# How is the TVL Calculated?

How is the TVL on the homepage of Position Exchange calculated?

Here is the code:

```go
stakedAmountInNaivePoolPOSI, err := s.evmAdapter.GetPOSIBalance(constants.POSIStakingManagerAddress)
if err != nil {
	return err
}
stakedAmountInNaivePoolPOSIV2, err := s.evmAdapter.GetPOSIBalance(constants.POSIStakingManagerV2Address)
if err != nil {
	return err
}
stakedAmountInNFTPoolsPOSI, err := s.getStakedAmountInNFTPoolsPOSI()
if err != nil {
	return err
}
stakedAmountInLPPairFarmsPOSI, err := s.getStakedAmountInLPPairFarmsPOSI()
if err != nil {
	return err
}
USDPriceOfPOSI, err := s.redisAdapter.GetUSDPrice(ctx, constants.PositionExchangeContractAddress)
if err != nil {
	return err
}

// stakedAmountInLPPairFarmsPOSI multiply 2 because LP value in USD is the same for the other token
// based on x.y = k formula
totalUSDValueLocked := stakedAmountInLPPairFarmsPOSI.Mul(decimal.NewFromInt(2)).Add(*stakedAmountInNaivePoolPOSI).Add(*stakedAmountInNaivePoolPOSIV2).Add(*stakedAmountInNFTPoolsPOSI).Mul(*USDPriceOfPOSI)
return s.redisAdapter.SetStatistics(ctx,
	constants.PositionExchangeContractAddress,
	constants.StatisticsTotalValueLockedFieldName,
	&totalUSDValueLocked)
```

Explain:

> (posi.balanceOf(POSIStakingManagerAddress) + posi.balanceOf(POSIStakingManagerV2Address)
>
> +posi.balanceOf(POSINFTMintProxyV1) + posi.balanceOf(POSINFTMintProxyV2) + 
>
> (posi.balanceOf(BUSDLP) + posi.balanceOf(BNBLP))\*2)
>
> \*posiUSD

Where:

| Variable                    | Value                                      |
| --------------------------- | ------------------------------------------ |
| POSIStakingManagerAddress   | 0x0c54b0b7d61de871db47c3ad3f69feb0f2c8db0b |
| POSIStakingManagerV2Address | 0xB02de8F384613d0aa2521B188b55c4D006dDB2D1 |
| POSINFTMintProxyV1          | 0x0Fb07a8527f45d7625Ab6486718910ce44a608b5 |
| POSINFTMintProxyV2          | 0xd8b6E267a0A46E13047056F105787dB9aFFb4b9a |
| BUSDLP                      | 0x00222D964a2077301309809Ab3bf56485C126A9C |
| BNBLP                       | 0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c |

Let's verify by yourself!