refactor(react-sdk): use batchDecryptBalancesAsMutationOptions factory (#204)

* refactor(react-sdk): use batchDecryptBalancesAsMutationOptions factory

useBatchDecryptBalancesAs was the only delegation hook inlining its
mutation key and function instead of using the corresponding SDK
options factory.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: regenerate react-sdk API report

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(sdk): prevent concurrent contract extensions from dropping addresses

When two allow() calls with different contracts ran concurrently, the
second could start from stale credentials after the first's extend
promise resolved and was nulled. Cache the last extend result so
subsequent calls use it as the base, preserving all added addresses.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* revert: remove #lastExtendResult from credentials manager

Reverts the concurrent extension caching (cee34b8) to keep
this branch's diff minimal. Formatting-only changes from the linter.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ghermet

packages/react-sdk/etc/react-sdk.api.md

@@ -859,7 +859,7 @@ export function useAllow(options?: UseMutationOptions<void, Error, Address[]>):
 export function useApproveUnderlying(config: UseZamaConfig, options?: UseMutationOptions<TransactionResult, Error, ApproveUnderlyingParams, Address>): _$_tanstack_react_query0.UseMutationResult<TransactionResult, Error, ApproveUnderlyingParams, `0x${string}`>;
 
 // @public
-export function useBatchDecryptBalancesAs(tokens: ReadonlyToken[], options?: UseMutationOptions<Map<Address, bigint>, Error, BatchDecryptAsOptions>): _$_tanstack_react_query0.UseMutationResult<Map<`0x${string}`, bigint>, Error, BatchDecryptAsOptions, unknown>;
+export function useBatchDecryptBalancesAs(tokens: ReadonlyToken[], options?: UseMutationOptions<Map<Address, bigint>, Error, BatchDecryptBalancesAsParams>): _$_tanstack_react_query0.UseMutationResult<Map<`0x${string}`, bigint>, Error, _$_zama_fhe_sdk0.BatchDecryptAsOptions, unknown>;
 
 // @public
 export function useBatchTransferFee(feeManagerAddress: Address, options?: Omit<UseQueryOptions<bigint>, "queryKey" | "queryFn">): _$_tanstack_react_query0.UseQueryResult<bigint, Error>;

packages/react-sdk/src/delegation/use-batch-decrypt-balances-as.ts

@@ -1,7 +1,11 @@
 "use client";
 
 import { useMutation, type UseMutationOptions } from "@tanstack/react-query";
-import { ReadonlyToken, type Address, type BatchDecryptAsOptions } from "@zama-fhe/sdk";
+import type { Address, ReadonlyToken } from "@zama-fhe/sdk";
+import {
+  batchDecryptBalancesAsMutationOptions,
+  type BatchDecryptBalancesAsParams,
+} from "@zama-fhe/sdk/query";
 
 /**
  * Batch decrypt confidential balances as a delegate across multiple tokens.
@@ -20,11 +24,10 @@ import { ReadonlyToken, type Address, type BatchDecryptAsOptions } from "@zama-f
  */
 export function useBatchDecryptBalancesAs(
   tokens: ReadonlyToken[],
-  options?: UseMutationOptions<Map<Address, bigint>, Error, BatchDecryptAsOptions>,
+  options?: UseMutationOptions<Map<Address, bigint>, Error, BatchDecryptBalancesAsParams>,
 ) {
-  return useMutation<Map<Address, bigint>, Error, BatchDecryptAsOptions>({
-    mutationKey: ["zama.batchDecryptBalancesAs", ...tokens.map((t) => t.address)] as const,
-    mutationFn: async (params) => ReadonlyToken.batchDecryptBalancesAs(tokens, params),
+  return useMutation<Map<Address, bigint>, Error, BatchDecryptBalancesAsParams>({
+    ...batchDecryptBalancesAsMutationOptions(tokens),
     ...options,
   });
 }