ethash

Introduction

A pure-Nim implementation of Ethash, the Ethereum proof of work

Implementation is based on the spec revision 23 (2017-08-03).

Mining

An unoptimized mining CPU backend is available through the compile-time flag -d:ethash_mining. It requires compilation through the C++ backend.

Optimizations

For maximum speed, compile Ethash with -d:release -d:march_native -d:openmp. This will compile Ethash in Nim release mode, with all supported CPU extensions (especially AVX2) and with OpenMP multiprocessing. On MacOS, OpenMP requires installing GCC-7 and can be done through Homebrew.

Original implementation

Original Ethereum implementation is available here.

Warning ⚠ - License notice: the original implementation is under GPLv3 or LGPLv3 and must not be used in this project.

License

Licensed under both of the following:

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license: LICENSE-MIT or http://opensource.org/licenses/MIT