Added API call GET /transactions/reference/{reference} for looking up a transaction by its reference

src/main/java/org/qortal/api/resource/TransactionsResource.java

@@ -71,7 +71,7 @@ public class TransactionsResource {
 	@ApiErrors({
 		ApiError.INVALID_SIGNATURE, ApiError.TRANSACTION_NO_EXISTS, ApiError.REPOSITORY_ISSUE
 	})
-	public TransactionData getTransaction(@PathParam("signature") String signature58) {
+	public TransactionData getTransactionBySignature(@PathParam("signature") String signature58) {
 		byte[] signature;
 		try {
 			signature = Base58.decode(signature58);
@@ -112,7 +112,7 @@ public class TransactionsResource {
 	@ApiErrors({
 		ApiError.INVALID_SIGNATURE, ApiError.TRANSACTION_NO_EXISTS, ApiError.REPOSITORY_ISSUE, ApiError.TRANSFORMATION_ERROR
 	})
-	public String getRawTransaction(@PathParam("signature") String signature58) {
+	public String getRawTransactionBySignature(@PathParam("signature") String signature58) {
 		byte[] signature;
 		try {
 			signature = Base58.decode(signature58);
@@ -137,6 +137,46 @@ public class TransactionsResource {
 		}
 	}
 
+	@GET
+	@Path("/reference/{reference}")
+	@Operation(
+		summary = "Fetch transaction using transaction reference",
+		description = "Returns transaction",
+		responses = {
+			@ApiResponse(
+				description = "a transaction",
+				content = @Content(
+					schema = @Schema(
+						implementation = TransactionData.class
+					)
+				)
+			)
+		}
+	)
+	@ApiErrors({
+		ApiError.INVALID_REFERENCE, ApiError.TRANSACTION_NO_EXISTS, ApiError.REPOSITORY_ISSUE
+	})
+	public TransactionData getTransactionByReference(@PathParam("reference") String reference58) {
+		byte[] reference;
+		try {
+			reference = Base58.decode(reference58);
+		} catch (NumberFormatException e) {
+			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_REFERENCE, e);
+		}
+
+		try (final Repository repository = RepositoryManager.getRepository()) {
+			TransactionData transactionData = repository.getTransactionRepository().fromReference(reference);
+			if (transactionData == null)
+				throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.TRANSACTION_NO_EXISTS);
+
+			return transactionData;
+		} catch (ApiException e) {
+			throw e;
+		} catch (DataException e) {
+			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.REPOSITORY_ISSUE, e);
+		}
+	}
+
 	@GET
 	@Path("/block/{signature}")
 	@Operation(