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paych_api_test.go
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paych_api_test.go
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//stm: #integration
package itests
import (
"context"
"testing"
"time"
"github.com/filecoin-project/go-state-types/abi"
"github.com/filecoin-project/go-state-types/big"
"github.com/filecoin-project/lotus/itests/kit"
"github.com/ipfs/go-cid"
"github.com/stretchr/testify/require"
"github.com/filecoin-project/go-address"
cbor "github.com/ipfs/go-ipld-cbor"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/blockstore"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain/actors/adt"
"github.com/filecoin-project/lotus/chain/actors/builtin"
"github.com/filecoin-project/lotus/chain/actors/builtin/paych"
"github.com/filecoin-project/lotus/chain/actors/policy"
"github.com/filecoin-project/lotus/chain/events"
"github.com/filecoin-project/lotus/chain/events/state"
"github.com/filecoin-project/lotus/chain/types"
)
func TestPaymentChannelsAPI(t *testing.T) {
//stm: @CHAIN_SYNCER_LOAD_GENESIS_001, @CHAIN_SYNCER_FETCH_TIPSET_001,
//stm: @CHAIN_SYNCER_START_001, @CHAIN_SYNCER_SYNC_001, @BLOCKCHAIN_BEACON_VALIDATE_BLOCK_VALUES_01
//stm: @CHAIN_SYNCER_COLLECT_CHAIN_001, @CHAIN_SYNCER_COLLECT_HEADERS_001, @CHAIN_SYNCER_VALIDATE_TIPSET_001
//stm: @CHAIN_SYNCER_NEW_PEER_HEAD_001, @CHAIN_SYNCER_VALIDATE_MESSAGE_META_001, @CHAIN_SYNCER_STOP_001
//stm: @CHAIN_INCOMING_HANDLE_INCOMING_BLOCKS_001, @CHAIN_INCOMING_VALIDATE_BLOCK_PUBSUB_001, @CHAIN_INCOMING_VALIDATE_MESSAGE_PUBSUB_001
kit.QuietMiningLogs()
ctx := context.Background()
blockTime := 5 * time.Millisecond
var (
paymentCreator kit.TestFullNode
paymentReceiver kit.TestFullNode
miner kit.TestMiner
)
ens := kit.NewEnsemble(t, kit.MockProofs()).
FullNode(&paymentCreator).
FullNode(&paymentReceiver).
Miner(&miner, &paymentCreator, kit.WithAllSubsystems()).
Start().
InterconnectAll()
bms := ens.BeginMiningMustPost(blockTime)
bm := bms[0]
// send some funds to register the receiver
receiverAddr, err := paymentReceiver.WalletNew(ctx, types.KTSecp256k1)
require.NoError(t, err)
kit.SendFunds(ctx, t, &paymentCreator, receiverAddr, abi.NewTokenAmount(1e18))
// setup the payment channel
createrAddr, err := paymentCreator.WalletDefaultAddress(ctx)
require.NoError(t, err)
channelAmt := int64(7000)
channelInfo, err := paymentCreator.PaychGet(ctx, createrAddr, receiverAddr, abi.NewTokenAmount(channelAmt), api.PaychGetOpts{
OffChain: false,
})
require.NoError(t, err)
channel, err := paymentCreator.PaychGetWaitReady(ctx, channelInfo.WaitSentinel)
require.NoError(t, err)
// allocate three lanes
var lanes []uint64
for i := 0; i < 3; i++ {
lane, err := paymentCreator.PaychAllocateLane(ctx, channel)
require.NoError(t, err)
lanes = append(lanes, lane)
}
// Make two vouchers each for each lane, then save on the other side
// Note that the voucher with a value of 2000 has a higher nonce, so it
// supersedes the voucher with a value of 1000
for _, lane := range lanes {
vouch1, err := paymentCreator.PaychVoucherCreate(ctx, channel, abi.NewTokenAmount(1000), lane)
require.NoError(t, err)
require.NotNil(t, vouch1.Voucher, "Not enough funds to create voucher: missing %d", vouch1.Shortfall)
