renew_ens_name
Renew an ENS name or batch of names. Returns the transaction data needed to extend registration.
Unlike registration, renewal is simple — just one transaction with payment. No commit/reveal needed.
Accepts any duration from 1 day up — days, weeks, months, years. ENS protocol has no minimum renewal period; this tool floors at 1 day for safety. Examples: 1 day, 7 days (1 week), 28 days (1 month), 365 days (1 year).
Anyone can renew any name (you don't need to be the owner). This is useful for:
Extending your own names before expiry
Gifting renewal to a friend's name
Protecting valuable names from expiring
Returns exact on-chain pricing from the ETHRegistrarController with a 5% buffer (excess is refunded) — do NOT estimate renewal prices yourself.
For batch renewals (multiple names), all names are bundled into a SINGLE Multicall3 transaction.
Calling this tool never spends money — it only builds an unsigned transaction rendered as a sign-card; nothing happens until the user clicks Sign. So the sign-card IS the confirmation step.
Conversational flow:
User names the specific name(s) ("renew coffee.eth", "renew coffee.eth for 3 months"): call this tool IMMEDIATELY. If no duration was given, use the 1-year default and say so ("built it for 1 year — tell me if you want longer/shorter") — do NOT stop to ask the duration first; they can just say a different one and you rebuild.
User names a BUDGET ("renew coffee.eth for $45", "put 0.02 ETH into it", "I only have ETH for $45"): pass budgetUsd / budgetEth and NO duration. The tool solves the duration from live on-chain pricing — do not work it out yourself (a 4-character name costs ~$160/yr, a 3-character ~$640/yr; the model got the tier wrong live and quoted 26 days for a 4-char name that $45 actually renews for ~100 days). A budget is a HARD CAP: never rebuild above it to "save the name" or reach Active. If the capped renewal leaves the name in grace, the result's budget.summary says so — relay that ONE sentence and hand over the card. Never call this tool more than once for the same budget. Any dollar cost you state comes from budget.summary or price.approxUsd — never from your own ETH/USD conversion.
Every result carries whatThisBuys — the new expiry DATE and days from now. That sentence is what you quote before and AFTER the transaction, never the duration ("locked in for 90 days" was said live about a renewal that bought 2 days: it extends from the ORIGINAL expiry).
Open-ended "renew my names" / "bulk renew" with no list: first call get_wallet_portfolio to find the names, IGNORE every EXPIRED and PREMIUM_AUCTION name (renewing those reverts the whole batch), present a numbered list grouped by urgency, and ask which names + what duration. Only THEN call this tool.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| names | Yes | ENS name or array of names to renew (e.g. "coffee.eth" or ["coffee.eth", "wallet.eth"]) | |
| years | No | DEPRECATED — use duration instead. Number of years (converted to days internally). At most 100, the same ceiling as duration. | |
| duration | No | Duration in days to extend registration (e.g. 7 for 1 week, 28 for a month, 365 for a year). Default: 365. Minimum: 1 day. Maximum: 36500 (100 years). When a budget is also given, the budget wins: the duration is capped to what the budget covers. | |
| budgetEth | No | Spend cap in ETH ("renew X with 0.02 ETH", "I only have 0.05 ETH") — ONLY when the user states an ETH amount. A dollar figure is budgetUsd even when it says ETH ("$1 of eth", "$20 worth of ETH"): never convert dollars to ETH yourself. Same behaviour as budgetUsd. Mutually exclusive with budgetUsd. | |
| budgetUsd | No | Spend cap in USD ("renew X for $45", "put $20 into it"). The tool prices the name(s) on-chain and picks the LONGEST whole number of days whose transaction value fits under this cap — never compute the duration yourself from a budget. Mutually exclusive with budgetEth. |