Blockchain Tutorials

1 Views 2 years ago

End-To-End NFT/ERC-721/Blockchain Collectible tutorial. We deploy some adorable puppies.

Deploy your smart contract to Opensea, end-to-end. The Ultimate/end-to-end tutorial.

1. ValueError: The private key must be exactly 32 bytes long, instead of 0 bytes.

If you get this error, add a "0x" to the start of your metamask private key.
Follow this if you are getting gas estimation errors (But for Rinkeby instead of Kovan):

2 Views 2 years ago

This is a very basic visual introduction to the concepts behind a blockchain. We introduce the idea of an immutable ledger using an interactive web demo. If you are interested in playing with this on your own, it is available online at: code that runs this demo is also on GitHub:

5 Views 2 years ago

馃 Learn how to become a highly paid blockchain dev:

鈦he "ipfs-http-client" dependency in the video is 33.1.1. The current one, as of March 2020, is 42.0.0 and has various modifications. One of them is the "ipfs.add" function, which does not accept a callback function anymore. However, you can use the following code to do the job:

for await (const file of ipfs.add(this.state.buffer)) {
console.log(file); // or process the file