func (b *FBlock) MarshalTrans() ([]byte, error) {
var out bytes.Buffer
var periodMark = 0
var i int
var trans fct.ITransaction
for i, trans = range b.Transactions {
for periodMark < len(b.endOfPeriod) &&
b.endOfPeriod[periodMark] > 0 && // Ignore if markers are not set
i == b.endOfPeriod[periodMark] {
out.WriteByte(fct.MARKER)
periodMark++
}
data, err := trans.MarshalBinary()
if err != nil {
return nil, err
}
out.Write(data)
if err != nil {
return nil, err
}
}
for periodMark < len(b.endOfPeriod) {
out.WriteByte(fct.MARKER)
periodMark++
}
return out.Bytes(), nil
}
func FactoidAddOutput(trans fct.ITransaction, key string, address fct.IAddress, amount uint64) error {
ok := Utility.IsValidKey(key)
if !ok {
return fmt.Errorf("Invalid name for transaction")
}
// First look if this is really an update
for _, output := range trans.GetOutputs() {
if output.GetAddress().IsSameAs(address) {
output.SetAmount(amount)
return nil
}
}
// Add our new Output
err := factoidState.GetWallet().AddOutput(trans, address, uint64(amount))
if err != nil {
return fmt.Errorf("Failed to add output")
}
// Update our map with our new transaction to the same key. Otherwise, all
// of our work will go away!
factoidState.GetDB().PutRaw([]byte(fct.DB_BUILD_TRANS), []byte(key), trans)
return nil
}
func HandleGetFee(ctx *web.Context, k string) {
var trans fct.ITransaction
var err error
key := ctx.Params["key"]
fmt.Println("getfee", key)
if len(key) > 0 {
trans, err = getTransaction(ctx, key)
if err != nil {
reportResults(ctx, "Failure to locate the transaction", false)
return
}
}
fee, err := Wallet.GetFee()
if err != nil {
reportResults(ctx, err.Error(), false)
return
}
if trans != nil {
ufee, _ := trans.CalculateFee(uint64(fee))
fee = int64(ufee)
}
reportResults(ctx, fmt.Sprintf("%s", strings.TrimSpace(fct.ConvertDecimal(uint64(fee)))), true)
}
func (w *SCWallet) AddECOutput(trans fct.ITransaction, address fct.IAddress, amount uint64) error {
_, adr, err := w.getWalletEntry([]byte(fct.W_RCD_ADDRESS_HASH), address)
if err != nil {
adr = address
}
trans.AddECOutput(fct.CreateAddress(adr), amount)
return nil
}
func FactoidAddFee(trans fct.ITransaction, key string, address fct.IAddress, name string) (uint64, error) {
{
ins, err := trans.TotalInputs()
if err != nil {
return 0, err
}
outs, err := trans.TotalOutputs()
if err != nil {
return 0, err
}
ecs, err := trans.TotalECs()
if err != nil {
return 0, err
}
if ins != outs+ecs {
return 0, fmt.Errorf("Inputs and outputs don't add up")
}
}
ok := Utility.IsValidKey(key)
if !ok {
return 0, fmt.Errorf("Invalid name for transaction")
}
fee, err := GetFee()
if err != nil {
return 0, err
}
transfee, err := trans.CalculateFee(uint64(fee))
if err != nil {
return 0, err
}
adr, err := factoidState.GetWallet().GetAddressHash(address)
if err != nil {
return 0, err
}
for _, input := range trans.GetInputs() {
if input.GetAddress().IsSameAs(adr) {
amt, err := fct.ValidateAmounts(input.GetAmount(), transfee)
if err != nil {
return 0, err
}
input.SetAmount(amt)
return transfee, nil
}
}
return 0, fmt.Errorf("%s is not an input to the transaction.", key)
}
func (w *SCWallet) SignInputs(trans fct.ITransaction) (bool, error) {
data, err := trans.MarshalBinarySig() // Get the part of the transaction we sign
if err != nil {
return false, err
}
var numSigs int = 0
inputs := trans.GetInputs()
rcds := trans.GetRCDs()
for i, rcd := range rcds {
rcd1, ok := rcd.(*fct.RCD_1)
if ok {
pub := rcd1.GetPublicKey()
we := w.db.GetRaw([]byte(fct.W_ADDRESS_PUB_KEY), pub).(*WalletEntry)
if we != nil {
var pri [fct.SIGNATURE_LENGTH]byte
copy(pri[:], we.private[0])
bsig := ed25519.Sign(&pri, data)
sig := new(fct.Signature)
sig.SetSignature(bsig[:])
sigblk := new(fct.SignatureBlock)
sigblk.AddSignature(sig)
trans.SetSignatureBlock(i, sigblk)
numSigs += 1
}
}
}
return numSigs == len(inputs), nil
}
// FactoidSubmit assumes the caller has already validated and signed
// the transaction. No checking is done, it is just submitted to Factom.
