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mesh_data.go
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mesh_data.go
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package fetch
import (
"context"
"errors"
"fmt"
"github.com/spacemeshos/go-spacemesh/codec"
"github.com/spacemeshos/go-spacemesh/common/types"
"github.com/spacemeshos/go-spacemesh/datastore"
"github.com/spacemeshos/go-spacemesh/log"
"github.com/spacemeshos/go-spacemesh/p2p"
"github.com/spacemeshos/go-spacemesh/sql"
)
var errBadRequest = errors.New("invalid request")
// GetAtxs gets the data for given atx IDs and validates them. returns an error if at least one ATX cannot be fetched.
func (f *Fetch) GetAtxs(ctx context.Context, ids []types.ATXID) error {
if len(ids) == 0 {
return nil
}
f.logger.WithContext(ctx).With().Debug("requesting atxs from peer", log.Int("num_atxs", len(ids)))
hashes := types.ATXIDsToHashes(ids)
if errs := f.getHashes(ctx, hashes, datastore.ATXDB, f.atxHandler.HandleAtxData); len(errs) > 0 {
return errs[0]
}
return nil
}
type dataReceiver func(context.Context, []byte) error
func (f *Fetch) getHashes(ctx context.Context, hashes []types.Hash32, hint datastore.Hint, receiver dataReceiver) []error {
errs := make([]error, 0, len(hashes))
results := f.GetHashes(hashes, hint, false)
for hash, resC := range results {
select {
case <-ctx.Done():
f.logger.WithContext(ctx).With().Warning("request timed out",
log.String("hint", string(hint)),
log.String("hash", hash.ShortString()))
return []error{ctx.Err()}
case res, open := <-resC:
if !open {
f.logger.WithContext(ctx).With().Info("res channel closed",
log.String("hint", string(hint)),
log.String("hash", hash.ShortString()))
continue
}
if res.Err != nil {
f.logger.WithContext(ctx).With().Warning("cannot find hash",
log.String("hint", string(hint)),
log.String("hash", hash.String()),
log.Err(res.Err))
errs = append(errs, res.Err)
continue
}
if !res.IsLocal {
if err := receiver(ctx, res.Data); err != nil {
f.logger.WithContext(ctx).With().Warning("failed to handle data",
log.String("hint", string(hint)),
log.String("hash", hash.String()),
log.Err(err))
errs = append(errs, err)
}
}
}
}
return errs
}
// GetBallots gets data for the specified BallotIDs and validates them.
func (f *Fetch) GetBallots(ctx context.Context, ids []types.BallotID) error {
if len(ids) == 0 {
return nil
}
f.logger.WithContext(ctx).With().Debug("requesting ballots from peer", log.Int("num_ballots", len(ids)))
hashes := types.BallotIDsToHashes(ids)
if errs := f.getHashes(ctx, hashes, datastore.BallotDB, f.ballotHandler.HandleSyncedBallot); len(errs) > 0 {
return errs[0]
}
return nil
}
// GetProposals gets the data for given proposal IDs from peers.
func (f *Fetch) GetProposals(ctx context.Context, ids []types.ProposalID) error {
if len(ids) == 0 {
return nil
}
f.logger.WithContext(ctx).With().Debug("requesting proposals from peer", log.Int("num_proposals", len(ids)))
hashes := types.ProposalIDsToHashes(ids)
if errs := f.getHashes(ctx, hashes, datastore.ProposalDB, f.proposalHandler.HandleSyncedProposal); len(errs) > 0 {
return errs[0]
}
return nil
}
// GetBlocks gets the data for given block IDs from peers.
func (f *Fetch) GetBlocks(ctx context.Context, ids []types.BlockID) error {
if len(ids) == 0 {
return nil
}
f.logger.WithContext(ctx).With().Debug("requesting blocks from peer", log.Int("num_blocks", len(ids)))
hashes := types.BlockIDsToHashes(ids)
if errs := f.getHashes(ctx, hashes, datastore.BlockDB, f.blockHandler.HandleSyncedBlock); len(errs) > 0 {
return errs[0]
}
return nil
}
// GetProposalTxs fetches the txs provided as IDs and validates them, returns an error if one TX failed to be fetched.
func (f *Fetch) GetProposalTxs(ctx context.Context, ids []types.TransactionID) error {
return f.getTxs(ctx, ids, f.txHandler.HandleProposalTransaction)
}
// GetBlockTxs fetches the txs provided as IDs and saves them, they will be validated
// before block is applied.
func (f *Fetch) GetBlockTxs(ctx context.Context, ids []types.TransactionID) error {
return f.getTxs(ctx, ids, f.txHandler.HandleBlockTransaction)
}
func (f *Fetch) getTxs(ctx context.Context, ids []types.TransactionID, receiver dataReceiver) error {
if len(ids) == 0 {
return nil
}
f.logger.WithContext(ctx).With().Debug("requesting txs from peer", log.Int("num_txs", len(ids)))
hashes := types.TransactionIDsToHashes(ids)
if errs := f.getHashes(ctx, hashes, datastore.TXDB, receiver); len(errs) > 0 {
return errs[0]
}
return nil
}
// GetPoetProof gets poet proof from remote peer.
