Jenner is the next BSC upgrade, with three changes for payments, timing and tokens.
Live on testnet since Oct 29. Mainnet is scheduled for Dec 8, 2026, 02:30 UTC, so it isn't on mainnet yet.
Payment Lane
How it works: 5% of each block's gas is reserved for payments as a group. Other transactions can't use that slice, even when it's empty.
What qualifies: nonzero BNB transfers to wallets with no code. Token and stablecoin payments qualify only after governance lists their contracts, and that list starts empty. Governance can raise the share to 10% max.
Why it helps: when blocks get busy, payments still have reserved room instead of being pushed out by other traffic. It covers payments as a group, not any single payment, and fees and ordering don't change.
Millisecond timestamps
How it works: contracts can read block time in milliseconds by calling a precompile at 0x70. block.timestamp still returns seconds.
Why it helps: apps that depend on timing, like quote expiry or auction cutoffs, get a finer clock to work with. Blocks are not any faster.
CAS20
How it works: a token standard built into the protocol, with allowlists, blocklists, pausing and separate mint, burn and seizure roles. It stays BEP-20 compatible.
Why it helps: issuers of stablecoins and tokenized assets get these controls built in, and wallets that already support BEP-20 can work with them.
Token creation opens only after governance appoints an admin, and the controls alone don't make a token legally compliant.
Which of the three matters most for what you're building?
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