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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/hashicorp/go-multierror"
"github.com/spacemeshos/go-spacemesh/activation"
"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"
)
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)
return f.getHashes(ctx, hashes, datastore.ATXDB, f.validators.atx.HandleMessage)
}
type dataReceiver func(context.Context, p2p.Peer, []byte) error
func (f *Fetch) getHashes(ctx context.Context, hashes []types.Hash32, hint datastore.Hint, receiver dataReceiver) error {
var eg multierror.Group
for _, hash := range hashes {
p, err := f.getHash(ctx, hash, hint, receiver)
if err != nil {
return err
}
if p == nil {
// data is available locally
continue
}
h := hash
eg.Go(func() error {
select {
case <-ctx.Done():
return ctx.Err()
case <-p.completed:
if p.err != nil {
return fmt.Errorf("hint: %v, hash: %v, err: %w", hint, h.String(), p.err)
}
return nil
}
})
}
return eg.Wait().ErrorOrNil()
}
// GetMalfeasanceProofs gets malfeasance proofs for the specified NodeIDs and validates them.
func (f *Fetch) GetMalfeasanceProofs(ctx context.Context, ids []types.NodeID) error {
if len(ids) == 0 {
return nil
}
f.logger.WithContext(ctx).With().Debug("requesting malfeasance proofs from peer", log.Int("num_proofs", len(ids)))
hashes := types.NodeIDsToHashes(ids)
return f.getHashes(ctx, hashes, datastore.Malfeasance, f.validators.malfeasance.HandleMessage)
}
// 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)
return f.getHashes(ctx, hashes, datastore.BallotDB, f.validators.ballot.HandleMessage)
}
// 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)
return f.getHashes(ctx, hashes, datastore.ProposalDB, f.validators.proposal.HandleMessage)
}
// 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)
return f.getHashes(ctx, hashes, datastore.BlockDB, f.validators.block.HandleMessage)
}
// 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.validators.txProposal.HandleMessage)
}
// 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.validators.txBlock.HandleMessage)
}
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)
return f.getHashes(ctx, hashes, datastore.TXDB, receiver)
}
// 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.Stringer("hash", id))
pm, err := f.getHash(ctx, id, datastore.POETDB, f.validators.poet.HandleMessage)
if err != nil {
return err
}
if pm == nil {
// data is available locally
return nil
}
select {
case <-ctx.Done():
return ctx.Err()
case <-pm.completed:
}
switch {
case pm.err == nil:
return nil
case errors.Is(pm.err, activation.ErrObjectExists):
// PoET proofs are concurrently stored in DB in two places:
// fetcher and nipost builder. Hence it might happen that
// a proof had been inserted into the DB while the fetcher
// was fetching.
return nil
default:
f.logger.WithContext(ctx).With().Warning("failed to get hash",
log.String("hint", string(datastore.POETDB)),
log.Stringer("hash", id),
log.Err(pm.err))
return pm.err
}
}
func (f *Fetch) GetMaliciousIDs(ctx context.Context, peers []p2p.Peer, okCB func([]byte, p2p.Peer), errCB func(error, p2p.Peer)) error {
return poll(ctx, f.servers[malProtocol], peers, []byte{}, okCB, errCB)
}
// 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 {
lidBytes, err := codec.Encode(&lid)
if err != nil {
return err
}
return poll(ctx, f.servers[lyrDataProtocol], peers, lidBytes, 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 {
lidBytes, err := codec.Encode(&lid)
if err != nil {
return err
}
return poll(ctx, f.servers[lyrOpnsProtocol], peers, lidBytes, 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
)
okCB := func(data []byte) {
defer close(done)
done <- codec.Decode(data, &ed)
}
errCB := func(perr error) {
defer close(done)
done <- perr
}
epochBytes, err := codec.Encode(epoch)
if err != nil {
return nil, err
}
if err := f.servers[atxProtocol].Request(ctx, peer, epochBytes, 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():
f.logger.WithContext(ctx).With().Debug("context done")
return nil, ctx.Err()
}
}
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
)
reqData, err := codec.Encode(req)
if err != nil {
f.logger.With().Fatal("failed to encode mesh hash request", log.Err(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{
Hashes: hashes,
}, nil
case <-ctx.Done():
return nil, ctx.Err()
}
}