The perils of developing NFT for OpenSea Marketplace

1. “Unidentified contract”

2. Poor Quality on orphaned OpenSea code examples

  • updating dependencies
  • fixing code here and there
  • trying older node versions and newer ones
  • changing operating systems between Intel based Macs and ARM based Macs and even on a blank Ubuntu node

3. The gap between creating a collection on-site on OpenSea and via importing from a contract

4. “There was a problem processing your request”

  1. Use menu item “Transfer”
  2. List an item and someone else wants to buy your item
/**
* Override isApprovedForAll to auto-approve OS's proxy contract
*/
function isApprovedForAll(address _owner, address _operator) public view override returns (bool isOperator) {
// if OpenSea's ERC721 Proxy Address is detected, auto-return true
if (_operator == address(0x58807baD0B376efc12F5AD86aAc70E78ed67deaE)) {
return true;
}

// otherwise, use the default ERC721.isApprovedForAll()
return ERC721.isApprovedForAll(_owner, _operator);
}

5. The Multi-Token-Standard without being a Multi-Token-Standard

Conclusion:

--

--

--

Ethereum advocate * Full Stack Developer * CTO @ https://token-forge.io & CTO & Co-Founder @ Zizzle.io

Love podcasts or audiobooks? Learn on the go with our new app.

Recommended from Medium

IDE on the Cloud— AWS Cloud9 for me

SAFE 5. 0 — Day 2

GSoC 2018 Final Submission Report

Image result for google summer of code libre health

How to load COCO Keypoint Data with FiftyOne

Add Batman in Your VS Code

Create a Private Cloud (Email, File Storage, Website and Password Manager)

Lining up for the Queue Data Structure

The 100-year Archive and the Data Preservation Explosion — Part One: The Compounding Storage…

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Hagen Hübel

Hagen Hübel

Ethereum advocate * Full Stack Developer * CTO @ https://token-forge.io & CTO & Co-Founder @ Zizzle.io

More from Medium

Anatomy Of an NFT Smart Contract

Metadata in NFT smart contracts

Life After Opensea: Web3 Deserves Better Than This

Souls of Immortal NFTs