vouch2, err := paymentCreator.PaychVoucherCreate(ctx, channel, abi.NewTokenAmount(2000), lane)
require.NoError(t, err)
require.NotNil(t, vouch2.Voucher, "Not enough funds to create voucher: missing %d", vouch2.Shortfall)
delta1, err := paymentReceiver.PaychVoucherAdd(ctx, channel, vouch1.Voucher, nil, abi.NewTokenAmount(1000))
require.NoError(t, err)
require.EqualValues(t, abi.NewTokenAmount(1000), delta1, "voucher didn't have the right amount")
delta2, err := paymentReceiver.PaychVoucherAdd(ctx, channel, vouch2.Voucher, nil, abi.NewTokenAmount(1000))
require.NoError(t, err)
require.EqualValues(t, abi.NewTokenAmount(1000), delta2, "voucher didn't have the right amount")
}
// settle the payment channel
settleMsgCid, err := paymentCreator.PaychSettle(ctx, channel)
require.NoError(t, err)
res := waitForMessage(ctx, t, paymentCreator, settleMsgCid, time.Second*10, "settle")
require.EqualValues(t, 0, res.Receipt.ExitCode, "Unable to settle payment channel")
creatorStore := adt.WrapStore(ctx, cbor.NewCborStore(blockstore.NewAPIBlockstore(paymentCreator)))
// wait for the receiver to submit their vouchers
ev, err := events.NewEvents(ctx, paymentCreator)
require.NoError(t, err)
preds := state.NewStatePredicates(paymentCreator)
finished := make(chan struct{})
//stm: @CHAIN_STATE_GET_ACTOR_001
err = ev.StateChanged(func(ctx context.Context, ts *types.TipSet) (done bool, more bool, err error) {
act, err := paymentCreator.StateGetActor(ctx, channel, ts.Key())
if err != nil {
return false, false, err
}
state, err := paych.Load(creatorStore, act)
if err != nil {
return false, false, err
}
toSend, err := state.ToSend()
if err != nil {
return false, false, err
}
if toSend.GreaterThanEqual(abi.NewTokenAmount(6000)) {
return true, false, nil
}
return false, true, nil
}, func(oldTs, newTs *types.TipSet, states events.StateChange, curH abi.ChainEpoch) (more bool, err error) {
toSendChange := states.(*state.PayChToSendChange)
if toSendChange.NewToSend.GreaterThanEqual(abi.NewTokenAmount(6000)) {
close(finished)
return false, nil
}
return true, nil
}, func(ctx context.Context, ts *types.TipSet) error {
return nil
}, int(build.MessageConfidence)+1, build.Finality, func(oldTs, newTs *types.TipSet) (bool, events.StateChange, error) {
return preds.OnPaymentChannelActorChanged(channel, preds.OnToSendAmountChanges())(ctx, oldTs.Key(), newTs.Key())
})
require.NoError(t, err)
select {
case <-finished:
case <-time.After(10 * time.Second):
t.Fatal("Timed out waiting for receiver to submit vouchers")
}
// Create a new voucher now that some vouchers have already been submitted
vouchRes, err := paymentCreator.PaychVoucherCreate(ctx, channel, abi.NewTokenAmount(1000), 3)
require.NoError(t, err)
require.NotNil(t, vouchRes.Voucher, "Not enough funds to create voucher: missing %d", vouchRes.Shortfall)
vdelta, err := paymentReceiver.PaychVoucherAdd(ctx, channel, vouchRes.Voucher, nil, abi.NewTokenAmount(1000))
require.NoError(t, err)
require.EqualValues(t, abi.NewTokenAmount(1000), vdelta, "voucher didn't have the right amount")
// Create a new voucher whose value would exceed the channel balance
excessAmt := abi.NewTokenAmount(1000)
vouchRes, err = paymentCreator.PaychVoucherCreate(ctx, channel, excessAmt, 4)
require.NoError(t, err)
