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Factory Contract

A smart contract designed to deploy or create other contracts using standardized logic.

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Definition

A smart contract designed to deploy or create other contracts using standardized logic.

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Why it matters

Smart-contract concepts are essential for understanding programmable blockchain applications.

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How it works

The factory contract contains a ‘create’ or ‘create2’ function. When invoked, it reads the bytecode of a template contract and uses it to deploy a new address on the blockchain. The factory can keep a record (an array or mapping) of all addresses it has deployed for easy lookup.

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Real-world example

Uniswap v2 uses a Factory contract to deploy a unique Pair contract for every single token liquidity pool that is created on the platform.

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Advantages

  • Standardizes deployment of related contracts
  • Easily manages and lists created instances
  • Reduces individual deployment complexity

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Limitations

  • Increases gas cost for the factory call
  • Requires careful management of factory security
  • Logic changes require new template contracts

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Common misconceptions

  • People think the factory contract acts as a hub for all child data, but child contracts are independent.
  • Some believe creating contracts via a factory is free, but it still costs substantial gas for the creation operation.
Canonical knowledge ID: glossary:factory-contract