lotus/chain/deals/client_utils.go

package deals

import (
	"runtime"

	"github.com/ipfs/go-cid"
	"golang.org/x/xerrors"

	"github.com/filecoin-project/lotus/lib/cborrpc"
)

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: %s", id, cerr)
}

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 := cborrpc.ReadCborRPC(s, &resp); err != nil {
		log.Errorw("failed to read Response message", "error", err)
		return nil, err
	}

	// TODO: verify signature

	if resp.Response.Proposal != deal.ProposalCid {
		return nil, xerrors.New("miner responded to a wrong proposal")
	}

	return &resp.Response, nil
}