(tokens, balances, lastChangeBlock) = vault.getPoolTokens(poolId);
prices = fetchPricesFromPriceProvider(tokens); //ex. CoinGecko
poolValueUsd = sum(balances[i]*price[i]);
bptPriceUsd = poolValueUsd/bpt.totalSupply();
function _getPositionTVL(HoldingPI memory p, address base) public view override returns (uint256) {
    PositionBP memory PTI = registry.getPositionBP(vaultId, p.positionId);
    PoolInfo memory pool = abi.decode(PTI.additionalData, (PoolInfo));
    uint256 lpBalance = totalLpBalanceOf(pool);
    (, uint256[] memory _tokenBalances,) = IBalancerVault(balancerVault).getPoolTokens(pool.poolId);
    uint256 _totalSupply = IERC20(pool.pool).totalSupply();

    uint256 _weight = pool.weights[pool.tokenIndex];

    uint256 token1bal = valueOracle.getValue(pool.tokens[pool.tokenIndex], base, _tokenBalances[pool.tokenIndex]);
    return (((1e18 * token1bal * lpBalance) / _weight) / _totalSupply);
} 
