Good day everyone.
I deployed my contract to rinkeby, and I am trying to interact with it to do a uniswap ETH - Dai swap.
Am I doing anything wrong here?

I have seached and seen this syntax as the correct one to convert eth to wei and send while calling a function in my truffle console:
await engine.convertETHToDAI({value: web3.utils.toWei("0.1", "ether")})

When I use it, this is the error I get
I've included the code of function I'm calling for clarity. Can anyone look through it and tell me what I am doing wrong? Been clueless since yesterday

?? Anyone?

share the hash here

tx: 0x6b1bb2ec033bfd4ea1abfdb81b54e7581861310fc5db323251fa26ee2556ceb2

https://jeiwan.net/

Which line from the convertETHToDAI function is it failing on?

How do I know that? I run the command, it fails with the error I showed here

add revert('pof'); after a line. run. if it reverts with message "pof" then you haven't found your point of failure yet, i.e., all code up to that point is working. When it fails and it doesn't say "pof", then you know the code is not reaching your revert and you can assume the line before that is your point of failure.

But I suggest we take it private so we do not distract those specifically seeking help with solidity.

Added the revert statement on the very first line of the convertETHToDAI function and the exact same error as before came up. No "pof"

Hmm... that's odd. But it's helpful information, let me go back and look...

Wait, are you sure you re-compiled and re-deployed?

Yes, i did two steps: truffle compile and truffle deploy to network rinkeby

Can anyone help?

@help240 Alex Donald is another scammer inboxing people and pretending to be some sort of admin pls report him guys and get him off the group

I've pasted tx hash, deployed to GitHub, provided ether scan link. Is it that from what you can see, my code and set up is correct and everything should be ok?

Also so that I know exactly what the code is and I'm not just taking your word for it.

We all make mistakes. I've been 100% sure that the code was X, would stake my life on it, and then realize, "oh wait, I forgot, ..."

When you publish the code, there is no confusion, no doubt, no wasted time.

Thank you for your help and time, it's just getting frustrating.
How exactly do I publish or what should I Google search to find out?

I think truffle has a plugin that makes it easy

https://www.npmjs.com/package/truffle-plugin-verify

getAmountsOut returns in wei already no?

getAmountOut instead returns 1 value

Yes but i don't know what i have to pass into reserves parameters

all uniswap parameters and return values are in wei which is why you end up having to use parse/format so much on the front end

yes but he wants in wei no?

check getReserves

Ok thanks guys, i will try

Well, he was passing "1" into the function, so I told him he needed to convert to wei, I just assumed he'd want to convert the result back into tokenized units.

Yes, beacuse i want to show fixed value, some like 0.000.....

https://twitter.com/transmissions11/status/1518507047943245824?t=Aj0fLQdfKsLLuRtcXl2paQ&s=19

so always, utils.parseUnits(tokenizedValue, tokenDecimals) -> send off your data -> get back result -> utils.formatUnits(resultInWei, tokenDecimals) and display that

Ok thanks, i will try this one

BLACK MAGIC! lol...

I've installed and set it up. I don't know about "publishing" but from the npm documentation I saw it's used to verify contracts so I gave that a try and after setting it up and running the verify command this is my error.
I don't have a constructor argument in my contract so I don't know how to troubleshoot. Could you please check my contact on GitHub and see where I need to fix?
Here it is again
https://github.com/avwunufe/Uniswap-test

Well I think what this is telling you is that whatever contract is deployed at the address that truffle is telling it was deployed with constructor arguments. Try truffle migrate --reset --network rinkeby and then your verify command

you might throw in --compile-all too

I ran this and the verify command worked. But my function to convert eth failed with the Same error.
The new etherscan link:
https://rinkeby.etherscan.io/address/0x3e25f2763395e8b9A194bF37953E66EdE7679A7f

It reverted with 'POF'

Oh.. I thought I was supposed to see it in the console, not just in etherscan

Does this mean I have to move the revert statement down one line at a time then run truffle migrate --reset each time?

Wth is POF?

Lol how are you gonna debug this? First line itself is revert

Pro tip : kovan != rinkeby

??

Check the hardcoded addresses

did you see how it works?

after some blocks

Ok but what about a scenario where the random number is used to choose from a list which can be altered in the same block as the callback function.

I didn't understand

when you request the random value

is 1 tx

then the callback is another tx

Yes and if someone frontruns this transaction they can determine which entry in the list will be picked.

you mean the callback?

Yes

ah yes then yes

So in order to prevent this I should take a snapshot of the list when requesting randomness and use that snapshot in the callback

well I dom't know how you plan to use it

but usually if someone is frontrunning you
you can't do a lot from a contract

Yes, that's what I would do until you find the actual point of failure.

It's the revert message, I just called it POF, short for point of failure, because we're trying to figure out which line of code is actually causing the failure (since the actual failure is not giving us any message or clue).

I'm about to revolutionize block chain technology. DM me if you want to discuss how. And if you need any help with solidity, post your questions here.

Lol can you summarise here?

Sure, here's some bait... The problem we have right now with having multiple dapps on one chain (Smart Contract based chains) is - not all services are created equal. Some services need certain capabilities, some don’t need those capabilities and it’s just overhead for them. Some services are worth $1 a month; some are worth $50; some are worth $500 or more. If you put them all on the same chain, it’s like making people buy rocket fuel just to mow their lawn.

So you mean infra?

What I'm alluding to is what I believe to be the solution to this problem. We need an SDK which makes it super easy to develop what I'm calling SDCs (Single Dapp Chains).

Okay, I kinda follow you lol

Remix is good to get something started quickly, cos it has auto compile

But that's about it

I always suggest people learn to compile their contracts manually with solc and write scripts to manually deploy with ethersjs or web3. But if you really want a framework, I second hardhat.

'npx hardhat compile' lol

Debug - hardhat console.sol helps a lot

It's best to use 0.8.4 for security reasons

Ok but my sc use uniswapv2 so 0.6.6 and another protocol 0.8.8 i feel stuck

https://github.com/crytic/solc-select

Thx I check that

Screenshot?

You need to check for return value

https://ethereum.stackexchange.com/questions/9213/return-value-of-low-level-calls-not-used

https://hardhat.org/guides/compile-contracts.html

You don't need to use their contract, just copy their interface code and put it in your own file with whatever version.