Пример #1
0
// SignTransaction signs the transaction, then deletes the transaction from the
// wallet's internal memory, then returns the transaction.
func (w *Wallet) SignTransaction(id string, wholeTransaction bool) (txn types.Transaction, err error) {
	counter := w.mu.Lock()
	defer w.mu.Unlock(counter)

	// Fetch the transaction.
	openTxn, exists := w.transactions[id]
	if !exists {
		err = ErrInvalidID
		return
	}
	txn = *openTxn.transaction

	// Get the coveredfields struct.
	var coveredFields types.CoveredFields
	if wholeTransaction {
		coveredFields = types.CoveredFields{WholeTransaction: true}
	} else {
		for i := range txn.MinerFees {
			coveredFields.MinerFees = append(coveredFields.MinerFees, uint64(i))
		}
		for i := range txn.SiacoinInputs {
			coveredFields.SiacoinInputs = append(coveredFields.SiacoinInputs, uint64(i))
		}
		for i := range txn.SiacoinOutputs {
			coveredFields.SiacoinOutputs = append(coveredFields.SiacoinOutputs, uint64(i))
		}
		for i := range txn.FileContracts {
			coveredFields.FileContracts = append(coveredFields.FileContracts, uint64(i))
		}
		for i := range txn.StorageProofs {
			coveredFields.StorageProofs = append(coveredFields.StorageProofs, uint64(i))
		}
		for i := range txn.ArbitraryData {
			coveredFields.ArbitraryData = append(coveredFields.ArbitraryData, uint64(i))
		}
		for i := range txn.TransactionSignatures {
			coveredFields.TransactionSignatures = append(coveredFields.TransactionSignatures, uint64(i))
		}
	}

	// For each input in the transaction that we added, provide a signature.
	for _, inputIndex := range openTxn.inputs {
		input := txn.SiacoinInputs[inputIndex]
		sig := types.TransactionSignature{
			ParentID:       crypto.Hash(input.ParentID),
			CoveredFields:  coveredFields,
			PublicKeyIndex: 0,
		}
		txn.TransactionSignatures = append(txn.TransactionSignatures, sig)

		// Hash the transaction according to the covered fields.
		coinAddress := input.UnlockConditions.UnlockHash()
		sigIndex := len(txn.TransactionSignatures) - 1
		secKey := w.keys[coinAddress].secretKey
		sigHash := txn.SigHash(sigIndex)

		// Get the signature.
		var encodedSig crypto.Signature
		encodedSig, err = crypto.SignHash(sigHash, secKey)
		if err != nil {
			return
		}
		txn.TransactionSignatures[sigIndex].Signature = types.Signature(encodedSig[:])
	}

	// Delete the open transaction.
	delete(w.transactions, id)

	return
}
Пример #2
0
// Sign will sign any inputs added by 'FundSiacoins' or 'FundSiafunds' and
// return a transaction set that contains all parents prepended to the
// transaction. If more fields need to be added, a new transaction builder will
// need to be created.
//
// If the whole transaction flag is set to true, then the whole transaction
// flag will be set in the covered fields object. If the whole transaction flag
// is set to false, then the covered fields object will cover all fields that
// have already been added to the transaction, but will also leave room for
// more fields to be added.
//
// Sign should not be called more than once. If, for some reason, there is an
// error while calling Sign, the builder should be dropped.
func (tb *transactionBuilder) Sign(wholeTransaction bool) ([]types.Transaction, error) {
	if tb.signed {
		return nil, errBuilderAlreadySigned
	}

	// Create the coveredfields struct.
	var coveredFields types.CoveredFields
	if wholeTransaction {
		coveredFields = types.CoveredFields{WholeTransaction: true}
	} else {
		for i := range tb.transaction.MinerFees {
			coveredFields.MinerFees = append(coveredFields.MinerFees, uint64(i))
		}
		for i := range tb.transaction.SiacoinInputs {
			coveredFields.SiacoinInputs = append(coveredFields.SiacoinInputs, uint64(i))
		}
		for i := range tb.transaction.SiacoinOutputs {
			coveredFields.SiacoinOutputs = append(coveredFields.SiacoinOutputs, uint64(i))
		}
		for i := range tb.transaction.FileContracts {
			coveredFields.FileContracts = append(coveredFields.FileContracts, uint64(i))
		}
		for i := range tb.transaction.FileContractRevisions {
			coveredFields.FileContractRevisions = append(coveredFields.FileContractRevisions, uint64(i))
		}
		for i := range tb.transaction.StorageProofs {
			coveredFields.StorageProofs = append(coveredFields.StorageProofs, uint64(i))
		}
		for i := range tb.transaction.SiafundInputs {
			coveredFields.SiafundInputs = append(coveredFields.SiafundInputs, uint64(i))
		}
		for i := range tb.transaction.SiafundOutputs {
			coveredFields.SiafundOutputs = append(coveredFields.SiafundOutputs, uint64(i))
		}
		for i := range tb.transaction.ArbitraryData {
			coveredFields.ArbitraryData = append(coveredFields.ArbitraryData, uint64(i))
		}
	}
	// TransactionSignatures don't get covered by the 'WholeTransaction' flag,
	// and must be covered manually.
	for i := range tb.transaction.TransactionSignatures {
		coveredFields.TransactionSignatures = append(coveredFields.TransactionSignatures, uint64(i))
	}

