diff --git a/lib/parachain/statement.go b/lib/parachain/statement.go
index 09412e2a98..168b8f0f59 100644
--- a/lib/parachain/statement.go
+++ b/lib/parachain/statement.go
@@ -10,13 +10,13 @@ import (
 // Statement is a result of candidate validation. It could be either `Valid` or `Seconded`.
 type Statement scale.VaryingDataType
 
-// NewStatement returns a new Statement VaryingDataType
+// NewStatement returns a new statement varying data type
 func NewStatement() Statement {
 	vdt := scale.MustNewVaryingDataType(Seconded{}, Valid{})
 	return Statement(vdt)
 }
 
-// Set will set a VaryingDataTypeValue using the underlying VaryingDataType
+// Set will set a value using the underlying  varying data type
 func (s *Statement) Set(val scale.VaryingDataTypeValue) (err error) {
 	vdt := scale.VaryingDataType(*s)
 	err = vdt.Set(val)
@@ -28,7 +28,7 @@ func (s *Statement) Set(val scale.VaryingDataTypeValue) (err error) {
 	return nil
 }
 
-// Value returns the value from the underlying VaryingDataType
+// Value returns the value from the underlying varying data type
 func (s *Statement) Value() (scale.VaryingDataTypeValue, error) {
 	vdt := scale.VaryingDataType(*s)
 	return vdt.Value()
@@ -37,16 +37,16 @@ func (s *Statement) Value() (scale.VaryingDataTypeValue, error) {
 // Seconded represents a statement that a validator seconds a candidate.
 type Seconded CommittedCandidateReceipt
 
-// Index returns the VaryingDataType Index
-func (s Seconded) Index() uint {
+// Index returns the index of varying data type
+func (Seconded) Index() uint {
 	return 1
 }
 
 // Valid represents a statement that a validator has deemed a candidate valid.
 type Valid CandidateHash
 
-// Index returns the VaryingDataType Index
-func (v Valid) Index() uint {
+// Index returns the index of varying data type
+func (Valid) Index() uint {
 	return 2
 }
 
diff --git a/lib/parachain/statement_distribution_message.go b/lib/parachain/statement_distribution_message.go
index 8690fcaa61..68eb3707f2 100644
--- a/lib/parachain/statement_distribution_message.go
+++ b/lib/parachain/statement_distribution_message.go
@@ -10,13 +10,13 @@ import (
 // StatementDistributionMessage represents network messages used by the statement distribution subsystem
 type StatementDistributionMessage scale.VaryingDataType
 
-// NewStatementDistributionMessage returns a new StatementDistributionMessage VaryingDataType
+// NewStatementDistributionMessage returns a new statement distribution message varying data type
 func NewStatementDistributionMessage() StatementDistributionMessage {
 	vdt := scale.MustNewVaryingDataType(SignedFullStatement{}, SecondedStatementWithLargePayload{})
 	return StatementDistributionMessage(vdt)
 }
 
-// Set will set a VaryingDataTypeValue using the underlying VaryingDataType
+// Set will set a value using the underlying  varying data type
 func (sdm *StatementDistributionMessage) Set(val scale.VaryingDataTypeValue) (err error) {
 	vdt := scale.VaryingDataType(*sdm)
 	err = vdt.Set(val)
@@ -28,7 +28,7 @@ func (sdm *StatementDistributionMessage) Set(val scale.VaryingDataTypeValue) (er
 	return nil
 }
 
-// Value returns the value from the underlying VaryingDataType
+// Value returns the value from the underlying varying data type
 func (sdm *StatementDistributionMessage) Value() (scale.VaryingDataTypeValue, error) {
 	vdt := scale.VaryingDataType(*sdm)
 	return vdt.Value()
@@ -40,19 +40,20 @@ type SignedFullStatement struct {
 	UncheckedSignedFullStatement UncheckedSignedFullStatement `scale:"2"`
 }
 
-// Index returns the VaryingDataType Index
-func (s SignedFullStatement) Index() uint {
+// Index returns the index of varying data type
+func (SignedFullStatement) Index() uint {
 	return 0
 }
 
-// Seconded statement with large payload (e.g. containing a runtime upgrade).
+// SecondedStatementWithLargePayload represents Seconded statement with large payload
+// (e.g. containing a runtime upgrade).
 //
 // We only gossip the hash in that case, actual payloads can be fetched from sending node
 // via request/response.
 type SecondedStatementWithLargePayload StatementMetadata
 
-// Index returns the VaryingDataType Index
-func (l SecondedStatementWithLargePayload) Index() uint {
+// Index returns the index of varying data type
+func (SecondedStatementWithLargePayload) Index() uint {
 	return 1
 }