// Computes the total balance for a cipher.Address's coin.UxOuts
func (self *Visor) balance(uxs coin.UxArray) wallet.Balance {
prevTime := self.blockchain.Time()
b := wallet.NewBalance(0, 0)
for _, ux := range uxs {
b = b.Add(wallet.NewBalance(ux.Body.Coins, ux.CoinHours(prevTime)))
}
return b
}
// Computes the total balance for cipher.Addresses and their coin.UxOuts
func (self *Visor) totalBalance(auxs coin.AddressUxOuts) wallet.Balance {
prevTime := self.blockchain.Time()
b := wallet.NewBalance(0, 0)
for _, uxs := range auxs {
for _, ux := range uxs {
b = b.Add(wallet.NewBalance(ux.Body.Coins, ux.CoinHours(prevTime)))
}
}
return b
}
// Creates and broadcasts a transaction sending money from one of our wallets
// to destination address.
func walletSpendHandler(gateway *daemon.Gateway) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
//log.Printf("Spend1")
if r.FormValue("id") == "" {
Error400(w, "Missing wallet_id")
return
}
walletId := wallet.WalletID(r.FormValue("id"))
if walletId == "" {
Error400(w, "Invalid Wallet Id")
return
}
sdst := r.FormValue("dst")
if sdst == "" {
Error400(w, "Missing destination address \"dst\"")
return
}
dst, err := cipher.DecodeBase58Address(sdst)
if err != nil {
//Error400(w, "Invalid destination address: %v", err)
Error400(w, "Invalid destination address: %v", err.Error())
return
}
//set fee automatically for now
/*
sfee := r.FormValue("fee")
fee, err := strconv.ParseUint(sfee, 10, 64)
if err != nil {
Error400(w, "Invalid \"fee\" value")
return
}
*/
//var fee uint64 = 0
scoins := r.FormValue("coins")
//shours := r.FormValue("hours")
coins, err := strconv.ParseUint(scoins, 10, 64)
if err != nil {
Error400(w, "Invalid \"coins\" value")
return
}
var hours uint64 = 0
var fee uint64 = 0 //doesnt work/do anything right now
//MOVE THIS INTO HERE
ret := Spend(gateway.D, gateway.D.Visor, Wg, walletId, wallet.NewBalance(coins, hours), fee, dst)
if ret.Error != "" {
Error400(w, "Spend Failed: %s", ret.Error)
}
SendOr404(w, ret)
}
}
// Creates a Transaction spending coins and hours from our coins
func CreateSpendingTransaction(wlt wallet.Wallet,
unconfirmed *UnconfirmedTxnPool, unspent *coin.UnspentPool,
headTime uint64, amt wallet.Balance, fee, burnFactor uint64,
dest cipher.Address) (coin.Transaction, error) {
txn := coin.Transaction{}
auxs := unspent.AllForAddresses(wlt.GetAddresses())
// Subtract pending spends from available
puxs := unconfirmed.SpendsForAddresses(unspent, wlt.GetAddressSet())
auxs = auxs.Sub(puxs)
// Determine which unspents to spend
spends, err := createSpends(headTime, auxs.Flatten(), amt, fee, burnFactor)
if err != nil {
return txn, err
}
// Add these unspents as tx inputs
toSign := make([]cipher.SecKey, len(spends))
spending := wallet.Balance{0, 0}
for i, au := range spends {
entry, exists := wlt.GetEntry(au.Body.Address)
if !exists {
log.Panic("On second thought, the wallet entry does not exist")
}
txn.PushInput(au.Hash())
toSign[i] = entry.Secret
spending.Coins += au.Body.Coins
spending.Hours += au.CoinHours(headTime)
}
// Determine how much change we get back, if any
_, changeHours, err := calculateBurnAndChange(spending.Hours,
amt.Hours, fee, burnFactor)
if err != nil {
// This should not occur, else createSpends is broken
return txn, err
}
change := wallet.NewBalance(spending.Coins-amt.Coins, changeHours)
// TODO -- send change to a new address
changeAddr := spends[0].Body.Address
if change.Coins == 0 {
if change.Hours > 0 {
msg := ("Have enough coins, but not enough to send coin hours " +
"change back. Would spend %d more hours than requested.")
