refactor: simplify API key constants using iota

protocol/api_key.go

@@ -2,47 +2,47 @@ package protocol
 
 // Protocol API keys. See: https://kafka.apache.org/protocol#protocol_api_keys
 const (
-	ProduceKey                 = 0
-	FetchKey                   = 1
-	OffsetsKey                 = 2
-	MetadataKey                = 3
-	LeaderAndISRKey            = 4
-	StopReplicaKey             = 5
-	UpdateMetadataKey          = 6
-	ControlledShutdownKey      = 7
-	OffsetCommitKey            = 8
-	OffsetFetchKey             = 9
-	FindCoordinatorKey         = 10
-	JoinGroupKey               = 11
-	HeartbeatKey               = 12
-	LeaveGroupKey              = 13
-	SyncGroupKey               = 14
-	DescribeGroupsKey          = 15
-	ListGroupsKey              = 16
-	SaslHandshakeKey           = 17
-	APIVersionsKey             = 18
-	CreateTopicsKey            = 19
-	DeleteTopicsKey            = 20
-	DeleteRecordsKey           = 21
-	InitProducerIDKey          = 22
-	OffsetForLeaderEpochKey    = 23
-	AddPartitionsToTxnKey      = 24
-	AddOffsetsToTxnKey         = 25
-	EndTxnKey                  = 26
-	WriteTxnMarkersKey         = 27
-	TxnOffsetCommitKey         = 28
-	DescribeAclsKey            = 29
-	CreateAclsKey              = 30
-	DeleteAclsKey              = 31
-	DescribeConfigsKey         = 32
-	AlterConfigsKey            = 33
-	AlterReplicaLogDirsKey     = 34
-	DescribeLogDirsKey         = 35
-	SaslAuthenticateKey        = 36
-	CreatePartitionsKey        = 37
-	CreateDelegationTokenKey   = 38
-	RenewDelegationTokenKey    = 39
-	ExpireDelegationTokenKey   = 40
-	DescribeDelegationTokenKey = 41
-	DeleteGroupsKey            = 42
+	ProduceKey = iota
+	FetchKey
+	OffsetsKey
+	MetadataKey
+	LeaderAndISRKey
+	StopReplicaKey
+	UpdateMetadataKey
+	ControlledShutdownKey
+	OffsetCommitKey
+	OffsetFetchKey
+	FindCoordinatorKey
+	JoinGroupKey
+	HeartbeatKey
+	LeaveGroupKey
+	SyncGroupKey
+	DescribeGroupsKey
+	ListGroupsKey
+	SaslHandshakeKey
+	APIVersionsKey
+	CreateTopicsKey
+	DeleteTopicsKey
+	DeleteRecordsKey
+	InitProducerIDKey
+	OffsetForLeaderEpochKey
+	AddPartitionsToTxnKey
+	AddOffsetsToTxnKey
+	EndTxnKey
+	WriteTxnMarkersKey
+	TxnOffsetCommitKey
+	DescribeAclsKey
+	CreateAclsKey
+	DeleteAclsKey
+	DescribeConfigsKey
+	AlterConfigsKey
+	AlterReplicaLogDirsKey
+	DescribeLogDirsKey
+	SaslAuthenticateKey
+	CreatePartitionsKey
+	CreateDelegationTokenKey
+	RenewDelegationTokenKey
+	ExpireDelegationTokenKey
+	DescribeDelegationTokenKey
+	DeleteGroupsKey
 )