Alpenglow went live on Solana mainnet on October 21, 2026, replacing TowerBFT (Solana Foundation via Altcoin Buzz). Solana's official Alpenglow page puts the finality change at roughly 12.8 seconds to a 150 millisecond target, about 85x faster. If you swap SOL to native BTC on Chainflip, you can time each stage of your own swap on Chainflip Scan and see how much of that speedup reached you.
What you need
A Solana wallet holding SOL, plus a little extra for network fees
A receiving address on your destination chain (a Bitcoin address for SOL to BTC, for example)
Chainflip Scan and a Solana block explorer open in separate tabs
About five minutes, longer if your destination is Bitcoin
Step 1: Open the swap app and pick SOL as the source
What to do: Go to the Chainflip swap app, set SOL on Solana as the source asset and choose your destination asset. If you want to exit SOL entirely, the page on how to sell SOL for other native assets lists the supported pairs.
What you will see: A quote showing the expected output, fees and an estimated duration for the whole route.
Common mistake: Reading the estimated duration as a Solana number. It covers the full swap, including the payout on the destination chain.
Step 2: Send the SOL deposit and record the timestamp
What to do: Enter your receiving address, confirm the quote and send SOL to the deposit address the app generates. Copy the Solana transaction signature and note the block time your explorer shows.
What you will see: Your wallet will likely report success within a second or two.
Common mistake: Treating a wallet's "confirmed" status as final. Solana exposes processed, confirmed and finalized commitment levels, and Chainflip acts only on the last one.
Step 3: Watch validators witness the deposit
What to do: Search your deposit address or transaction on Chainflip Scan and follow the swap status.
Chainflip's deposit witnessing docs list Solana with a safety margin of "finalized" (about 12 seconds) on a block duration of about 0.4 seconds. Validators submit witness extrinsics to the State Chain only once a deposit is final under that definition. Chainflip runs a decentralized custody model secured by validators, so crediting a deposit that later rolls back would mean paying out against funds the vaults never received.
Alpenglow changes how fast Solana reaches that finalized state, so in principle the Solana-side wait shrinks from about 12 seconds toward the 150ms target. Early readings were mixed: Altcoin Buzz reported a 202ms reading on the Alpenglow dashboard at launch, with Anza's Max Resnick expecting 150 to 200 milliseconds. Cointelegraph saw 6.6-second finality on the same dashboard at press time.
What you will see: Scan shows the deposit as received once enough validators have witnessed it and the witness lands on the State Chain.
Common mistake: Assuming Alpenglow makes this step instant. Validators still have to observe the deposit independently and get their witnesses into a block on Chainflip's State Chain, which takes time regardless of Solana.
Step 4: Calculate your deposit-to-swap time
What to do: Subtract your Solana transaction's block time from the time Scan shows the swap executed. That gap is your deposit-to-swap time, the part of the route Alpenglow can actually affect.
We set out to publish before-and-after SOL deposit-to-swap times around October 21. We did not have a clean, like-for-like dataset when this went out, so we are not quoting a speedup figure. We would rather not guess one.
What the docs do tell us: the finality wait before Alpenglow was about 12 seconds, and it always sat alongside witnessing, State Chain inclusion and swap execution. Even if that slice fell to near zero, the total could not shrink 85x.
What you will see: A deposit-to-swap figure in seconds that you can compare against your own older swaps on Scan.
Common mistake: Comparing swaps of very different sizes or routes. Larger swaps can execute in chunks across several blocks, which stretches execution time for reasons unrelated to Solana.
Step 5: Check the destination leg
What to do: Track the payout on the destination chain's explorer using the address you entered in Step 2.
What you will see: Payout speed depends entirely on the destination. A payout to Arbitrum or back to Solana lands quickly, while a swap to buy native BTC waits on Bitcoin blocks, a leg covered in our breakdown of Bitcoin settlement speed on Chainflip. If you prefer to start from a wallet, the Phantom guide to swapping Solana to native Bitcoin covers the same route.
Common mistake: Blaming Solana for a slow BTC payout. Alpenglow has no effect on Bitcoin's block time.
Troubleshooting
Deposit not visible on Scan after a minute: Check that the Solana explorer shows your transaction as finalized and that it went to the exact deposit address generated for this swap.
Wrong asset sent: A SOL deposit channel expects native SOL, not USDC or USDT on Solana. Open a channel for the asset you actually hold.
Swap time looks similar to before October 21: That is expected. Solana finality is one component, and witnessing, State Chain inclusion, execution and payout still take their share.
Deposit too small: Check the minimum shown in the swap app before sending, since tiny deposits may not be processed as a swap.
So, did our swaps get faster?
Solana finality got dramatically faster, and the Solana-side wait inside a Chainflip SOL deposit should shrink with it. The total SOL swap speed you experience moved far less than 85x, because validator witnessing, State Chain blocks, execution and the destination chain all sit in the same path.
The most direct way to see the effect is to measure it on your own swaps. Open the Chainflip swap app, send a SOL deposit and time each stage on Chainflip Scan.
Resources
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Website - Explore Chainflip
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FAQ
What is Solana Alpenglow?
Alpenglow is Solana's new consensus protocol, which replaced TowerBFT on mainnet on October 21, 2026. Solana's official page describes the finality change as roughly 12.8 seconds to a 150 millisecond target.
How long does Chainflip wait before crediting a SOL deposit?
Chainflip validators wait for Solana's finalized commitment before a deposit counts as final. The Chainflip docs list this as about 12 seconds, and validators then submit witnesses to the State Chain.
Did Alpenglow make Chainflip SOL swaps 85x faster?
No. Solana finality is only one part of a swap. Validator witnessing, State Chain inclusion, swap execution and the payout on the destination chain also take time, so total swap time cannot shrink by the same factor.
Why does a SOL to BTC swap still take minutes?
The payout leg runs on Bitcoin, where block times are far longer than on Solana. Alpenglow speeds up the Solana deposit side but has no effect on how quickly Bitcoin confirms the output.
