultAddress(ctx)
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if err != nil {
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t.Fatal(err)
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}
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channelAmt := int64(100000)
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channelInfo, err := paymentCreator.PaychGet(ctx, createrAddr, receiverAddr, abi.NewTokenAmount(channelAmt))
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if err != nil {
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t.Fatal(err)
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}
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channel, err := paymentCreator.PaychGetWaitReady(ctx, channelInfo.WaitSentinel)
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if err != nil {
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t.Fatal(err)
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}
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// allocate three lanes
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var lanes []uint64
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for i := 0; i < 3; i++ {
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lane, err := paymentCreator.PaychAllocateLane(ctx, channel)
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if err != nil {
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t.Fatal(err)
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}
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lanes = append(lanes, lane)
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}
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// Make two vouchers each for each lane, then save on the other side
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// Note that the voucher with a value of 2000 has a higher nonce, so it
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// supersedes the voucher with a value of 1000
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for _, lane := range lanes {
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vouch1, err := paymentCreator.PaychVoucherCreate(ctx, channel, abi.NewTokenAmount(1000), lane)
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if err != nil {
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t.Fatal(err)
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}
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vouch2, err := paymentCreator.PaychVoucherCreate(ctx, channel, abi.NewTokenAmount(2000), lane)
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if err != nil {
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t.Fatal(err)
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}
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delta1, err := paymentReceiver.PaychVoucherAdd(ctx, channel, vouch1, nil, abi.NewTokenAmount(1000))
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if err != nil {
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t.Fatal(err)
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}
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if !delta1.Equals(abi.NewTokenAmount(1000)) {
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t.Fatal("voucher didn't have the right amount")
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}
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delta2, err := paymentReceiver.PaychVoucherAdd(ctx, channel, vouch2, nil, abi.NewTokenAmount(1000))
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if err != nil {
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t.Fatal(err)
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}
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if !delta2.Equals(abi.NewTokenAmount(1000)) {
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t.Fatal("voucher didn't have the right amount")
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}
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}
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// settle the payment channel
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settleMsgCid, err := paymentCreator.PaychSettle(ctx, channel)
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if err != nil {
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t.Fatal(err)
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}
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res := waitForMessage(ctx, t, paymentCreator, settleMsgCid, time.Second*10, "settle")
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if res.Receipt.ExitCode != 0 {
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t.Fatal("Unable to settle payment channel")
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}
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// wait for the receiver to submit their vouchers
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ev := events.NewEvents(ctx, paymentCreator)
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preds := state.NewStatePredicates(paymentCreator)
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finished := make(chan struct{})
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err = ev.StateChanged(func(ts *types.TipSet) (done bool, more bool, err error) {
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act, err := paymentCreator.StateReadState(ctx, channel, ts.Key())
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if err != nil {
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return false, false, err
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}
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state := act.State.(paych.State)
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if state.ToSend.GreaterThanEqual(abi.NewTokenAmount(6000)) {
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return true, false, nil
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}
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return false, true, nil
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}, func(oldTs, newTs *types.TipSet, states events.StateChange, curH abi.ChainEpoch) (more bool, err error) {
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toSendChange := states.(*state.PayChToSendChange)
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if toSendChange.NewToSend.GreaterThanEqual(abi.NewTokenAmount(6000)) {
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close(finished)
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return false, nil
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}
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return true, nil
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}, func(ctx context.Context, ts *types.TipSet) error {
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return nil
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}, int(build.MessageConfidence)+1, build.SealRandomnessLookbackLimit, func(oldTs, newTs *types.TipSet) (bool, events.StateChange, error) {
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return preds.OnPaymentChannelActorChanged(channel, preds.OnToSendAmountChanges())(ctx, oldTs.Key(), newTs.Key())
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})
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select {
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case <-finished:
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case <-time.After(time.Second):
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t.Fatal("Timed out waiting for receiver to submit vouchers")
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}
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// wait for the settlement period to pass before collecting
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waitForBlocks(ctx, t, bm, paymentReceiver, receiverAddr, paych.SettleDelay)
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creatorPreCollectBalance, err := paymentCreator.WalletBalance(ctx, createrAddr)
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if err != nil {
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t.Fatal(err)
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}
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// collect funds (from receiver, though either party can do it)
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collectMsg, err := paymentReceiver.PaychCollect(ctx, channel)
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if err != nil {
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t.Fatal(err)
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}
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res, err = paymentReceiver.StateWaitMsg(ctx, collectMsg, 3)
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if err != nil {
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t.Fatal(err)
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}
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if res.Receipt.ExitCode != 0 {
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t.Fatal("unable to collect on payment channel")
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}
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// Finally, check the balance for the creator
