Solana plans to more than triple its transaction byte limit on Wednesday, lifting the cap from 1,232 bytes to 4,096 bytes, according to a CoinDesk report. The point is simple: more complex operations that used to be split across multiple transactions—advanced cryptographic proofs, multi-signature payments, and some confidential transfers—can now fit inside one transaction.
The new format is already live on testnet. Older transaction formats are still staying put, and wallets or apps do not have to upgrade. But services that read on-chain data do need to add support for the new format. If they do not, request failures or wrong priority fee displays could follow.
The upgrade comes through proposals SIMD-0296 and SIMD-0385, and it is separate from the recent Solana governance vote about changing SOL issuance and burn rates. Its goal is to shrink the gap with Ethereum, which does not have a strict transaction byte limit. Solana, by contrast, has long been stuck with a hard 1,232-byte limit for each transaction.