@TomZ
@TomZ
Offline dumb wallet design How people prefer to use Bitcoin Cash is likely reflected by what people do today. When I look around me the vast majority of people that pay electronically do so by using a bank-card and only a small number use a phone. This raises the question if we can make a secure and useful wallet that follow the form-factor of a bank card. And it turns out that, yes, you can! The challenge here is that your bank-card doesn't have an Internet connection,…
@TomZ
Oracles DeFi (Decentralized Finance) on a blockchain hits one basic problem: everyone has to be able to verify the entire historical chain, even 20 years from now. What this means is that any decision on a transaction has to be also stored on the blockchain. Any smart contract that decides who gets paid based on the weather, on sports events or on things like the price of gold are thus all basically imposible. In Bitcoin Cash we solved this by adding some opcodes which…