Example #1
0
// newRevision revises the current revision to incorporate new data.
func newRevision(rev types.FileContractRevision, pieceLen uint64, merkleRoot crypto.Hash, piecePrice types.Currency) types.FileContractRevision {
	// prevent a negative currency panic
	if piecePrice.Cmp(rev.NewValidProofOutputs[0].Value) > 0 {
		// probably not enough money, but the host might accept it anyway
		piecePrice = rev.NewValidProofOutputs[0].Value
	}
	return types.FileContractRevision{
		ParentID:          rev.ParentID,
		UnlockConditions:  rev.UnlockConditions,
		NewRevisionNumber: rev.NewRevisionNumber + 1,
		NewFileSize:       rev.NewFileSize + pieceLen,
		NewFileMerkleRoot: merkleRoot,
		NewWindowStart:    rev.NewWindowStart,
		NewWindowEnd:      rev.NewWindowEnd,
		NewValidProofOutputs: []types.SiacoinOutput{
			// less returned to renter
			{Value: rev.NewValidProofOutputs[0].Value.Sub(piecePrice), UnlockHash: rev.NewValidProofOutputs[0].UnlockHash},
			// more given to host
			{Value: rev.NewValidProofOutputs[1].Value.Add(piecePrice), UnlockHash: rev.NewValidProofOutputs[1].UnlockHash},
		},
		NewMissedProofOutputs: []types.SiacoinOutput{
			// less returned to renter
			{Value: rev.NewMissedProofOutputs[0].Value.Sub(piecePrice), UnlockHash: rev.NewMissedProofOutputs[0].UnlockHash},
			// more given to void
			{Value: rev.NewMissedProofOutputs[1].Value.Add(piecePrice), UnlockHash: rev.NewMissedProofOutputs[1].UnlockHash},
		},
		NewUnlockHash: rev.NewUnlockHash,
	}
}
Example #2
0
// Info returns generic information about the renter and the files that are
// being rented.
func (r *Renter) Info() (ri modules.RentInfo) {
	lockID := r.mu.RLock()
	defer r.mu.RUnlock(lockID)

	// Include the list of files the renter knows about.
	for filename := range r.files {
		ri.Files = append(ri.Files, filename)
	}

	// Calculate the average cost of a file.
	var totalPrice types.Currency
	redundancy := 6 // reasonable estimate until we come up with an alternative
	sampleSize := redundancy * 3 / 2
	hosts := r.hostDB.RandomHosts(sampleSize)
	for _, host := range hosts {
		totalPrice = totalPrice.Add(host.Price)
	}
	if len(hosts) == 0 {
		return
	}
	averagePrice := totalPrice.Mul(types.NewCurrency64(2)).Div(types.NewCurrency64(3))
	// HACK: 6000 is the duration (set by the API), and 1024^3 is a GB. Price
	// is reported as per GB, no timeframe is given.
	estimatedCost := averagePrice.Mul(types.NewCurrency64(6000)).Mul(types.NewCurrency64(1024 * 1024 * 1024))
	bufferedCost := estimatedCost.Mul(types.NewCurrency64(4)).Div(types.NewCurrency64(3))
	ri.Price = bufferedCost

	// Report the number of known hosts.
	ri.KnownHosts = len(r.hostDB.ActiveHosts())

	return
}
Example #3
0
// validSiacoins checks that the siacoin inputs and outputs are valid in the
// context of the current consensus set.
func validSiacoins(tx *bolt.Tx, t types.Transaction) error {
	scoBucket := tx.Bucket(SiacoinOutputs)
	var inputSum types.Currency
	for _, sci := range t.SiacoinInputs {
		// Check that the input spends an existing output.
		scoBytes := scoBucket.Get(sci.ParentID[:])
		if scoBytes == nil {
			return errMissingSiacoinOutput
		}

		// Check that the unlock conditions match the required unlock hash.
		var sco types.SiacoinOutput
		err := encoding.Unmarshal(scoBytes, &sco)
		if build.DEBUG && err != nil {
			panic(err)
		}
		if sci.UnlockConditions.UnlockHash() != sco.UnlockHash {
			return errWrongUnlockConditions
		}

		inputSum = inputSum.Add(sco.Value)
	}
	if inputSum.Cmp(t.SiacoinOutputSum()) != 0 {
		return errSiacoinInputOutputMismatch
	}
	return nil
}
Example #4
0
File: renter.go Project: mantyr/Sia
// Info returns generic information about the renter and the files that are
// being rented.
func (r *Renter) Info() (ri modules.RentInfo) {
	lockID := r.mu.RLock()
	// Include the list of files the renter knows about.
	for filename := range r.files {
		ri.Files = append(ri.Files, filename)
	}
	r.mu.RUnlock(lockID)

	// Calculate the average cost of a file.
	var totalPrice types.Currency
	sampleSize := defaultParityPieces + defaultDataPieces
	hosts := r.hostDB.RandomHosts(sampleSize)
	for _, host := range hosts {
		totalPrice = totalPrice.Add(host.Price)
	}
	if len(hosts) == 0 {
		return
	}
	averagePrice := totalPrice.Div(types.NewCurrency64(uint64(len(hosts))))
	estimatedCost := averagePrice.Mul(types.NewCurrency64(defaultDuration)).Mul(types.NewCurrency64(1e9)).Mul(types.NewCurrency64(defaultParityPieces + defaultDataPieces))
	// this also accounts for the buffering in the contract negotiation
	bufferedCost := estimatedCost.Mul(types.NewCurrency64(5)).Div(types.NewCurrency64(2))
	ri.Price = bufferedCost

	// Report the number of known hosts.
	ri.KnownHosts = len(r.hostDB.ActiveHosts())

	return
}
Example #5
0
File: outputs.go Project: mm3/Sia
// findOutputs returns a set of spendable outputs that add up to at least
// `amount` of coins, returning an error if it cannot. It also returns the
// `total`, which is the sum of all the outputs that were found, since it's
// unlikely that it will equal amount exaclty.
func (w *Wallet) findOutputs(amount types.Currency) (knownOutputs []*knownOutput, total types.Currency, err error) {
	if amount.IsZero() {
		err = errors.New("cannot fund amount <= 0")
		return
	}

