Solana v1 raises the maximum transaction payload from 1,232 to 4,096 bytes, roughly a 3.3-fold increase. RPC readers, indexers and fee sponsors that fail to prepare risk either hard failures or silent enforcement of incorrect resource limits. The upgrade is not yet activated on mainnet, but testnet and devnet are already live, giving operators a pre-activation window to update their systems. Minimum reader-capable releases include @solana/kit 8.0.0, @solana/web3.js 3.0.0-rc.3, Rust solana-* 4.2.x, Python solders 0.29.0 and solana-go 1.23.0. Solana is down 3.39% over the past 24 hours and currently sits at rank #7 by market cap.
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