Fix golint warning for gossip state package

Fixed code comments to remove golint warnings.

Change-Id: If732f1ce7067e304df47d112edb4761faaa9800e
Signed-off-by: Artem Barger <bartem@il.ibm.com>

gossip/state/metastate.go

@@ -21,20 +21,20 @@ import (
 	"encoding/binary"
 )
 
-// Metadata information to store the information about current
+// NodeMetastate information to store the information about current
 // height of the ledger (last accepted block sequence number).
 type NodeMetastate struct {
 
 	// Actual ledger height
 	LedgerHeight uint64
 }
 
-// Create new meta data with given ledger height148.69
+// NewNodeMetastate creates new meta data with given ledger height148.69
 func NewNodeMetastate(height uint64) *NodeMetastate {
 	return &NodeMetastate{height}
 }
 
-// Decodes meta state into byte array for serialization
+// Bytes decodes meta state into byte array for serialization
 func (n *NodeMetastate) Bytes() ([]byte, error) {
 	buffer := new(bytes.Buffer)
 	// Explicitly specify byte order for write into the buffer
@@ -47,7 +47,7 @@ func (n *NodeMetastate) Bytes() ([]byte, error) {
 	return buffer.Bytes(), nil
 }
 
-// Get ledger height from the state
+// Height returns ledger height from the state
 func (n *NodeMetastate) Height() uint64 {
 	return n.LedgerHeight
 }
@@ -57,7 +57,7 @@ func (n *NodeMetastate) Update(height uint64) {
 	n.LedgerHeight = height
 }
 
-// Encode from byte array into meta data structure
+// FromBytes - encode from byte array into meta data structure
 func FromBytes(buf []byte) (*NodeMetastate, error) {
 	state  := NodeMetastate{}
 	reader := bytes.NewReader(buf)

gossip/state/state.go

@@ -367,6 +367,8 @@ func (s *GossipStateProviderImpl) requestBlocksInRange(start uint64, end uint64)
 	}, peer)
 }
 
+
+// GetBlock return ledger block given its sequence number as a parameter
 func (s *GossipStateProviderImpl) GetBlock(index uint64) *common.Block {
 	// Try to read missing block from the ledger, should return no nil with
 	// content including at least one block
@@ -377,6 +379,7 @@ func (s *GossipStateProviderImpl) GetBlock(index uint64) *common.Block {
 	return nil
 }
 
+// AddPayload add new payload into state
 func (s *GossipStateProviderImpl) AddPayload(payload *proto.Payload) error {
 	return s.payloads.Push(payload)
 }