	// Iterate through all outputs until enough coins have been assembled.
	for _, key := range w.keys {
		if !key.spendable {
			continue
		}
		for _, knownOutput := range key.outputs {
			if !knownOutput.spendable {
				continue
			}
			if knownOutput.age > w.age-AgeDelay {
				continue
			}
			total = total.Add(knownOutput.output.Value)
			knownOutputs = append(knownOutputs, knownOutput)

			if total.Cmp(amount) >= 0 {
				return
			}
		}
	}

	// This code will only be reached if total < amount, meaning insufficient
	// funds.
	err = modules.LowBalanceErr
	return
}
Example #6
0
// SendSiacoins creates a transaction sending 'amount' to 'dest'. The transaction
// is submitted to the transaction pool and is also returned.
func (w *Wallet) SendSiacoins(amount types.Currency, dest types.UnlockHash) ([]types.Transaction, error) {
	if err := w.tg.Add(); err != nil {
		return nil, err
	}
	defer w.tg.Done()

	tpoolFee := types.SiacoinPrecision.Mul64(10) // TODO: better fee algo.
	output := types.SiacoinOutput{
		Value:      amount,
		UnlockHash: dest,
	}

	txnBuilder := w.StartTransaction()
	err := txnBuilder.FundSiacoins(amount.Add(tpoolFee))
	if err != nil {
		return nil, err
	}
	txnBuilder.AddMinerFee(tpoolFee)
	txnBuilder.AddSiacoinOutput(output)
	txnSet, err := txnBuilder.Sign(true)
	if err != nil {
		return nil, err
	}
	err = w.tpool.AcceptTransactionSet(txnSet)
	if err != nil {
		return nil, err
	}
	return txnSet, nil
}
Example #7
0
// checkSiacoins counts the number of siacoins in the database and verifies
// that it matches the sum of all the coinbases.
func (cs *ConsensusSet) checkSiacoins() error {
	// Calculate the number of expected coins in constant time.
	deflationBlocks := types.InitialCoinbase - types.MinimumCoinbase
	expectedSiacoins := types.CalculateCoinbase(0).Add(types.CalculateCoinbase(cs.height())).Div(types.NewCurrency64(2))
	if cs.height() < types.BlockHeight(deflationBlocks) {
		expectedSiacoins = expectedSiacoins.Mul(types.NewCurrency64(uint64(cs.height()) + 1))
	} else {
		expectedSiacoins = expectedSiacoins.Mul(types.NewCurrency64(deflationBlocks + 1))
		trailingSiacoins := types.NewCurrency64(uint64(cs.height()) - deflationBlocks).Mul(types.CalculateCoinbase(cs.height()))
		expectedSiacoins = expectedSiacoins.Add(trailingSiacoins)
	}

	totalSiacoins := types.ZeroCurrency
	cs.db.forEachSiacoinOutputs(func(scoid types.SiacoinOutputID, sco types.SiacoinOutput) {
		totalSiacoins = totalSiacoins.Add(sco.Value)
	})
	cs.db.forEachFileContracts(func(fcid types.FileContractID, fc types.FileContract) {
		var payout types.Currency
		for _, output := range fc.ValidProofOutputs {
			payout = payout.Add(output.Value)
		}
		totalSiacoins = totalSiacoins.Add(payout)
	})
	cs.db.forEachDelayedSiacoinOutputs(func(v types.SiacoinOutputID, dso types.SiacoinOutput) {
		totalSiacoins = totalSiacoins.Add(dso.Value)
	})
	cs.db.forEachSiafundOutputs(func(sfoid types.SiafundOutputID, sfo types.SiafundOutput) {
		sfoSiacoins := cs.siafundPool.Sub(sfo.ClaimStart).Div(types.SiafundCount).Mul(sfo.Value)
		totalSiacoins = totalSiacoins.Add(sfoSiacoins)
	})
	if expectedSiacoins.Cmp(totalSiacoins) != 0 {
		return errSiacoinMiscount
	}
	return nil
}
Example #8
0
// maxSectors is the estimated maximum number of sectors that the allowance
// can support.
func maxSectors(a modules.Allowance, hdb hostDB) (uint64, error) {
	if a.Hosts == 0 || a.Period == 0 {
		return 0, errors.New("invalid allowance")
	}

	// Sample at least 10 hosts.
	nRandomHosts := int(a.Hosts)
	if nRandomHosts < 10 {
		nRandomHosts = 10
	}
	hosts := hdb.RandomHosts(nRandomHosts, nil)
	if len(hosts) < int(a.Hosts) {
		return 0, errors.New("not enough hosts")
	}

	// Calculate cost of storing 1 sector per host for the allowance period.
	var sum types.Currency
	for _, h := range hosts {
		sum = sum.Add(h.StoragePrice)
	}
	averagePrice := sum.Div64(uint64(len(hosts)))
	costPerSector := averagePrice.Mul64(a.Hosts).Mul64(modules.SectorSize).Mul64(uint64(a.Period))

	// Divide total funds by cost per sector.
	numSectors, err := a.Funds.Div(costPerSector).Uint64()
	if err != nil {
		// if there was an overflow, something is definitely wrong
		return 0, errors.New("allowance can fund suspiciously large number of sectors")
	}
	return numSectors, nil
}
Example #9
0
// checkMinerFees checks that the total amount of transaction fees in the
// transaction set is sufficient to earn a spot in the transaction pool.
func (tp *TransactionPool) checkMinerFees(ts []types.Transaction) error {
	// Transactions cannot be added after the TransactionPoolSizeLimit has been
	// hit.
	if tp.transactionListSize > TransactionPoolSizeLimit {
		return errFullTransactionPool
	}

