Soul Bound Non-Fungible Token Concept & Implementation

How to Deploy a Soul Bound NFT on Polygon

This guide walks you through setting up, deploying, and minting a Soul Bound Token (SBT) on Polygon, with an option to bridge it to Ethereum. This project serves as an exploration of the feasibility and costs associated with minting SBTs.

1. Project Overview

• Contracts Directory: Contains the actual NFT contract.
• Functionality: Users can claim and burn NFTs, but only the contract owner can create claims.
• Blockchain: Deployed on Polygon, with bridging to Ethereum.
• API: Uses Alchemy for blockchain interactions.

Code found here: https://github.com/AngelLozan/SBT

2. Prerequisites

Before proceeding, ensure you have:

• Node.js installed
• Hardhat installed (npm install --save-dev hardhat)
• Alchemy API Key
• Pinata account for metadata storage
• MATIC for gas fees (Testnet MATIC for Mumbai)

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3. Deployment Steps

Start Local Blockchain

Run a local Hardhat node:

npx hardhat node

Deploy Contract

In a separate terminal, deploy the contract to the Mumbai testnet:

npx hardhat run scripts/deploy.js --network matic

Mint NFT

Run the following command to mint an NFT:

node scripts/mint-nft.js

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4. Metadata and Image Upload

To properly mint NFTs, follow these steps:

1. Upload images to Pinata
2. Assign metadata to each image and upload the metadata folder to Pinata

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5. Testing

Run the Hardhat test suite:

npx hardhat test

To generate a gas report:

GAS_REPORT=true npx hardhat test

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6. Estimating Costs

• Use the Polygon fee tracker to estimate deployment and minting costs.
• Sign up for Web3 Dog Food to receive test MATIC and experiment with minting and bridging.

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7. Additional Hardhat Commands

Use the following Hardhat commands for additional functionality:

npx hardhat help
npx hardhat test
npx hardhat node
npx hardhat run scripts/deploy.js

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8. Next Steps

• Complete the deployment to Mumbai testnet.
• Implement bridging to Ethereum.
• Write more functions to be called by owners.

Following using this repp, you will understand how to deploy and experiment with Soul Bound NFTs on Polygon. Let me know what you think.