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Smart Contract Development with Solidity
Interfaces
Code from video: https://solidity-by-example.org/interface/
You can access the video content in Turkish prepared by İTÜ Blockchain here: https://www.youtube.com/watch?v=QZDvZD-lczM&list=PLby2HXktGwN4Cof_6a8YwlMrboX8-hs73&index=17
Interfaces allow contracts (for example, token contracts) that have different working logic but do the same job to have a common standard, so that someone who wants to work with these contracts writes a single code according to this standard instead of writing code specific to each contract.
You can interact with other contracts by declaring an Interface.
Interfaces:
- Cannot have any functions implemented
- Can inherit from other interfaces
- Declared functions must be external
- Cannot declare state variables
- Cannot declare a constructor
Standards such as ERC20, ERC721, ERC1155 are actually defined as an interface.
Resources:
You can find detailed further information from Solidity Official documentation (in English): https://docs.soliditylang.org/en/v0.8.15/contracts.html#interfaces
https://github.com/itublockchain/web3-bootcamp/tree/master/1x14_Interfaces
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