docs: fill in more documentation

account_balance_query_test.go

@@ -1,10 +1,11 @@
 package hedera
 
 import (
-	"github.com/stretchr/testify/assert"
 	"os"
 	"strings"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestNewAccountBalanceQuery(t *testing.T) {

consensus_message_submit_transaction.go

@@ -9,6 +9,7 @@ import (
 
 const chunkSize = 4096
 
+// A ConsensusMessageSubmitTransaction is used for submitting a message to HCS.
 type ConsensusMessageSubmitTransaction struct {
 	TransactionBuilder
 	pb                   *proto.ConsensusSubmitMessageTransactionBody

consensus_topic_create_transaction.go

@@ -6,6 +6,7 @@ import (
 	"github.com/hashgraph/hedera-sdk-go/proto"
 )
 
+// A ConsensusTopicCreateTransaction is for creating a new Topic on HCS.
 type ConsensusTopicCreateTransaction struct {
 	TransactionBuilder
 	pb *proto.ConsensusCreateTopicTransactionBody

consensus_topic_delete_transaction.go

@@ -6,6 +6,7 @@ import (
 	"github.com/hashgraph/hedera-sdk-go/proto"
 )
 
+// A ConsensusTopicDeleteTransaction is for deleting a topic on HCS.
 type ConsensusTopicDeleteTransaction struct {
 	TransactionBuilder
 	pb *proto.ConsensusDeleteTopicTransactionBody

crypto_transfer_transaction.go

@@ -6,7 +6,8 @@ import (
 	"github.com/hashgraph/hedera-sdk-go/proto"
 )
 
-// Transfer hbar from some account balances to other account balances. The accounts list can contain up to 10 accounts.
+// A CryptoTransferTransaction is for transferring hbar from some account balances to other account balances.
+// The accounts list can contain up to 10 accounts.
 // The amounts list must be the same length as the accounts list.
 //
 // This transaction must be signed by the

file_id.go

@@ -2,30 +2,34 @@ package hedera
 
 import (
 	"fmt"
+
 	"github.com/hashgraph/hedera-sdk-go/proto"
 )
 
+// A FileID is the ID for a file on the network.
 type FileID struct {
 	Shard uint64
 	Realm uint64
 	File  uint64
 }
 
-// The public node address book for the current network
+// FileIDForAddressBook returns the public node address book for the current network.
 func FileIDForAddressBook() FileID {
 	return FileID{File: 102}
 }
 
-// The current fee schedule for the network
+// FileIDForFeeSchedule returns the current fee schedule for the network.
 func FileIDForFeeSchedule() FileID {
 	return FileID{File: 111}
 }
 
-// The current exchange rates of HBAR to USD
+// FileIDForExchangeRate returns the current exchange rates of HBAR to USD.
 func FileIDForExchangeRate() FileID {
 	return FileID{File: 112}
 }
 
+// FileIDFromString returns a FileID parsed from the given string.
+// A malformatted string will cause this to return an error instead.
 func FileIDFromString(s string) (FileID, error) {
 	shard, realm, num, err := idFromString(s)
 	if err != nil {