WIP Rough chart for GNO price during auction

gnosis-auction-price-at-block.py

#!/usr/bin/env python3.6
# plot for :
# https://github.com/ConsenSys/gnosis-contracts/blob/security_audit/contracts/solidity/DO/DutchAuction.sol#L236

import matplotlib.pyplot as plot

# about now (early night 2017-04-21)
#STARTBLOCK = 3_571_520
# expected  on early night of 2017-04-24
STARTBLOCK = 3_588_800
# magicnum in contract (see header)
PRICEFACTOR = 4500
# would have been a high starting price
#PRICEFACTOR = 1_000_000
# magicnum: average block time around 15 secs now, so 5760 blocks per day
DAY = 5760

def gen(startblock, pricefactor):
    currentblock = startblock
    while True:
        # magic contract formula (see header)
        price = pricefactor * pow(10,18) / (currentblock - startblock + 7500) + 1
        (yield currentblock, price)
        currentblock += DAY
    return

pricegen = gen(startblock = STARTBLOCK, pricefactor = PRICEFACTOR)

# fuck you matplotlib and your numpy arrays
B = []
P = []
while True:
    block, price = pricegen.send(None)
    #print(block, price / pow(10,18))
    B.append(block)
    P.append(price / pow(10,18)) # in ether
    # FIXME: should be timed transition comparison, price < stop price, not arbitrary
    if block > STARTBLOCK + 30*DAY or price < pow(10,15):
        break

# PLOT
#plot.plot(B, P, marker = 'o')
#plot.xlabel('B (block number)')

plot.plot(P, marker = 'o')
plot.xlabel('t (time, days)')

plot.ylabel('P (price, ether)')
#plot.legend()
plot.grid()
plot.show()