Embedded vs Linked Libraries

Embedded library

An embedded library is a library that contains only internal functions.

  • If a smart contract is consuming a library which have only internal functions, then the EVM simply embeds the library into the contract (hardcoded into contract at compile time).

  • Instead of using delegatecall to call a function, it simply uses JUMP statement (normal method call). There is no need to separately deploy library in this scenario.

Linked Library

A linked library is a library that contains public or external functions.

  • The library needs to be deployed as a separate contract, and a unique address will be generated for it upon deployment.

  • This address needs to be linked with calling contract.

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