[bnastic]

Indeed. Although I don't know what precisions are required in crypto products, in traditional trading an 8 byte double is quite enough - the price submitted will have to be rounded to the instrument's precision anyway (e.g. most spot FX products are rounded to 5 decimal places).

With a caveat here, after a very quick look at the code: The price here is defined as long double, which can be different among platforms... My Mac/clang says that long double is still 8 bytes, Linux on that same arm64 machine says it's 16 bytes (and I'm not sure what that's mapped to these days - 80bit FPU instructions, or some Float128 representation)