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

# Smart contracts

> Solana program addresses and on-chain components.

ezpz.fi settlement runs on **Solana**. These programs hold market state, USDC vaults, and outcome token mints.

<Note>
  Addresses below are **devnet** deployments. Mainnet addresses will be published before production launch.
</Note>

## Programs

| Program             | Address                                        | Purpose                                       |
| ------------------- | ---------------------------------------------- | --------------------------------------------- |
| **buukie-market**   | `5vua9nxBu9JmqbbQfQ4B82DFunX4FEfr2VAvHuUFAtWu` | Markets, mint/redeem, resolve, disputes, fees |
| **buukie-amm**      | `5DefKySDZeCW4UowZJ7gxjiCkhMutRXvA14XpiMXpnac` | AMM pools, swap, liquidity                    |
| **buukie-parlay**   | `DjBpNef9fpkmD11vcrhBmhpC5AmWqHyQKXcBSGmTXHn6` | Parlay pool, leg resolution, settlement       |
| **buukie-exchange** | `CQH3ZaUnKfcFkZCCuzsCKcfggCcSBbfLuD7c8fYze2vR` | CLOB on-chain settlement (v2)                 |
| **buukie-negrisk**  | *(scaffold)*                                   | Multi-outcome NegRisk events (future)         |

[View on Solana Explorer (devnet)](https://explorer.solana.com/?cluster=devnet)

## Collateral

| Asset           | Devnet mint                                    | Notes                     |
| --------------- | ---------------------------------------------- | ------------------------- |
| **USDC (test)** | `GxsE5rx8gYbGHb3v6ofjfUFRsJcCQq9wtW23gbGpbXs9` | Test mint for devnet only |

## Key on-chain accounts

| Account                | Description                                            |
| ---------------------- | ------------------------------------------------------ |
| **Market**             | Per-market state: status, expiry, outcome mints, vault |
| **USDC vault**         | Holds collateral for a market's positions              |
| **Platform fee vault** | Accumulated platform overround                         |
| **Maker fee intake**   | Per-maker claimable fees                               |
| **AMM pool**           | YES/NO reserves and LS-LMSR state                      |
| **Parlay pool**        | LP-backed parlay collateral                            |

## Verification

All trades, resolutions, and redemptions emit on-chain events indexed by **buukie-indexer**. You can verify any transaction on [Solana Explorer](https://explorer.solana.com) using your custodial wallet address or transaction signature.

## Related

* [Architecture](/concepts/architecture) — on-chain vs off-chain boundaries
* [Outcome tokens](/concepts/outcome-tokens) — SPL token mechanics
* [Order lifecycle](/concepts/order-lifecycle) — settlement flow