Permit
How the permit token feature enables EIP-2612 signature-based ERC-20 approvals on DALP assets, removing the need for a separate approval transaction.
The permit token feature implements EIP-2612 signature-based approvals on the asset. Instead of submitting a separate approval transaction before spending, a holder signs a permit message off chain and submits it with the spending transaction in one call. The feature reduces approval friction for integrators and removes the failed-because-not-yet-approved error class.
For the architecture reference, see Permit.
When it attaches
Almost every system template attaches permit. See the system templates catalog.
What you configure
Nothing during asset creation. The feature has no operator-configurable parameters. The Asset Designer marks it as self-contained.
What you operate
After deployment, the feature runs without operator action:
- Holders sign permits off chain through their wallet. Wallets supporting EIP-2612 expose a signature flow for the permit message.
- Integrators submit the signed permit with the spending transaction. The asset contract verifies the signature, applies the approval, and executes the transfer in one call.
- No explicit operator step is required. The feature is part of the asset contract's standard behaviour after attachment.
Operating considerations
- Permits include a nonce, deadline, and EIP-712 domain separator. Replayed permits are rejected on chain.
- Permits do not bypass compliance modules. Identity verification, country restrictions, allow-lists, and transfer approval all evaluate normally on the resulting transfer.
- The permit signature is per-holder per-spender per-nonce per-deadline. A single permit cannot authorise multiple spenders or operations.
Troubleshooting
| What you see | What to check |
|---|---|
| Permit submission fails with "deadline passed" | The signed permit included a deadline in the past. Sign a fresh permit. |
| Wallet does not offer permit signing | Confirm the wallet supports EIP-2612 signing. Older wallets may require a fallback to standard approve-then-transfer. |
| Permit accepted but transfer rejected | The transfer hit a compliance module check unrelated to the permit. Inspect the configured compliance modules. |
Read next
- Permit architecture
- System templates catalog
- Token permits API for the developer integration reference.
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