return txn, fmt.Errorf(msg, change.Hours)
}
} else {
txn.PushOutput(changeAddr, change.Coins, change.Hours)
}
// Finalize the the transaction
txn.PushOutput(dest, amt.Coins, amt.Hours)
txn.SignInputs(toSign)
txn.UpdateHeader()
return txn, nil
}
//DEPRECATE
//deprecate dependency on wallet
// Creates a Transaction spending coins and hours from our coins
//MOVE SOMEWHERE ELSE
//Move to wallet or move to ???
func CreateSpendingTransaction(wlt wallet.Wallet,
unconfirmed *UnconfirmedTxnPool, unspent *coin.UnspentPool,
headTime uint64, amt wallet.Balance,
dest cipher.Address) (coin.Transaction, error) {
txn := coin.Transaction{}
auxs := unspent.AllForAddresses(wlt.GetAddresses())
// Subtract pending spends from available
puxs := unconfirmed.SpendsForAddresses(unspent, wlt.GetAddressSet())
auxs = auxs.Sub(puxs)
// Determine which unspents to spend
spends, err := createSpends(headTime, auxs.Flatten(), amt)
if err != nil {
return txn, err
}
// Add these unspents as tx inputs
toSign := make([]cipher.SecKey, len(spends))
spending := wallet.Balance{0, 0}
for i, au := range spends {
entry, exists := wlt.GetEntry(au.Body.Address)
if !exists {
log.Panic("On second thought, the wallet entry does not exist")
}
txn.PushInput(au.Hash())
toSign[i] = entry.Secret
spending.Coins += au.Body.Coins
spending.Hours += au.CoinHours(headTime)
}
//keep 1/4th of hours as change
//send half to each address
var changeHours uint64 = spending.Hours / 4
if amt.Coins == spending.Coins {
txn.PushOutput(dest, amt.Coins, changeHours/2)
txn.SignInputs(toSign)
txn.UpdateHeader()
return txn, nil
}
change := wallet.NewBalance(spending.Coins-amt.Coins, changeHours/2)
// TODO -- send change to a new address
changeAddr := spends[0].Body.Address
//create transaction
txn.PushOutput(changeAddr, change.Coins, change.Hours)
txn.PushOutput(dest, amt.Coins, changeHours/2)
txn.SignInputs(toSign)
txn.UpdateHeader()
return txn, nil
}
// Creates and broadcasts a transaction sending money from one of our wallets
// to destination address.
func walletSpendHandler(gateway *daemon.Gateway) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
walletId := wallet.WalletID(r.FormValue("id"))
if walletId == "" {
Error400(w, "Missing wallet_id")
return
}
sdst := r.FormValue("dst")
if sdst == "" {
Error400(w, "Missing destination address \"dst\"")
return
}
dst, err := cipher.DecodeBase58Address(sdst)
if err != nil {
Error400(w, "Invalid destination address")
return
}
sfee := r.FormValue("fee")
fee, err := strconv.ParseUint(sfee, 10, 64)
if err != nil {
Error400(w, "Invalid \"fee\" value")
return
}
scoins := r.FormValue("coins")
shours := r.FormValue("hours")
coins, err := strconv.ParseUint(scoins, 10, 64)
if err != nil {
Error400(w, "Invalid \"coins\" value")
return
}
hours, err := strconv.ParseUint(shours, 10, 64)
if err != nil {
Error400(w, "Invalid \"hours\" value")
return
}
SendOr404(w, gateway.Spend(walletId, wallet.NewBalance(coins, hours),
fee, dst))
}
}