> ## Documentation Index
> Fetch the complete documentation index at: https://docs.x402layer.cc/llms.txt
> Use this file to discover all available pages before exploring further.

# Positions & Accounts

> How stake positions, vaults, and on-chain accounts are structured in the Singularity Engine.

Everything in the Singularity Engine is on-chain Anchor state. Understanding the accounts makes the rest of the docs click.

## A "position" = one stake account per role

Each wallet has **one position per role** — a Program-Derived Address (PDA) seeded by your wallet and the role:

```
stake account PDA = ["stake", your_wallet, role]
```

So a single wallet can hold up to three positions at once — Compute, Validator, and Yield — each tracked independently with its own amount, status, and reward checkpoints.

| Field                       | Meaning                                               |
| --------------------------- | ----------------------------------------------------- |
| `amount`                    | \$SGL currently staked in this position               |
| `status`                    | `active`, `unstaking`, or `slashed`                   |
| `staked_at`                 | When the position was opened                          |
| `unlock_at`                 | Absolute time you can withdraw (set when you unstake) |
| `reward_per_token_paid`     | Your USDC reward checkpoint                           |
| `sgl_reward_per_token_paid` | Your \$SGL reward checkpoint                          |

The reward checkpoints are how the engine pays you only for distributions made **after** you staked — see [How Rewards Work](/staking/rewards/overview).

## The vaults

Staked tokens never sit in a wallet the platform controls. They live in **program-owned vaults** whose authority is a PDA, so only the program can move them — and only back to you:

| Vault                    | Holds                                          |
| ------------------------ | ---------------------------------------------- |
| **Stake vault**          | All staked \$SGL principal                     |
| **Reward vault (USDC)**  | USDC rewards waiting to be claimed             |
| **Reward vault (\$SGL)** | \$SGL rewards waiting to be claimed            |
| **Penalty vault**        | Slashed \$SGL (tamper penalties), pending burn |

This separation is what makes staking [non-custodial](/staking/safety/non-custodial): your principal and the platform's reward deposits are distinct, and the program only releases principal to the original staker after a cooldown.

## Config

A single `StakingConfig` account holds the live parameters — minimums, cooldowns, and the authority keys. These are adjustable on-chain (no redeploy), so the network can tune economics over time. The current values are listed on each [Staker Type](/staking/types/overview) page.