https://www.infoq.com/articles/blockchain-middleware 

揭秘比特币和区块链（五）：深入理解比特币交易的脚本- http://www.infoq.com/cn/articles/deep-understanding-of-bitcoin-transaction-script

https://hackernoon.com/how-to-run-a-blockchain-on-a-deserted-island-with-pen-and-paper-899949ec555b