encode uint instead of convert to string

x/pairing/types/epoch_cu.go

@@ -1,6 +1,7 @@
 package types
 
 import (
+	"encoding/binary"
 	"fmt"
 	"strconv"
 	"strings"
@@ -13,27 +14,34 @@ const (
 	ProviderConsumerEpochCuPrefix   = "ProviderConsumerEpochCu/"
 )
 
+func EncodeBlock(block uint64) []byte {
+	encodedKey := make([]byte, 8)
+	binary.BigEndian.PutUint64(encodedKey[0:8], block)
+	return encodedKey
+}
+
+func DecodeBlock(encodedKey []byte) uint64 {
+	return binary.BigEndian.Uint64(encodedKey[0:8])
+}
+
 func UniqueEpochSessionKey(epoch uint64, provider string, chainID string, project string, sessionID uint64) []byte {
-	return []byte(strings.Join([]string{strconv.FormatUint(epoch, 10), provider, chainID, project, strconv.FormatUint(sessionID, 10)}, " "))
+	return []byte(strings.Join([]string{string(EncodeBlock(epoch)), provider, chainID, project, strconv.FormatUint(sessionID, 10)}, " "))
 }
 
 func ProviderEpochCuKey(epoch uint64, provider string, chainID string) []byte {
-	return []byte(strings.Join([]string{strconv.FormatUint(epoch, 10), provider, chainID}, " "))
+	return []byte(strings.Join([]string{string(EncodeBlock(epoch)), provider, chainID}, " "))
 }
 
 func ProviderConsumerEpochCuKey(epoch uint64, provider string, project string, chainID string) []byte {
-	return []byte(strings.Join([]string{strconv.FormatUint(epoch, 10), provider, project, chainID}, " "))
+	return []byte(strings.Join([]string{string(EncodeBlock(epoch)), provider, project, chainID}, " "))
 }
 
 func DecodeUniqueEpochSessionKey(key string) (epoch uint64, provider string, chainID string, project string, sessionID uint64, err error) {
 	split := strings.Split(key, " ")
 	if len(split) != 5 {
 		return 0, "", "", "", 0, fmt.Errorf("invalid UniqueEpochSession key: bad structure. key: %s", key)
 	}
-	epoch, err = strconv.ParseUint(split[0], 10, 64)
-	if err != nil {
-		return 0, "", "", "", 0, fmt.Errorf("invalid UniqueEpochSession key: bad epoch. key: %s", key)
-	}
+	epoch = DecodeBlock([]byte(split[0]))
 	sessionID, err = strconv.ParseUint(split[4], 10, 64)
 	if err != nil {
 		return 0, "", "", "", 0, fmt.Errorf("invalid UniqueEpochSession key: bad session ID. key: %s", key)
@@ -46,10 +54,7 @@ func DecodeProviderEpochCuKey(key string) (epoch uint64, provider string, chainI
 	if len(split) != 3 {
 		return 0, "", "", fmt.Errorf("invalid ProviderEpochCu key: bad structure. key: %s", key)
 	}
-	epoch, err = strconv.ParseUint(split[0], 10, 64)
-	if err != nil {
-		return 0, "", "", fmt.Errorf("invalid ProviderEpochCu key: bad epoch. key: %s", key)
-	}
+	epoch = DecodeBlock([]byte(split[0]))
 	return epoch, split[1], split[2], nil
 }
 
@@ -58,10 +63,7 @@ func DecodeProviderConsumerEpochCuKey(key string) (epoch uint64, provider string
 	if len(split) != 4 {
 		return 0, "", "", "", fmt.Errorf("invalid ProviderConsumerEpochCu key: bad structure. key: %s", key)
 	}
-	epoch, err = strconv.ParseUint(split[0], 10, 64)
-	if err != nil {
-		return 0, "", "", "", fmt.Errorf("invalid ProviderConsumerEpochCu key: bad epoch. key: %s", key)
-	}
+	epoch = DecodeBlock([]byte(split[0]))
 	return epoch, split[1], split[2], split[3], nil
 }