	// The first TransactionPoolSizeForFee transactions do not need fees.
	if tp.transactionListSize > TransactionPoolSizeForFee {
		// Currently required fees are set on a per-transaction basis. 2 coins
		// are required per transaction if the free-fee limit has been reached,
		// adding a larger fee is not useful.
		var feeSum types.Currency
		for i := range ts {
			for _, fee := range ts[i].MinerFees {
				feeSum = feeSum.Add(fee)
			}
		}
		feeRequired := TransactionMinFee.Mul(types.NewCurrency64(uint64(len(ts))))
		if feeSum.Cmp(feeRequired) < 0 {
			return errLowMinerFees
		}
	}
	return nil
}
Example #10
0
// TestRPCUPload attempts to upload a file to the host, adding coverage to the
// upload function.
func TestRPCUpload(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	ht, err := newHostTester("TestRPCUpload")
	if err != nil {
		t.Fatal(err)
	}
	ht.host.mu.RLock()
	baselineAnticipatedRevenue := ht.host.anticipatedRevenue
	baselineSpace := ht.host.spaceRemaining
	ht.host.mu.RUnlock()
	_, err = ht.uploadFile("TestRPCUpload - 1", renewDisabled)
	if err != nil {
		t.Fatal(err)
	}

	var expectedRevenue types.Currency
	func() {
		ht.host.mu.RLock()
		defer ht.host.mu.RUnlock()

		if ht.host.anticipatedRevenue.Cmp(baselineAnticipatedRevenue) <= 0 {
			t.Error("Anticipated revenue did not increase after a file was uploaded")
		}
		if baselineSpace <= ht.host.spaceRemaining {
			t.Error("space remaining on the host does not seem to have decreased")
		}
		expectedRevenue = ht.host.anticipatedRevenue
	}()

	// Mine until the storage proof goes through, and the obligation gets
	// cleared.
	for i := types.BlockHeight(0); i <= testUploadDuration+confirmationRequirement+defaultWindowSize; i++ {
		_, err := ht.miner.AddBlock()
		if err != nil {
			t.Fatal(err)
		}
	}

	// Check that the storage proof has succeeded.
	ht.host.mu.Lock()
	defer ht.host.mu.Unlock()
	if len(ht.host.obligationsByID) != 0 {
		t.Error("host still has obligation, when it should have completed the obligation and submitted a storage proof.")
	}
	if !ht.host.anticipatedRevenue.IsZero() {
		t.Error("host anticipated revenue was not set back to zero")
	}
	if ht.host.spaceRemaining != baselineSpace {
		t.Error("host does not seem to have reclaimed the space after a successful obligation")
	}
	if expectedRevenue.Cmp(ht.host.revenue) != 0 {
		t.Error("host's revenue was not moved from anticipated to expected")
	}
}
Example #11
0
// CalculateFee returns the fee-per-byte of a transaction set.
func CalculateFee(ts []types.Transaction) types.Currency {
	var sum types.Currency
	for _, t := range ts {
		for _, fee := range t.MinerFees {
			sum = sum.Add(fee)
		}
	}
	size := len(encoding.Marshal(ts))
	return sum.Div64(uint64(size))
}
Example #12
0
// checkMinerPayouts compares a block's miner payouts to the block's subsidy and
// returns true if they are equal.
func checkMinerPayouts(b types.Block, height types.BlockHeight) bool {
	// Add up the payouts and check that all values are legal.
	var payoutSum types.Currency
	for _, payout := range b.MinerPayouts {
		if payout.Value.IsZero() {
			return false
		}
		payoutSum = payoutSum.Add(payout.Value)
	}
	return b.CalculateSubsidy(height).Cmp(payoutSum) == 0
}
Example #13
0
// AveragePrice returns the average price of a host.
func (hdb *HostDB) AveragePrice() types.Currency {
	// maybe a more sophisticated way of doing this
	var totalPrice types.Currency
	sampleSize := 18
	hosts := hdb.randomHosts(sampleSize, nil)
	if len(hosts) == 0 {
		return totalPrice
	}
	for _, host := range hosts {
		totalPrice = totalPrice.Add(host.Price)
	}
	return totalPrice.Div(types.NewCurrency64(uint64(len(hosts))))
}
Example #14
0
// currencyUnits converts a types.Currency to a string with human-readable
// units. The unit used will be the largest unit that results in a value
// greater than 1. The value is rounded to 4 significant digits.
func currencyUnits(c types.Currency) string {
	pico := types.SiacoinPrecision.Div64(1e12)
	if c.Cmp(pico) < 0 {
		return c.String() + " H"
	}

	// iterate until we find a unit greater than c
	mag := pico
	unit := ""
	for _, unit = range []string{"pS", "nS", "uS", "mS", "SC", "KS", "MS", "GS", "TS"} {
		if c.Cmp(mag.Mul64(1e3)) < 0 {
			break
		} else if unit != "TS" {
			// don't want to perform this multiply on the last iter; that
			// would give us 1.235 TS instead of 1235 TS
			mag = mag.Mul64(1e3)
		}
	}

	num := new(big.Rat).SetInt(c.Big())
	denom := new(big.Rat).SetInt(mag.Big())
	res, _ := new(big.Rat).Mul(num, denom.Inv(denom)).Float64()

	return fmt.Sprintf("%.4g %s", res, unit)
}
Example #15
0
File: valid.go Project: mm3/Sia
// validUnconfirmedSiafunds checks that all siafund inputs and outputs are
// valid within the context of the unconfirmed consensus set.
func (tp *TransactionPool) validUnconfirmedSiafunds(t types.Transaction) (err error) {
	var inputSum types.Currency
	for _, sfi := range t.SiafundInputs {
		// Check that the corresponding siafund output being spent exists.
		sfo, exists := tp.siafundOutputs[sfi.ParentID]
		if !exists {
			return errors.New("transaction spends unrecognized siafund output")
		}

