lotus/chain/deals/client_utils.go
2020-01-09 22:23:31 +01:00

171 lines
4.8 KiB
Go

package deals
import (
"bytes"
"context"
"runtime"
"github.com/ipfs/go-cid"
files "github.com/ipfs/go-ipfs-files"
unixfile "github.com/ipfs/go-unixfs/file"
"github.com/ipld/go-ipld-prime"
"github.com/libp2p/go-libp2p-core/peer"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-cbor-util"
"github.com/filecoin-project/lotus/datatransfer"
"github.com/filecoin-project/lotus/lib/padreader"
"github.com/filecoin-project/lotus/lib/sectorbuilder"
"github.com/filecoin-project/lotus/lib/statestore"
"github.com/filecoin-project/lotus/node/modules/dtypes"
)
func (c *Client) failDeal(id cid.Cid, cerr error) {
if cerr == nil {
_, f, l, _ := runtime.Caller(1)
cerr = xerrors.Errorf("unknown error (fail called at %s:%d)", f, l)
}
s, ok := c.conns[id]
if ok {
_ = s.Reset()
delete(c.conns, id)
}
// TODO: store in some sort of audit log
log.Errorf("deal %s failed: %+v", id, cerr)
}
func (c *Client) commP(ctx context.Context, data cid.Cid) ([]byte, uint64, 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")
}
s, err := uf.Size()
if err != nil {
return nil, 0, err
}
pr, psize := padreader.New(uf, uint64(s))
commp, err := sectorbuilder.GeneratePieceCommitment(pr, psize)
if err != nil {
return nil, 0, xerrors.Errorf("generating CommP: %w", err)
}
return commp[:], psize, nil
}
func (c *Client) readStorageDealResp(deal ClientDeal) (*Response, error) {
s, ok := c.conns[deal.ProposalCid]
if !ok {
// TODO: Try to re-establish the connection using query protocol
return nil, xerrors.Errorf("no connection to miner")
}
var resp SignedResponse
if err := cborutil.ReadCborRPC(s, &resp); err != nil {
log.Errorw("failed to read Response message", "error", err)
return nil, err
}
if err := resp.Verify(deal.MinerWorker); err != nil {
return nil, xerrors.Errorf("verifying response signature failed", err)
}
if resp.Response.Proposal != deal.ProposalCid {
return nil, xerrors.Errorf("miner responded to a wrong proposal: %s != %s", resp.Response.Proposal, deal.ProposalCid)
}
return &resp.Response, nil
}
func (c *Client) disconnect(deal ClientDeal) error {
s, ok := c.conns[deal.ProposalCid]
if !ok {
return nil
}
err := s.Close()
delete(c.conns, deal.ProposalCid)
return err
}
var _ datatransfer.RequestValidator = &ClientRequestValidator{}
// ClientRequestValidator validates data transfer requests for the client
// in a storage market
type ClientRequestValidator struct {
deals *statestore.StateStore
}
// NewClientRequestValidator returns a new client request validator for the
// given datastore
func NewClientRequestValidator(deals dtypes.ClientDealStore) *ClientRequestValidator {
crv := &ClientRequestValidator{
deals: deals,
}
return crv
}
// ValidatePush validates a push request received from the peer that will send data
// Will always error because clients should not accept push requests from a provider
// in a storage deal (i.e. send data to client).
func (c *ClientRequestValidator) ValidatePush(
sender peer.ID,
voucher datatransfer.Voucher,
baseCid cid.Cid,
Selector ipld.Node) error {
return ErrNoPushAccepted
}
// ValidatePull validates a pull request received from the peer that will receive data
// Will succeed only if:
// - voucher has correct type
// - voucher references an active deal
// - referenced deal matches the receiver (miner)
// - referenced deal matches the given base CID
// - referenced deal is in an acceptable state
func (c *ClientRequestValidator) ValidatePull(
receiver peer.ID,
voucher datatransfer.Voucher,
baseCid cid.Cid,
Selector ipld.Node) error {
dealVoucher, ok := voucher.(*StorageDataTransferVoucher)
if !ok {
return xerrors.Errorf("voucher type %s: %w", voucher.Identifier(), ErrWrongVoucherType)
}
var deal ClientDeal
err := c.deals.Get(dealVoucher.Proposal).Get(&deal)
if err != nil {
return xerrors.Errorf("Proposal CID %s: %w", dealVoucher.Proposal.String(), ErrNoDeal)
}
if deal.Miner != receiver {
return xerrors.Errorf("Deal Peer %s, Data Transfer Peer %s: %w", deal.Miner.String(), receiver.String(), ErrWrongPeer)
}
if !bytes.Equal(deal.Proposal.PieceRef, baseCid.Bytes()) {
return xerrors.Errorf("Deal Payload CID %s, Data Transfer CID %s: %w", string(deal.Proposal.PieceRef), baseCid.String(), ErrWrongPiece)
}
for _, state := range DataTransferStates {
if deal.State == state {
return nil
}
}
return xerrors.Errorf("Deal State %s: %w", deal.State, ErrInacceptableDealState)
}