Blockchain in Javascript – Signing transactions (Part 4)

Transactions on a blockchain have to be signed with a private key. This makes sure that people can only spend coins if they have the private key of their wallet. In this video we will refactor our Javascript blockchain so that it will only accept signed transactions. We’ll use the secp256k1 elliptic curve to generate […]

Blockchain in Javascript – Mining Rewards & Transactions (Part 3)

Implementing miner rewards and basic transactions in our Javascript based blockchain. Mining rewards steadily introduce new coins into the system. OOPS, I made a small mistake! In the minePendingTransactions() method, you have to pass the hash of the previous block when you’re creating a new Block() instance. This was fixed on GitHub: ► Source code […]

Blockchain in Javascript – Proof of Work (Part 2)

Adding the proof-of-work mechanism to our homemade Javascript blockchain. Proof-of-work will secure our blockchain against spammers and people trying to tamper with our blocks. ► Source code Available on GitHub: https://github.com/SavjeeTutorials/SavjeeCoin

Blockchain in Javascript – Basics (Part 1)

Learn how to write your own Blockchain with JavaScript. In this video I’ll show you what is behind a blockchain by using simple code. It’s not a complete implementation, but enough to understand how blockchains work and how they guarantee that blocks can never be changed. After creating our blockchain we’ll try and tamper with […]
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