schedule-service-system-contract-skilllisted

# Hedera Schedule Service (HSS) System Contract The Hedera Schedule Service system contract at **`0x16b`** exposes functions for creating and managing scheduled transactions from within Solidity. It supports: - **HIP-755**: Authorizing and signing schedules from contracts - **HIP-756**: Scheduling native HTS token creation (createFungibleToken, createNonFungibleToken, etc.) - **HIP-1215**: Generalized scheduled contract calls — schedule arbitrary calls to any contract (or self) for DeFi automation, vesting, DAO operations ## Quick Reference **Contract address:** `0x16b` **Imports:** ```solidity import {HederaScheduleService} from "@hashgraph/smart-contracts/contracts/system-contracts/hedera-schedule-service/HederaScheduleService.sol"; import {IHRC1215ScheduleFacade} from "@hashgraph/smart-contracts/contracts/system-contracts/hedera-schedule-service/IHRC1215ScheduleFacade.sol"; ``` `HederaScheduleService` is an abstract contract (like `HederaTokenService` for HTS). Inherit it to get `internal` helper functions that handle the low-level calls to `0x16b`. `HederaResponseCodes` is available transitively. **Response codes:** SUCCESS = 22 (`HederaResponseCodes.SUCCESS`). See [references/api.md](references/api.md) for full function list and [Hedera response codes](https://github.com/hashgraph/hedera-protobufs/blob/main/services/response_code.proto). ## Critical: Inheritance Pattern **`IHederaScheduleService` is an empty interface.** Functions are defined in `IHRC755`, `IHR