Solana completes Alpenglow upgrade to speed transaction settlement

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Solana Alpenglow upgrade

Highlights

Solana completed the Alpenglow upgrade, enabling validators to directly exchange votes and achieve block finality in as little as one or two rounds.
Alpenglow targets a 150-millisecond settlement time under normal conditions, allowing exchanges to credit deposits and merchants to finalize payments more quickly.
Validator votes no longer appear as blockchain transactions, which may reduce reported transaction counts on network dashboards compared to earlier periods.

Upgrade mechanics and settlement target

As reported by CoinDesk, citing the Solana Foundation, the handover from the old system took about 900 milliseconds, with votes from 446 of the network’s 654 participating validators certifying the block used as the starting point.

Under the previous system, validator votes were recorded as transactions on the blockchain and approvals accumulated across successive blocks. Alpenglow allows validators to send votes directly to one another and combine those approvals into certificates, enabling a block to become final after one or two voting rounds.

That finality threshold is the point at which an application can treat a payment as settled. The 150-millisecond figure remains a target in normal network conditions, not a guaranteed time for every payment, and Anza, the company behind Solana’s Agave software, said in a release that some computers receive finality information later than the validators voting directly.

Implications for users and network data

For users, the upgrade means payments and trades can reach full settlement more quickly without requiring changes to existing wallets. Many Solana applications already displayed transactions as confirmed before they were fully locked in, but Alpenglow gives those services a stronger basis for showing that funds have arrived and can be relied on.

That could allow exchanges to credit deposits sooner so customers can trade faster, while merchants accepting stablecoin payments could complete sales without making shoppers wait at the counter for settlement. The improvement is especially relevant for services that need to release funds or goods immediately after receiving payment.

Network dashboards may also show a noticeable change because validator votes no longer appear as blockchain transactions. Services that included those votes in transaction counts may report lower totals, meaning comparisons with earlier activity will need to separate user transactions from the validator votes that previously filled blocks.

In our earlier article on SEON’s expansion in the Philippines, we noted the company is targeting stronger demand for fraud prevention as digital payments and remittances grow under tighter compliance expectations. The report explained that SEON is working with Exist Software Labs to deepen its reach beyond fintech into traditional banks, remittance providers, and commerce, positioning risk controls as a key requirement as transaction volumes rise.

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