This is probably the best mini implementation I've seen so far. The code is hosted at https://github.com/Haseeb-Qureshi/lets-build-a-blockchain https://github.c

This is probably the best mini implementation I've seen so far. The code is hosted at https://github.com/Haseeb-Qureshi/lets-build-a-blockchain https://github.com/Haseeb-Qureshi/lets-build-a-blockchain He's missed one thing though, which a lot of these small implmentations miss, its the code for chain re-org. https://en.bitcoin.it/wiki/Chain_Reorganization https://en.bitcoin.it/wiki/Chain_Reorganization This is a crucial piece of code that figures out which chain is correct if 1 or more blocks arrive that have a greater proof of work than your current best chain. But otherwise, a very good attempt.