To help a Solana swap land during contention, choose a sensible priority fee for the accounts it will change; the base fee is currently 5,000 lamports per signature. A priority fee is an optional extra paid in SOL to improve a transaction’s chance of being scheduled sooner. It cannot guarantee a place in the next block.
Why do only some swaps compete?
Solana uses local fee markets: transactions compete most directly when they need to change the same account. An account is a small record on Solana, and a writable account is one a transaction may change. Transactions that write to the same account can interfere, so the network has to schedule that work carefully.
Imagine a sudden rush to swap through one pool, the account holding that market’s trading state. Those swaps may compete with each other, while a swap using an unrelated pool can face less pressure. A pool is the on-chain market used to trade a particular token pair.
For a first token swap, Byreal is a way to make a trade on Solana while this fee mechanism is in play. The network priority fee is separate from any trading fee charged by a pool or exchange.
What does the bid pay for?
A priority bid sets a price per compute unit, or CU: a measure of the work a transaction may ask Solana to perform. For older transaction formats, the priority fee is the CU price multiplied by the CU limit, rounded up to a whole lamport. A lamport is one-billionth of a SOL.
For example, suppose a swap requests 200,000 CUs and offers 20,000 micro-lamports per CU. A micro-lamport is one-millionth of a lamport, so the priority fee is 4,000 lamports, or 0.000004 SOL. This is an illustrative calculation, not a live fee quote.
The fee uses the requested CU limit, not the work the swap actually uses. An oversized limit can therefore cost more than needed. Solana also charges the transaction fee if the swap fails, so a larger bid is not free insurance.
How does contention affect the result?
The validator scheduling the transaction weighs its reward against its estimated work. The priority fee can help, but a higher total fee does not automatically mean first place. Two swaps can request different amounts of work, and their account access can differ.
One easy-to-miss detail is that a swap can write several accounts, not just the pool’s main state. For example, it may also change the user’s token accounts, which hold the tokens being traded. A fee estimate based on one busy account may miss contention on another account the actual transaction needs.
Priority bidding also does not make unrelated swaps pay a shared congestion surcharge. If demand is concentrated around one pool, the pressure can stay local. But popular activity elsewhere can still use block space, so a high bid improves odds rather than promising instant execution.
What should you check before swapping?
For a first swap through Byreal or another Solana DEX, focus on the transaction’s actual account set and compute estimate. The Byreal SDK is a tool developers can use to build transactions; ordinary users can think of it as part of how an app prepares the on-chain instructions.
Keep this short checklist in mind:
- Check whether the swap’s writable accounts are likely to be busy.
- Use a realistic CU limit; extra requested capacity can raise the fee.
- Compare the priority fee with the swap’s size and urgency.
- Remember that the fee may still be charged if the transaction fails.