v2.0.0-rc.1 release candidate

The API is frozen and later candidates carry fixes only, except the receipt-free and Safe create surface of /fhe-airdrop, which is @beta. Published on the next dist-tag; latest stays on 1.6.0 until 2.0.0.

Signature helperuseMutation Curated

useSignClaimAuthorization

Admin signs the off-chain EIP-712 Claim(address recipient,bytes32 encryptedAmount) message.

Import

@tokenops/sdk/fhe-airdrop/react

Return

{ mutate, mutateAsync, isPending, error, data }

Lifecycle

Signature helper

Description

Sign a v2 Claim(address recipient, bytes32 encryptedAmount, bytes32 dedupId, uint256 deadline) authorization for an ECDSAConfidentialAirdrop instance. The signer must hold SIGNER_ROLE on that instance.

Never sign with an EIP-7702-delegated key. A delegation switches verification to ERC-1271 against the delegate, so every outstanding voucher fails although the key keeps the role. See signClaimAuthorization.

airdrop and chainId come from the hook's own options, so a component supplies only the claim fields.

Under `perDedupId` and `none` the contract enforces no per-recipient ceiling. Every mode consumes the EIP-712 digest, so the exact signature bytes cannot be replayed - but under perDedupId the same ciphertext signed for two different dedupIds is claimable twice, and under none every distinct signature is independently claimable with no on-chain ceiling at all. The signing UI is then the ONLY bound on total payout. See signClaimAuthorization.

Invalidates: nothing. The signature is produced off-chain and lands no transaction, so no cached read moves until the recipient claims.

Signature

@tokenops/sdk/fhe-airdrop/react

function useSignClaimAuthorization(options: AirdropInstanceClientOptions): UseMutationResult<Signature, Error, SignClaimAuthorizationArgs>;

Parameters

Shape of the object you pass to .mutate(args) is the SDK type SignClaimAuthorizationArgs. Inspect the type for the full shape (discriminated unions collapse to a tagged variant at call time).

Want to run a similar shape interactively? The Playground ships 12 ready presets across vesting / airdrop / disperse / faucet — deploy a manager, create a vesting, claim, and run the product equivalents. The deep-link above auto-selects the closest preset to useSignClaimAuthorization; pick another from the dropdown if you'd rather start there.

Example

@tokenops/sdk/fhe-airdrop/react · @example

tsx

const sign = useSignClaimAuthorization({ address: airdropAddress });
const signature = await sign.mutateAsync({ recipient, encryptedAmountHandle, dedupId, deadline });

Pulled directly from the hook's TSDoc block — the same snippet your IDE shows on hover.

Errors

This mutation can reject with SDK-level, product-level, or generic-fallback errors. Product classes carry the offending value as fields — render them inline instead of a generic "transaction failed." See Airdrop v2 › Errors for the per-class recovery table.

Invalidation recipe

After this mutation succeeds, invalidate the queries it affects so consumer UI re-fetches fresh state. The SDK never auto-invalidates — that's a consumer decision (different apps cache different shapes).

patterns/invalidation.ts

import { useQueryClient } from "@tanstack/react-query";

const queryClient = useQueryClient();
const signClaimAuthorization = useSignClaimAuthorization(/* options */);

signClaimAuthorization.mutate(args, {
  onSuccess() {
    // Coarse invalidation: refresh every cached read on this product surface.
    queryClient.invalidateQueries({
      queryKey: ["tokenops-sdk", "fhe-airdrop"],
    });
  },
});