# Base Learn - 3

> Base Learn Consul Role Codes 

**Published by:** [timurlenk](https://paragraph.com/@timurlenk/)
**Published on:** 2025-09-19
**Categories:** base
**URL:** https://paragraph.com/@timurlenk/base-learn-3

## Content

Mappings Pin NFT Contract Code: // SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.23; interface ISubmission { function getApprovedRecords() external view returns (string[] memory); function addRecord(string memory _albumName) external; function getUserFavorites( address _address ) external view returns (string[] memory); function resetUserFavorites() external; } contract Submission is ISubmission { mapping(address => string[]) public userFavorites; function getApprovedRecords() external pure override returns (string[] memory) { string[] memory approved = new string[](9); approved[0] = "Thriller"; approved[1] = "Back in Black"; approved[2] = "The Bodyguard"; approved[3] = "The Dark Side of the Moon"; approved[4] = "Their Greatest Hits (1971-1975)"; approved[5] = "Hotel California"; approved[6] = "Come On Over"; approved[7] = "Rumours"; approved[8] = "Saturday Night Fever"; return approved; } function addRecord(string memory _albumName) external override { userFavorites[msg.sender].push(_albumName); } function getUserFavorites( address _address ) external view override returns (string[] memory) { return userFavorites[_address]; } function resetUserFavorites() external override { delete userFavorites[msg.sender]; } }Inheritance NFT Contract Code:// SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.23; interface IEmployee { function idNumber() external returns (uint); function managerId() external returns (uint); } interface ISalaried is IEmployee { function annualSalary() external returns (uint); } interface IHourly is IEmployee { function hourlyRate() external returns (uint); } interface ISalesPerson is IHourly {} interface IEngineeringManager is ISalaried {} interface IInheritanceSubmission { function salesPerson() external returns (address); function engineeringManager() external returns (address); } contract SalesPerson is ISalesPerson { function hourlyRate() external pure override returns (uint) { return 20; } function idNumber() external pure override returns (uint) { return 55555; } function managerId() external pure override returns (uint) { return 0; } } contract EngineeringManager is IEngineeringManager { function annualSalary() external pure override returns (uint) { return 200_000; } function managerId() external pure override returns (uint) { return 11111; } function idNumber() external pure override returns (uint) { return 0; } } contract InheritanceSubmission is IInheritanceSubmission { SalesPerson private _salesPerson; EngineeringManager private _engineeringManager; constructor() { _salesPerson = new SalesPerson(); _engineeringManager = new EngineeringManager(); } function salesPerson() external view override returns (address) { return address(_salesPerson); } function engineeringManager() external view override returns (address) { return address(_engineeringManager); } }Structs Pin NFT Contract Code:// SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.23; interface ISubmission { struct Car { string make; string model; string color; uint numberOfDoors; } function addCar( string calldata _make, string calldata _model, string calldata _color, uint _numberOfDoors ) external; function updateCar( uint _index, string calldata _make, string calldata _model, string calldata _color, uint _numberOfDoors ) external; function getUserCars(address _user) external view returns (Car[] memory); function getMyCars() external view returns (Car[] memory); function resetMyGarage() external; } contract Submission is ISubmission { mapping(address => Car[]) private garages; function addCar( string calldata _make, string calldata _model, string calldata _color, uint _numberOfDoors ) external override { Car memory newCar = Car({ make: _make, model: _model, color: _color, numberOfDoors: _numberOfDoors }); garages[msg.sender].push(newCar); } function updateCar( uint _index, string calldata _make, string calldata _model, string calldata _color, uint _numberOfDoors ) external override { Car storage carToUpdate = garages[msg.sender][_index]; carToUpdate.make = _make; carToUpdate.model = _model; carToUpdate.color = _color; carToUpdate.numberOfDoors = _numberOfDoors; } function getUserCars( address _user ) external view override returns (Car[] memory) { return garages[_user]; } function getMyCars() external view override returns (Car[] memory) { return garages[msg.sender]; } function resetMyGarage() external override { delete garages[msg.sender]; } }

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