Base’s Cobalt upgrade adds another rule to affect token balances
Base’s Cobalt upgrade, scheduled for mainnet Sept. 30 at 18:00 UTC, will let issuers of B20 tokens configure steadiness seizures individually from peculiar switch restrictions. For a token that allows the function, a holder may stay free to switch whereas nonetheless being eligible for administrative reassignment.
B20 is Base’s native ERC-20-compatible token standard, provided in Asset and Stablecoin variants. It already provides directors management over roles and insurance policies governing steadiness actions, and now it’ll additionally govern the executive powers over these balances.
Role assignments establish who can train a selected energy, whereas coverage settings decide which accounts an operation can affect. Changing a token’s guidelines and executing a steadiness operation contain distinct permission checks.
Separate seizure permissions
The new administrative operation, referred to as seizeWithMemo, strikes a specified quantity from a holder to another handle. It preserves complete provide and skips peculiar switch insurance policies and holder allowances.
An issuer should configure which accounts lose their exemption earlier than the operate can take their tokens. The setting, SEIZE_EXEMPT_POLICY, exempts everybody when left unset. Configuring eligibility alone is inadequate: execution requires SEIZE_ROLE, an unpaused seizure operate, a permitted recipient, and enough steadiness.
A separate recipient coverage determines the place the seized tokens can go, and leaving that coverage unset permits any in any other case legitimate vacation spot. The holder’s means to make an peculiar switch doesn’t reply both seizure-policy query.
B20’s present transfer policies test the sender and receiver, plus the executor for sure transfers on another account’s behalf. Administrators can replace these insurance policies. Approving a spender doesn’t take away the checks on the eventual switch, however these peculiar switch permissions are distinct from Cobalt’s seizure guidelines.
B20 additionally already has burnBlocked, which lets a certified caller destroy tokens held by an account denied by the transfer sender policy. Cobalt marks that operate deprecated however retains it callable with its present habits.
That leaves issuers with alternative ways to take away a holder’s steadiness. Reassignment retains the tokens in circulation at another handle, whereas destroying the seized provide requires a subsequent burn. Seizure and burning have separate administrative roles and pause controls.
Base’s status page lists the mainnet upgrade as scheduled, with upkeep from 18:00 to 20:00 UTC. The upgrade overview lists Sepolia as dwell since Sept. 23 and mainnet as delivery on Sept. 30.
The v1.4.2 release adds Cobalt mainnet assist and instructs node operators to upgrade by Sept. 30 at 18:00 UTC.
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