		// Check that the unlock conditions match the unlock hash of the
		// corresponding output.
		if sfi.UnlockConditions.UnlockHash() != sfo.UnlockHash {
			return errors.New("transaction contains invalid unlock conditions (hash mismatch)")
		}

		// Add this input's value to the inputSum.
		inputSum = inputSum.Add(sfo.Value)
	}

	// Check that the value of the outputs equal the value of the inputs.
	var outputSum types.Currency
	for _, sfo := range t.SiafundOutputs {
		outputSum = outputSum.Add(sfo.Value)
	}
	if outputSum.Cmp(inputSum) != 0 {
		return errors.New("siafund inputs do not equal siafund outputs")
	}

	return
}
Example #16
0
// validSiafunds checks that the siafund portions of the transaction are valid
// in the context of the consensus set.
func (cs *ConsensusSet) validSiafunds(t types.Transaction) (err error) {
	// Compare the number of input siafunds to the output siafunds.
	var siafundInputSum types.Currency
	var siafundOutputSum types.Currency
	for _, sfi := range t.SiafundInputs {
		exists := cs.db.inSiafundOutputs(sfi.ParentID)
		if !exists {
			return ErrMissingSiafundOutput
		}
		sfo := cs.db.getSiafundOutputs(sfi.ParentID)

		// Check the unlock conditions match the unlock hash.
		if sfi.UnlockConditions.UnlockHash() != sfo.UnlockHash {
			return ErrWrongUnlockConditions
		}

		siafundInputSum = siafundInputSum.Add(sfo.Value)
	}
	for _, sfo := range t.SiafundOutputs {
		siafundOutputSum = siafundOutputSum.Add(sfo.Value)
	}
	if siafundOutputSum.Cmp(siafundInputSum) != 0 {
		return ErrSiafundInputOutputMismatch
	}
	return
}
Example #17
0
// nodeAtWeight grabs an element in the tree that appears at the given weight.
// Though the tree has an arbitrary sorting, a sufficiently random weight will
// pull a random element. The tree is searched through in a post-ordered way.
func (hn *hostNode) nodeAtWeight(weight types.Currency) (*hostNode, error) {
	// Sanity check - weight must be less than the total weight of the tree.
	if weight.Cmp(hn.weight) > 0 {
		return nil, errOverweight
	}

	// Check if the left or right child should be returned.
	if hn.left != nil {
		if weight.Cmp(hn.left.weight) < 0 {
			return hn.left.nodeAtWeight(weight)
		}
		weight = weight.Sub(hn.left.weight) // Search from 0th index of right side.
	}
	if hn.right != nil && weight.Cmp(hn.right.weight) < 0 {
		return hn.right.nodeAtWeight(weight)
	}

	// Sanity check
	if build.DEBUG && !hn.taken {
		build.Critical("nodeAtWeight should not be returning a nil entry")
	}

	// Return the root entry.
	return hn, nil
}
Example #18
0
// validSiafunds checks that the siafund portions of the transaction are valid
// in the context of the consensus set.
func validSiafunds(tx *bolt.Tx, t types.Transaction) (err error) {
	// Compare the number of input siafunds to the output siafunds.
	var siafundInputSum types.Currency
	var siafundOutputSum types.Currency
	for _, sfi := range t.SiafundInputs {
		sfo, err := getSiafundOutput(tx, sfi.ParentID)
		if err != nil {
			return err
		}

		// Check the unlock conditions match the unlock hash.
		if sfi.UnlockConditions.UnlockHash() != sfo.UnlockHash {
			return errWrongUnlockConditions
		}

		siafundInputSum = siafundInputSum.Add(sfo.Value)
	}
	for _, sfo := range t.SiafundOutputs {
		siafundOutputSum = siafundOutputSum.Add(sfo.Value)
	}
	if siafundOutputSum.Cmp(siafundInputSum) != 0 {
		return errSiafundInputOutputMismatch
	}
	return
}
Example #19
0
File: host.go Project: zzmjohn/Sia
// StoragePriceToHuman converts a consensus storage price, having the unit
// 'Hastings Per Block Per Byte', to a human storage price, having the unit
// 'Siacoins Per Month Per Terabyte'. An error is returned if the result would
// overflow a uint64. If the result is between 0 and 1, the value is rounded to
// the nearest value.
func StoragePriceToHuman(hastingsBlockByte types.Currency) (siacoinsMonthTB uint64, err error) {
	// Perform multiplication first to preserve precision.
	hastingsMonthByte := hastingsBlockByte.Mul(types.NewCurrency64(4320))
	hastingsMonthTB := hastingsMonthByte.Mul(types.NewCurrency64(1e12))
	if hastingsMonthTB.Cmp(types.SiacoinPrecision.Div(types.NewCurrency64(2))) < 0 {
		// The result of the final division is going to be less than 0.5,
		// therefore 0 should be returned.
		return 0, nil
	}
	if hastingsMonthTB.Cmp(types.SiacoinPrecision) < 0 {
		// The result of the final division is going to be greater than or
		// equal to 0.5, but less than 1, therefore 1 should be returned.
		return 1, nil
	}
	return hastingsMonthTB.Div(types.SiacoinPrecision).Uint64()
}
Example #20
0
// validFileContractRevision checks that each file contract revision is valid
// in the context of the current consensus set.
func (cs *ConsensusSet) validFileContractRevisions(t types.Transaction) (err error) {
	for _, fcr := range t.FileContractRevisions {
		// Check that the revision revises an existing contract.
		exists := cs.db.inFileContracts(fcr.ParentID)
		if !exists {
			return ErrUnrecognizedFileContractID
		}
		fc := cs.db.getFileContracts(fcr.ParentID)

		// Check that the height is less than fc.WindowStart - revisions are
		// not allowed to be submitted once the storage proof window has
		// opened.  This reduces complexity for unconfirmed transactions.
		if cs.height() > fc.WindowStart {
			return ErrLateRevision
		}