	// For each siacoin input in the transaction that we added, provide a
	// signature.
	tb.wallet.mu.Lock()
	defer tb.wallet.mu.Unlock()
	for _, inputIndex := range tb.siacoinInputs {
		input := tb.transaction.SiacoinInputs[inputIndex]
		key := tb.wallet.keys[input.UnlockConditions.UnlockHash()]
		newSigIndices, err := addSignatures(&tb.transaction, coveredFields, input.UnlockConditions, crypto.Hash(input.ParentID), key)
		if err != nil {
			return nil, err
		}
		tb.transactionSignatures = append(tb.transactionSignatures, newSigIndices...)
		tb.signed = true // Signed is set to true after one successful signature to indicate that future signings can cause issues.
	}
	for _, inputIndex := range tb.siafundInputs {
		input := tb.transaction.SiafundInputs[inputIndex]
		key := tb.wallet.keys[input.UnlockConditions.UnlockHash()]
		newSigIndices, err := addSignatures(&tb.transaction, coveredFields, input.UnlockConditions, crypto.Hash(input.ParentID), key)
		if err != nil {
			return nil, err
		}
		tb.transactionSignatures = append(tb.transactionSignatures, newSigIndices...)
		tb.signed = true // Signed is set to true after one successful signature to indicate that future signings can cause issues.
	}

	// Get the transaction set and delete the transaction from the registry.
	txnSet := append(tb.parents, tb.transaction)
	return txnSet, nil
}
Пример #3
0
// Sign will sign any inputs added by 'FundSiacoins' or 'FundSiafunds' and
// return a transaction set that contains all parents prepended to the
// transaction. If more fields need to be added, a new transaction builder will
// need to be created.
//
// If the whole transaction flag  is set to true, then the whole transaction
// flag will be set in the covered fields object. If the whole transaction flag
// is set to false, then the covered fields object will cover all fields that
// have already been added to the transaction, but will also leave room for
// more fields to be added.
func (tb *transactionBuilder) Sign(wholeTransaction bool) ([]types.Transaction, error) {
	// Create the coveredfields struct.
	txn := tb.transaction
	var coveredFields types.CoveredFields
	if wholeTransaction {
		coveredFields = types.CoveredFields{WholeTransaction: true}
	} else {
		for i := range txn.MinerFees {
			coveredFields.MinerFees = append(coveredFields.MinerFees, uint64(i))
		}
		for i := range txn.SiacoinInputs {
			coveredFields.SiacoinInputs = append(coveredFields.SiacoinInputs, uint64(i))
		}
		for i := range txn.SiacoinOutputs {
			coveredFields.SiacoinOutputs = append(coveredFields.SiacoinOutputs, uint64(i))
		}
		for i := range txn.FileContracts {
			coveredFields.FileContracts = append(coveredFields.FileContracts, uint64(i))
		}
		for i := range txn.FileContractRevisions {
			coveredFields.FileContractRevisions = append(coveredFields.FileContractRevisions, uint64(i))
		}
		for i := range txn.StorageProofs {
			coveredFields.StorageProofs = append(coveredFields.StorageProofs, uint64(i))
		}
		for i := range txn.SiafundInputs {
			coveredFields.SiafundInputs = append(coveredFields.SiafundInputs, uint64(i))
		}
		for i := range txn.SiafundOutputs {
			coveredFields.SiafundOutputs = append(coveredFields.SiafundOutputs, uint64(i))
		}
		for i := range txn.ArbitraryData {
			coveredFields.ArbitraryData = append(coveredFields.ArbitraryData, uint64(i))
		}
	}
	// TransactionSignatures don't get covered by the 'WholeTransaction' flag,
	// and must be covered manually.
	for i := range txn.TransactionSignatures {
		coveredFields.TransactionSignatures = append(coveredFields.TransactionSignatures, uint64(i))
	}

	// For each siacoin input in the transaction that we added, provide a
	// signature.
	lockID := tb.wallet.mu.Lock()
	defer tb.wallet.mu.Unlock(lockID)
	for _, inputIndex := range tb.siacoinInputs {
		input := txn.SiacoinInputs[inputIndex]
		key := tb.wallet.keys[input.UnlockConditions.UnlockHash()]
		err := addSignatures(&txn, coveredFields, input.UnlockConditions, crypto.Hash(input.ParentID), key)
		if err != nil {
			return nil, err
		}
	}
	for _, inputIndex := range tb.siafundInputs {
		input := txn.SiafundInputs[inputIndex]
		key := tb.wallet.keys[input.UnlockConditions.UnlockHash()]
		err := addSignatures(&txn, coveredFields, input.UnlockConditions, crypto.Hash(input.ParentID), key)
		if err != nil {
			return nil, err
		}
	}

	// Get the transaction set and delete the transaction from the registry.
	txnSet := append(tb.parents, txn)
	return txnSet, nil
}