# Scheduler (/docs/guides/evm/precompiles/scheduler)

| Property           | Value                                        |
| ------------------ | -------------------------------------------- |
| Implementation     | `SchedulerPrecompile`                        |
| Solidity interface | `IScheduler`                                 |
| Address            | `0x000000000000000000000000000000000000080f` |
| Status             | Deployed                                     |

This precompile replaces raw reads of Scheduler storage with a stable EVM
interface. It lets contracts inspect whether and when runtime work is
scheduled without decoding Scheduler storage or acquiring permission to modify
the schedule.

## Views [#views]

| Function                                     | Replaces                              |
| -------------------------------------------- | ------------------------------------- |
| `getIncompleteSince()`                       | `Scheduler.IncompleteSince`           |
| `getScheduledCall(uint64 when,uint32 index)` | One entry of `Scheduler.Agenda`       |
| `getScheduledCallCount(uint64 when)`         | The bounded agenda length for a block |
| `getRetry(uint64 when,uint32 index)`         | `Scheduler.Retries`                   |
| `getTaskAddress(bytes32 taskId)`             | `Scheduler.Lookup`                    |

Returning one agenda entry at a time keeps execution bounded and avoids an
unbounded array result.

## State-changing operations [#state-changing-operations]

The runtime configures `Scheduler.ScheduleOrigin` as Root. Scheduler extrinsics
therefore have no typed EVM operation: a precompile must not manufacture Root
or bypass the top-level Scheduler authorization check.

The returned agenda entry contains stable metadata rather than a SCALE-encoded
runtime call or origin.

Source: [`scheduler.sol`](https://github.com/RaoFoundation/subtensor/blob/main/precompiles/src/solidity/scheduler.sol)