[FAB-4374] NodeSDK - block decode return bytes

During the decode of block data signatures and unknown
payloads were being converted to hex strings, although
this would print out nice in logs it was not easily worked
with by applications like chain code event processing.

Change-Id: I56964ebacd59df7d0f43e8c9fa247089315467d7
Signed-off-by: Bret Harrison <beharrison@nc.rr.com>

fabric-client/lib/BlockDecoder.js

@@ -569,7 +569,7 @@ function decodeMetadataValueSignatures(proto_meta_signatures) {
 		var metadata_signature = {};
 		var proto_metadata_signature = _commonProto.MetadataSignature.decode(proto_meta_signatures[i].toBuffer());
 		metadata_signature.signature_header = decodeSignatureHeader(proto_metadata_signature.getSignatureHeader());
-		metadata_signature.signature = proto_metadata_signature.getSignature().toBuffer().toString('hex');
+		metadata_signature.signature = proto_metadata_signature.getSignature().toBuffer();
 		signatures.push(metadata_signature);
 	}
 
@@ -578,7 +578,7 @@ function decodeMetadataValueSignatures(proto_meta_signatures) {
 
 function decodeBlockDataEnvelope(proto_envelope) {
 	var envelope = {};
-	envelope.signature = proto_envelope.getSignature().toBuffer().toString('hex'); //leave as bytes
+	envelope.signature = proto_envelope.getSignature().toBuffer(); //leave as bytes
 
 	envelope.payload = {};
 	var proto_payload = _commonProto.Payload.decode(proto_envelope.getPayload().toBuffer());
@@ -627,7 +627,7 @@ function decodeConfigEnvelope(config_envelope_bytes) {
 		var proto_payload = _commonProto.Payload.decode(proto_last_update.getPayload().toBuffer());
 		config_envelope.last_update.payload.header = decodeHeader(proto_payload.getHeader());
 		config_envelope.last_update.payload.data = decodeConfigUpdateEnvelope(proto_payload.getData().toBuffer());
-		config_envelope.last_update.signature = proto_last_update.getSignature().toBuffer().toString('hex');//leave as bytes
+		config_envelope.last_update.signature = proto_last_update.getSignature().toBuffer();//leave as bytes
 	}
 
 	return config_envelope;
@@ -891,7 +891,7 @@ function decodeMSPPrincipal(proto_msp_principal) {
 		proto_principal = _mspPrProto.OrganizationUnit.decode(proto_msp_principal.getPrincipal());
 		msp_principal.msp_identifier = proto_principal.getMspIdendifier();//string
 		msp_principal.organizational_unit_identifier = proto_principal.getOrganizationalUnitIdentifier(); //string
-		msp_principal.certifiers_identifier = proto_principal.getCertifiersIdentifier().toBuffer().toString('hex'); //bytes
+		msp_principal.certifiers_identifier = proto_principal.getCertifiersIdentifier().toBuffer(); //bytes
 		break;
 	case _mspPrProto.MSPPrincipal.Classification.IDENTITY:
 		msp_principal = decodeIdentity(proto_msp_principal.getPrincipal());
@@ -904,7 +904,7 @@ function decodeMSPPrincipal(proto_msp_principal) {
 function decodeConfigSignature(proto_configSignature) {
 	var config_signature = {};
 	config_signature.signature_header = decodeSignatureHeader(proto_configSignature.getSignatureHeader().toBuffer());
-	config_signature.sigature = proto_configSignature.getSignature().toBuffer().toString('hex');
+	config_signature.sigature = proto_configSignature.getSignature().toBuffer();
 
 	return config_signature;
 };
@@ -914,7 +914,7 @@ function decodeSignatureHeader(signature_header_bytes) {
 	var signature_header = {};
 	var proto_signature_header = _commonProto.SignatureHeader.decode(signature_header_bytes);
 	signature_header.creator = decodeIdentity(proto_signature_header.getCreator().toBuffer());
-	signature_header.nonce = proto_signature_header.getNonce().toBuffer().toString('hex');
+	signature_header.nonce = proto_signature_header.getNonce().toBuffer();
 
 	return signature_header;
 };
@@ -1025,7 +1025,7 @@ function decodeChannelHeader(header_bytes){
 	channel_header.tx_id = proto_channel_header.getTxId();
 	channel_header.epoch = proto_channel_header.getEpoch().toInt();
 	//TODO need to decode this
-	channel_header.extension = proto_channel_header.getExtension().toBuffer().toString('hex');;
+	channel_header.extension = proto_channel_header.getExtension().toBuffer();
 
 	return channel_header;
 };
@@ -1069,7 +1069,7 @@ function decodeChaincodeEndorsedAction(proto_chaincode_endorsed_action) {
 function decodeEndorsement(proto_endorsement) {
 	var endorsement = {};
 	endorsement.endorser = decodeIdentity(proto_endorsement.getEndorser());
-	endorsement.signature = proto_endorsement.getSignature().toBuffer().toString('hex');
+	endorsement.signature = proto_endorsement.getSignature().toBuffer();
 
 	return endorsement;
 };
@@ -1099,7 +1099,7 @@ function decodeChaincodeEvents(event_bytes) {
 	events.chaincode_id = proto_events.getChaincodeId();
 	events.tx_id = proto_events.getTxId();
 	events.event_name = proto_events.getEventName();
-	events.payload = proto_events.getPayload().toBuffer().toString('hex');
+	events.payload = proto_events.getPayload().toBuffer();
 	return events;
 }