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Add Pancakeswap V3 trades support#376

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JohnDoe424242 wants to merge1 commit intouniswap-python:master
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JohnDoe424242
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It's not full support for Pancakeswap V3, but now it's possible to recognize prices and make trades. Pancakeswap V3 is almost the same, but there are some differences, support for which I have added. I also added theuse_rpc_gas_price option to not sendtype 2 transactions to BSC. But since BSC is not POS blockchain, in Web3 object you have to manually addgeth_poa_middleware.

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codecovbot commentedJan 20, 2024•
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Codecov Report

Attention: Patch coverage is83.33333% with16 lines in your changes missing coverage. Please review.

Project coverage is 83.93%. Comparing base(59fba76) to head(20ae24a).
Report is 4 commits behind head on master.

Files with missing linesPatch %Lines
uniswap/uniswap.py82.02%16 Missing⚠️
Additional details and impacted files
@@            Coverage Diff             @@##           master     #376      +/-   ##==========================================- Coverage   84.20%   83.93%   -0.27%==========================================  Files          11       11                Lines        1057     1139      +82     ==========================================+ Hits          890      956      +66- Misses        167      183      +16

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@Dewald928
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Dewald928 commentedJan 25, 2024•
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Care to share an example script of how to call this?

Additionally, things that have to change are the pair contract ABI. To make theget_pool_state work.

@JohnDoe424242
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@Dewald928 unfortunately pools management is not implemented in this patch, trading only.

Care to share an example script of how to call this?

Nothing in particular, just like the regular code, except for the POA middleware

import uniswapfrom web3 import Web3from web3.middleware import geth_poa_middlewarew3 = Web3(Web3.HTTPProvider('http://node.com', request_kwargs={"timeout": 10}))w3.middleware_onion.inject(geth_poa_middleware, layer=0) # thisuswap = uniswap.Uniswap('0xADDR',                        'private_key',                        web3=w3,                        version=3,                        use_rpc_gas_price=True) # to use legacy type 0 transactionsprice = uswap.get_price_output('0xTOKEN_ADDR_1',                               '0xTOKEN_ADDR_2',                               1000000000,                               fee=500)tx_hash = uswap.make_trade_output('0xTOKEN_ADDR_1',                                  '0xTOKEN_ADDR_2',                                  1000000000,                                  fee=500)

@hahage21
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I use this code but wrong，i dont know how to use the code

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