		// Check that the revision number of the revision is greater than the
		// revision number of the existing file contract.
		if fc.RevisionNumber >= fcr.NewRevisionNumber {
			return ErrLowRevisionNumber
		}

		// Check that the unlock conditions match the unlock hash.
		if fcr.UnlockConditions.UnlockHash() != fc.UnlockHash {
			return ErrWrongUnlockConditions
		}

		// Check that the payout of the revision matches the payout of the
		// original, and that the payouts match eachother.
		var validPayout, missedPayout types.Currency
		for _, output := range fcr.NewValidProofOutputs {
			validPayout = validPayout.Add(output.Value)
		}
		for _, output := range fcr.NewMissedProofOutputs {
			missedPayout = missedPayout.Add(output.Value)
		}
		if validPayout.Cmp(fc.Payout.Sub(fc.Tax())) != 0 {
			return ErrAlteredRevisionPayouts
		}
		if missedPayout.Cmp(fc.Payout.Sub(fc.Tax())) != 0 {
			return ErrAlteredRevisionPayouts
		}
	}

	return
}
Example #21
0
// checkWalletBalance looks at an upload and determines if there is enough
// money in the wallet to support such an upload. An error is returned if it is
// determined that there is not enough money.
func (r *Renter) checkWalletBalance(up modules.FileUploadParams) error {
	// Get the size of the file.
	fileInfo, err := os.Stat(up.Filename)
	if err != nil {
		return err
	}
	curSize := types.NewCurrency64(uint64(fileInfo.Size()))

	var averagePrice types.Currency
	sampleSize := up.ErasureCode.NumPieces() * 3 / 2
	hosts := r.hostDB.RandomHosts(sampleSize)
	for _, host := range hosts {
		averagePrice = averagePrice.Add(host.Price)
	}
	if len(hosts) == 0 {
		return errors.New("no hosts!")
	}
	averagePrice = averagePrice.Div(types.NewCurrency64(uint64(len(hosts))))
	estimatedCost := averagePrice.Mul(types.NewCurrency64(uint64(up.Duration))).Mul(curSize)
	bufferedCost := estimatedCost.Mul(types.NewCurrency64(2))

	siacoinBalance, _, _ := r.wallet.ConfirmedBalance()
	if bufferedCost.Cmp(siacoinBalance) > 0 {
		return errors.New("insufficient balance for upload")
	}
	return nil
}
Example #22
0
// checkSiafundCount checks that the number of siafunds countable within the
// consensus set equal the expected number of siafunds for the block height.
func checkSiafundCount(tx *bolt.Tx) {
	var total types.Currency
	err := tx.Bucket(SiafundOutputs).ForEach(func(_, siafundOutputBytes []byte) error {
		var sfo types.SiafundOutput
		err := encoding.Unmarshal(siafundOutputBytes, &sfo)
		if err != nil {
			manageErr(tx, err)
		}
		total = total.Add(sfo.Value)
		return nil
	})
	if err != nil {
		manageErr(tx, err)
	}
	if total.Cmp(types.SiafundCount) != 0 {
		manageErr(tx, errors.New("wrong number if siafunds in the consensus set"))
	}
}
Example #23
0
File: valid.go Project: mm3/Sia
// validUnconfirmedFileContractRevisions checks that all file contract
// revisions are valid within the context of the unconfirmed consensus set.
func (tp *TransactionPool) validUnconfirmedFileContractRevisions(t types.Transaction) (err error) {
	for _, fcr := range t.FileContractRevisions {
		// Check for the corresponding file contract in the unconfirmed set.
		fc, exists := tp.fileContracts[fcr.ParentID]
		if !exists {
			return errors.New("revision given for unrecognized file contract")
		}

		// Check that the revision was submitted before the storage proof
		// window opened.
		if tp.consensusSetHeight > fc.WindowStart {
			return errors.New("revision submitted too late")
		}

		// Check that the revision number is increasing as a result of the
		// revision.
		if fc.RevisionNumber >= fcr.NewRevisionNumber {
			return errors.New("contract revision is outdated")
		}

		// Check that the unlock conditions match the unlock hash of the
		// corresponding file contract.
		if fcr.UnlockConditions.UnlockHash() != fc.UnlockHash {
			return errors.New("unlock conditions do not meet required unlock hash")
		}

		// Check that the payouts in the revision add up to the payout of the
		// contract.
		var payout types.Currency
		for _, output := range fcr.NewMissedProofOutputs {
			payout = payout.Add(output.Value)
		}
		if payout.Cmp(fc.Payout) != 0 {
			return errors.New("contract revision has incorrect payouts")
		}
	}
	return
}
Example #24
0
// managedFormAllowanceContracts handles the special case where no contracts
// need to be renewed when setting the allowance.
func (c *Contractor) managedFormAllowanceContracts(n int, numSectors uint64, a modules.Allowance) error {
	if n <= 0 {
		return nil
	}

	// if we're forming contracts but not renewing, the new contracts should
	// have the same endHeight as the existing ones. Otherwise, the endHeight
	// should be a full period.
	c.mu.RLock()
	endHeight := c.blockHeight + a.Period
	if len(c.contracts) > 0 {
		endHeight = c.contractEndHeight()
	}
	c.mu.RUnlock()

	// form the contracts
	formed, err := c.managedFormContracts(n, numSectors, endHeight)
	if err != nil {
		return err
	}

	// Set the allowance and replace the contract set
	c.mu.Lock()
	c.allowance = a
	for _, contract := range formed {
		c.contracts[contract.ID] = contract
	}
	// update metrics
	var spending types.Currency
	for _, contract := range c.contracts {
		spending = spending.Add(contract.RenterFunds())
	}
	c.financialMetrics.ContractSpending = spending
	err = c.saveSync()
	c.mu.Unlock()

	return err
}
Example #25
0
File: valid.go Project: mm3/Sia
// validUnconfirmedSiacoins checks that all siacoin inputs and outputs are
// valid in the context of the unconfirmed consensus set.
func (tp *TransactionPool) validUnconfirmedSiacoins(t types.Transaction) (err error) {
	var inputSum types.Currency
	for _, sci := range t.SiacoinInputs {
		// All inputs must have corresponding outputs in the unconfirmed set.
		sco, exists := tp.siacoinOutputs[sci.ParentID]
		if !exists {
			return ErrUnrecognizedSiacoinInput
		}

