86 lines
2.8 KiB
Go
86 lines
2.8 KiB
Go
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// Copyright 2017-2021 DERO Project. All rights reserved.
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// Use of this source code in any form is governed by RESEARCH license.
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// license can be found in the LICENSE file.
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// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package crypto
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// this file implements serialization/deserialization of balances from the chain
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//import "fmt"
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import "encoding/binary"
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//import "github.com/romana/rlog"
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// import "github.com/deroproject/derohe/cryptography/bn256"
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// this structure is used to store balance in the balance tree
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type NonceBalance struct {
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NonceHeight uint64 // stores nonce height
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Balance *ElGamal // store homomorphic balance
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}
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func (x *NonceBalance) checknil() {
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if x == nil {
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panic("Cannot be NIL")
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}
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}
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func (x *NonceBalance) Marshal() (output []byte) {
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x.checknil()
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var tmp [binary.MaxVarintLen64]byte
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size := binary.PutUvarint(tmp[:], x.NonceHeight)
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output = append(output, tmp[:size]...)
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output = append(output, x.Balance.Serialize()...)
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// fmt.Printf("serialized to %x nonceheight %d\n", output,x.NonceHeight)
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// fmt.Printf("serialized bo %x nonceheight %d\n", x.Balance.Serialize(), x.NonceHeight)
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return
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}
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func (x *NonceBalance) Serialize() []byte {
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return x.Marshal()
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}
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// any error should panic, because we can no longer do anything
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func (x *NonceBalance) Unmarshal(buf []byte) *NonceBalance {
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x.checknil()
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var size int
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x.NonceHeight, size = binary.Uvarint(buf[:])
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if size <= 0 {
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panic("buf too small or value larger than 64 bits")
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}
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// fmt.Printf("buf %x nonceheight %d, size %d bufsize %d\n",buf,x.NonceHeight, size, len(buf)-size)
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x.Balance = new(ElGamal).Deserialize(buf[size:])
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return x
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}
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func (x *NonceBalance) Deserialize(buf []byte) *NonceBalance {
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return x.Unmarshal(buf)
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}
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func (x *NonceBalance) Nonce() uint64 {
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x.checknil()
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return x.NonceHeight
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}
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// used to avoid some processing costs during verification
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func (x *NonceBalance) UnmarshalNonce(buf []byte) {
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x.checknil()
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var size int
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x.NonceHeight, size = binary.Uvarint(buf[:])
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if size <= 0 {
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panic("buf too small or value larger than 64 bits")
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}
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}
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