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a2173ef80a
* Add another hash domain for HeavyHash * Add a xoShiRo256PlusPlus implementation * Add a HeavyHash implementation * Replace our current PoW algorithm with oPoW * Change to pow hash to keccak256 * Fix genesis * Fix tests Co-authored-by: Elichai Turkel <elichai.turkel@gmail.com>
38 lines
781 B
Go
38 lines
781 B
Go
package pow
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import (
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"encoding/binary"
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"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
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"math/bits"
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)
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type xoShiRo256PlusPlus struct {
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s0 uint64
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s1 uint64
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s2 uint64
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s3 uint64
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}
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func newxoShiRo256PlusPlus(hash *externalapi.DomainHash) *xoShiRo256PlusPlus {
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hashArray := hash.ByteArray()
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return &xoShiRo256PlusPlus{
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s0: binary.LittleEndian.Uint64(hashArray[:8]),
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s1: binary.LittleEndian.Uint64(hashArray[8:16]),
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s2: binary.LittleEndian.Uint64(hashArray[16:24]),
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s3: binary.LittleEndian.Uint64(hashArray[24:32]),
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}
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}
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func (x *xoShiRo256PlusPlus) Uint64() uint64 {
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res := bits.RotateLeft64(x.s0+x.s3, 23) + x.s0
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t := x.s1 << 17
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x.s2 ^= x.s0
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x.s3 ^= x.s1
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x.s1 ^= x.s2
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x.s0 ^= x.s3
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x.s2 ^= t
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x.s3 = bits.RotateLeft64(x.s3, 45)
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return res
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}
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