neoneo-go/pkg/network/compress.go

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package network
import (
"github.com/nspcc-dev/neo-go/pkg/network/payload"
"github.com/pierrec/lz4"
)
// compress compresses bytes using lz4.
func compress(source []byte) ([]byte, error) {
dest := make([]byte, lz4.CompressBlockBound(len(source)))
size, err := lz4.CompressBlock(source, dest, nil)
if err != nil {
return nil, err
}
return dest[:size], nil
}
// decompress decompresses bytes using lz4.
func decompress(source []byte) ([]byte, error) {
maxSize := len(source) * 255
if maxSize > payload.MaxSize {
maxSize = payload.MaxSize
}
dest := make([]byte, maxSize)
size, err := lz4.UncompressBlock(source, dest)
if err != nil {
return nil, err
}
return dest[:size], nil
}