# This software (Augur) allows buying && selling event outcomes in ethereum
# Copyright (C) 2015 Forecast Foundation 
#    This program is free software; you can redistribute it &&/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is free software: you can redistribute it &&/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
# Any questions please contact joey@augur.net

data cashcoinBalances[]

def init():
    # test initial funds
    self.cashcoinBalances[tx.origin] = 100000*2^64

# @return: cash balance of address
def balance(address):
    return(self.cashcoinBalances[address])

# should send values as fixed point in UI (1 is 2^64, 4 is 4*2^64, .5 is 2^63, etc.)
# so cashcoin fees could just go to root branch, or we could not have fees besides 
# gas fee to do a send transaction
# @return: value sent, 0 if fails
def send(recver, value):
    sender = tx.origin
    senderBalance = self.cashcoinBalances[sender]
    if(senderBalance >= value):
        self.cashcoinBalances[sender] -= value
        self.cashcoinBalances[recver] += value
        return(value)
    else:
        return(0)

# @return value of cash sent; fail is 0
def sendFrom(recver, value, from):
    if(from!=tx.origin):
        return(0)
    senderBalance = self.cashcoinBalances[from]
    if(senderBalance >= value):
        self.cashcoinBalances[from] -= value
        self.cashcoinBalances[recver] += value
        return(value)
    else:
        return(0)

# make sure only coming from specific contracts
def subtractCash(ID, amount):
    #if(!self.whitelist.check(msg.sender)):
    #    return(-1)
    self.cashcoinBalances[ID] -= amount
    return(1)

def addCash(ID, amount):
    #if(!self.whitelist.check(msg.sender)):
    #    return(-1)
    self.cashcoinBalances[ID] += amount
    return(1)

def setCash(address, balance):
    #if !self.whitelist.check(msg.sender):
    #    return(-1)
    self.cashcoinBalances[address] = balance
    return(1)