Checking amount of token in liquidity pool (Uniswap v2)

[uniswap-python]

Checking amount of token in liquidity pool (Uniswap v2)

[msujithk]

I added my own function to the library to get amount of tokens in liquidity pool and to get the price of the input token in eth. Here is the code,

def get_token_price_in_eth(self, owner, weth_address,token) -> Wei:
    weth_address = self.w3.toChecksumAddress(weth_address)#WETH
    erc20_weth = self.erc20_contract(weth_address)
    owner = self.w3.toChecksumAddress(owner)#Uni:Token input exchange ex: UniV2:DAI
    weth_balance: int = erc20_weth.functions.balanceOf(owner).call()
    weth_balance = float(self.w3.fromWei(weth_balance,'ether') )
    print (f'WETH quantity in Uniswap Pool = {weth_balance}')
    token_address = self.w3.toChecksumAddress(token) # Like DAI
    erc20 = self.erc20_contract(token_address)
    token_balance: int = erc20.functions.balanceOf(owner).call()
    gwei = 1000000000
    token_balance = float(token_balance / gwei)
    print (f'Token balance in Uniswap Pool = {token_balance}')
    return float(weth_balance/token_balance)  # price of token

[jhb10c]

@Mreyna3, @8ty8t, are you looking to check LP tokens for V2 or V3 uniswap. For V2, you can check the total LP from the pairs contract function totalSupply(). I think V3 should be roughly similar. If you are still looking for a solution. I can type one up.

[Prijwal-Naidu]

I added my own function to the library to get amount of tokens in liquidity pool and to get the price of the input token in eth. Here is the code,

def get_token_price_in_eth(self, owner, weth_address,token) -> Wei:
    weth_address = self.w3.toChecksumAddress(weth_address)#WETH
    erc20_weth = self.erc20_contract(weth_address)
    owner = self.w3.toChecksumAddress(owner)#Uni:Token input exchange ex: UniV2:DAI
    weth_balance: int = erc20_weth.functions.balanceOf(owner).call()
    weth_balance = float(self.w3.fromWei(weth_balance,'ether') )
    print (f'WETH quantity in Uniswap Pool = {weth_balance}')
    token_address = self.w3.toChecksumAddress(token) # Like DAI
    erc20 = self.erc20_contract(token_address)
    token_balance: int = erc20.functions.balanceOf(owner).call()
    gwei = 1000000000
    token_balance = float(token_balance / gwei)
    print (f'Token balance in Uniswap Pool = {token_balance}')
    return float(weth_balance/token_balance)  # price of token

How do you find that "owner" knowing only token address?

You can generate the token pair using the router address of uniswap (or sushiswap), and the two token addresses. I answered this question on stackexchange: https://stackoverflow.com/questions/66710238/compute-uniswap-pair-address-via-python/67156507#67156507

[ErikBjare]

@cmackeen Yeah, I was lazy and didn't implement get_ex_token_balance for Uniswap v2 since I didn't personally have any need for it.

It should be easy to implement in a similar fashion to what @msujithk suggested (although I haven't tested it), so feel free to submit a PR!

[yukarinoki]

@ErikBjare I'd like to work on this issue, is there anyone else working on this issue? Otherwise, would you like to assign me this issue? (Or should I send a pull request without an assign?)

[ErikBjare]

@yukarinoki To my knowledge no one is working on it. Go ahead and do your thing, I'll assign you to the issue :)

[camperrr]

I added my own function to the library to get amount of tokens in liquidity pool and to get the price of the input token in eth. Here is the code,

def get_token_price_in_eth(self, owner, weth_address,token) -> Wei:
    weth_address = self.w3.toChecksumAddress(weth_address)#WETH
    erc20_weth = self.erc20_contract(weth_address)
    owner = self.w3.toChecksumAddress(owner)#Uni:Token input exchange ex: UniV2:DAI
    weth_balance: int = erc20_weth.functions.balanceOf(owner).call()
    weth_balance = float(self.w3.fromWei(weth_balance,'ether') )
    print (f'WETH quantity in Uniswap Pool = {weth_balance}')
    token_address = self.w3.toChecksumAddress(token) # Like DAI
    erc20 = self.erc20_contract(token_address)
    token_balance: int = erc20.functions.balanceOf(owner).call()
    gwei = 1000000000
    token_balance = float(token_balance / gwei)
    print (f'Token balance in Uniswap Pool = {token_balance}')
    return float(weth_balance/token_balance)  # price of token

How do you find that "owner" knowing only token address?

[ledzgio]

Any news about this? I'd like to have a way to get the amount of tokens provided as liquidity in a specific uniswap pool.

