124 lines
4.1 KiB
Go
124 lines
4.1 KiB
Go
// 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 "strings"
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import "encoding/hex"
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import "github.com/deroproject/derohe/cryptography/crypto"
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import "github.com/deroproject/derohe/rpc"
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import "github.com/deroproject/derohe/cryptography/bn256"
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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, ring_string [][]string, mainnet bool) (receivers []string, amounts []uint64, payload_raw [][]byte, payload_decoded []string, err error) {
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var tx transaction.Transaction
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addr, err := rpc.NewAddress(strings.TrimSpace(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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args := addr.Arguments
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amount := uint64(0)
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var shared_key crypto.Hash
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if args.Has(rpc.RPC_VALUE_TRANSFER, rpc.DataUint64) { // this service is expecting value to be specfic
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amount = args.Value(rpc.RPC_VALUE_TRANSFER, rpc.DataUint64).(uint64)
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} else {
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err = fmt.Errorf("Invalid proof.")
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return
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}
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if args.Has(rpc.DataHash, rpc.DataHash) { // this service is expecting value to be specfic
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shared_key = args.Value(rpc.DataHash, rpc.DataHash).(crypto.Hash)
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} else {
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err = fmt.Errorf("Invalid proof. missing key part")
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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.Deserialize(tx_hex)
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if err != nil {
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return
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}
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// now lets decode the ring
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for i := range ring_string {
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for j := range ring_string[i] {
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var addr *rpc.Address
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if addr, err = rpc.NewAddress(ring_string[i][j]); err != nil {
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return
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}
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tx.Payloads[i].Statement.Publickeylist = append(tx.Payloads[i].Statement.Publickeylist, (*bn256.G1)(addr.PublicKey))
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}
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}
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// okay all inputs have been parsed
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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 t := range tx.Payloads {
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for k := range tx.Payloads[t].Statement.C {
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if x.String() == tx.Payloads[t].Statement.C[k].String() {
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astring := rpc.NewAddressFromKeys((*crypto.Point)(tx.Payloads[t].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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//crypto.EncryptDecryptUserData(addr.PublicKey.G1(), tx.Payloads[t].RPCPayload)
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crypto.EncryptDecryptUserData(crypto.Keccak256(shared_key[:], tx.Payloads[t].Statement.Publickeylist[k].EncodeCompressed()), tx.Payloads[t].RPCPayload)
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// skip first byte as it is not guaranteed, even rest of the bytes are not
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payload_raw = append(payload_raw, tx.Payloads[t].RPCPayload[1:])
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var args rpc.Arguments
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if err := args.UnmarshalBinary(tx.Payloads[t].RPCPayload[1:]); err == nil {
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payload_decoded = append(payload_decoded, fmt.Sprintf("%s", args))
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} else {
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payload_decoded = append(payload_decoded, err.Error())
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}
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return
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}
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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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