Sim IDX templates let you bootstrap fully-featured indexing apps in minutes. Each template ships with a production-ready listener contract, events, and REST API logic so you can focus on your custom business logic instead of boilerplate.

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Contract Decoder

Quickly decode and index data emitted by any smart contract. The template scaffolds a listener that listens to function calls and events (pre-configured for the Uniswap V3 Factory) and surfaces the decoded results via an API.

sim init --template=contract-decoder

Step-by-step Guide

Complete walkthrough showing how to configure the contract-decoder template to decode any smart contract, using the Moonbirds NFT contract as an example.

sim-idx-example-contract-decoder

View the complete template source code and example implementation on GitHub.

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Uniswap V3 In-Range LPs

Index Uniswap V3 liquidity provision events and query which positions are in-range at any block. The template exposes an /lp-snapshot endpoint that returns all active LP positions for a given pool.

sim init --template=univ3-lp

sim-idx-example-univ3-lp