private void ProcessTransferAssetsToUtxo(TransferAssetToUtxoBlock block, ulong registryCombinedBlockHeight) { if (_clientState.IsConfidential()) { bool isToMe = ConfidentialAssetsHelper.IsDestinationKeyMine(block.DestinationKey, block.TransactionPublicKey, _clientState.GetSecretViewKey(), _clientState.GetPublicSpendKey()); if (isToMe) { byte[] otsk = ConfidentialAssetsHelper.GetOTSK(block.TransactionPublicKey, _clientState.GetSecretViewKey(), _clientState.GetSecretSpendKey()); byte[] assetId = ConfidentialAssetsHelper.GetAssetIdFromEcdhTupleCA(block.EcdhTuple, block.TransactionPublicKey, _clientState.GetSecretViewKey()); _dataAccessService.StoreUtxoUnspentOutputs(block.SyncBlockHeight, registryCombinedBlockHeight, block.BlockType, block.RawData.Span, block.TransactionPublicKey, ConfidentialAssetsHelper.GenerateKeyImage(otsk), block.TagId, block.AssetCommitment, block.DestinationKey, 1, assetId); } else { _dataAccessService.StoreUtxoOutput(block.TagId, block.AssetCommitment, block.DestinationKey); } } }
private BlockBase CreateNonQuantitativeTransitionAssetTransferBlock(Account receiver, byte[] assetId, byte[] prevTransactionKey, byte[] prevCommitment, byte[] prevDestinationKey, int ringSize, ulong tagId, out byte[] otsk, out int pos) { if (!_clientState.IsConfidential()) { otsk = null; pos = -1; return(null); } byte[] otskAsset = ConfidentialAssetsHelper.GetOTSK(prevTransactionKey, _clientState.GetSecretViewKey(), _clientState.GetSecretSpendKey()); otsk = otskAsset; byte[] keyImage = ConfidentialAssetsHelper.GenerateKeyImage(otskAsset); byte[] secretKey = ConfidentialAssetsHelper.GetRandomSeed(); byte[] transactionKey = ConfidentialAssetsHelper.GetTrancationKey(secretKey); byte[] destinationKey = _hashCalculation.CalculateHash(receiver.PublicKey); byte[] blindingFactor = ConfidentialAssetsHelper.GetRandomSeed(); byte[] assetCommitment = ConfidentialAssetsHelper.GetAssetCommitment(assetId, blindingFactor); byte[] msg = ConfidentialAssetsHelper.FastHash256(BitConverter.GetBytes(tagId), keyImage, destinationKey, transactionKey, assetCommitment); Random random = new Random(BitConverter.ToInt32(secretKey, 0)); GetCommitmentAndProofs(prevCommitment, prevDestinationKey, ringSize, tagId, random, out int actualAssetPos, out byte[][] assetCommitments, out byte[][] assetPubs); pos = actualAssetPos; UtxoUnspentBlock idCardBlock = _dataAccessService.GetUtxoUnspentBlocksByTagId(_idCardTagId).First(); byte[] otskAffiliation = ConfidentialAssetsHelper.GetOTSK(idCardBlock.TransactionKey, _clientState.GetSecretViewKey(), _clientState.GetSecretSpendKey()); byte[] affiliationBlindingFactor = ConfidentialAssetsHelper.GetRandomSeed(); byte[] affiliationAssetCommitment = ConfidentialAssetsHelper.GetAssetCommitment(idCardBlock.AssetId, affiliationBlindingFactor); GetCommitmentAndProofs(idCardBlock.Output.Commitment, idCardBlock.Output.DestinationKey, ringSize, _idCardTagId, random, out int actualAffiliationPos, out byte[][] affiliationCommitments, out byte[][] affiliationPubs); BorromeanRingSignature borromeanRingSignature = ConfidentialAssetsHelper.GenerateBorromeanRingSignature(msg, affiliationPubs, actualAffiliationPos, otskAffiliation); SurjectionProof assetSurjectionProof = ConfidentialAssetsHelper.CreateAssetRangeProof(assetCommitment, assetCommitments, actualAssetPos, blindingFactor); SurjectionProof affilaitionSurjectionProof = ConfidentialAssetsHelper.CreateAssetRangeProof(affiliationAssetCommitment, affiliationCommitments, actualAffiliationPos, affiliationBlindingFactor); List <TransactionalIncomingBlock> incomingBlocks = _dataAccessService.GetIncomingBlocksByBlockType(BlockTypes.Transaction_IssueAssets); List <IssueAssetsBlock> issueAssetsBlocks = incomingBlocks.Where(b => b.TagId == _idCardTagId).ToList().Select(b => { return((IssueAssetsBlock)_blockParsersRepositoriesRepository.GetBlockParsersRepository(PacketType.Transactional).GetInstance(b.BlockType).Parse(b.Content)); }).ToList(); List <byte[]> rawIdCardAssetIds = issueAssetsBlocks.SelectMany(b => b.IssuedAssetIds).ToList(); SurjectionProof affiliationEvidenceSurjectionProof = ConfidentialAssetsHelper.CreateNewIssuanceSurjectionProof(affiliationAssetCommitment, rawIdCardAssetIds.ToArray(), rawIdCardAssetIds.FindIndex(b => b.Equals32(idCardBlock.AssetId)), affiliationBlindingFactor); NonQuantitativeTransitionAssetTransferBlock block = new NonQuantitativeTransitionAssetTransferBlock { TagId = tagId, KeyImage = _identityKeyProvider.GetKey(keyImage), DestinationKey = destinationKey, TransactionPublicKey = transactionKey, AssetCommitment = assetCommitment, SurjectionProof = assetSurjectionProof, AffiliationCommitment = affiliationAssetCommitment, AffiliationPseudoKeys = affiliationPubs, AffiliationSurjectionProof = affilaitionSurjectionProof, AffiliationBorromeanSignature = borromeanRingSignature, AffiliationEvidenceSurjectionProof = affiliationEvidenceSurjectionProof, EcdhTuple = ConfidentialAssetsHelper.CreateEcdhTupleCA(blindingFactor, assetId, secretKey, receiver.PublicKey), PublicKeys = assetPubs.Select(p => _identityKeyProvider.GetKey(p)).ToArray(), Signatures = ConfidentialAssetsHelper.GenerateRingSignature(msg, keyImage, assetPubs, otskAsset, actualAssetPos) }; FillSyncData(block); FillRawData(block); return(block); }