Solana Launches Transaction V1, Increasing Max Transaction Size to 4,096 Bytes

Solana has activated its new 'Transaction V1' format on the mainnet, increasing the maximum transaction size from 1,232 bytes to 4,096 bytes. This update, introduced via SIMD-0385, allows complex operations such as ZK proofs, large multisigs, BLS signatures, and confidential transfers to be executed in a single atomic transaction. While the use of V1 is optional, it simplifies data handling and reduces the need for multiple transaction bundles. The network previously relied on a 1,232-byte limit based on early design constraints, but the new limit was set after considering validator memory processing and network load.