Perpetual Onchain Slots — Harberger tax mechanics on Ethereum with Superfluid streaming.
Every slot has a price. Holders self-assess and pay continuous tax. Anyone can buy any slot at the posted price. Resources flow to whoever values them most.
- Self-assessment — Slot holders set their own price
- Continuous tax — Pay tax proportional to your price via Superfluid streams
- Always for sale — Anyone can buy at the posted price, instantly
- No squatting — Holding costs money, so only active users hold slots
| Package | Version | Description |
|---|---|---|
| @0xslots/contracts |  |
Contract ABIs and addresses for use with viem |
| @0xslots/sdk |  |
Type-safe SDK for querying subgraph data |
| Contract | Address | Note |
|---|---|---|
| SlotsHub (proxy) | 0x774776d0f693eB7718b67f7938541D5bbB5f92D0 |
Main entry point |
| MetadataModule | 0xe96e9105994A8691338eaf0fDc50c02277949521 |
Slot metadata |
| Default Currency | USND | Native Superfluid stablecoin |
| Contract | Address | Note |
|---|---|---|
| SlotsHub (proxy) | 0x268cfaB9ddDdF6A326458Ae79d55592516f382eF |
Main entry point |
| Slots (beacon impl) | Cloned per Land | Created by SlotsHub |
| SlotsStreamSuperApp (beacon impl) | Cloned per Land | Tax distributor |
| Network | Endpoint |
|---|---|
| Arbitrum | https://api.studio.thegraph.com/query/958/0-x-slots-arb/version/latest |
| Base Sepolia | https://api.studio.thegraph.com/query/958/0-x-slots-base-sepolia/version/latest |
Superfluid · ERC-721 · Foundry · Solidity · OpenZeppelin · The Graph
by adcommune