lotus/chain/deals/client.go
2019-10-23 12:44:00 +02:00

260 lines
6.0 KiB
Go

package deals
import (
"context"
"github.com/ipfs/go-cid"
"github.com/ipfs/go-datastore"
"github.com/ipfs/go-datastore/namespace"
logging "github.com/ipfs/go-log"
"github.com/libp2p/go-libp2p-core/host"
inet "github.com/libp2p/go-libp2p-core/network"
"github.com/libp2p/go-libp2p-core/peer"
"golang.org/x/xerrors"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/chain/actors"
"github.com/filecoin-project/lotus/chain/address"
"github.com/filecoin-project/lotus/chain/stmgr"
"github.com/filecoin-project/lotus/chain/store"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/chain/wallet"
"github.com/filecoin-project/lotus/lib/cborrpc"
"github.com/filecoin-project/lotus/node/modules/dtypes"
"github.com/filecoin-project/lotus/retrieval/discovery"
)
var log = logging.Logger("deals")
type ClientDeal struct {
ProposalCid cid.Cid
Proposal actors.StorageDealProposal
State api.DealState
Miner peer.ID
s inet.Stream
}
type Client struct {
sm *stmgr.StateManager
chain *store.ChainStore
h host.Host
w *wallet.Wallet
dag dtypes.ClientDAG
discovery *discovery.Local
deals ClientStateStore
conns map[cid.Cid]inet.Stream
incoming chan ClientDeal
updated chan clientDealUpdate
stop chan struct{}
stopped chan struct{}
}
type clientDealUpdate struct {
newState api.DealState
id cid.Cid
err error
}
func NewClient(sm *stmgr.StateManager, chain *store.ChainStore, h host.Host, w *wallet.Wallet, ds dtypes.MetadataDS, dag dtypes.ClientDAG, discovery *discovery.Local) *Client {
c := &Client{
sm: sm,
chain: chain,
h: h,
w: w,
dag: dag,
discovery: discovery,
deals: ClientStateStore{StateStore{ds: namespace.Wrap(ds, datastore.NewKey("/deals/client"))}},
conns: map[cid.Cid]inet.Stream{},
incoming: make(chan ClientDeal, 16),
updated: make(chan clientDealUpdate, 16),
stop: make(chan struct{}),
stopped: make(chan struct{}),
}
return c
}
func (c *Client) Run(ctx context.Context) {
go func() {
defer close(c.stopped)
for {
select {
case deal := <-c.incoming:
c.onIncoming(deal)
case update := <-c.updated:
c.onUpdated(ctx, update)
case <-c.stop:
return
}
}
}()
}
func (c *Client) onIncoming(deal ClientDeal) {
log.Info("incoming deal")
if _, ok := c.conns[deal.ProposalCid]; ok {
log.Errorf("tracking deal connection: already tracking connection for deal %s", deal.ProposalCid)
return
}
c.conns[deal.ProposalCid] = deal.s
if err := c.deals.Begin(deal.ProposalCid, deal); err != nil {
// We may have re-sent the proposal
log.Errorf("deal tracking failed: %s", err)
c.failDeal(deal.ProposalCid, err)
return
}
go func() {
c.updated <- clientDealUpdate{
newState: api.DealUnknown,
id: deal.ProposalCid,
err: nil,
}
}()
}
func (c *Client) onUpdated(ctx context.Context, update clientDealUpdate) {
log.Infof("Deal %s updated state to %d", update.id, update.newState)
var deal ClientDeal
err := c.deals.MutateClient(update.id, func(d *ClientDeal) error {
d.State = update.newState
deal = *d
return nil
})
if update.err != nil {
log.Errorf("deal %s failed: %s", update.id, update.err)
c.failDeal(update.id, update.err)
return
}
if err != nil {
c.failDeal(update.id, err)
return
}
switch update.newState {
case api.DealUnknown: // new
c.handle(ctx, deal, c.new, api.DealAccepted)
case api.DealAccepted:
c.handle(ctx, deal, c.accepted, api.DealStaged)
case api.DealStaged:
c.handle(ctx, deal, c.staged, api.DealSealing)
case api.DealSealing:
c.handle(ctx, deal, c.sealing, api.DealComplete)
}
}
type ClientDealProposal struct {
Data cid.Cid
DataSize uint64
TotalPrice types.BigInt
ProposalExpiration uint64
Duration uint64
ProviderAddress address.Address
Client address.Address
MinerID peer.ID
}
func (c *Client) Start(ctx context.Context, p ClientDealProposal) (cid.Cid, error) {
proposal := actors.StorageDealProposal{
PieceRef: p.Data.Bytes(),
PieceSize: p.DataSize,
PieceSerialization: actors.SerializationUnixFSv0,
Client: p.Client,
Provider: p.ProviderAddress,
ProposalExpiration: p.ProposalExpiration,
Duration: p.Duration,
StoragePrice: p.TotalPrice,
StorageCollateral: types.NewInt(p.DataSize), // TODO: real calc
}
if err := api.SignWith(ctx, c.w.Sign, p.Client, &proposal); err != nil {
return cid.Undef, err
}
proposalNd, err := cborrpc.AsIpld(proposal)
if err != nil {
return cid.Undef, err
}
s, err := c.h.NewStream(ctx, p.MinerID, DealProtocolID)
if err != nil {
s.Reset()
return cid.Undef, err
}
if err := cborrpc.WriteCborRPC(s, proposal); err != nil {
s.Reset()
return cid.Undef, err
}
deal := ClientDeal{
ProposalCid: proposalNd.Cid(),
Proposal: proposal,
State: api.DealUnknown,
Miner: p.MinerID,
s: s,
}
c.incoming <- deal
return deal.ProposalCid, c.discovery.AddPeer(p.Data, discovery.RetrievalPeer{
Address: proposal.Provider,
ID: deal.Miner,
})
}
func (c *Client) QueryAsk(ctx context.Context, p peer.ID, a address.Address) (*types.SignedStorageAsk, error) {
s, err := c.h.NewStream(ctx, p, AskProtocolID)
if err != nil {
return nil, err
}
req := &AskRequest{
Miner: a,
}
if err := cborrpc.WriteCborRPC(s, req); err != nil {
return nil, xerrors.Errorf("failed to send ask request: %w", err)
}
var out AskResponse
if err := cborrpc.ReadCborRPC(s, &out); err != nil {
return nil, xerrors.Errorf("failed to read ask response: %w", err)
}
if out.Ask == nil {
return nil, xerrors.Errorf("got no ask back")
}
if out.Ask.Ask.Miner != a {
return nil, xerrors.Errorf("got back ask for wrong miner")
}
if err := c.checkAskSignature(out.Ask); err != nil {
return nil, xerrors.Errorf("ask was not properly signed")
}
return out.Ask, nil
}
func (c *Client) List() ([]ClientDeal, error) {
return c.deals.ListClient()
}
func (c *Client) Stop() {
close(c.stop)
<-c.stopped
}