type Begin struct {
	// Client is true if this Begin is from client side.
	Client bool
	// BeginTime is the time when the RPC attempt begins.
	BeginTime time.Time
	// FailFast indicates if this RPC is failfast.
	FailFast bool
	// IsClientStream indicates whether the RPC is a client streaming RPC.
	IsClientStream bool
	// IsServerStream indicates whether the RPC is a server streaming RPC.
	IsServerStream bool
	// IsTransparentRetryAttempt indicates whether this attempt was initiated
	// due to transparently retrying a previous attempt.
	IsTransparentRetryAttempt bool
}

type ConnBegin struct {
	// Client is true if this ConnBegin is from client side.
	Client bool
}

type ConnEnd struct {
	// Client is true if this ConnEnd is from client side.
	Client bool
}

type ConnStats interface {

	// IsClient returns true if this ConnStats is from client side.
	IsClient() bool
	// contains filtered or unexported methods
}

type ConnTagInfo struct {
	// RemoteAddr is the remote address of the corresponding connection.
	RemoteAddr net.Addr
	// LocalAddr is the local address of the corresponding connection.
	LocalAddr net.Addr
}

type End struct {
	// Client is true if this End is from client side.
	Client bool
	// BeginTime is the time when the RPC began.
	BeginTime time.Time
	// EndTime is the time when the RPC ends.
	EndTime time.Time
	// Trailer contains the trailer metadata received from the server. This
	// field is only valid if this End is from the client side.
	// Deprecated: use Trailer in InTrailer instead.
	Trailer metadata.MD
	// Error is the error the RPC ended with. It is an error generated from
	// status.Status and can be converted back to status.Status using
	// status.FromError if non-nil.
	Error error
}

type Handler interface {
	// TagRPC can attach some information to the given context.
	// The context used for the rest lifetime of the RPC will be derived from
	// the returned context.
	TagRPC(context.Context, *RPCTagInfo) context.Context
	// HandleRPC processes the RPC stats.
	HandleRPC(context.Context, RPCStats)

	// TagConn can attach some information to the given context.
	// The returned context will be used for stats handling.
	// For conn stats handling, the context used in HandleConn for this
	// connection will be derived from the context returned.
	// For RPC stats handling,
	//  - On server side, the context used in HandleRPC for all RPCs on this
	// connection will be derived from the context returned.
	//  - On client side, the context is not derived from the context returned.
	TagConn(context.Context, *ConnTagInfo) context.Context
	// HandleConn processes the Conn stats.
	HandleConn(context.Context, ConnStats)
}

type InHeader struct {
	// Client is true if this InHeader is from client side.
	Client bool
	// WireLength is the wire length of header.
	WireLength int
	// Compression is the compression algorithm used for the RPC.
	Compression string
	// Header contains the header metadata received.
	Header metadata.MD

	// The following fields are valid only if Client is false.
	// FullMethod is the full RPC method string, i.e., /package.service/method.
	FullMethod string
	// RemoteAddr is the remote address of the corresponding connection.
	RemoteAddr net.Addr
	// LocalAddr is the local address of the corresponding connection.
	LocalAddr net.Addr
}

type InPayload struct {
	// Client is true if this InPayload is from client side.
	Client bool
	// Payload is the payload with original type.  This may be modified after
	// the call to HandleRPC which provides the InPayload returns and must be
	// copied if needed later.
	Payload any

	// Length is the size of the uncompressed payload data. Does not include any
	// framing (gRPC or HTTP/2).
	Length int
	// CompressedLength is the size of the compressed payload data. Does not
	// include any framing (gRPC or HTTP/2). Same as Length if compression not
	// enabled.
	CompressedLength int
	// WireLength is the size of the compressed payload data plus gRPC framing.
	// Does not include HTTP/2 framing.
	WireLength int

	// RecvTime is the time when the payload is received.
	RecvTime time.Time
}

type InTrailer struct {
	// Client is true if this InTrailer is from client side.
	Client bool
	// WireLength is the wire length of trailer.
	WireLength int
	// Trailer contains the trailer metadata received from the server. This
	// field is only valid if this InTrailer is from the client side.
	Trailer metadata.MD
}

type MetricSet struct {
	// contains filtered or unexported fields
}

type OutHeader struct {
	// Client is true if this OutHeader is from client side.
	Client bool
	// Compression is the compression algorithm used for the RPC.
	Compression string
	// Header contains the header metadata sent.
	Header metadata.MD

	// The following fields are valid only if Client is true.
	// FullMethod is the full RPC method string, i.e., /package.service/method.
	FullMethod string
	// RemoteAddr is the remote address of the corresponding connection.
	RemoteAddr net.Addr
	// LocalAddr is the local address of the corresponding connection.
	LocalAddr net.Addr
}

type OutPayload struct {
	// Client is true if this OutPayload is from client side.
	Client bool
	// Payload is the payload with original type.  This may be modified after
	// the call to HandleRPC which provides the OutPayload returns and must be
	// copied if needed later.
	Payload any
	// Length is the size of the uncompressed payload data. Does not include any
	// framing (gRPC or HTTP/2).
	Length int
	// CompressedLength is the size of the compressed payload data. Does not
	// include any framing (gRPC or HTTP/2). Same as Length if compression not
	// enabled.
	CompressedLength int
	// WireLength is the size of the compressed payload data plus gRPC framing.
	// Does not include HTTP/2 framing.
	WireLength int
	// SentTime is the time when the payload is sent.
	SentTime time.Time
}

type OutTrailer struct {
	// Client is true if this OutTrailer is from client side.
	Client bool
	// WireLength is the wire length of trailer.
	//
	// Deprecated: This field is never set. The length is not known when this message is
	// emitted because the trailer fields are compressed with hpack after that.
	WireLength int
	// Trailer contains the trailer metadata sent to the client. This
	// field is only valid if this OutTrailer is from the server side.
	Trailer metadata.MD
}

type PickerUpdated struct{}

type RPCStats interface {

	// IsClient returns true if this RPCStats is from client side.
	IsClient() bool
	// contains filtered or unexported methods
}

type RPCTagInfo struct {
	// FullMethodName is the RPC method in the format of /package.service/method.
	FullMethodName string
	// FailFast indicates if this RPC is failfast.
	// This field is only valid on client side, it's always false on server side.
	FailFast bool
}