313 lines
9.4 KiB
Go
313 lines
9.4 KiB
Go
package test
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import (
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"context"
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"fmt"
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"sync/atomic"
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"testing"
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"time"
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"github.com/filecoin-project/go-state-types/abi"
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"github.com/filecoin-project/go-state-types/big"
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"github.com/ipfs/go-cid"
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"github.com/filecoin-project/go-address"
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cbor "github.com/ipfs/go-ipld-cbor"
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"github.com/filecoin-project/lotus/api"
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"github.com/filecoin-project/lotus/blockstore"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/chain/actors/adt"
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"github.com/filecoin-project/lotus/chain/actors/builtin"
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"github.com/filecoin-project/lotus/chain/actors/builtin/paych"
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"github.com/filecoin-project/lotus/chain/actors/policy"
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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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)
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func TestPaymentChannels(t *testing.T, b APIBuilder, blocktime time.Duration) {
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ctx := context.Background()
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n, sn := b(t, TwoFull, 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, types.KTSecp256k1)
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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(7000)
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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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if vouch1.Voucher == nil {
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t.Fatal(fmt.Errorf("Not enough funds to create voucher: missing %d", vouch1.Shortfall))
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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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if vouch2.Voucher == nil {
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t.Fatal(fmt.Errorf("Not enough funds to create voucher: missing %d", vouch2.Shortfall))
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}
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delta1, err := paymentReceiver.PaychVoucherAdd(ctx, channel, vouch1.Voucher, 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.Voucher, 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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creatorStore := adt.WrapStore(ctx, cbor.NewCborStore(blockstore.NewAPIBlockstore(paymentCreator)))
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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.StateGetActor(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, err := paych.Load(creatorStore, act)
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if err != nil {
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return false, false, err
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}
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toSend, err := state.ToSend()
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if err != nil {
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return false, false, err
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}
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if 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.Finality, 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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if err != nil {
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t.Fatal(err)
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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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// Create a new voucher now that some vouchers have already been submitted
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vouchRes, err := paymentCreator.PaychVoucherCreate(ctx, channel, abi.NewTokenAmount(1000), 3)
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if err != nil {
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t.Fatal(err)
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}
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if vouchRes.Voucher == nil {
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t.Fatal(fmt.Errorf("Not enough funds to create voucher: missing %d", vouchRes.Shortfall))
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}
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vdelta, err := paymentReceiver.PaychVoucherAdd(ctx, channel, vouchRes.Voucher, 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 !vdelta.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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// Create a new voucher whose value would exceed the channel balance
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excessAmt := abi.NewTokenAmount(1000)
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vouchRes, err = paymentCreator.PaychVoucherCreate(ctx, channel, excessAmt, 4)
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if err != nil {
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t.Fatal(err)
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}
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if vouchRes.Voucher != nil {
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t.Fatal("Expected not to be able to create voucher whose value would exceed channel balance")
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}
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if !vouchRes.Shortfall.Equals(excessAmt) {
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t.Fatal(fmt.Errorf("Expected voucher shortfall of %d, got %d", excessAmt, vouchRes.Shortfall))
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}
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// Add a voucher whose value would exceed the channel balance
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vouch := &paych.SignedVoucher{ChannelAddr: channel, Amount: excessAmt, Lane: 4, Nonce: 1}
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vb, err := vouch.SigningBytes()
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if err != nil {
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t.Fatal(err)
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}
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sig, err := paymentCreator.WalletSign(ctx, createrAddr, vb)
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if err != nil {
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t.Fatal(err)
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}
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vouch.Signature = sig
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_, err = paymentReceiver.PaychVoucherAdd(ctx, channel, vouch, nil, abi.NewTokenAmount(1000))
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if err == nil {
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t.Fatal(fmt.Errorf("Expected shortfall error of %d", excessAmt))
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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, policy.PaychSettleDelay)
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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, api.LookbackNoLimit, true)
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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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}, nil)
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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, api.LookbackNoLimit, true)
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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, api.LookbackNoLimit, true)
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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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