In the uniswap router V2 contract, there is a function called swapExactETHForTokensSupportingFeeOnTransferTokens.

One of the parameters it accepts in the path parameter, which is a list containing two addresses, WBNB and the address of the token i want to buy.

When I use this function to buy tokens, it doesn't buy it if the token I'm trying to buy doesn't have BNB Liquidity Pool.

If the token has a very small BNB LP, say $1, it buys about that much worth and diacards the rest.

It happened to me earlier today. I spent .05BNB on a token that was selling for $.30. I ended up with a total of 24 tokens for my $20.

When I buy that same token via Trust Wallet, the transaction goes like this WBNB -> BUSD -> TOKEN and I get the correct amount.

What must i put in that path parameter to make sure that it correctly routes my transaction ?

Oct 1, 2021, 7:33 PM

Use multi hops to swap tokens

Which doesn't have a liquidity pool

Oct 1, 2021, 7:38 PM

How do I do this?

Oct 1, 2021, 7:39 PM

On specifying the path first swap to bnb then to the token you want to swap for

Oct 1, 2021, 7:40 PM

So in my code, the [spend,contract_id] is where I specify the path.

spend = WBNB
contract_id = Token I'm buying

You're saying that I should make it:

[spend, BNB, contract_id], where BNB would be the address for BNB.

Or, are you saying I should just buy using BNB (not wrapped) and make it:

[BNB,contract_id]

?

Oct 1, 2021, 7:46 PM

Ill simplyfy

You want to swap from token a to token b

But the liquidity doesn't exist so
First swap token a for bnb then swap that bnb for token b

Oct 1, 2021, 7:49 PM

But what if token a is already bnb? Well, wrapped bnb

Oct 1, 2021, 7:53 PM

Then you can swap directly

Oct 1, 2021, 8:00 PM