zcash-fpga

Repo for Zcash FPGA projects code and documents. Architecture document is here.

aws

This contains the top / project files for building on AWS (Amazon FPGA)

bittware_xupvvh

This contains the top / project files for building on the Bittware VVH board

ip_cores

These contain custom IP cores used by the projects in this repo.

• Hashing
  • Blake2b - single pipe implementation of blake2b and a pipline-unrolled version for high performance.
  • SHA256 and SHA256d
• Packages and interfaces that are shared
• Fifo implementations
• Blocks for parsing/processing streams, as well as testbench files
• Karabutsa multiplier
• Barret reduction for modulo reduction when the modulus does not allow fast reduction
• Resource arbitrators
• General purpose elliptical curve point modules
  • Supports point multiplication, addition, doubling in Fp and Fp^2

zcash_fpga

This is the top level for the Zcash FPGA. It targets both Xilinx Virtex UltraScale+ FPGA VCU118 Evaluation Kit, and Amazon EC2 F1 Instances.

It optionally contains the following top-level engines (you can optionally include in a build via parameters):

• Equihash verification engine
  • Verifies the equihash solution and difficulty filters
• EC secp256k1 signature verification engine
  • Uses efficient endomorphism to reduce key bit size
  • Signature verification calculates multiple EC point operations in parallel, using a resource-shared single fully pipelined karabutsa multiplier and quick modulo reduction technique
• EC bls12-381 coprocessor
  • Point multiplication in Fp and Fp^2
  • ate Pairing