History
The network has renamed itself, its wallets, and its consensus vocabulary more than once. This page keeps the old material and maps old terms to current ones, so links and articles from earlier eras still make sense.
last reviewed 2026-08-08
Timeline
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2017–2019
Blockstack and the SEC-qualified offering
The project began as Blockstack, building decentralized identity and apps anchored to Bitcoin. In July 2019 its Reg A+ token offering became the first SEC-qualified token sale in the United States. The company later argued that with a sufficiently decentralized network, STX should no longer be treated as a security under that framework.
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2020
Blockstack becomes Stacks
The project rebranded to Stacks ahead of the 2.0 launch. Old documentation, repositories, and articles under the Blockstack name describe the same lineage.
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2021-01-14
Stacks 2.0 mainnet: PoX, Stacking, Clarity
Proof of Transfer launched: miners commit BTC to mine STX blocks, and holders who locked STX (called Stacking, with a capital S) earned that BTC as reward. Clarity, the decidable smart contract language, shipped with it. A stacker meant both a community member and someone locking STX for consensus.
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2021
NFT firsts
First came the Badges, then Boom introduced minting your own NFTs, closely followed by the first NFT auction by This Is Number One, the Boomboxes, and Punks on Stacks. Many projects followed; Gamma and TradePort remain the active marketplaces.
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2021–2023
The directory era
An ecosystem of DEXes, pools, mining communities, DAOs, and data dashboards grew fast, and this site grew with it as a link directory. Some of that era's projects (Syvita Guild, CityCoins, Catamaran swaps, several dashboards) have since wound down; period articles from Messari, Forbes, and Bitcoin Magazine capture how it looked at the time.
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2024-10
Nakamoto upgrade (Epoch 3.0)
Fast blocks decoupled from Bitcoin block times, and Stacks transactions gained Bitcoin finality. The Ultimate Stacks Nakamoto Guide remains a good period reference.
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2024-12
sBTC launches
A programmable, Bitcoin-backed asset maintained by a decentralized signer set, bringing BTC itself into Stacks contracts. Now documented at stacks.co/sbtc.
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2026-07-30
Epoch 4.0 and PoX-5: Bitcoin staking
At Bitcoin block
960230the Epoch 4.0 hard fork activated the pox-5 contract, first of the Satoshi Upgrades. BTC on Bitcoin L1 (or sBTC), paired with locked STX, can now earn self-custodial BTC yield through Bitcoin Bonds, rolling out in phases from the institutional Genesis Bond. Locking STX alone continues as STX-only staking. Cooldown cycles were removed and pooled participation streamlined.
Old terms, current terms
Docs and interfaces across the ecosystem are still catching up to Epoch 4.0 wording. When you meet an older term, read it as follows.
| Then | Now |
|---|---|
| Stacking | STX-only staking: locking STX to support consensus and earn rewards. |
| stacker | Staker (when it meant someone locking STX). As a name for a community member it lives on informally. |
| pox-4 contract | pox-5 contract at the genesis boot address. |
| Blockstack | Stacks (renamed 2020). |
| Hiro Wallet | Leather (renamed 2023). |
| lockstacks.com | earn.leather.io (Leather Earn). |
| stacks.org | stacks.foundation. |
| velar.co | velar.com. |
| sbtc.tech | stacks.co/sbtc. |
Period reading
Kept for historical context, not as current guidance. External links from these eras rot; that is part of why this page exists.
- 2021–2022
- 2023
- 2024