lotus/chain/deals/asks.go

164 lines
3.4 KiB
Go
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2019-09-13 21:00:36 +00:00
package deals
import (
"context"
"time"
"github.com/filecoin-project/go-lotus/chain/address"
"github.com/filecoin-project/go-lotus/chain/stmgr"
"github.com/filecoin-project/go-lotus/chain/types"
"github.com/filecoin-project/go-lotus/lib/cborrpc"
datastore "github.com/ipfs/go-datastore"
cbor "github.com/ipfs/go-ipld-cbor"
inet "github.com/libp2p/go-libp2p-core/network"
"golang.org/x/xerrors"
)
func (h *Handler) SetPrice(p types.BigInt, ttlsecs int64) error {
h.askLk.Lock()
defer h.askLk.Unlock()
var seqno uint64
if h.ask != nil {
seqno = h.ask.Ask.SeqNo + 1
}
now := time.Now().Unix()
ask := &types.StorageAsk{
Price: p,
Timestamp: now,
Expiry: now + ttlsecs,
Miner: h.actor,
SeqNo: seqno,
MinPieceSize: h.minPieceSize,
}
ssa, err := h.signAsk(ask)
if err != nil {
return err
}
return h.saveAsk(ssa)
}
func (h *Handler) getAsk(m address.Address) *types.SignedStorageAsk {
h.askLk.Lock()
defer h.askLk.Unlock()
if m != h.actor {
return nil
}
return h.ask
}
func (h *Handler) HandleAskStream(s inet.Stream) {
defer s.Close()
var ar AskRequest
if err := cborrpc.ReadCborRPC(s, &ar); err != nil {
log.Errorf("failed to read AskRequest from incoming stream: %s", err)
return
}
resp := h.processAskRequest(&ar)
if err := cborrpc.WriteCborRPC(s, resp); err != nil {
log.Errorf("failed to write ask response: %s", err)
return
}
}
func (h *Handler) processAskRequest(ar *AskRequest) *AskResponse {
return &AskResponse{
Ask: h.getAsk(ar.Miner),
}
}
var bestAskKey = datastore.NewKey("latest-ask")
func (h *Handler) tryLoadAsk() error {
h.askLk.Lock()
defer h.askLk.Unlock()
err := h.loadAsk()
if err != nil {
if xerrors.Is(err, datastore.ErrNotFound) {
log.Warn("no previous ask found, miner will not accept deals until a price is set")
return nil
}
return err
}
return nil
}
func (h *Handler) loadAsk() error {
askb, err := h.ds.Get(datastore.NewKey("latest-ask"))
if err != nil {
return xerrors.Errorf("failed to load most recent ask from disk: %w", err)
}
var ssa types.SignedStorageAsk
if err := cbor.DecodeInto(askb, &ssa); err != nil {
return err
}
h.ask = &ssa
return nil
}
func (h *Handler) signAsk(a *types.StorageAsk) (*types.SignedStorageAsk, error) {
b, err := cbor.DumpObject(a)
if err != nil {
return nil, err
}
worker, err := h.getWorker(h.actor)
if err != nil {
return nil, xerrors.Errorf("failed to get worker to sign ask: %w", err)
}
sig, err := h.full.WalletSign(context.TODO(), worker, b)
if err != nil {
return nil, err
}
return &types.SignedStorageAsk{
Ask: a,
Signature: sig,
}, nil
}
func (h *Handler) saveAsk(a *types.SignedStorageAsk) error {
b, err := cbor.DumpObject(a)
if err != nil {
return err
}
if err := h.ds.Put(bestAskKey, b); err != nil {
return err
}
h.ask = a
return nil
}
func (c *Client) checkAskSignature(ask *types.SignedStorageAsk) error {
tss, err := c.sm.TipSetState(c.sm.ChainStore().GetHeaviestTipSet().Cids())
if err != nil {
return xerrors.Errorf("failed to get tipsetstate to query for miner worker: %w", err)
}
w, err := stmgr.GetMinerWorker(context.TODO(), c.sm, tss, ask.Ask.Miner)
if err != nil {
return xerrors.Errorf("failed to get worker for miner in ask", err)
}
sigb, err := cbor.DumpObject(ask.Ask)
if err != nil {
return xerrors.Errorf("failed to re-serialize ask")
}
return ask.Signature.Verify(w, sigb)
}