// load fetches the saved renter data from disk.
func (r *Renter) load() error {
// Load all files found in renter directory.
dir, err := os.Open(r.persistDir) // TODO: store in a subdir?
if err != nil {
return err
}
defer dir.Close()
filenames, err := dir.Readdirnames(-1)
if err != nil {
return err
}
for _, path := range filenames {
// Skip non-sia files.
if filepath.Ext(path) != ShareExtension {
continue
}
file, err := os.Open(filepath.Join(r.persistDir, path))
if err != nil {
// maybe just skip?
return err
}
_, err = r.loadSharedFiles(file)
file.Close() // defer is probably a bad idea
if err != nil {
// maybe just skip?
return err
}
}
// Load contracts, repair set, and entropy.
data := struct {
Contracts map[string]types.FileContract
Tracking map[string]trackedFile
Repairing map[string]string // COMPATv0.4.8
Entropy [32]byte
}{}
err = persist.LoadFile(saveMetadata, &data, filepath.Join(r.persistDir, PersistFilename))
if err != nil {
return err
}
if data.Tracking != nil {
r.tracking = data.Tracking
} else if data.Repairing != nil {
// COMPATv0.4.8
for nick, path := range data.Repairing {
// these files will be renewed indefinitely
r.tracking[nick] = trackedFile{RepairPath: path, EndHeight: 0}
}
}
r.entropy = data.Entropy
var fcid types.FileContractID
for id, fc := range data.Contracts {
fcid.UnmarshalJSON([]byte(id))
r.contracts[fcid] = fc
}
return nil
}
// applyMissedStorageProof adds the outputs and diffs that result from a file
// contract expiring.
func (cs *State) applyMissedStorageProof(bn *blockNode, fcid types.FileContractID) {
// Sanity checks.
fc, exists := cs.fileContracts[fcid]
if build.DEBUG {
// Check that the file contract in question exists.
if !exists {
panic("misuse of applyMissedProof")
}
// Check that the file contract in question expires at bn.height.
if fc.WindowEnd != bn.height {
panic("applyMissedStorageProof being called at the wrong height")
}
}
// Add all of the outputs in the missed proof outputs to the consensus set.
for i, mpo := range fc.MissedProofOutputs {
// Sanity check - output should not already exist.
spid := fcid.StorageProofOutputID(types.ProofMissed, i)
if build.DEBUG {
_, exists := cs.delayedSiacoinOutputs[bn.height+types.MaturityDelay][spid]
if exists {
panic("missed proof output already exists in the delayed outputs set")
}
_, exists = cs.siacoinOutputs[spid]
if exists {
panic("missed proof output already exists in the siacoin outputs set")
}
}
dscod := modules.DelayedSiacoinOutputDiff{
Direction: modules.DiffApply,
ID: spid,
SiacoinOutput: mpo,
MaturityHeight: bn.height + types.MaturityDelay,
}
bn.delayedSiacoinOutputDiffs = append(bn.delayedSiacoinOutputDiffs, dscod)
cs.commitDelayedSiacoinOutputDiff(dscod, modules.DiffApply)
}
// Remove the contract from the State and record the diff in the blockNode.
delete(cs.fileContracts, fcid)
bn.fileContractDiffs = append(bn.fileContractDiffs, modules.FileContractDiff{
Direction: modules.DiffRevert,
ID: fcid,
FileContract: fc,
})
return
}
// load fetches the saved renter data from disk.
func (r *Renter) load() error {
// Load all files found in renter directory.
dir, err := os.Open(r.persistDir) // TODO: store in a subdir?
if err != nil {
return err
}
filenames, err := dir.Readdirnames(-1)
if err != nil {
return err
}
for _, path := range filenames {
// Skip non-sia files.
if filepath.Ext(path) != ShareExtension {
continue
}
file, err := os.Open(filepath.Join(r.persistDir, path))
if err != nil {
// maybe just skip?
return err
}
_, err = r.loadSharedFiles(file)
if err != nil {
// maybe just skip?
return err
}
}
// Load contracts, repair set, and entropy.
data := struct {
Contracts map[string]types.FileContract
Repairing map[string]string
Entropy [32]byte
}{}
err = persist.LoadFile(saveMetadata, &data, filepath.Join(r.persistDir, PersistFilename))
if err != nil {
return err
}
r.repairSet = data.Repairing
r.entropy = data.Entropy
var fcid types.FileContractID
for id, fc := range data.Contracts {
fcid.UnmarshalJSON([]byte(id))
r.contracts[fcid] = fc
}
return nil
}
// applyMissedStorageProof adds the outputs and diffs that result from a file
// contract expiring.
func (cs *ConsensusSet) applyTxMissedStorageProof(tx *bolt.Tx, pb *processedBlock, fcid types.FileContractID) error {
// Sanity checks.
fc, err := getFileContract(tx, fcid)
if err != nil {
return err
}
if build.DEBUG {
// Check that the file contract in question expires at pb.Height.
if fc.WindowEnd != pb.Height {
panic(errStorageProofTiming)
}
}
// Add all of the outputs in the missed proof outputs to the consensus set.
for i, mpo := range fc.MissedProofOutputs {
// Sanity check - output should not already exist.