require.Nil(t, vouchRes.Voucher, "Expected not to be able to create voucher whose value would exceed channel balance")
require.EqualValues(t, excessAmt, vouchRes.Shortfall, "Expected voucher shortfall of %d, got %d", excessAmt, vouchRes.Shortfall)
// Add a voucher whose value would exceed the channel balance
vouch := &paych.SignedVoucher{ChannelAddr: channel, Amount: excessAmt, Lane: 4, Nonce: 1}
vb, err := vouch.SigningBytes()
require.NoError(t, err)
sig, err := paymentCreator.WalletSign(ctx, createrAddr, vb)
require.NoError(t, err)
vouch.Signature = sig
_, err = paymentReceiver.PaychVoucherAdd(ctx, channel, vouch, nil, abi.NewTokenAmount(1000))
require.Errorf(t, err, "Expected shortfall error of %d", excessAmt)
// wait for the settlement period to pass before collecting
waitForBlocks(ctx, t, bm, paymentReceiver, receiverAddr, policy.PaychSettleDelay)
creatorPreCollectBalance, err := paymentCreator.WalletBalance(ctx, createrAddr)
require.NoError(t, err)
// collect funds (from receiver, though either party can do it)
collectMsg, err := paymentReceiver.PaychCollect(ctx, channel)
require.NoError(t, err)
//stm: @CHAIN_STATE_WAIT_MSG_001
res, err = paymentReceiver.StateWaitMsg(ctx, collectMsg, 3, api.LookbackNoLimit, true)
require.NoError(t, err)
require.EqualValues(t, 0, res.Receipt.ExitCode, "unable to collect on payment channel")
// Finally, check the balance for the creator
currentCreatorBalance, err := paymentCreator.WalletBalance(ctx, createrAddr)
require.NoError(t, err)
// The highest nonce voucher that the creator sent on each lane is 2000
totalVouchers := int64(len(lanes) * 2000)
// When receiver submits the tokens to the chain, creator should get a
// refund on the remaining balance, which is
// channel amount - total voucher value
expectedRefund := channelAmt - totalVouchers
delta := big.Sub(currentCreatorBalance, creatorPreCollectBalance)
require.EqualValues(t, abi.NewTokenAmount(expectedRefund), delta, "did not send correct funds from creator: expected %d, got %d", expectedRefund, delta)
}
func waitForBlocks(ctx context.Context, t *testing.T, bm *kit.BlockMiner, paymentReceiver kit.TestFullNode, receiverAddr address.Address, count int) {
// We need to add null blocks in batches, if we add too many the chain can't sync
batchSize := 60
for i := 0; i < count; i += batchSize {
size := batchSize
if i > count {
size = count - i
}
// Add a batch of null blocks to advance the chain quicker through finalities.
bm.InjectNulls(abi.ChainEpoch(size - 1))
// Add a real block
m, err := paymentReceiver.MpoolPushMessage(ctx, &types.Message{
To: builtin.BurntFundsActorAddr,
From: receiverAddr,
Value: types.NewInt(0),
}, nil)
require.NoError(t, err)
_, err = paymentReceiver.StateWaitMsg(ctx, m.Cid(), 1, api.LookbackNoLimit, true)
require.NoError(t, err)
}
}
func waitForMessage(ctx context.Context, t *testing.T, paymentCreator kit.TestFullNode, msgCid cid.Cid, duration time.Duration, desc string) *api.MsgLookup {
ctx, cancel := context.WithTimeout(ctx, duration)
defer cancel()
t.Log("Waiting for", desc)
res, err := paymentCreator.StateWaitMsg(ctx, msgCid, 1, api.LookbackNoLimit, true)
require.NoError(t, err)
require.EqualValues(t, 0, res.Receipt.ExitCode, "did not successfully send %s", desc)
t.Log("Confirmed", desc)
return res
}