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

# Native Orderbook

OpenGDP includes a high-performance on-chain orderbook implemented as a native precompile at `0xdec0000000000000000000000000000000000000`. It provides capital-efficient stablecoin-to-stablecoin swaps without relying on external AMM pools.

## Use Case: Stablecoin Conversion

A user holds USDC but needs to pay a merchant who only accepts EURC. They call `swapExactAmountIn` on the DEX precompile, and the protocol routes the swap through the `pathUSD` intermediary. The entire operation executes atomically in a single transaction.