目的是计算uniswap v3池的总锁定值（TVL）。

import json
from web3 import Web3
from collections import namedtuple

infura_url = 'https://mainnet.infura.io/v3/******'
web3 = Web3(Web3.HTTPProvider(infura_url))

def read_json_file(directory:str, file_name: str):
    try:
        file_path = directory + file_name
        f_ = open(file_path, 'r')
    except Exception as e:
        print(f"Unable to open the {file_path} file")
        raise e
    else:
        json_data = json.loads(f_.read())
    return json_data

# uniswap_ETH_USDT.v3

abi = read_json_file('./', 'abis/uniswapV3Pool.json')
address = '0x4e68Ccd3E89f51C3074ca5072bbAC773960dFa36'
exchange_contract = web3.eth.contract(address=Web3.toChecksumAddress(address), abi=abi)

Tick = namedtuple("Tick", "liquidityGross liquidityNet feeGrowthOutside0X128 feeGrowthOutside1X128 tickCumulativeOutside secondsPerLiquidityOutsideX128 secondsOutside initialized")

amounts0 = 0
amounts1 = 0
liquidity = 0
slot0 = exchange_contract.functions.slot0().call()
sqrtPriceCurrent = slot0[0] / (1 << 96)
MIN_TICK = -887272
MAX_TICK = 887272
TICK_SPACING = exchange_contract.functions.tickSpacing().call()

def calculate_token0_amount(liquidity, sp, sa, sb):
    sp = max(min(sp, sb), sa)
    return liquidity * (sb - sp) / (sp * sb)

def calculate_token1_amount(liquidity, sp, sa, sb):
    sp = max(min(sp, sb), sa)
    return liquidity * (sp - sa)

for tick in range(MIN_TICK, MAX_TICK, TICK_SPACING):
  tickRange = Tick(*exchange_contract.functions.ticks(tick).call())
  liquidity += tickRange.liquidityNet
  sqrtPriceLow = 1.0001**(tick // 2)
  sqrtPriceHigh = 1.0001**((tick + TICK_SPACING) // 2)
  amounts0 += calculate_token0_amount(liquidity, sqrtPriceCurrent, sqrtPriceLow, sqrtPriceHigh)
  amounts1 += calculate_token1_amount(liquidity, sqrtPriceCurrent, sqrtPriceLow, sqrtPriceHigh)

  print(amounts0, amounts1, tick) # for better output, should correct for the amount of decimals before printing

这确实会在MIN_TICK和MAX_TICK中打印流动性，但会花费大量时间和浪费web3调用，因为它也会在零流动性刻度上迭代。现在这些都是硬编码的，在这里我想知道最小-最大值是多少，这样这个范围就不会包含任何零流动性刻度。