		// The unlock conditions provided must match the unlock hash of the
		// corresponding output.
		if sci.UnlockConditions.UnlockHash() != sco.UnlockHash {
			return ErrBadUnlockConditions
		}

		inputSum = inputSum.Add(sco.Value)
	}

	// The sum of all inputs must equal the sum of all outputs.
	if inputSum.Cmp(t.SiacoinOutputSum()) != 0 {
		return ErrSiacoinOverspend
	}
	return
}
Example #26
0
File: wallet.go Project: mm3/Sia
// SendCoins creates a transaction sending 'amount' to 'dest'. The transaction
// is submitted to the transaction pool and is also returned.
func (w *Wallet) SendCoins(amount types.Currency, dest types.UnlockHash) (t types.Transaction, err error) {
	// Add a transaction fee of 10 siacoins.
	tpoolFee := types.NewCurrency64(10).Mul(types.SiacoinPrecision)

	// Create and send the transaction.
	output := types.SiacoinOutput{
		Value:      amount,
		UnlockHash: dest,
	}
	id, err := w.RegisterTransaction(t)
	if err != nil {
		return
	}
	_, err = w.FundTransaction(id, amount.Add(tpoolFee))
	if err != nil {
		return
	}
	_, _, err = w.AddMinerFee(id, tpoolFee)
	if err != nil {
		return
	}
	_, _, err = w.AddSiacoinOutput(id, output)
	if err != nil {
		return
	}
	t, err = w.SignTransaction(id, true)
	if err != nil {
		return
	}
	err = w.tpool.AcceptTransaction(t)
	if err != nil {
		return
	}

	return
}
Example #27
0
File: host.go Project: zoutaiqi/Sia
func (h *Host) Info() modules.HostInfo {
	lockID := h.mu.RLock()
	defer h.mu.RUnlock(lockID)

	info := modules.HostInfo{
		HostSettings: h.HostSettings,

		StorageRemaining: h.spaceRemaining,
		NumContracts:     len(h.obligationsByID),
		Profit:           h.profit,
	}
	// sum up the current obligations to calculate PotentialProfit
	for _, obligation := range h.obligationsByID {
		fc := obligation.FileContract
		info.PotentialProfit = info.PotentialProfit.Add(types.PostTax(h.blockHeight, fc.Payout))
	}

	// Calculate estimated competition (reported in per GB per month). Price
	// calculated by taking the average of hosts 8-15.
	var averagePrice types.Currency
	hosts := h.hostdb.RandomHosts(15)
	for i, host := range hosts {
		if i < 8 {
			continue
		}
		averagePrice = averagePrice.Add(host.Price)
	}
	if len(hosts) == 0 {
		return info
	}
	averagePrice = averagePrice.Div(types.NewCurrency64(uint64(len(hosts))))
	// HACK: 4320 is one month, and 1024^3 is a GB. Price is reported as per GB
	// per month.
	estimatedCost := averagePrice.Mul(types.NewCurrency64(4320)).Mul(types.NewCurrency64(1024 * 1024 * 1024))
	info.Competition = estimatedCost

	return info
}
Example #28
0
// managedRevisionIteration handles one iteration of the revision loop. As a
// performance optimization, multiple iterations of revisions are allowed to be
// made over the same connection.
func (h *Host) managedRevisionIteration(conn net.Conn, so *storageObligation, finalIter bool) error {
	// Send the settings to the renter. The host will keep going even if it is
	// not accepting contracts, because in this case the contract already
	// exists.
	err := h.managedRPCSettings(conn)
	if err != nil {
		return err
	}

	// Set the negotiation deadline.
	conn.SetDeadline(time.Now().Add(modules.NegotiateFileContractRevisionTime))

	// The renter will either accept or reject the settings + revision
	// transaction. It may also return a stop response to indicate that it
	// wishes to terminate the revision loop.
	err = modules.ReadNegotiationAcceptance(conn)
	if err != nil {
		return err
	}

	// Read some variables from the host for use later in the function.
	h.mu.RLock()
	settings := h.settings
	secretKey := h.secretKey
	blockHeight := h.blockHeight
	h.mu.RUnlock()

	// The renter is going to send its intended modifications, followed by the
	// file contract revision that pays for them.
	var modifications []modules.RevisionAction
	var revision types.FileContractRevision
	err = encoding.ReadObject(conn, &modifications, settings.MaxReviseBatchSize)
	if err != nil {
		return err
	}
	err = encoding.ReadObject(conn, &revision, modules.NegotiateMaxFileContractRevisionSize)
	if err != nil {
		return err
	}

	// First read all of the modifications. Then make the modifications, but
	// with the ability to reverse them. Then verify the file contract revision
	// correctly accounts for the changes.
	var bandwidthRevenue types.Currency // Upload bandwidth.
	var storageRevenue types.Currency
	var newCollateral types.Currency
	var sectorsRemoved []crypto.Hash
	var sectorsGained []crypto.Hash
	var gainedSectorData [][]byte
	err = func() error {
		for _, modification := range modifications {
			// Check that the index points to an existing sector root. If the type
			// is ActionInsert, we permit inserting at the end.
			if modification.Type == modules.ActionInsert {
				if modification.SectorIndex > uint64(len(so.SectorRoots)) {
					return errBadModificationIndex
				}
			} else if modification.SectorIndex >= uint64(len(so.SectorRoots)) {
				return errBadModificationIndex
			}
			// Check that the data sent for the sector is not too large.
			if uint64(len(modification.Data)) > modules.SectorSize {
				return errLargeSector
			}

			switch modification.Type {
			case modules.ActionDelete:
				// There is no financial information to change, it is enough to
				// remove the sector.
				sectorsRemoved = append(sectorsRemoved, so.SectorRoots[modification.SectorIndex])
				so.SectorRoots = append(so.SectorRoots[0:modification.SectorIndex], so.SectorRoots[modification.SectorIndex+1:]...)
			case modules.ActionInsert:
				// Check that the sector size is correct.
				if uint64(len(modification.Data)) != modules.SectorSize {
					return errBadSectorSize
				}