func FactoidSubmit(trans fct.ITransaction) (err error) {
var data []byte
if data, err = trans.MarshalBinary(); err != nil {
return err
}
transdata := string(hex.EncodeToString(data))
s := struct{ Transaction string }{transdata}
var js []byte
if js, err = json.Marshal(s); err != nil {
return err
}
resp, err := http.Post(
fmt.Sprintf("http://%s/v1/factoid-submit/", ipaddressFD+portNumberFD),
"application/json",
bytes.NewBuffer(js))
if err != nil {
return err
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
resp.Body.Close()
type rtnStruct struct {
Response string
Success bool
}
rtn := new(rtnStruct)
if err := json.Unmarshal(body, rtn); err != nil {
return err
}
if !rtn.Success {
return fmt.Errorf(rtn.Response)
}
return nil
}
// Checks the transaction timestamp for validity in being included in the current block.
// No node has any responsiblity to forward on transactions that do not fall within
// the timeframe around a block defined by TRANSACTION_PRIOR_LIMIT and TRANSACTION_POST_LIMIT
func (fs *FactoidState) ValidateTransactionAge(trans fct.ITransaction) error {
tsblk := fs.GetCurrentBlock().GetCoinbaseTimestamp()
if tsblk < 0 {
return fmt.Errorf("Block has no coinbase transaction at this time")
}
tstrans := int64(trans.GetMilliTimestamp())
if tsblk-tstrans > fct.TRANSACTION_PRIOR_LIMIT {
return fmt.Errorf("Transaction is too old to be included in the current block")
}
if tstrans-tsblk > fct.TRANSACTION_POST_LIMIT {
return fmt.Errorf("Transaction is dated too far in the future to be included in the current block")
}
return nil
}
// Assumes validation has already been done.
func (fs *AssetState) UpdateTransaction(trans fct.ITransaction) error {
for _, input := range trans.GetInputs() {
fs.UpdateBalance(input.GetAddress(), -int64(input.GetAmount()))
}
for _, output := range trans.GetOutputs() {
fs.UpdateBalance(output.GetAddress(), int64(output.GetAmount()))
}
fs.numTransactions++
cp.CP.AddUpdate(
"transprocessed", // tag
"status", // Category
fmt.Sprintf("Factoid Transactions Processed: %d", fs.numTransactions), // Title
"", // Message
0) // When to expire the message; 0 is never
return nil
}
// Returns an error message about what is wrong with the transaction if it is
// invalid, otherwise you are good to go.
func (fs *FactoidState) Validate(index int, trans fct.ITransaction) error {
err := fs.currentBlock.ValidateTransaction(index, trans)
if err != nil {
return err
}
var sums = make(map[[32]byte]uint64, 10) // Look at the sum of an address's inputs
for _, input := range trans.GetInputs() { // to a transaction.
