Add API GET /assets/transfers/{assetid}/{address}

src/main/java/org/qora/api/resource/AssetsResource.java

@@ -623,6 +623,50 @@ public class AssetsResource {
 		}
 	}
 
+	@GET
+	@Path("/transfers/{assetid}/{address}")
+	@Operation(
+		summary = "Asset transfers for specific asset and address combination",
+		responses = {
+			@ApiResponse(
+				description = "Asset transactions",
+				content = @Content(
+					array = @ArraySchema(
+						schema = @Schema(
+							implementation = TransferAssetTransactionData.class
+						)
+					)
+				)
+			)
+		}
+	)
+	@ApiErrors({
+		ApiError.INVALID_ADDRESS, ApiError.INVALID_ASSET_ID, ApiError.REPOSITORY_ISSUE
+	})
+	public List<TransferAssetTransactionData> getAssetTransfers(@Parameter(
+		ref = "assetid"
+	) @PathParam("assetid") int assetId, @PathParam("address") String address, @Parameter(
+		ref = "limit"
+	) @QueryParam("limit") Integer limit, @Parameter(
+		ref = "offset"
+	) @QueryParam("offset") Integer offset, @Parameter(
+		ref = "reverse"
+	) @QueryParam("reverse") Boolean reverse) {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+			if (!repository.getAssetRepository().assetExists(assetId))
+				throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_ASSET_ID);
+
+			if (!Crypto.isValidAddress(address))
+				throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_ADDRESS);
+
+			return repository.getTransactionRepository().getAssetTransfers(assetId, address, limit, offset, reverse);
+		} catch (ApiException e) {
+			throw e;
+		} catch (DataException e) {
+			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.REPOSITORY_ISSUE, e);
+		}
+	}
+
 	@POST
 	@Path("/order/delete")
 	@Operation(

src/main/java/org/qora/data/PaymentData.java

@@ -10,9 +10,9 @@ import javax.xml.bind.annotation.XmlAccessorType;
 public class PaymentData {
 
 	// Properties
-	protected String recipient;
-	protected long assetId;
-	protected BigDecimal amount;
+	private String recipient;
+	private long assetId;
+	private BigDecimal amount;
 
 	// Constructors
 

src/main/java/org/qora/repository/TransactionRepository.java

@@ -6,6 +6,7 @@ import java.util.Map;
 import org.qora.api.resource.TransactionsResource.ConfirmationStatus;
 import org.qora.data.transaction.GroupApprovalTransactionData;
 import org.qora.data.transaction.TransactionData;
+import org.qora.data.transaction.TransferAssetTransactionData;
 import org.qora.transaction.Transaction.TransactionType;
 
 public interface TransactionRepository {
@@ -52,12 +53,26 @@ public interface TransactionRepository {
 	 * Returns list of transactions relating to specific asset ID.
 	 * 
 	 * @param assetId
+	 * @param confirmationStatus
 	 * @param limit
 	 * @param offset
 	 * @param reverse
 	 * @return list of transactions, or empty if none
 	 */
-	public List<TransactionData> getAssetTransactions(int assetId, ConfirmationStatus confirmationStatus, Integer limit, Integer offset, Boolean reverse)
+	public List<TransactionData> getAssetTransactions(long assetId, ConfirmationStatus confirmationStatus, Integer limit, Integer offset, Boolean reverse)
+			throws DataException;
+
+	/**
+	 * Returns list of TRANSFER_ASSET transactions relating to specific asset ID/address combination.
+	 * 
+	 * @param assetId
+	 * @param address
+	 * @param limit
+	 * @param offset
+	 * @param reverse
+	 * @return list of transactions, or empty if none
+	 */
+	public List<TransferAssetTransactionData> getAssetTransfers(long assetId, String address, Integer limit, Integer offset, Boolean reverse)
 			throws DataException;
 
 	/**

src/main/java/org/qora/repository/hsqldb/transaction/HSQLDBTransactionRepository.java

@@ -22,6 +22,7 @@ import org.qora.api.resource.TransactionsResource.ConfirmationStatus;
 import org.qora.data.PaymentData;
 import org.qora.data.transaction.GroupApprovalTransactionData;
 import org.qora.data.transaction.TransactionData;
+import org.qora.data.transaction.TransferAssetTransactionData;
 import org.qora.group.Group;
 import org.qora.repository.DataException;
 import org.qora.repository.TransactionRepository;
@@ -446,7 +447,7 @@ public class HSQLDBTransactionRepository implements TransactionRepository {
 	}
 
 	@Override
-	public List<TransactionData> getAssetTransactions(int assetId, ConfirmationStatus confirmationStatus, Integer limit, Integer offset, Boolean reverse)
+	public List<TransactionData> getAssetTransactions(long assetId, ConfirmationStatus confirmationStatus, Integer limit, Integer offset, Boolean reverse)
 			throws DataException {
 		TransactionType[] transactionTypes = new TransactionType[] {
 			ISSUE_ASSET, TRANSFER_ASSET, CREATE_ASSET_ORDER, CANCEL_ASSET_ORDER
@@ -531,6 +532,43 @@ public class HSQLDBTransactionRepository implements TransactionRepository {
 		}
 	}
 
+	@Override
+	public List<TransferAssetTransactionData> getAssetTransfers(long assetId, String address, Integer limit, Integer offset, Boolean reverse)
+			throws DataException {
+		String sql = "SELECT creation, tx_group_id, reference, fee, signature, sender, recipient, amount FROM TransferAssetTransactions "
+				+ "JOIN Transactions USING (signature) "
+				+ "JOIN Accounts ON public_key = sender "
+				+ "WHERE asset_id = ? AND ? IN (account, recipient) "
+				+ "ORDER by creation ";
+
+		sql += (reverse == null || !reverse) ? "ASC" : "DESC";
+		sql += HSQLDBRepository.limitOffsetSql(limit, offset);
+
+		List<TransferAssetTransactionData> assetTransfers = new ArrayList<>();
+
+		try (ResultSet resultSet = this.repository.checkedExecute(sql, assetId, address)) {
+			if (resultSet == null)
+				return assetTransfers;
+
+			do {
+				long timestamp = resultSet.getTimestamp(1, Calendar.getInstance(HSQLDBRepository.UTC)).getTime();
+				int txGroupId = resultSet.getInt(2);
+				byte[] reference = resultSet.getBytes(3);
+				BigDecimal fee = resultSet.getBigDecimal(4).setScale(8);
+				byte[] signature = resultSet.getBytes(5);
+				byte[] creatorPublicKey = resultSet.getBytes(6);
+				String recipient = resultSet.getString(7);
+				BigDecimal amount = resultSet.getBigDecimal(8);
+
+				assetTransfers.add(new TransferAssetTransactionData(timestamp, txGroupId, reference, creatorPublicKey, recipient, amount, assetId, fee, signature));
+			} while (resultSet.next());
+
+			return assetTransfers;
+		} catch (SQLException e) {
+			throw new DataException("Unable to fetch asset-transfer transactions from repository", e);
+		}
+	}
+
 	@Override
 	public List<TransactionData> getPendingTransactions(Integer txGroupId, Integer limit, Integer offset, Boolean reverse) throws DataException {
 		String[] txTypesNeedingApproval = stream(Transaction.TransactionType.values())