Solana Validators Selling Pending-Transaction Access for Up to $4,000 Monthly

Solana validators are accepting monthly payments ranging from 10 SOL ($1,000) up to $4,000 to provide early access to pending transactions, enabling sophisticated traders to front-run and sandwich-attack retail orders on decentralized exchanges, according to Protos reporting of an investigation by Corvus Labs researcher Andrei Vacariu. Unlike Ethereum and Bitcoin, Solana has no public mempool. Most transactions travel directly to the validator scheduled to build the next block without queueing in any public pool. That architectural choice was intended to prevent MEV extraction, but it has instead consolidated MEV opportunities into a tiered access system available only to wealthy traders. With pre-execution visibility, customers running Everstake's software can mirror incoming traffic to Everstake servers before blocks are produced, allowing them to submit their own orders ahead of or immediately after retail trades. Andrei Vacariu stated: "Every trader on Solana hits these slots, can't tell which leaders mirror their traffic, and can't opt out." Everstake claims it uses "filtering mechanisms specifically to prevent this type of activity" and does not encourage front-running or sandwiching. The company repackages access through Blockspace as "stake-weighted quality of service," an institutional service tier available to validators holding over 15,000 SOL staked on the blockchain.