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How to understand script.cpp and its interpreter.I understand register and postfix operation. I want to understand how script is parsed into machine code.Can i write hello world such as only pushing value into the stack.
Original bitcoin core has one script.cpp.where is interepreter for it?I want to write hello world compiler to understand this.?
Answers
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I want to understand how script is parsed into machine code.
Unlike Ethereum, Script isn't compiled. It's interpreted, like Javascript. The opcodes are evaluated on-the-fly.
Can I write hello world such as only pushing value into the stack?
Maybe try entering
0x0c 0x48656c6c6f20776f726c6421
to https://matiu.github.io/opcodes-playground/? (0x0c is the length of the text, as a push operation)
You mean where in the source code in the original Bitcoin v0.1 source code was the script interpreter? It was in script.cpp: https://github.com/bitcoin/bitcoin/blob/v0.1.5/script.cpp#L44L806
– Pieter Wuille – 2019-02-03T19:48:29.210