Remove streaming replication implementation

litestream.go

@@ -1,7 +1,6 @@
 package litestream
 
 import (
-	"context"
 	"database/sql"
 	"encoding/binary"
 	"errors"
@@ -536,76 +535,6 @@ func ParseOffset(s string) (int64, error) {
 	return int64(v), nil
 }
 
-const (
-	StreamRecordTypeSnapshot   = 1
-	StreamRecordTypeWALSegment = 2
-)
-
-const StreamRecordHeaderSize = 0 +
-	4 + 4 + // type, flags
-	8 + 8 + 8 + 8 // generation, index, offset, size
-
-type StreamRecordHeader struct {
-	Type       int
-	Flags      int
-	Generation string
-	Index      int
-	Offset     int64
-	Size       int64
-}
-
-func (hdr *StreamRecordHeader) Pos() Pos {
-	return Pos{
-		Generation: hdr.Generation,
-		Index:      hdr.Index,
-		Offset:     hdr.Offset,
-	}
-}
-
-func (hdr *StreamRecordHeader) MarshalBinary() ([]byte, error) {
-	generation, err := strconv.ParseUint(hdr.Generation, 16, 64)
-	if err != nil {
-		return nil, fmt.Errorf("invalid generation: %q", generation)
-	}
-
-	data := make([]byte, StreamRecordHeaderSize)
-	binary.BigEndian.PutUint32(data[0:4], uint32(hdr.Type))
-	binary.BigEndian.PutUint32(data[4:8], uint32(hdr.Flags))
-	binary.BigEndian.PutUint64(data[8:16], generation)
-	binary.BigEndian.PutUint64(data[16:24], uint64(hdr.Index))
-	binary.BigEndian.PutUint64(data[24:32], uint64(hdr.Offset))
-	binary.BigEndian.PutUint64(data[32:40], uint64(hdr.Size))
-	return data, nil
-}
-
-// UnmarshalBinary from data into hdr.
-func (hdr *StreamRecordHeader) UnmarshalBinary(data []byte) error {
-	if len(data) < StreamRecordHeaderSize {
-		return io.ErrUnexpectedEOF
-	}
-	hdr.Type = int(binary.BigEndian.Uint32(data[0:4]))
-	hdr.Flags = int(binary.BigEndian.Uint32(data[4:8]))
-	hdr.Generation = fmt.Sprintf("%016x", binary.BigEndian.Uint64(data[8:16]))
-	hdr.Index = int(binary.BigEndian.Uint64(data[16:24]))
-	hdr.Offset = int64(binary.BigEndian.Uint64(data[24:32]))
-	hdr.Size = int64(binary.BigEndian.Uint64(data[32:40]))
-	return nil
-}
-
-// StreamClient represents a client for streaming changes to a replica DB.
-type StreamClient interface {
-	// Stream returns a reader which contains and optional snapshot followed
-	// by a series of WAL segments. This stream begins from the given position.
-	Stream(ctx context.Context, pos Pos) (StreamReader, error)
-}
-
-// StreamReader represents a reader that streams snapshot and WAL records.
-type StreamReader interface {
-	io.ReadCloser
-	PageSize() int
-	Next() (*StreamRecordHeader, error)
-}
-
 // removeDBFiles deletes the database and related files (journal, shm, wal).
 func removeDBFiles(filename string) error {
 	if err := os.Remove(filename); err != nil && !os.IsNotExist(err) {