spoid := fcid.StorageProofOutputID(types.ProofMissed, uint64(i))
if build.DEBUG {
exists := isSiacoinOutput(tx, spoid)
if exists {
panic(errPayoutsAlreadyPaid)
}
}
dscod := modules.DelayedSiacoinOutputDiff{
Direction: modules.DiffApply,
ID: spoid,
SiacoinOutput: mpo,
MaturityHeight: pb.Height + types.MaturityDelay,
}
pb.DelayedSiacoinOutputDiffs = append(pb.DelayedSiacoinOutputDiffs, dscod)
err = cs.commitTxDelayedSiacoinOutputDiff(tx, dscod, modules.DiffApply)
if err != nil {
return err
}
}
// Remove the file contract from the consensus set and record the diff in
// the blockNode.
fcd := modules.FileContractDiff{
Direction: modules.DiffRevert,
ID: fcid,
FileContract: fc,
}
pb.FileContractDiffs = append(pb.FileContractDiffs, fcd)
return cs.commitTxFileContractDiff(tx, fcd, modules.DiffApply)
}
// applyMissedStorageProof adds the outputs and diffs that result from a file
// contract expiring.
func applyMissedStorageProof(tx *bolt.Tx, pb *processedBlock, fcid types.FileContractID) (dscods []modules.DelayedSiacoinOutputDiff, fcd modules.FileContractDiff) {
// Sanity checks.
fc, err := getFileContract(tx, fcid)
if build.DEBUG && err != nil {
panic(err)
}
if build.DEBUG {
// Check that the file contract in question expires at pb.Height.
if fc.WindowEnd != pb.Height {
panic(errStorageProofTiming)
}
}
// Add all of the outputs in the missed proof outputs to the consensus set.
for i, mpo := range fc.MissedProofOutputs {
// Sanity check - output should not already exist.
spoid := fcid.StorageProofOutputID(types.ProofMissed, uint64(i))
if build.DEBUG && isSiacoinOutput(tx, spoid) {
panic(errPayoutsAlreadyPaid)
}
// Don't add the output if the value is zero.
dscod := modules.DelayedSiacoinOutputDiff{
Direction: modules.DiffApply,
ID: spoid,
SiacoinOutput: mpo,
MaturityHeight: pb.Height + types.MaturityDelay,
}
dscods = append(dscods, dscod)
}
// Remove the file contract from the consensus set and record the diff in
// the blockNode.
fcd = modules.FileContractDiff{
Direction: modules.DiffRevert,
ID: fcid,
FileContract: fc,
}
return dscods, fcd
}
// managedVerifyChallengeResponse will verify that the renter's response to the
// challenge provided by the host is correct. In the process, the storage
// obligation and file contract revision will be loaded and returned.
//
// The storage obligation is returned under a storage obligation lock.
func (h *Host) managedVerifyChallengeResponse(fcid types.FileContractID, challenge crypto.Hash, challengeResponse crypto.Signature) (so storageObligation, recentRevision types.FileContractRevision, revisionSigs []types.TransactionSignature, err error) {
// Grab a lock before it is possible to perform any operations on the
// storage obligation. Defer a call to unlock in the event of an error. If
// there is no error, the storage obligation will be returned with a lock.
err = h.managedTryLockStorageObligation(fcid)
if err != nil {
err = extendErr("could not get "+fcid.String()+" lock: ", ErrorInternal(err.Error()))
return storageObligation{}, types.FileContractRevision{}, nil, err
}
defer func() {
if err != nil {
h.managedUnlockStorageObligation(fcid)
}
}()
// Fetch the storage obligation, which has the revision, which has the
// renter's public key.
h.mu.RLock()
defer h.mu.RUnlock()
err = h.db.View(func(tx *bolt.Tx) error {
so, err = getStorageObligation(tx, fcid)
return err
})
if err != nil {
err = extendErr("could not fetch "+fcid.String()+": ", ErrorInternal(err.Error()))
return storageObligation{}, types.FileContractRevision{}, nil, err
}
// Pull out the file contract revision and the revision's signatures from
// the transaction.
revisionTxn := so.RevisionTransactionSet[len(so.RevisionTransactionSet)-1]
recentRevision = revisionTxn.FileContractRevisions[0]
for _, sig := range revisionTxn.TransactionSignatures {
// Checking for just the parent id is sufficient, an over-signed file
// contract is invalid.
if sig.ParentID == crypto.Hash(fcid) {
revisionSigs = append(revisionSigs, sig)
}
}
// Verify that the challegne response matches the public key.
var renterPK crypto.PublicKey
// Sanity check - there should be two public keys.
if len(recentRevision.UnlockConditions.PublicKeys) != 2 {
// The error has to be set here so that the defered error check will
// unlock the storage obligation.
h.log.Critical("wrong public key count in file contract revision")
err = errRevisionWrongPublicKeyCount
err = extendErr("wrong public key count for "+fcid.String()+": ", ErrorInternal(err.Error()))
return storageObligation{}, types.FileContractRevision{}, nil, err
}
copy(renterPK[:], recentRevision.UnlockConditions.PublicKeys[0].Key)
err = crypto.VerifyHash(challenge, renterPK, challengeResponse)
if err != nil {
err = extendErr("bad signature from renter: ", ErrorCommunication(err.Error()))
return storageObligation{}, types.FileContractRevision{}, nil, err
}
return so, recentRevision, revisionSigs, nil
}