Documentation

Fast Pool Documentation

Last updated: March 03, 2026

What is Fast Pool?

Fast Pool is a stacking pool built on the Stacks blockchain. It lets users delegate their STX tokens to participate in Proof‑of‑Transfer (PoX) stacking without running a node. It uses a smart contract as pool manager. Fast Pool handles reward distribution, cycle tracking, and provides transparency through reporting.

Key Features

  • Non‑custodial: Users keep control of their STX; only a delegation transaction is required.
  • Low minimum: Anyone can join regardless of balance.
  • Transparent management: All pool operations are governed by on‑chain Clarity contracts.

Smart Contracts Delegation Addresses

The following smart contracts are the Pool Administrators. Users can delegate to these addresses.

These contracts implement the logic for locking STX and extending the stacking period.

Addresses

Fast Pool's reward flow uses a small set of public addresses. You can verify any cycle on-chain by following the BTC from the reward addresses to the proxy, then watching the distributor contract pay out members in sBTC on Stacks.

BTC reward addresses — where Bitcoin rewards arrive each cycle:

Proxy address — consolidates BTC from the reward addresses before it is bridged to sBTC for distribution on Stacks:

sBTC deposit addresses — taproot addresses the proxy sends BTC to so it gets minted as sBTC on Stacks. Two are currently in use:

Stacks distributor address — the Stacks principal that pays members in sBTC:

Source Code & Tools

The core Clarity contracts and utilities are available in these repositories:

https://github.com/friedger/clarity-stacking-pools

https://github.com/friedger/clarity-trustless-pool/

Feel free to browse the code, audit the contracts, or fork for your own pool.