lotus/chain/deals/client.go
2019-08-29 17:48:19 +02:00

252 lines
5.7 KiB
Go

package deals
import (
"context"
"math"
"github.com/filecoin-project/go-lotus/chain/actors"
sectorbuilder "github.com/filecoin-project/go-sectorbuilder"
"github.com/ipfs/go-cid"
"github.com/ipfs/go-datastore"
"github.com/ipfs/go-datastore/namespace"
files "github.com/ipfs/go-ipfs-files"
cbor "github.com/ipfs/go-ipld-cbor"
logging "github.com/ipfs/go-log"
unixfile "github.com/ipfs/go-unixfs/file"
"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/go-lotus/chain/address"
"github.com/filecoin-project/go-lotus/chain/store"
"github.com/filecoin-project/go-lotus/chain/types"
"github.com/filecoin-project/go-lotus/chain/wallet"
"github.com/filecoin-project/go-lotus/lib/cborrpc"
"github.com/filecoin-project/go-lotus/node/modules/dtypes"
)
func init() {
cbor.RegisterCborType(ClientDeal{})
}
var log = logging.Logger("deals")
const ProtocolID = "/fil/storage/mk/1.0.0"
type DealStatus int
const (
DealResolvingMiner = DealStatus(iota)
)
type ClientDeal struct {
ProposalCid cid.Cid
Status DealStatus
Miner peer.ID
}
type Client struct {
cs *store.ChainStore
h host.Host
w *wallet.Wallet
dag dtypes.ClientDAG
deals StateStore
incoming chan ClientDeal
stop chan struct{}
stopped chan struct{}
}
func NewClient(cs *store.ChainStore, h host.Host, w *wallet.Wallet, ds dtypes.MetadataDS, dag dtypes.ClientDAG) *Client {
c := &Client{
cs: cs,
h: h,
w: w,
dag: dag,
deals: StateStore{ds: namespace.Wrap(ds, datastore.NewKey("/deals/client"))},
incoming: make(chan ClientDeal, 16),
stop: make(chan struct{}),
stopped: make(chan struct{}),
}
return c
}
func (c *Client) Run() {
go func() {
defer close(c.stopped)
for {
select {
case deal := <-c.incoming:
log.Info("incoming deal")
// TODO: track in datastore
if err := c.deals.Begin(deal.ProposalCid, deal); err != nil {
log.Errorf("deal state begin failed: %s", err)
continue
}
case <-c.stop:
return
}
}
}()
}
func (c *Client) commP(ctx context.Context, data cid.Cid) ([]byte, int64, error) {
root, err := c.dag.Get(ctx, data)
if err != nil {
log.Errorf("failed to get file root for deal: %s", err)
return nil, 0, err
}
n, err := unixfile.NewUnixfsFile(ctx, c.dag, root)
if err != nil {
log.Errorf("cannot open unixfs file: %s", err)
return nil, 0, err
}
uf, ok := n.(files.File)
if !ok {
// TODO: we probably got directory, how should we handle this in unixfs mode?
return nil, 0, xerrors.New("unsupported unixfs type")
}
size, err := uf.Size()
if err != nil {
return nil, 0, err
}
var commP [sectorbuilder.CommitmentBytesLen]byte
err = withTemp(uf, func(f string) error {
commP, err = sectorbuilder.GeneratePieceCommitment(f, uint64(size))
return err
})
return commP[:], size, err
}
func (c *Client) sendProposal(s inet.Stream, proposal StorageDealProposal, from address.Address) error {
log.Info("Sending deal proposal")
msg, err := cbor.DumpObject(proposal)
if err != nil {
return err
}
sig, err := c.w.Sign(context.TODO(), from, msg)
if err != nil {
return err
}
signedProposal := &SignedStorageDealProposal{
Proposal: proposal,
Signature: sig,
}
return cborrpc.WriteCborRPC(s, signedProposal)
}
func (c *Client) waitAccept(s inet.Stream, proposal StorageDealProposal, minerID peer.ID) (ClientDeal, error) {
log.Info("Waiting for response")
var resp SignedStorageDealResponse
if err := cborrpc.ReadCborRPC(s, &resp); err != nil {
log.Errorw("failed to read StorageDealResponse message", "error", err)
return ClientDeal{}, err
}
// TODO: verify signature
if resp.Response.State != Accepted {
return ClientDeal{}, xerrors.Errorf("Deal wasn't accepted (State=%d)", resp.Response.State)
}
proposalNd, err := cbor.WrapObject(proposal, math.MaxUint64, -1)
if err != nil {
return ClientDeal{}, err
}
if resp.Response.Proposal != proposalNd.Cid() {
return ClientDeal{}, xerrors.New("miner responded to a wrong proposal")
}
return ClientDeal{
ProposalCid: proposalNd.Cid(),
Status: DealResolvingMiner,
Miner: minerID,
}, nil
}
type ClientDealProposal struct {
Data cid.Cid
TotalPrice types.BigInt
Duration uint64
Payment actors.PaymentInfo
MinerAddress address.Address
ClientAddress address.Address
MinerID peer.ID
}
func (c *Client) VerifyParams(ctx context.Context, data cid.Cid) (*actors.PieceInclVoucherData, error) {
commP, size, err := c.commP(ctx, data)
if err != nil {
return nil, err
}
return &actors.PieceInclVoucherData{
CommP: commP,
PieceSize: types.NewInt(uint64(size)),
}, nil
}
func (c *Client) Start(ctx context.Context, p ClientDealProposal, vd *actors.PieceInclVoucherData) (cid.Cid, error) {
// TODO: use data
proposal := StorageDealProposal{
PieceRef: p.Data,
SerializationMode: SerializationUnixFs,
CommP: vd.CommP[:],
Size: vd.PieceSize.Uint64(),
TotalPrice: p.TotalPrice,
Duration: p.Duration,
Payment: p.Payment,
MinerAddress: p.MinerAddress,
ClientAddress: p.ClientAddress,
}
s, err := c.h.NewStream(ctx, p.MinerID, ProtocolID)
if err != nil {
return cid.Undef, err
}
defer s.Reset() // TODO: handle other updates
if err := c.sendProposal(s, proposal, p.ClientAddress); err != nil {
return cid.Undef, err
}
deal, err := c.waitAccept(s, proposal, p.MinerID)
if err != nil {
return cid.Undef, err
}
log.Info("DEAL ACCEPTED!")
// TODO: actually care about what happens with the deal after it was accepted
//c.incoming <- deal
return deal.ProposalCid, nil
}
func (c *Client) Stop() {
close(c.stop)
<-c.stopped
}