90 lines
2.7 KiB
Go
90 lines
2.7 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 proof
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import "fmt"
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import "math/big"
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import "encoding/hex"
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import "encoding/binary"
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import "github.com/deroproject/derohe/crypto"
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import "github.com/deroproject/derohe/crypto/bn256"
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import "github.com/deroproject/derohe/address"
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import "github.com/deroproject/derohe/transaction"
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//import "github.com/deroproject/derosuite/walletapi" // to decode encrypted payment ID
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// this function will prove detect and decode output amount for the tx
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func Prove(proof string, input_tx string, mainnet bool) (receivers []string, amounts []uint64, payids [][]byte, err error) {
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var tx transaction.Transaction
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addr, err := address.NewAddress(proof)
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if err != nil {
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return
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}
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if !addr.IsDERONetwork() || !addr.IsIntegratedAddress() || !addr.Proof {
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err = fmt.Errorf("Invalid proof ")
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return
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}
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if len(addr.PaymentID) != 8 {
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err = fmt.Errorf("Invalid proof paymentid")
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return
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}
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tx_hex, err := hex.DecodeString(input_tx)
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if err != nil {
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return
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}
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err = tx.DeserializeHeader(tx_hex)
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if err != nil {
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return
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}
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// okay all inputs have been parsed
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amount := binary.LittleEndian.Uint64(addr.PaymentID)
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var x bn256.G1
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x.ScalarMult(crypto.G, new(big.Int).SetInt64(int64(amount)))
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x.Add(new(bn256.G1).Set(&x), addr.PublicKey.G1())
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for k := range tx.Statement.C {
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if x.String() == tx.Statement.C[k].String() {
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astring := address.NewAddressFromKeys((*crypto.Point)(tx.Statement.Publickeylist[k]))
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astring.Mainnet = mainnet
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receivers = append(receivers, astring.String())
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amounts = append(amounts, amount)
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//decode payment id
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output := crypto.EncryptDecryptPaymentID(addr.PublicKey.G1(), tx.PaymentID[:])
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payids = append(payids, output)
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return
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}
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}
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err = fmt.Errorf("Wrong TX Key or wrong transaction")
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return
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}
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