Attaching a bitcoin transaction fee can be a tricky business. Depending on the wallet or service you are using, it can be hard to know the exactly how much to pay for a quick confirmation. Paying too much can be a waste, while too little can delay a transaction greatly.
21 Inc. is a privately-held bitcoin hardware company founded by CEO Balaji S. Srinivasan. The company launched in May 2015, after the largest fundraising round in bitcoin history, and makes hardware products for the bitcoin niche. The main goal is “putting a bitcoin miner in every device and in every hand.”
The company started selling its first hardware product last September, the 21 Computer, which quickly rose to the #1 server product sold on Amazon.
21 then launched Bitnodes, which is being developed to estimate the size of the Bitcoin network by finding all the reachable nodes. These connection points make up the core of the bitcoin network. The free service is a handy reference for