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How to Query Osmosis DEX: A Developer Guide to Cosmos SDK Module Architecture

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Osmosis is the largest decentralized exchange in the Cosmos ecosystem, built not on smart contracts but as a set of native Cosmos SDK modules baked directly into the protocol. Unlike Ethereum-based DEXs, developers cannot call a router or pool contract; instead, exchange logic lives in chain modules such as poolmanager, gamm, and concentrated liquidity, which are queried directly. The chain runs on CometBFT consensus with 5–6 second block times and instant single-block finality, eliminating the reorg risks common to EVM chains. Osmosis exposes three interfaces for developers — Tendermint RPC, LCD/REST, and gRPC — each suited to different tasks, with most teams preferring REST or gRPC for typed module queries. The chain's native token OSMO uses six decimals, denominated on-wire as uosmo, and most assets in its liquidity pools originate from other blockchains via the Inter-Blockchain Communication protocol.

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