				// Update finances.
				blocksRemaining := so.proofDeadline() - blockHeight
				blockBytesCurrency := types.NewCurrency64(uint64(blocksRemaining)).Mul64(modules.SectorSize)
				bandwidthRevenue = bandwidthRevenue.Add(settings.MinUploadBandwidthPrice.Mul64(modules.SectorSize))
				storageRevenue = storageRevenue.Add(settings.MinStoragePrice.Mul(blockBytesCurrency))
				newCollateral = newCollateral.Add(settings.Collateral.Mul(blockBytesCurrency))

				// Insert the sector into the root list.
				newRoot := crypto.MerkleRoot(modification.Data)
				sectorsGained = append(sectorsGained, newRoot)
				gainedSectorData = append(gainedSectorData, modification.Data)
				so.SectorRoots = append(so.SectorRoots[:modification.SectorIndex], append([]crypto.Hash{newRoot}, so.SectorRoots[modification.SectorIndex:]...)...)
			case modules.ActionModify:
				// Check that the offset and length are okay. Length is already
				// known to be appropriately small, but the offset needs to be
				// checked for being appropriately small as well otherwise there is
				// a risk of overflow.
				if modification.Offset > modules.SectorSize || modification.Offset+uint64(len(modification.Data)) > modules.SectorSize {
					return errIllegalOffsetAndLength
				}

				// Get the data for the new sector.
				sector, err := h.ReadSector(so.SectorRoots[modification.SectorIndex])
				if err != nil {
					return err
				}
				copy(sector[modification.Offset:], modification.Data)

				// Update finances.
				bandwidthRevenue = bandwidthRevenue.Add(settings.MinUploadBandwidthPrice.Mul64(uint64(len(modification.Data))))

				// Update the sectors removed and gained to indicate that the old
				// sector has been replaced with a new sector.
				newRoot := crypto.MerkleRoot(sector)
				sectorsRemoved = append(sectorsRemoved, so.SectorRoots[modification.SectorIndex])
				sectorsGained = append(sectorsGained, newRoot)
				gainedSectorData = append(gainedSectorData, sector)
				so.SectorRoots[modification.SectorIndex] = newRoot
			default:
				return errUnknownModification
			}
		}
		newRevenue := storageRevenue.Add(bandwidthRevenue)
		return verifyRevision(so, revision, blockHeight, newRevenue, newCollateral)
	}()
	if err != nil {
		return modules.WriteNegotiationRejection(conn, err)
	}
	// Revision is acceptable, write an acceptance string.
	err = modules.WriteNegotiationAcceptance(conn)
	if err != nil {
		return err
	}

	// Renter will send a transaction signature for the file contract revision.
	var renterSig types.TransactionSignature
	err = encoding.ReadObject(conn, &renterSig, modules.NegotiateMaxTransactionSignatureSize)
	if err != nil {
		return err
	}
	// Verify that the signature is valid and get the host's signature.
	txn, err := createRevisionSignature(revision, renterSig, secretKey, blockHeight)
	if err != nil {
		return modules.WriteNegotiationRejection(conn, err)
	}

	so.PotentialStorageRevenue = so.PotentialStorageRevenue.Add(storageRevenue)
	so.RiskedCollateral = so.RiskedCollateral.Add(newCollateral)
	so.PotentialUploadRevenue = so.PotentialUploadRevenue.Add(bandwidthRevenue)
	so.RevisionTransactionSet = []types.Transaction{txn}
	err = h.modifyStorageObligation(so, sectorsRemoved, sectorsGained, gainedSectorData)
	if err != nil {
		return modules.WriteNegotiationRejection(conn, err)
	}

	// Host will now send acceptance and its signature to the renter. This
	// iteration is complete. If the finalIter flag is set, StopResponse will
	// be sent instead. This indicates to the renter that the host wishes to
	// terminate the revision loop.
	if finalIter {
		err = modules.WriteNegotiationStop(conn)
	} else {
		err = modules.WriteNegotiationAcceptance(conn)
	}
	if err != nil {
		return err
	}
	return encoding.WriteObject(conn, txn.TransactionSignatures[1])
}
Example #29
0
// validFileContractRevision checks that each file contract revision is valid
// in the context of the current consensus set.
func validFileContractRevisions(tx *bolt.Tx, t types.Transaction) error {
	for _, fcr := range t.FileContractRevisions {
		fc, err := getFileContract(tx, fcr.ParentID)
		if err != nil {
			return err
		}

		// Check that the height is less than fc.WindowStart - revisions are
		// not allowed to be submitted once the storage proof window has
		// opened.  This reduces complexity for unconfirmed transactions.
		if blockHeight(tx) > fc.WindowStart {
			return errLateRevision
		}

		// Check that the revision number of the revision is greater than the
		// revision number of the existing file contract.
		if fc.RevisionNumber >= fcr.NewRevisionNumber {
			return errLowRevisionNumber
		}

		// Check that the unlock conditions match the unlock hash.
		if fcr.UnlockConditions.UnlockHash() != fc.UnlockHash {
			return errWrongUnlockConditions
		}

