--- a/src/lib/TransactionalBuffer.h	Sun Jun 20 20:16:46 2021 +0200
+++ b/src/lib/TransactionalBuffer.h	Sun Jun 20 21:06:02 2021 +0200
@@ -37,6 +37,9 @@
 	size_t readPosition = 0;
 	size_t readPositionCommited = 0;
 
+	size_t bytesRead = 0;
+	size_t bytesReadCommited = 0;
+
 	size_t availableForReading() {
 		if (readPosition < writePosition) return writePosition - readPosition;
 		else if (readPosition > writePosition) return bufferSize - readPosition + writePosition;
@@ -99,6 +102,7 @@
 		peek(outputBuffer, length);
 		readPosition = (readPosition + length) % bufferSize;
 		hasData = readPosition != writePosition;
+		bytesRead += length;
 	}
 
 	void peek(uint8_t* outputBuffer, const size_t length) {
@@ -114,11 +118,18 @@
 
 	void commitRead() {
 		readPositionCommited = readPosition;
+		bytesReadCommited = bytesRead;
 	}
 
 	void rollbackRead() {
 		readPosition = readPositionCommited;
+		bytesRead = bytesReadCommited;
 	}
+
+	size_t getBytesRead() {
+		return bytesRead;
+	}
+
 };