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      Solana Launches Transaction V1 Upgrade, Tripling Maximum Transaction Size

      On September 15, 2026, Solana activated its Transaction V1 upgrade on the mainnet, significantly increasing the maximum transaction size from 1,232 bytes to 4,096 bytes. This enhancement, which went live at epoch 1035 around 01:20 UTC, allows for more complex operations, including zero-knowledge proofs and advanced decentralized finance (DeFi) transactions, to be executed in a single atomic transaction.

      The previous transaction size limit was constrained by networking protocols, specifically tied to IPv6 Maximum Transmission Unit constraints. The upgrade was guided by two Solana Improvement Documents, SIMD-0296 and SIMD-0385, which introduced the expanded size and a new message format. Local testing commenced in August 2026, followed by testnet activation on September 1, before the mainnet rollout two weeks later.

      While the new transaction format is optional for senders, existing transaction formats remain supported to ensure compatibility with current applications. However, infrastructure providers, including RPC providers and indexers, will need to update their systems to accommodate the new transaction characteristics, as these changes may disrupt services for wallets and analytics platforms that are unprepared. The upgrade is expected to enhance the functionality of zero-knowledge proofs, large multisig configurations, and confidential transfers, thereby improving the overall efficiency of DeFi operations.

      © 2026 KLEA News. All Rights Reserved. This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.

      Source: KLEA News

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