func (f *Fetch) GetPoetProof(ctx context.Context, id types.Hash32) error {
f.logger.WithContext(ctx).With().Debug("getting poet proof", log.String("hash", id.ShortString()))
res := <-f.GetHash(id, datastore.POETDB, false)
if res.Err != nil {
return res.Err
}
// if result is local we don't need to process it again
if !res.IsLocal {
f.logger.WithContext(ctx).Debug("got poet ref",
log.String("hash", id.ShortString()),
log.Int("dataSize", len(res.Data)))
if err := f.poetHandler.ValidateAndStoreMsg(res.Data); err != nil && !errors.Is(err, sql.ErrObjectExists) {
return fmt.Errorf("validate and store message: %w", err)
}
}
return nil
}
// GetLayerData get layer data from peers.
func (f *Fetch) GetLayerData(ctx context.Context, peers []p2p.Peer, lid types.LayerID, okCB func([]byte, p2p.Peer), errCB func(error, p2p.Peer)) error {
return poll(ctx, f.servers[lyrDataProtocol], peers, lid.Bytes(), okCB, errCB)
}
// GetLayerOpinions get opinions on data in the specified layer from peers.
func (f *Fetch) GetLayerOpinions(ctx context.Context, peers []p2p.Peer, lid types.LayerID, okCB func([]byte, p2p.Peer), errCB func(error, p2p.Peer)) error {
return poll(ctx, f.servers[lyrOpnsProtocol], peers, lid.Bytes(), okCB, errCB)
}
func poll(ctx context.Context, srv requester, peers []p2p.Peer, req []byte, okCB func([]byte, p2p.Peer), errCB func(error, p2p.Peer)) error {
for _, p := range peers {
peer := p
okFunc := func(data []byte) {
okCB(data, peer)
}
errFunc := func(err error) {
errCB(err, peer)
}
if err := srv.Request(ctx, peer, req, okFunc, errFunc); err != nil {
errFunc(err)
}
}
return nil
}
// PeerEpochInfo get the epoch info published in the given epoch from the specified peer.
func (f *Fetch) PeerEpochInfo(ctx context.Context, peer p2p.Peer, epoch types.EpochID) (*EpochData, error) {
f.logger.WithContext(ctx).With().Debug("requesting epoch info from peer",
log.Stringer("peer", peer),
log.Stringer("epoch", epoch))
var (
done = make(chan error, 1)
ed EpochData
err error
)
okCB := func(data []byte) {
defer close(done)
done <- codec.Decode(data, &ed)
}
errCB := func(perr error) {
defer close(done)
done <- perr
}
if err = f.servers[atxProtocol].Request(ctx, peer, epoch.ToBytes(), okCB, errCB); err != nil {
return nil, err
}
select {
case err := <-done:
if err != nil {
return nil, err
}
f.RegisterPeerHashes(peer, types.ATXIDsToHashes(ed.AtxIDs))
return &ed, nil
case <-ctx.Done():
return nil, ctx.Err()
}
}
func iterateLayers(req *MeshHashRequest) ([]types.LayerID, error) {
var diff uint32
if req.To.After(req.From) {
diff = req.To.Difference(req.From)
}
if diff == 0 || diff > req.Delta*req.Steps || diff < req.Delta*(req.Steps-1) {
return nil, fmt.Errorf("%w: %v", errBadRequest, req)
}
lids := make([]types.LayerID, req.Steps+1)
lids[0] = req.From
for i := uint32(1); i <= req.Steps; i++ {
lids[i] = lids[i-1].Add(req.Delta)
}
if lids[req.Steps].After(req.To) {
lids[req.Steps] = req.To
}
return lids, nil
}
func (f *Fetch) PeerMeshHashes(ctx context.Context, peer p2p.Peer, req *MeshHashRequest) (*MeshHashes, error) {
f.logger.WithContext(ctx).With().Debug("requesting mesh hashes from peer",
log.Stringer("peer", peer),
log.Object("req", req))
var (
done = make(chan error, 1)
hashes []types.Hash32
reqData []byte
err error
)
reqData, err = codec.Encode(req)
if err != nil {
f.logger.Fatal("failed to encode mesh hash request", log.Err(err))
}
lids, err := iterateLayers(req)
if err != nil {
return nil, err
}
okCB := func(data []byte) {
defer close(done)
h, err := codec.DecodeSlice[types.Hash32](data)
hashes = h
done <- err
}
errCB := func(perr error) {
defer close(done)
done <- perr
}
if err = f.servers[meshHashProtocol].Request(ctx, peer, reqData, okCB, errCB); err != nil {
return nil, err
}
select {
case err := <-done:
if err != nil {
return nil, err
}
return &MeshHashes{
Layers: lids,
Hashes: hashes,
}, nil
case <-ctx.Done():
return nil, ctx.Err()
}
}