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Use LogRxRouteDecoder in AppProvider

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Janez T
2026-03-10 08:43:58 +01:00
parent a8e31bb2e8
commit d675ce18dd
9 changed files with 225 additions and 42 deletions
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44
lib/utils/log_rx_route_decoder.dart
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@@ -4,11 +4,13 @@ import '../models/contact.dart';
class DecodedLogRxRoute {
final int payloadType;
final int pathDescriptor;
final List<int> pathBytes;
final int hashSize;
const DecodedLogRxRoute({
required this.payloadType,
required this.pathDescriptor,
required this.pathBytes,
required this.hashSize,
});
@@ -63,21 +65,49 @@ class LogRxRouteDecoder {
}
if (rawPacketData.length <= index) return null;
final pathLen = rawPacketData[index++];
if (rawPacketData.length < index + pathLen) return null;
final pathBytes = rawPacketData.sublist(index, index + pathLen);
final hashSize = inferHashSize(
pathBytes,
preferredHashSize: preferredHashSize,
);
final pathDescriptor = rawPacketData[index++];
final pathMode = (pathDescriptor & 0xFF) >> 6;
final pathByteLen = pathMode == 0
? pathDescriptor
: descriptorByteLength(pathDescriptor);
if (pathByteLen == null || rawPacketData.length < index + pathByteLen) {
return null;
}
final pathBytes = rawPacketData.sublist(index, index + pathByteLen);
final hashSize = pathMode == 0
? inferHashSize(pathBytes, preferredHashSize: preferredHashSize)
: (descriptorHashSize(pathDescriptor) ??
inferHashSize(pathBytes, preferredHashSize: preferredHashSize));
return DecodedLogRxRoute(
payloadType: payloadType,
pathDescriptor: pathDescriptor,
pathBytes: pathBytes,
hashSize: hashSize,
);
}
static int? descriptorHashSize(int pathDescriptor) {
final normalized = pathDescriptor & 0xFF;
final mode = normalized >> 6;
if (mode == 3) return null;
return mode + 1;
}
static int? descriptorHopCount(int pathDescriptor) {
final hashSize = descriptorHashSize(pathDescriptor);
if (hashSize == null) return null;
return (pathDescriptor & 0xFF) & 0x3F;
}
static int? descriptorByteLength(int pathDescriptor) {
final hashSize = descriptorHashSize(pathDescriptor);
final hopCount = descriptorHopCount(pathDescriptor);
if (hashSize == null || hopCount == null) return null;
final byteLen = hopCount * hashSize;
return byteLen <= 64 ? byteLen : null;
}
static int inferHashSize(List<int> pathBytes, {int? preferredHashSize}) {
if (pathBytes.isEmpty) return 1;