WRAP / UNWRAP with v4 swap

[AlexField26]

Hello,

thank you for this repo; I am using it for uniswap v4 swaps. however, I want to to do swap to buy ETH on uniswap v4 and would like to add a wrap_eth to get WETH as output. I am struggling with that; is that possible with the current version?

Thanks
Alex

[Elnaril]

Hello Alex

Yes, it's possible, though it's absolutely not elegant in the current version ...
Here is an example where I sell some WBTC for ETH, and then get them as WETH:

from uniswap_universal_router_decoder import (
    FunctionRecipient,
    RouterCodec,
    V4Constants,
)
from uniswap_universal_router_decoder._enums import _RouterConstant  # ugly and not necessary, but maybe clearer ...

trx_params = (
    codec.
    encode.
    chain().
    v4_swap().
        swap_exact_in_single(
            pool_key=eth_wbtc_pool_key,
            zero_for_one=False,
            amount_in=wbtc_amount,
            amount_out_min=Wei(0),
        ).
        settle_all(wbtc_address, wbtc_amount).
        
        # All 3 below lines should work:
        # take(eth_address, "0x0000000000000000000000000000000000000002", V4Constants.OPEN_DELTA.value).
        # take(eth_address, ur_address, V4Constants.OPEN_DELTA.value).
        take(eth_address, _RouterConstant.ADDRESS_THIS.value, V4Constants.OPEN_DELTA.value).
        
        build_v4_swap().
    
    # The 2 below lines should work:
    wrap_eth(FunctionRecipient.SENDER, _RouterConstant.ROUTER_BALANCE.value).
    # wrap_eth(FunctionRecipient.SENDER, Wei(2**255)).
    
    build_transaction(account.address)
)

[AlexField26]

thank you so much; could you also give an example for the other way; swap WETH to WBTC?

Regards
Alex

[Elnaril]

For this way, there are several examples in the integration tests I believe you can get some inspiration from. If you keep struggling, feel free to post your code and I'll have a look.

[VladmirB332]

good

[plaaaga]

That's a good question.