The "insufficient funds" probably means your arbitrage didn't profit and you ended up with less SOL than you borrowed, so there wasn't enough to repay the loan + fees.
So what i'm saying is the error could be related to the repayment amount. For example, if you borrow 10 SOL, swap to USDC, swap back to SOL, you need to end up with 10 SOL + flash loan fee(depending on the flash loan protocol you're using).
If you only have 9.8 SOL after the swaps, the repay instruction fails with "insufficient funds."
Some other things could be:
The arbitrage opportunity is gone by the time your tx lands. Many MEV bots are capturing arbitrage opportunities in milliseconds. By the time your transaction gets included in the block, the price discrepancy has been arbitraged away.
Cumulative costs may be eating up the profit; the first and second DEX swap fees, flash loan fee (though it varies by protocol), slippage on both swaps. There's a good possibility all of these exceed the arbitrage spread you detected.
You're being frontrun and your tx is being executed against worse prices.
I dont think having Solana in your wallet for fees helps resolve these issues because your arbitrage isn't profitable by the time the transaction executes.
Being profitable with basic flash loan is quite difficult for small-scale retail players because you will need to spend a lot on proper infrastructure to get good results.
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Hmm.
The "insufficient funds" probably means your arbitrage didn't profit and you ended up with less SOL than you borrowed, so there wasn't enough to repay the loan + fees.
So what i'm saying is the error could be related to the repayment amount. For example, if you borrow 10 SOL, swap to USDC, swap back to SOL, you need to end up with 10 SOL + flash loan fee(depending on the flash loan protocol you're using).
If you only have 9.8 SOL after the swaps, the repay instruction fails with "insufficient funds."
Some other things could be:
The arbitrage opportunity is gone by the time your tx lands. Many MEV bots are capturing arbitrage opportunities in milliseconds. By the time your transaction gets included in the block, the price discrepancy has been arbitraged away.
Cumulative costs may be eating up the profit; the first and second DEX swap fees, flash loan fee (though it varies by protocol), slippage on both swaps. There's a good possibility all of these exceed the arbitrage spread you detected.
You're being frontrun and your tx is being executed against worse prices.
I dont think having Solana in your wallet for fees helps resolve these issues because your arbitrage isn't profitable by the time the transaction executes.
Being profitable with basic flash loan is quite difficult for small-scale retail players because you will need to spend a lot on proper infrastructure to get good results.