const vcdiff = ;let target = vcdiff;console;
Buffer object of the target.
delta is the binary encoding of the information needed to transform the source to the target. It is encoded as vcdiff, as specified in RFC 3284
source is the group of bytes to transform into the target. In delta encoding, this probably an old, cached version.
Same as above except returns a
Promise that either resolves with the target
Buffer or rejects with an error.