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# Ethereum forks Counterparty in 340 lines of serpent
# Not yet tested
# assets[i] = a registered asset, assets[i].holders[j] = former or current i-holder
data assets[2^50](creator, name, calldate, callprice, dividend_paid, holders[2^50], holdersCount)
data nextAssetId
# holdersMap: holdersMap[addr][asset] = 1 if addr holds asset
data holdersMap[2^160][2^50]
# balances[x][y] = how much of y x holds
data balances[2^160][2^50]
# orders[a][b] = heap of indices to (c, d, e)
# = c offers to sell d units of a at a price of e units of b per 10^18 units
# of a
data orderbooks[2^50][2^50]
# store of general order data
data orders[2^50](seller, asset_sold, quantity, price)
data ordersCount
# data feeds
data feeds[2^50](owner, value)
data feedCount
# heap
data heap
extern heap: [register, push, pop, top, size]
data cfds[2^50](maker, acceptor, feed, asset, strike, leverage, min, max, maturity)
data cfdCount
data bets[2^50](maker, acceptor, feed, asset, makerstake, acceptorstake, eqtest, maturity)
data betCount
def init():
heap = create('heap.se')
# Add units (internal method)
def add(to, asset, value):
assert msg.sender == self
self.balances[to][asset] += value
# Add the holder to the holders list
if not self.holdersMap[to][asset]:
self.holdersMap[to][asset] = 1
c = self.assets[asset].holdersCount
self.assets[asset].holders[c] = to
self.assets[asset].holdersCount = c + 1
# Register a new asset
def register_asset(q, name, calldate, callprice):
newid = self.nextAssetId
self.assets[newid].creator = msg.sender
self.assets[newid].name = name
self.assets[newid].calldate = calldate
self.assets[newid].callprice = callprice
self.assets[newid].holders[0] = msg.sender
self.assets[newid].holdersCount = 1
self.balances[msg.sender][newid] = q
self.holdersMap[msg.sender][newid] = 1
# Send
def send(to, asset, value):
fromval = self.balances[msg.sender][asset]
if fromval >= value:
self.balances[msg.sender][asset] -= value
self.add(to, asset, value)
# Order
def mkorder(selling, buying, quantity, price):
# Make sure you have enough to pay for the order
assert self.balances[msg.sender][selling] >= quantity:
# Try to match existing orders
o = orderbooks[buying][selling]
if not o:
o = self.heap.register()
orderbooks[selling][buying] = o
sz = self.heap.size(o)
invprice = 10^36 / price
while quantity > 0 and sz > 0:
orderid = self.heap.pop()
p = self.orders[orderid].price
if p > invprice:
sz = 0
else:
q = self.orders[orderid].quantity
oq = min(q, quantity)
b = self.orders[orderid].seller
self.balances[msg.sender][selling] -= oq * p / 10^18
self.add(msg.sender, buying, oq)
self.add(b, selling, oq * p / 10^18)
self.orders[orderid].quantity = q - oq
if oq == q:
self.orders[orderid].seller = 0
self.orders[orderid].price = 0
self.orders[orderid].asset_sold = 0
quantity -= oq
sz -= 1
assert quantity > 0
# Make the order
c = self.ordersCount
self.orders[c].seller = msg.sender
self.orders[c].asset_sold = selling
self.orders[c].quantity = quantity
self.orders[c].price = price
self.ordersCount += 1
# Add it to the heap
o = orderbooks[selling][buying]
if not o:
o = self.heap.register()
orderbooks[selling][buying] = o
self.balances[msg.sender][selling] -= quantity
self.heap.push(o, price, c)
return(c)
def cancel_order(id):
if self.orders[id].seller == msg.sender:
self.orders[id].seller = 0
self.orders[id].price = 0
self.balances[msg.sender][self.orders[id].asset_sold] += self.orders[id].quantity
self.orders[id].quantity = 0
self.orders[id].asset_sold = 0
def register_feed():
c = self.feedCount
self.feeds[c].owner = msg.sender
self.feedCount = c + 1
return(c)
def set_feed(id, v):
if self.feeds[id].owner == msg.sender:
self.feeds[id].value = v
def mk_cfd_offer(feed, asset, strike, leverage, min, max, maturity):
b = self.balances[msg.sender][asset]
req = max((strike - min) * leverage, (strike - max) * leverage)
assert b >= req
self.balances[msg.sender][asset] = b - req
c = self.cfdCount
self.cfds[c].maker = msg.sender
self.cfds[c].feed = feed
self.cfds[c].asset = asset
self.cfds[c].strike = strike
