Steven Barclay 266a7ccea4 Add+enable service to mint/verify Equihash proofs of work ... Add an abstract base class, 'ProofOfWorkService', for the existing PoW implementation 'HashCashService' and a new 'EquihashProofOfWorkService' PoW implementation based on Equihash-90-5 (which has 72 byte solutions & 5-10 MB peak memory usage). Since the current 'ProofOfWork' protobuf object only provides a 64-bit counter field to hold the puzzle solution (as that is all Hashcash requires), repurpose the 'payload' field to hold the Equihash puzzle solution bytes, with the 'challenge' field equal to the puzzle seed: the SHA256 hash of the offerId & makerAddress. Use a difficulty scale factor of 3e-5 (derived from benchmarking) to try to make the average Hashcash & Equihash puzzle solution times roughly equal for any given log-difficulty/numLeadingZeros integer chosen in the filter. NOTE: An empty enabled-version-list in the filter defaults to Hashcash (= version 0) only. The new Equihash-90-5 PoW scheme is version 1.		2021-12-07 09:35:44 +01:00
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main/java/bisq/common	Add+enable service to mint/verify Equihash proofs of work	2021-12-07 09:35:44 +01:00
test/java/bisq/common	Add+enable service to mint/verify Equihash proofs of work	2021-12-07 09:35:44 +01:00