bal, err := fct.ValidateAmounts(sums[input.GetAddress().Fixed()], input.GetAmount())
if err != nil {
return err
}
if bal > fs.GetBalance(input.GetAddress()) {
return fmt.Errorf("Not enough funds in input addresses for the transaction")
}
sums[input.GetAddress().Fixed()] = bal
}
return nil
}
func (w *SCWallet) UpdateInput(trans fct.ITransaction, index int, address fct.IAddress, amount uint64) error {
we, adr, err := w.getWalletEntry([]byte(fct.W_RCD_ADDRESS_HASH), address)
if err != nil {
return err
}
in, err := trans.GetInput(index)
if err != nil {
return err
}
trans.GetRCDs()[index] = we.GetRCD() // The RCD must match the (possibly) new input
in.SetAddress(adr)
in.SetAmount(amount)
return nil
}
// Returns an error message about what is wrong with the transaction if it is
// invalid, otherwise you are good to go.
func (fs *AssetState) Validate(trans fct.ITransaction) error {
if err := trans.ValidateSignatures(); err != nil {
return err
}
var sums = make(map[fct.IAddress]uint64, 10)
for _, input := range trans.GetInputs() {
bal, err := fct.ValidateAmounts(
sums[input.GetAddress()], // Will be zero the first time around
input.GetAmount()) // Get this amount, check against bounds
if err != nil {
return err
}
if bal > fs.GetBalance(input.GetAddress()) {
return fmt.Errorf("Not enough funds in input addresses for the transaction")
}
sums[input.GetAddress()] = bal
}
return nil
}
func (w *SCWallet) AddInput(trans fct.ITransaction, address fct.IAddress, amount uint64) error {
// Check if this is an address we know.
we, adr, err := w.getWalletEntry([]byte(fct.W_RCD_ADDRESS_HASH), address)
// If it isn't, we assume the user knows what they are doing.
if we == nil || err != nil {
rcd := fct.NewRCD_1(address.Bytes())
trans.AddRCD(rcd)
adr, err := rcd.GetAddress()
if err != nil {
return err
}
trans.AddInput(fct.CreateAddress(adr), amount)
} else {
trans.AddRCD(we.GetRCD())
trans.AddInput(fct.CreateAddress(adr), amount)
}
return nil
}
func PrtTrans(t fct.ITransaction) {
fmt.Println("Transaction")
for _, input := range t.GetInputs() {
fmt.Println("in ", input.GetAddress(), input.GetAmount(), fs.GetBalance(input.GetAddress()))
}
for _, output := range t.GetOutputs() {
fmt.Println("out", output.GetAddress(), output.GetAmount(), fs.GetBalance(output.GetAddress()))
}
for _, ecoutput := range t.GetECOutputs() {
fmt.Println("ec ", ecoutput.GetAddress(), ecoutput.GetAmount(), fs.GetECBalance(ecoutput.GetAddress()))
}
}
func isReasonableFee(trans fct.ITransaction) error {
feeRate, getErr := GetFee()
if getErr != nil {
return getErr
}
reqFee, err := trans.CalculateFee(uint64(feeRate))
if err != nil {
return err
}
sreqFee := int64(reqFee)
tin, err := trans.TotalInputs()
if err != nil {
return err
}
tout, err := trans.TotalOutputs()
if err != nil {
return err
}
tec, err := trans.TotalECs()
if err != nil {
return err
}
cfee := int64(tin) - int64(tout) - int64(tec)
if cfee >= (sreqFee * 10) {
return fmt.Errorf("Unbalanced transaction (fee too high). Fee should be less than 10x the required fee.")
}
if cfee < sreqFee {
return fmt.Errorf("Insufficient fee")
}
return nil
}
// Add the first transaction of a block. This transaction makes the
// payout to the servers, so it has no inputs. This transaction must
// be deterministic so that all servers will know and expect its output.
func (b *FBlock) AddCoinbase(trans fct.ITransaction) error {
b.BodyMR = nil
if len(b.Transactions) != 0 {
return fmt.Errorf("The coinbase transaction must be the first transaction")
}
if len(trans.GetInputs()) != 0 {
return fmt.Errorf("The coinbase transaction cannot have any inputs")
}
if len(trans.GetECOutputs()) != 0 {
return fmt.Errorf("The coinbase transaction cannot buy Entry Credits")
}
if len(trans.GetRCDs()) != 0 {
return fmt.Errorf("The coinbase transaction cannot have anyRCD blocks")
}
if len(trans.GetSignatureBlocks()) != 0 {
return fmt.Errorf("The coinbase transaction is not signed")
}
// TODO Add check here for the proper payouts.