self.cfds[c].leverage = leverage
self.cfds[c].min = min
self.cfds[c].max = max
self.cfds[c].maturity = maturity
self.cfdCount = c + 1
return(c)
def accept_cfd_offer(c):
assert not self.cfds[c].acceptor and self.cfds[c].maker
asset = self.cfds[c].asset
strike = self.cfds[c].strike
min = self.cfds[c].min
max = self.cfds[c].max
leverage = self.cfds[c].leverage
b = self.balances[msg.sender][asset]
req = max((min - strike) * leverage, (max - strike) * leverage)
assert b >= req
self.balances[msg.sender][asset] = b - req
self.cfds[c].acceptor = msg.sender
self.cfds[c].maturity += block.timestamp
def claim_cfd_offer(c):
asset = self.cfds[c].asset
strike = self.cfds[c].strike
min = self.cfds[c].min
max = self.cfds[c].max
leverage = self.cfds[c].leverage
v = self.feeds[self.cfds[c].feed].value
assert v <= min or v >= max or block.timestamp >= self.cfds[c].maturity
maker_req = max((strike - min) * leverage, (strike - max) * leverage)
acceptor_req = max((min - strike) * leverage, (max - strike) * leverage)
paydelta = (strike - v) * leverage
self.add(self.cfds[c].maker, asset, maker_req + paydelta)
self.add(self.cfds[c].acceptor, asset, acceptor_req - paydelta)
self.cfds[c].maker = 0
self.cfds[c].acceptor = 0
self.cfds[c].feed = 0
self.cfds[c].asset = 0
self.cfds[c].strike = 0
self.cfds[c].leverage = 0
self.cfds[c].min = 0
self.cfds[c].max = 0
self.cfds[c].maturity = 0
def withdraw_cfd_offer(c):
if self.cfds[c].maker == msg.sender and not self.cfds[c].acceptor:
asset = self.cfds[c].asset
strike = self.cfds[c].strike
min = self.cfds[c].min
max = self.cfds[c].max
leverage = self.cfds[c].leverage
maker_req = max((strike - min) * leverage, (strike - max) * leverage)
self.balances[self.cfds[c].maker][asset] += maker_req
self.cfds[c].maker = 0
self.cfds[c].acceptor = 0
self.cfds[c].feed = 0
self.cfds[c].asset = 0
self.cfds[c].strike = 0
self.cfds[c].leverage = 0
self.cfds[c].min = 0
self.cfds[c].max = 0
self.cfds[c].maturity = 0
def mk_bet_offer(feed, asset, makerstake, acceptorstake, eqtest, maturity):
assert self.balances[msg.sender][asset] >= makerstake
c = self.betCount
self.bets[c].maker = msg.sender
self.bets[c].feed = feed
self.bets[c].asset = asset
self.bets[c].makerstake = makerstake
self.bets[c].acceptorstake = acceptorstake
self.bets[c].eqtest = eqtest
self.bets[c].maturity = maturity
self.balances[msg.sender][asset] -= makerstake
self.betCount = c + 1
return(c)
def accept_bet_offer(c):
assert self.bets[c].maker and not self.bets[c].acceptor
asset = self.bets[c].asset
acceptorstake = self.bets[c].acceptorstake
assert self.balances[msg.sender][asset] >= acceptorstake
self.balances[msg.sender][asset] -= acceptorstake
self.bets[c].acceptor = msg.sender
def claim_bet_offer(c):
assert block.timestamp >= self.bets[c].maturity
v = self.feeds[self.bets[c].feed].value
totalstake = self.bets[c].makerstake + self.bets[c].acceptorstake
if v == self.bets[c].eqtest:
self.add(self.bets[c].maker, self.bets[c].asset, totalstake)
else:
self.add(self.bets[c].acceptor, self.bets[c].asset, totalstake)
self.bets[c].maker = 0
self.bets[c].feed = 0
self.bets[c].asset = 0
self.bets[c].makerstake = 0
self.bets[c].acceptorstake = 0
self.bets[c].eqtest = 0
self.bets[c].maturity = 0
def cancel_bet(c):
assert not self.bets[c].acceptor and msg.sender == self.bets[c].maker
self.balances[msg.sender][self.bets[c].asset] += self.bets[c].makerstake
self.bets[c].maker = 0
self.bets[c].feed = 0
self.bets[c].asset = 0
self.bets[c].makerstake = 0
self.bets[c].acceptorstake = 0
self.bets[c].eqtest = 0
self.bets[c].maturity = 0
def dividend(holder_asset, divvying_asset, ratio):
i = 0
sz = self.assets[holder_asset].holdersCount
t = 0
holders = array(sz)
payments = array(sz)
while i < sz:
holders[i] = self.assets[holder_asset].holders[i]
payments[i] = self.balances[holders[i]][holder_asset] * ratio / 10^18
t += payments[i]
i += 1
if self.balances[msg.sender][divvying_asset] >= t:
i = 0
while i < sz:
self.add(holders[i], divvying_asset, payments[i])
i += 1
self.balances[msg.sender][divvying_asset] -= t
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