Today I kept working on the initial setup, and I got the basic structure of the execution flow going. So far, I implemented the stack and a first version of the memory, and then implemented the first OPCODEs, namely STOP and ADD. I started working towards PUSH1, which requires a bit more setup than what I have going for now.
For the stack, I initially decided to use a Buffer array, but then I started writing the opcode runner functions, and I immediately noticed how inconvenient it would be because of how I need to manipulate the stack items. So I decided to rewrite the stack with a simple js bigint array, which will hold any value pushed into the stack just fine.
For the memory, I am using a single Buffer, allocating, reading and writing data directly onto it. I am not sure if this is the best approach but it makes sense for now. As I said, the implementation is still really simple so changing it later will be easy anyway.
I also added some utilities like an ERRORS enum.
That's all for today :D