problem about unwrap

[whlustb]

I need to do swap from uni to eth, my code is as below, all is fine except the unwrap procedure, the weth continue to increase, but not unwrap to eth, and I have tried to change unwrap_weth 1st para from FunctionRecipient.ROUTER, FunctionRecipient.SENDER, and 2nd para from 0 to int(0.03*10**18)) , but none work, it doesn't report any error, just not unwrap weth to eth, I have also tried use call only the unwrap function, not work as sell, any help for me to unwrap the weth to eth? many thank in advance.

[Elnaril]

Hi @whlustb ,

In order to receive ETH i/o WETH, I confirm that the first parameter should be FunctionRecipient.SENDER:

.unwrap_weth(FunctionRecipient.SENDER, 0)

Apart from that, I don't see any obvious issue with your code.

[Elnaril]

Are you using this address for WETH on Sepolia: 0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14 ?

Also, maybe you could share the link to a transaction where you use .unwrap_weth(FunctionRecipient.SENDER, 0) ?

[Elnaril]

As far as I understand it, you would not get int(0.01*10**18) weth from your swap with int(0.001 * 10**18) uni ...

At block 5591582 (when your trx was done) we have:

In [18]: quoter_contract.functions.quoteExactInput(path_1, 1000000000000000).call(block_identifier=5591582)
Out[18]: [5320970153792554, [183675120169770077943929389873], [1], 81425]

In [19]: 5320970153792554 / 10**18
Out[19]: 0.005320970153792554

So this line:

.unwrap_weth(FunctionRecipient.SENDER, int(0.01*1018))

makes the transaction to revert.

You should really try:

.unwrap_weth(FunctionRecipient.SENDER, 0)

[Elnaril]

1/ The unwrap_weth() method unwraps weth that are in the router's balance, not in you wallet.

2/ In your last transaction, you instructed the router to send the result of the swap directly to you, so there is no remaining weth to unwrap ...
The recipient of the swap method should be FunctionRecipient.ROUTER in this case.

[whlustb]

thank you so much, it works now, and I have paied for your coffe to your 0xe32A121C89121bF8B829D6d88BBEA89e5d88f002, thank u again.

[Elnaril]

Great!! :) And thanks a bunch for the coffees!! 👍