# Stacking STX

Stacking is the process of locking STX tokens to support the network's consensus and earn BTC rewards. If you aren't familiar with how stacking works, read the [Stacking](https://github.com/stacks-network/docs/blob/master/docs/learn/block-production/stacking.md) and [Stackers and Signing](https://github.com/stacks-network/docs/blob/master/docs/learn/block-production/signing.md) concept guides first.

Stacking utilizes the `pox-4` contract. You can view it on the [Explorer](https://explorer.hiro.so/txid/SP000000000000000000002Q6VF78.pox-4?chain=mainnet) and review the detailed [stacking contract walkthrough](https://docs.stacks.co/operate/broken-reference) to understand what each function does.

### Definitions and Roles

* **Stacker**: an entity locking their STX to earn PoX rewards. This is a broad term including solo stackers and delegators.
* **Solo stacker**: an entity that locks their own STX and runs a signer (or collaborates with one). They don't receive delegation.
* **Delegator**: a stacker who delegates their STX to a pool operator. They don't run a signer.
* **Pool operator**: an entity that accepts delegated STX and manages the stacking process. A pool operator runs a signer (or collaborates with one). The pool operator and signer address may be different.
* **Signer**: an entity running the stacks-signer software that participates in block validation.

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The pool operator and signer are often the same entity but may use different Stacks addresses. This distinction is covered in the [Key and Address Rotation](https://docs.stacks.co/operate/stacking-stx/key-and-address-rotation) guide.
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### Guides

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[**Solo Stacking**](https://docs.stacks.co/operate/stacking-stx/solo-stacking)

If you meet the minimum STX threshold and want to stack independently. Covers how to start stacking, extend your lock period, increase your position, and stop.
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[**Stack with a Pool**](https://docs.stacks.co/operate/stacking-stx/stack-with-a-pool)

If you want to delegate your STX to a pool operator. Covers how to delegate, increase your delegation, revoke, and stop stacking.
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[**Operate a Pool**](https://docs.stacks.co/operate/stacking-stx/operate-a-pool)

If you want to accept delegated STX and manage the stacking process. Covers how to accept delegations, commit aggregated STX, and increase committed amounts.
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[**Generate a Signer Signature**](https://docs.stacks.co/operate/stacking-stx/generate-signer-signature)

Both solo stacking and delegated stacking require signer signatures. This guide covers all signature generation methods: stacks-signer CLI, stacks.js, Leather Earn, Degen Lab's stacking.tools, and hardware wallets.
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[**Key and Address Rotation**](https://docs.stacks.co/operate/stacking-stx/key-and-address-rotation)

How to rotate your signer key, Bitcoin reward address, and pool operator key. Includes recommendations for key separation and security.
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If you do not meet the minimum amount of STX to solo stack, you can [delegate your STX to a pool operator](https://docs.stacks.co/operate/stacking-stx/stack-with-a-pool) and have them stack on your behalf. This is the most common stacking scenario.

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The minimum stacking threshold is dynamic and can be found at the [pox endpoint](https://api.mainnet.hiro.so/v2/pox) under `min_threshold_ustx` (1 STX = 1,000,000 uSTX).
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