Quote from: vjudeu on November 27, 2024, 07:32:59 AM

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only what is necessary to form a working bitcoin chain

Then, just take version 0.1.0, and remove things, which you don't need. For example: instead of "scriptSig" and "scriptPubKey", you only need "sig" and "pubKey", and ECDSA implementation. I guess the bare minimum is hashing, so you can start from SHA-256 implementation (because then, you can form a chain). The next thing is public key cryptography, which means secp256k1 implementation. If you have those two, then you can form the basic chain. If you ignore everything else, then you will have "downgraded soft-fork", where your version will only check P2PK, and accept everything else as valid.

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Anyone has a minimalistic, C++ Implementation of the original bitcoin protocol?

I was trying to do something like that, but it is not yet ready.

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What exactly are you trying to do and what parts of the libraries do you find non-minimalistic and why is that a problem?

I guess it is about recreating the process of making Bitcoin from scratch. Because between empty main function, and the first released version, there are definitely more points, where you have "half-baked coin", and where you can learn, why things are set, the way they are. For example: the bare minimum doesn't need any Script. The bare minimum doesn't need versioning. And there are many other things, which you can remove, and still cover everything, what is described in the whitepaper.

So, to sum up: start from SHA-256 implementation, which will give you just "something mineable, without any public keys". Then, add public keys support. And then, you will have the bare minimum.

And if you want to test some basic concepts, then you can even downgrade it into SHA-1 with secp160k1, or even CRC-32 with some 32-bit elliptic curve, if you want some weaker test network.

This is the most reasonable approach in my opinion

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