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currentCreatorBalance, err := paymentCreator.WalletBalance(ctx, createrAddr)
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if err != nil {
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t.Fatal(err)
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}
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// The highest nonce voucher that the creator sent on each lane is 2000
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totalVouchers := int64(len(lanes) * 2000)
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// When receiver submits the tokens to the chain, creator should get a
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// refund on the remaining balance, which is
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// channel amount - total voucher value
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expectedRefund := channelAmt - totalVouchers
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delta := big.Sub(currentCreatorBalance, creatorPreCollectBalance)
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if !delta.Equals(abi.NewTokenAmount(expectedRefund)) {
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t.Fatalf("did not send correct funds from creator: expected %d, got %d", expectedRefund, delta)
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}
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// shut down mining
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bm.stop()
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}
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func waitForBlocks(ctx context.Context, t *testing.T, bm *blockMiner, paymentReceiver TestNode, receiverAddr address.Address, count int) {
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// We need to add null blocks in batches, if we add too many the chain can't sync
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batchSize := 60
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for i := 0; i < count; i += batchSize {
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size := batchSize
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if i > count {
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size = count - i
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}
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// Add a batch of null blocks
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atomic.StoreInt64(&bm.nulls, int64(size-1))
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// Add a real block
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m, err := paymentReceiver.MpoolPushMessage(ctx, &types.Message{
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To: builtin.BurntFundsActorAddr,
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From: receiverAddr,
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Value: types.NewInt(0),
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})
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if err != nil {
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t.Fatal(err)
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}
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_, err = paymentReceiver.StateWaitMsg(ctx, m.Cid(), 1)
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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func waitForMessage(ctx context.Context, t *testing.T, paymentCreator TestNode, msgCid cid.Cid, duration time.Duration, desc string) *api.MsgLookup {
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ctx, cancel := context.WithTimeout(ctx, duration)
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defer cancel()
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fmt.Println("Waiting for", desc)
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res, err := paymentCreator.StateWaitMsg(ctx, msgCid, 1)
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if err != nil {
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fmt.Println("Error waiting for", desc, err)
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t.Fatal(err)
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}
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if res.Receipt.ExitCode != 0 {
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t.Fatalf("did not successfully send %s", desc)
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}
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fmt.Println("Confirmed", desc)
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return res
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}
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type blockMiner struct {
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ctx context.Context
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t *testing.T
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miner TestStorageNode
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blocktime time.Duration
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mine int64
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nulls int64
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done chan struct{}
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}
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func newBlockMiner(ctx context.Context, t *testing.T, miner TestStorageNode, blocktime time.Duration) *blockMiner {
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return &blockMiner{
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ctx: ctx,
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t: t,
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miner: miner,
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blocktime: blocktime,
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mine: int64(1),
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done: make(chan struct{}),
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}
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}
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func (bm *blockMiner) mineBlocks() {
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time.Sleep(time.Second)
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go func() {
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defer close(bm.done)
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for atomic.LoadInt64(&bm.mine) == 1 {
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time.Sleep(bm.blocktime)
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nulls := atomic.SwapInt64(&bm.nulls, 0)
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if err := bm.miner.MineOne(bm.ctx, miner.MineReq{
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InjectNulls: abi.ChainEpoch(nulls),
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Done: func(bool, error) {},
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}); err != nil {
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bm.t.Error(err)
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}
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}
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}()
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}
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func (bm *blockMiner) stop() {
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atomic.AddInt64(&bm.mine, -1)
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fmt.Println("shutting down mining")
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<-bm.done
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}
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func sendFunds(ctx context.Context, t *testing.T, sender TestNode, addr address.Address, amount abi.TokenAmount) {
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senderAddr, err := sender.WalletDefaultAddress(ctx)
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if err != nil {
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t.Fatal(err)
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}
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msg := &types.Message{
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From: senderAddr,
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To: addr,
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Value: amount,
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}
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sm, err := sender.MpoolPushMessage(ctx, msg)
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if err != nil {
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t.Fatal(err)
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}
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res, err := sender.StateWaitMsg(ctx, sm.Cid(), 1)
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if err != nil {
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t.Fatal(err)
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}
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if res.Receipt.ExitCode != 0 {
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t.Fatal("did not successfully send money")
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}
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}
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