Support for linking libraries during deployment

[ArtificialPB]

Module

ABI

📝 Description

Libraries with public / external functions are deployed as a separate contract. If deploying a contract that depends on such a library, the contract needs to be linked with the library. This is done by replacing a placeholder (e.g. __$7e77f802c8a093aee7d19a899432839085$__) in the bytecode of the contract with the address of the library.

Ideally, we should support two cases:

• deploy both the library and the contract in a single step (deploy call does everything for you)
• deploy library in a separate step and provide an address to deployed library when deploying the contract

See for reference:

• Add function to link binary with reference libraries in wrappers contract deployment hyperledger/web3j#1988
• https://dev.to/liamzebedee/how-to-link-libraries-into-solidity-contracts-generated-by-sol-compiler-34b3