Solana Transaction v1 Upgrade Raises Max Size to 4,096 Bytes
Solana Foundation VP Jacob Creech states Transaction v1 targets September 9 activation, increasing max transaction size from 1,232 to 4,096 bytes with no new fees.
Jacob Creech, Solana Foundation VP of technology, confirmed that Transaction v1 will raise the maximum transaction size from 1,232 bytes to 4,096 bytes, with activation targeted for September 9.
Legacy v0 transaction formats will remain supported, while developers must adopt the v1 format to use the larger size. The change does not introduce any new per-byte fee.
What remains unknown
Exact activation timing and any last-minute delays remain unconfirmed beyond the stated target. Effects on bandwidth use and priority fees during network congestion have not been quantified.