Solana’s “million-payments-a-second” AI system can leave sellers unpaid even after they deliver

A customer using a Solana payment channel can stop buying AI services before the channel has finished paying for them. If the operator goes silent in between, the customer needs a way to recover the remaining deposit, while the merchant needs its last bill to reach the blockchain before the recovery window closes.

That division of risk sits behind Solana Foundation’s Sept. 3 payment-channel announcement, which reported more than one million payments per second through a proxy using 100,000 unique wallets. The system lets agents spend against a prepaid ceiling through signed messages, reducing the need for a separate blockchain transaction for every delivery.

The customer funds the channel, the merchant supplies the service, and the operator runs the payment process. Each finances a different part of the interval between authorization and collection: customer deposits, operator advances of SOL for fees and refundable account rent, and merchant service awaiting on-chain payment.

A warning in the Foundation-linked benchmark template makes that interval consequential: restarting its default in-memory store can forfeit vouchers accepted but not yet settled.

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