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Ethereum Blockchain Development with Solidity and Next.js

Smart Contract: Create and Apply for Jobs

Learn to extend our smart contract to allow users to create and apply for jobs.

We'll cover the following...

In this lesson, we’ll focus on adding extra features to our smart contract. Currently, we can create profiles; now we’ll extend this to let users create listings for jobs or apply for them.

Creating a job offer

We’ll begin with the function for creating job offers. Paste the updated code content into the Remix workspace, and then we’ll go through the changes.

Solidity
// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;
import "./enums.sol";
struct CreatorProfile {
    uint id;
    string email;
    string name;
    string tagline;
    string description;
    address creatorAddress;
    bool verified;
    ProfileType profileType;
    uint[] jobOfferIDs;
}
struct ApplicantProfile {
    uint id;
    address applicantAddress;
    string fullname;
    string email;
    string location;
    string bio;
    ProfileType profileType;
    uint[] applicationIDs;
}
struct JobOffer {
    uint id;
    string title;
    string description;
    uint compensation;
    CreatorProfile creator;
    JobApplication[] applications;
}
struct JobApplication {
    uint id;
    uint jobOfferId;
    string  coverLetter;
    ApplicantProfile applicant;
    JobApplicationStatus status;
}

constants.sol

Here, we introduce a new constant for an error message that will be used when the caller attempting to create a new job offer has no creator profile.

enums.sol

In lines 7–11, we introduce a new enum for the status of job applications. This status will be Pending, ...