Ethereum: How to calculate swap_out amount from DEXes with sqrtPrice?
I will be happy to help you calculate the amount of exchange with Decas (derivative currencies) using the “SQRTPRICE” method on Uniswap V3 and 2 in the morning MS.
Calculation of exchange exchange: Step by step guide
The “SQRTPRICE” function is a key element of the UNISWAP liquidity pool mechanics. Calculate the amount of exchange for a given input token (Inputtoken) based on the output token (Outputttoken, which can be derived from DEX), the price of the output token and total liquidity of the pool pool pool.
To calculate the exchange amount using "SQRTPrice" using the UnisWap V3, follow the following steps:
1. Define input parameters
* Inputtoken : The input token you want to exchange.
* Outputtoken
: The token you want to get in exchange for the input token (you can get it out of DEX).
* PriceoutPutken : Price of production token (Outputtoken) at the time of exchange.
* Pollikidge : Total liquidity of the pool, which is represented by the “Totalamoutout” parameter in Uniswap V3.
2. Calculate the exchange amount
The “SQRTPRICE” function can be used to calculate the amount of exchange in the following way:
`Python
Def calCULATE_SWAP_out (amount_in, price_OF_output_TOKEN, TOTAL_LIQUIDGE):

Calculate the exchange amount using SQRTPRICE
swap_out_amount = (amount_in / price_of_output_token) * Total_liquidge
return swap_out_amount
Sample use:
input_token_price = 1000
in wei
Output_token_price = 500
in wei
total_liquidge_v3 = 10e18
in wei
amount_in = 1e15
in wei (sample value)
swap_out_amount = calCULATE_SWAP_out (amount_in, output_token_price, total_liquidge_V3)
Print (f "exchange amount is: {swap_out_amount} wei")
3. Put out the output token
To remove the output token from DEX, you can use a library such as Openzeppelin’s “ERC20TOKEN” or implement your own logic to calculate the output token.
For example, if you have Dex, which provides the following parameters:
|. Parameter Description |.
|. — | — |
|. BASETOKEN The input token used to be moved. |.
|. Numtokens Number of tokens in each pool. |.
|. Priceofbasetoken | The price of the input token at the time of removal. |.
You can calculate the output token as follows:
`Python
def derive_output_taken (base_token, num_tokens, price_of_base_token):
Calculate the output token using the ERC20TOKEN Openzepelin library
with OpenzepLinerc Import ERC20TOKEN
Output_TOKEN = ERC20TOKEN (
Base_TOKEN,
num_tokens,
price_of_base_token * (num_tokens - 1)
)
Return output_taken
Sample use:
Base_TOKEN_PRICE = 10E6
W WeI
num_tokens = 1000
in wei
price_of_base_token_v2 = 20e3
in wei
Output_TOKEN = DERIVE_output_TOKEN (Base_TOKEN_PRICE, NUM_TOKENS, PRICE_OF_BASE_TOKEN_V2)
print (f "the output token is: {output_token.name}")
4
To calculate the exchange amount to Uniswap V2 and AMM, you can use a similar approach as above.
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