Is there a way, given the amount of LP UNI-V2 tokens, how much was deposited as liquidity?

[SaltySousChef]

When you create a pair the object returned by the sdk has "tokenAmounts" and "liquidityToken" as two identifiers you can call query. "tokenAmounts" contains the contract addresses for the two tokens you are trying to trade and their relative value and "liquidityToken" contains the contract address for the liquidity pool. To get the balance/rate from the liquidity pool create an instance of the ERC20 contract using its ABI and the address of the token and then call balanceOf on the liquidity pool.

[0hax]

    token_balance: int = erc20.functions.balanceOf(owner).call()
    gwei = 1000000000
    token_balance = float(token_balance / gwei)

Hi,
Can you explain why you are dividing the balance of the token by gwei ? I can't understand this.

[SaltySousChef]

The balance received is wei, replace gwai with how ever many units of wei make up 1 unit of the currency. It just turns the huge numbers in to easier to manage decimals. You should consider using a big number package as there will be implicit rounding issues making your output less precise.

…

Sent from my iPhone

On 9 Apr 2021, at 10:05, 0hax ***@***.***> wrote:  token_balance: int = erc20.functions.balanceOf(owner).call() gwei = 1000000000 token_balance = float(token_balance / gwei) Hi, Can you explain why you are dividing the balance of the token by gwei ? I can't understand this. — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or unsubscribe.

[freaker2k7]

I also lost you on how to get the owner and why it's the same owner for both tokens/addresses.

[Prijwal-Naidu]

I also lost you on how to get the owner and why it's the same owner for both tokens/addresses.

The 'owner' key is the address for the token pair which is unique for each Exchange.

[joseddg92]

So, the function shared on this post can be used to get the liquidity in v2? I am looking to use this in BSC chain.

I already got the fix for constants.py for the BSC chain, and I have also copied the function suggested here, but I do not understand the parameters. Suppose I want to check the liquidity of CAKE in pancakeswap. All I have is the CAKE contract address.

What is owner, weth_addrees and token?

[joseddg92]

@msujithk also, I am getting

AttributeError: 'Uniswap' object has no attribute 'erc20_contract'

Where is that method?

[joseddg92]

Sorry for my last two comments, got it figured out.

Working code for BSC:

    def get_pool_info(self, owner, weth_address, token) -> Wei:
        weth_address = self.w3.toChecksumAddress(weth_address)  # WETH
        erc20_weth= _load_contract_erc20(self.w3, weth_address)

        owner = self.w3.toChecksumAddress(owner)
        weth_balance: int = erc20_weth.functions.balanceOf(owner).call()
        weth_balance = float(self.w3.fromWei(weth_balance, 'ether'))
        print(f'WETH quantity in Uniswap Pool = {weth_balance}')
        token_address = self.w3.toChecksumAddress(token)  # Like DAI
        erc20 = _load_contract_erc20(self.w3, token_address)

        token_balance: int = erc20.functions.balanceOf(owner).call()
        gwei = 1000000000
        token_balance = float(token_balance / gwei)
        print(f'Token balance in Uniswap Pool = {token_balance}')
        
        return 0.0 if token_balance == 0 else float(weth_balance / token_balance)  # price of token

Used like this:

# For BSC network
CONTRACTS = {
    "no_liq": "0x0Fc701755e825C488439Df26393505C4AC9e6Fc1",
    "CAKE": "0x0E09FaBB73Bd3Ade0a17ECC321fD13a19e81cE82"
}

PANCAKE_SWAP_FACTORY= "0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73"
PANCAKE_SWAP_ROUTER = "0x10ED43C718714eb63d5aA57B78B54704E256024E"

for name, addr in CONTRACTS.items():
    pancakeswap.get_pool_info(
        owner=PANCAKE_SWAP_ROUTER,
        weth_address=addr,
        token=addr
    )

[8ty8t]

@joseddg92 is there anyway for me to message you about the code above?

[Mreyna3]

@joseddg92 Does your code get the amount of lp tokens for a given address

[hoangduyloc]

@joseddg92 method is just good for tracking small amounts of tokens, it can not work for most of the tokens. @8ty8t, @Mreyna3. I think we need to figure out some other ways to successfully tracking the liquid pool.

[asdfzxh8]

joseddg92 no such thing as sorx or fx or etc, cepux, say etc any nmw s perfect

[0x6d656d6573]

@Mreyna3, @8ty8t, are you looking to check LP tokens for V2 or V3 uniswap. For V2, you can check the total LP from the pairs contract function totalSupply(). I think V3 should be roughly similar. If you are still looking for a solution. I can type one up.

Where can I get the abi for this?