univ3 如何计算卖出或者买入一定数量币后的价格会变成多少 | 登链社区

50 univ3 如何计算卖出或者买入一定数量币后的价格会变成多少

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univ3 如何计算卖出或者买入一定数量币后的价格会变成多少？

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1 个回答

Charm - 学生 2023-04-30 17:01

按照uni3公式写的代码，你试试

``import math

q96 = 2**96

icp = 10**8

def price_to_tick(p):
return math.floor(math.log(p, 1.0001))

def price_to_sqrtp(p):
return int(math.sqrt(p) * q96)

def sqrtp_to_price(sqrtp):
return (sqrtp / q96) ** 2

def tick_to_sqrtp(t):
return int((1.0001 ** (t / 2)) * q96)

def liquidity0(amount, pa, pb):
if pa > pb:
pa, pb = pb, pa
return (amount * (pa * pb) / q96) / (pb - pa)

def liquidity1(amount, pa, pb):
if pa > pb:
pa, pb = pb, pa
return amount * q96 / (pb - pa)

def calc_amount0(liq, pa, pb):
if pa > pb:
pa, pb = pb, pa
return int(liq * q96 * (pb - pa) / pb / pa)

def calc_amount1(liq, pa, pb):
if pa > pb:
pa, pb = pb, pa
return int(liq * (pb - pa) / q96)

liq=115619824967
sqrtp_cur=12401388481691991086552029889
amount_in = 1 * icp
price_diff = (amount_in * q96) // liq
price_next = sqrtp_cur + price_diff
print("Now price:", (sqrtp_cur / q96) ** 2)
print("Now tick:", price_to_tick((sqrtp_cur / q96) ** 2))

print("New price:", (price_next / q96) ** 2)
print("New sqrtP:", price_next)
print("New tick:", price_to_tick((price_next / q96) ** 2))

amount_in = calc_amount1(liq, price_next, sqrtp_cur)
amount_out = calc_amount0(liq, price_next, sqrtp_cur)

print("sns1 in:", amount_in / icp)
print("icp out:", (amount_out / icp))`