b.Transactions = append(b.Transactions, trans)
return nil
}
func (w *SCWallet) SignInputs(trans fct.ITransaction) (bool, error) {
data, err := trans.MarshalBinarySig() // Get the part of the transaction we sign
if err != nil {
return false, err
}
var errMsg []byte
rcds := trans.GetRCDs()
for i, rcd := range rcds {
rcd1, ok := rcd.(*fct.RCD_1)
if ok {
pub := rcd1.GetPublicKey()
we, ok := w.db.GetRaw([]byte(fct.W_ADDRESS_PUB_KEY), pub).(*WalletEntry)
if ok {
var pri [fct.SIGNATURE_LENGTH]byte
copy(pri[:], we.private[0])
bsig := ed25519.Sign(&pri, data)
sig := new(fct.Signature)
sig.SetSignature(bsig[:])
sigblk := new(fct.SignatureBlock)
sigblk.AddSignature(sig)
trans.SetSignatureBlock(i, sigblk)
} else {
errMsg = append(errMsg,
[]byte("Do not have the private key for: "+
fct.ConvertFctAddressToUserStr(fct.NewAddress(pub))+"\n")...)
}
}
}
if errMsg != nil {
return false, fmt.Errorf("%s", string(errMsg))
}
return true, nil
}
func (b FBlock) ValidateTransaction(index int, trans fct.ITransaction) error {
// Calculate the fee due.
{
err := trans.Validate(index)
if err != nil {
return err
}
}
//Ignore coinbase transaction's signatures
if len(b.Transactions) > 0 {
err := trans.ValidateSignatures()
if err != nil {
return err
}
}
fee, err := trans.CalculateFee(b.ExchRate)
if err != nil {
return err
}
tin, err := trans.TotalInputs()
if err != nil {
return err
}
tout, err := trans.TotalOutputs()
if err != nil {
return err
}
tec, err := trans.TotalECs()
if err != nil {
return err
}
sum, err := fct.ValidateAmounts(tout, tec, fee)
if err != nil {
return err
}
if tin < sum {
return fmt.Errorf("The inputs %s do not cover the outputs %s,\n"+
"the Entry Credit outputs %s, and the required fee %s",
strings.TrimSpace(fct.ConvertDecimal(tin)),
strings.TrimSpace(fct.ConvertDecimal(tout)),
strings.TrimSpace(fct.ConvertDecimal(tec)),
strings.TrimSpace(fct.ConvertDecimal(fee)))
}
return nil
}
func filtertransaction(trans fct.ITransaction, addresses [][]byte) bool {
if addresses == nil || len(addresses) == 0 {
return true
}
if len(trans.GetInputs()) == 0 &&
len(trans.GetOutputs()) == 0 {
return false
}
if len(addresses) == 1 && bytes.Equal(addresses[0], trans.GetSigHash().Bytes()) {
return true
}
Search:
for _, adr := range addresses {
for _, in := range trans.GetInputs() {
if bytes.Equal(adr, in.GetAddress().Bytes()) {
continue Search
}
}
for _, out := range trans.GetOutputs() {
if bytes.Equal(adr, out.GetAddress().Bytes()) {
continue Search
}
}
for _, ec := range trans.GetECOutputs() {
if bytes.Equal(adr, ec.GetAddress().Bytes()) {
continue Search
}
}
return false
}
return true
}
func (w *SCWallet) ValidateSignatures(trans fct.ITransaction) error {
if trans == nil {
return fmt.Errorf("Missing Transaction")
}
return trans.ValidateSignatures()
}
func (w *SCWallet) Validate(index int, trans fct.ITransaction) error {
err := trans.Validate(index)
return err
}
