Clarity Contract Implementation

Guide

This guide offers three different levels of implementation for the Reputation Framework and NFT Minting contract, based on the user’s familiarity with Clarity and blockchain development. Each level outlines a different approach for deploying and interacting with the contract on the Stacks blockchain.

Level 1: Beginner (Using Explorer to Deploy)

As a non-developer or beginner, you can still deploy and interact with a smart contract using the Stacks Explorer without writing code.

Step-by-Step Guide:

  1. Access Stacks Explorer:

    • Go to explorer.stacks.co.

    • Make sure to switch to the Testnet if you are testing your contract before deploying on Mainnet.

  2. Prepare the Contract:

    • Use a pre-written contract or a contract provided to you (like the Reputation and NFT Minting contract).

    • Example contract is available here.

  3. Connect Wallet:

    • Click on Connect Wallet on the top right corner of the Stacks Explorer.

    • Use a compatible wallet like Hiro Wallet to connect to your account.

  4. Deploy a Contract:

    • Navigate to the Contracts section and click on Deploy Contract.

    • Copy and paste the pre-written contract (e.g., a Clarity contract for Reputation and NFT Minting).

    • Give your contract a unique name (e.g., reputation-nft).

    • Set the Contract Address (your Stacks address).

    • Deploy the contract using your wallet.

  5. Interact with the Contract:

    • Once the contract is deployed, use the Stacks Explorer to call functions like add-reputation-event and mint-nft.

    • You can interact with the contract directly from the explorer by clicking on your contract and choosing the function to call.

Level 2: Intermediate (Clarity Developer)

As someone with a moderate understanding of Clarity, you are familiar with the structure of Clarity smart contracts and can create and deploy contracts.

Step-by-Step Guide:

  1. Set Up Your Development Environment:

    • Install Stacks CLI to deploy and interact with smart contracts locally.

    npm install -g @stacks/cli

  2. Write Your Contract:

    • Create a contract file (e.g., reputation-nft.clar), which defines the reputation event system and NFT minting logic.

    Example code:

    (define-data-var user-reputations (map (string-ascii 50) uint) {})
(define-non-fungible-token reputation-nft uint)

(define-public (add-reputation-event (user-id (string-ascii 50)) (event-value uint))
  (begin
    (map-set user-reputations user-id (+ (get user-reputations user-id) event-value))
    (ok user-id)
  )
)

(define-public (mint-nft (user-id (string-ascii 50)) (event-id uint))
  (begin
    (nft-mint? reputation-nft event-id tx-sender)
    (ok user-id)
  )
)

  3. Deploy the Contract to Testnet:

    • Use the Stacks CLI to deploy the contract.

    stx deploy reputation-nft.clar <YOUR-PRIVATE-KEY> --testnet

    Make sure to replace <YOUR-PRIVATE-KEY> with your testnet wallet’s private key.

  4. Interact with the Contract:

    • Once the contract is deployed, you can call its public functions using the CLI.

    stx call <CONTRACT-ADDRESS> reputation-nft add-reputation-event <USER-ID> <EVENT-VALUE> --testnet

  5. Testing the Contract:

    • Test the contract using a local test environment such as the Clarinet tool, which simulates the blockchain locally.

    clarinet test

Level 3: Advanced (Full Stack Developer)

As an experienced developer, you are proficient with multiple programming languages and blockchain development. In this case, you’ll want to fully customize your contract, integrate with a front-end, and deploy with a more advanced workflow.

Step-by-Step Guide:

  1. Set Up Full Development Environment:

    • Install the Stacks CLI and Clarinet for smart contract development, testing, and deployment.

    npm install -g @stacks/cli
npm install -g @clarinet

  2. Write Advanced Smart Contracts:

    • Create a Clarity contract that not only handles reputation events but also adds additional logic such as batch minting, endorsements, or custom scoring mechanisms.

    Example for batch minting and endorsement management:

    (define-data-var user-reputations (map (string-ascii 50) uint) {})
(define-non-fungible-token reputation-nft uint)

;; Add Reputation Event with endorsement logic
(define-public (add-reputation-event (user-id (string-ascii 50)) (event-value uint) (endorsement bool))
  (begin
    (if endorsement
      (map-set user-reputations user-id (+ (get user-reputations user-id) (* event-value 2)))
      (map-set user-reputations user-id (+ (get user-reputations user-id) event-value))
    )
    (ok user-id)
  )
)

;; Batch Mint NFTs
(define-public (batch-mint-nft (user-ids (list 10 (string-ascii 50))) (event-ids (list 10 uint)))
  (begin
    (map for user-ids
      (fn (user-id)
        (nft-mint? reputation-nft (get event-ids i) user-id)
      )
    )
    (ok true)
  )
)

  3. Build and Deploy Smart Contracts:

    • Use Clarinet to build and deploy the contract in a test environment, and then move to deploying on Testnet or Mainnet using the Stacks CLI.

    clarinet build
stx deploy reputation-nft.clar <YOUR-PRIVATE-KEY> --mainnet

  4. Integrate with a Front-End:

    • Build a full-stack application using React or Next.js to allow users to interact with your contract.

    • Use Stacks.js to create contract calls from your front-end.

    Example integration using Stacks.js:

    import { makeContractCall, stringAsciiCV, uintCV } from '@stacks/transactions';
import { StacksMainnet } from '@stacks/network';

const addReputationEvent = async (userId, eventValue) => {
  const txOptions = {
    contractAddress: 'SP3JVG6ZYX42KP29E',
    contractName: 'reputation-nft',
    functionName: 'add-reputation-event',
    functionArgs: [stringAsciiCV(userId), uintCV(eventValue)],
    senderKey: 'YOUR-PRIVATE-KEY',
    network: new StacksMainnet(),
  };

  const transaction = await makeContractCall(txOptions);
  console.log(transaction);
};

  5. End-to-End Testing and Monitoring:

    • Use tools like Postman for API testing and Grafana for monitoring the smart contract performance in a production environment.

Conclusion

This guide provides a tiered approach to implementing Clarity contracts based on your experience level. Whether you’re a beginner using the Stacks Explorer or an advanced developer building custom smart contracts and integrating them with a full-stack app, you can deploy and manage smart contracts for reputation systems and NFT minting on the Stacks blockchain.

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