fix: fix repay with collateral

[sakulstra]

Resolves some issues with the current repay with collateral implementation:

• Excludes pools which are returning 500 errors for swaps involving certain assets (LINK, TUSD)
• Improve slippage estimation for input amounts

[sakulstra]

@defispartan there still seems to be an issue - which weirdly i can only reproduce on ethereum where the flashAmount for some reason is smaller then then maxAmountToPay (reproducible via tenderly).

No idea where it's coming from exactly.

[github-actions]

• Ipfs hash: bafybeigx7cc66dvmi4rf7agnf57wt4o4y2erfjiojmev7ywfhsfci4ecvi
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[github-actions]

📦 Next.js Bundle Analysis

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⚠️ Global Bundle Size Increased

Page	Size (compressed)
global	484.68 KB (🟡 +72 B)

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[defispartan]

I think the same logic is needed for price impact as well. One thing I didn't know until researching further is that price impact and slippage are not the same thing: https://doc.paraswap.network/price-impact-slippage.

When you test a swap with high slippage, you can see that the expected input amount is calculated before price impact is taken into account:

[sirsoth]

Im able to replicate errors on a position with LINK as collateral, unable to repay USDT or DAI

[sirsoth]

Just Error getting txParams

[bojanaave]

There is one case where "Error getting txParams" is visible - it happens when a user wants to swap ETH -> to any other assets. Here are the reproduction steps:
So here are the reproduction steps:

This API POST Request throws error 500 - https://api.paraswap.io/transactions/1/?ignoreChecks=true

1. Supply some amount of ETH
2. Click on the SWAP
3. As Amount type eg. "1" and wait few sec

[foodaka]

is this also related to this issue #786 ?

[sirsoth]

Looks to me to be the same error

[github-actions]

• Ipfs hash: bafybeiee6engkxihgjnmxkvpqhjges7kvngtisia4ox5astvirzpv7sm2u
• Ipfs preview link: https://bafybeiee6engkxihgjnmxkvpqhjges7kvngtisia4ox5astvirzpv7sm2u.ipfs.cf-ipfs.com/

[github-actions]

• Ipfs hash: bafybeigsycdhyfzmbdyfzln4na47kncwn3jjywu4wlpj57x7agwaebr6fe
• Ipfs preview link: https://bafybeigsycdhyfzmbdyfzln4na47kncwn3jjywu4wlpj57x7agwaebr6fe.ipfs.cf-ipfs.com/

[foodaka]

Thanks @defispartan for investigating and running this down