Love this software. How can I use it to buy 1 DAI on quickswap.exchange?

[621625]

Hi,

I love gochain/web3. It rocks. You rock.

How can I use it to buy 1 DAI on quickswap.exchange? This might be possible using py.web3. But I am also testing gochain/web3 now and so far I prefer this software.

Ok, so we can already deploy and interact using goweb3. But concretely, let's say I want to buy 1 DAI on quickswap.exchange? Can I do this with web3? Any examples about how to interact with DEX using goweb3?

[treeder]

You'd have to find the abi files for quickswap if they are available, then you can use that with the --abi flag and then use web3 contract call

[treeder]

You should ask the people that wrote the contract, but a quick google found this: https://docs.uniswap.org/protocol/V2/reference/smart-contracts/router-02#swapexactethfortokens

[621625]

Ok, now I have tried using the input data from the corresponding parameters I found. So the command looks like this:

web3 contract call --address 0x92c819e24Cb020e35
Fce434a33E39Fd5C85AB2aA --abi qs.abi --function
swapExactETHForTokens 138607273911012674 0d500b1
d8e8ef31e21c99d1db9a6444d3adf12708f3cf7ad23cd3ca
dbd9735aff958023239c6a063 e5d77ab5fea649ca621f4f
6c8a9b542fef88ab8b 3260059519

It generates this error message and I don't know why. I just want to make exactly the same transaction as I already have done but using the CLI and web3 this time. Error message:

ERROR: Error calling contract: unsupported input type 4

[621625]

There is an error above, the path should actually have two addresses.

[621625]

I have updated the command to separate the two addresses for the parameter. Now it looks like this:

web3 contract call --address 0x92c819e24Cb020e35Fce434a33E39Fd5C85AB2aA --abi qs.abi --function swapExactETHForTokens 138607273911012674 0d500b1d8e8ef31e21c99d1db9a6444d3adf1270 8f3cf7ad23cd3cadbd9735aff958023239c6a063 e5d77ab5fea649ca621f4f6c8a9b542fef88ab8b 3260059519

However, this generates the following error message:

ERROR: Error calling contract: mismatched argument (4) and parameter (5) counts

Is my syntax correct or do I need to add some parenthesis or separators to the command?

[treeder]

I'm not sure this can handle an array of inputs like that path parameter requires, that's probably the issue.

[621625]

Yes, I thought the same thing yesterday. Maybe you haven't implemented arrays for parameters. Please do. I assume the syntax is correct then, just plain text without [ or ". Hope you implement this, it would be a very cool feature.

…

-------- Original Message --------

On Aug 28, 2021, 00:46, Travis Reeder wrote: I'm not sure this can handle an array of inputs like that path parameter requires, that's probably the issue. — You are receiving this because you authored the thread. Reply to this email directly, [view it on GitHub](#216 (reply in thread)), or [unsubscribe](https://github.com/notifications/unsubscribe-auth/AAVUCQQXIOPA43AOYV25PHDT67FQJANCNFSM5C4S22GA).

[treeder]

Related issue: #218