		// Check that the payout of the revision matches the payout of the
		// original, and that the payouts match each other.
		var validPayout, missedPayout, oldPayout types.Currency
		for _, output := range fcr.NewValidProofOutputs {
			validPayout = validPayout.Add(output.Value)
		}
		for _, output := range fcr.NewMissedProofOutputs {
			missedPayout = missedPayout.Add(output.Value)
		}
		for _, output := range fc.ValidProofOutputs {
			oldPayout = oldPayout.Add(output.Value)
		}
		if validPayout.Cmp(oldPayout) != 0 {
			return errAlteredRevisionPayouts
		}
		if missedPayout.Cmp(oldPayout) != 0 {
			return errAlteredRevisionPayouts
		}
	}
	return nil
}
Example #30
0
// FundSiacoins will add a siacoin input of exaclty 'amount' to the
// transaction. A parent transaction may be needed to achieve an input with the
// correct value. The siacoin input will not be signed until 'Sign' is called
// on the transaction builder.
func (tb *transactionBuilder) FundSiacoins(amount types.Currency) error {
	tb.wallet.mu.Lock()
	defer tb.wallet.mu.Unlock()

	// Collect a value-sorted set of siacoin outputs.
	var so sortedOutputs
	for scoid, sco := range tb.wallet.siacoinOutputs {
		so.ids = append(so.ids, scoid)
		so.outputs = append(so.outputs, sco)
	}
	// Add all of the unconfirmed outputs as well.
	for _, upt := range tb.wallet.unconfirmedProcessedTransactions {
		for i, sco := range upt.Transaction.SiacoinOutputs {
			// Determine if the output belongs to the wallet.
			_, exists := tb.wallet.keys[sco.UnlockHash]
			if !exists {
				continue
			}
			so.ids = append(so.ids, upt.Transaction.SiacoinOutputID(uint64(i)))
			so.outputs = append(so.outputs, sco)
		}
	}
	sort.Sort(sort.Reverse(so))

	// Create and fund a parent transaction that will add the correct amount of
	// siacoins to the transaction.
	var fund types.Currency
	// potentialFund tracks the balance of the wallet including outputs that
	// have been spent in other unconfirmed transactions recently. This is to
	// provide the user with a more useful error message in the event that they
	// are overspending.
	var potentialFund types.Currency
	parentTxn := types.Transaction{}
	var spentScoids []types.SiacoinOutputID
	for i := range so.ids {
		scoid := so.ids[i]
		sco := so.outputs[i]
		// Check that this output has not recently been spent by the wallet.
		spendHeight := tb.wallet.spentOutputs[types.OutputID(scoid)]
		// Prevent an underflow error.
		allowedHeight := tb.wallet.consensusSetHeight - RespendTimeout
		if tb.wallet.consensusSetHeight < RespendTimeout {
			allowedHeight = 0
		}
		if spendHeight > allowedHeight {
			potentialFund = potentialFund.Add(sco.Value)
			continue
		}
		outputUnlockConditions := tb.wallet.keys[sco.UnlockHash].UnlockConditions
		if tb.wallet.consensusSetHeight < outputUnlockConditions.Timelock {
			continue
		}

		// Add a siacoin input for this output.
		sci := types.SiacoinInput{
			ParentID:         scoid,
			UnlockConditions: outputUnlockConditions,
		}
		parentTxn.SiacoinInputs = append(parentTxn.SiacoinInputs, sci)
		spentScoids = append(spentScoids, scoid)

		// Add the output to the total fund
		fund = fund.Add(sco.Value)
		potentialFund = potentialFund.Add(sco.Value)
		if fund.Cmp(amount) >= 0 {
			break
		}
	}
	if potentialFund.Cmp(amount) >= 0 && fund.Cmp(amount) < 0 {
		return modules.ErrPotentialDoubleSpend
	}
	if fund.Cmp(amount) < 0 {
		return modules.ErrLowBalance
	}

	// Create and add the output that will be used to fund the standard
	// transaction.
	parentUnlockConditions, err := tb.wallet.nextPrimarySeedAddress()
	if err != nil {
		return err
	}
	exactOutput := types.SiacoinOutput{
		Value:      amount,
		UnlockHash: parentUnlockConditions.UnlockHash(),
	}
	parentTxn.SiacoinOutputs = append(parentTxn.SiacoinOutputs, exactOutput)

	// Create a refund output if needed.
	if amount.Cmp(fund) != 0 {
		refundUnlockConditions, err := tb.wallet.nextPrimarySeedAddress()
		if err != nil {
			return err
		}
		refundOutput := types.SiacoinOutput{
			Value:      fund.Sub(amount),
			UnlockHash: refundUnlockConditions.UnlockHash(),
		}
		parentTxn.SiacoinOutputs = append(parentTxn.SiacoinOutputs, refundOutput)
	}

	// Sign all of the inputs to the parent trancstion.
	for _, sci := range parentTxn.SiacoinInputs {
		_, err := addSignatures(&parentTxn, types.FullCoveredFields, sci.UnlockConditions, crypto.Hash(sci.ParentID), tb.wallet.keys[sci.UnlockConditions.UnlockHash()])
		if err != nil {
			return err
		}
	}
	// Mark the parent output as spent. Must be done after the transaction is
	// finished because otherwise the txid and output id will change.
	tb.wallet.spentOutputs[types.OutputID(parentTxn.SiacoinOutputID(0))] = tb.wallet.consensusSetHeight

	// Add the exact output.
	newInput := types.SiacoinInput{
		ParentID:         parentTxn.SiacoinOutputID(0),
		UnlockConditions: parentUnlockConditions,
	}
	tb.newParents = append(tb.newParents, len(tb.parents))
	tb.parents = append(tb.parents, parentTxn)
	tb.siacoinInputs = append(tb.siacoinInputs, len(tb.transaction.SiacoinInputs))
	tb.transaction.SiacoinInputs = append(tb.transaction.SiacoinInputs, newInput)

	// Mark all outputs that were spent as spent.
	for _, scoid := range spentScoids {
		tb.wallet.spentOutputs[types.OutputID(scoid)] = tb.wallet.consensusSetHeight
	}
	return nil
}