Blockchain-related APIs

Blockchain, a revolutionary technology that came about with Bitcoin in 2009, is essentially a ledger system that’s distributed across many computers and doesn’t rely on a single, central authority. It keeps a careful record of all transactions. The setup of this system is such that if you want to change one transaction record after the fact, you have to change all the records that came after it. This makes the records virtually unchangeable, a quality known as immutability.

One of the great things about blockchain is that it has changed how we can interact with each other directly (peer-to-peer), without needing to trust a central authority. Blockchain isn’t just for digital currency transactions such as Bitcoin, either. It’s also used for more complex things such as managing a “smart contract,” which is a program that runs on a blockchain, as we see with Ethereum.

However, while blockchain is very strong in its...