type RenameDataHandlerParams struct {
	DiskID    string        `msg:"id"`
	SrcVolume string        `msg:"sv"`
	SrcPath   string        `msg:"sp"`
	DstVolume string        `msg:"dv"`
	DstPath   string        `msg:"dp"`
	FI        FileInfo      `msg:"fi"`
	Opts      RenameOptions `msg:"ro"`
}

// RenameDataInlineHandlerParams are parameters for RenameDataHandler with a buffer for inline data.

// there isn't such an edge one is created.
func (n *Node) AddToEdgeDiv(to *Node, dv, v int64, residual, inline bool) {
	if n.Out[to] != to.In[n] {
		panic(fmt.Errorf("asymmetric edges %v %v", *n, *to))
	}

	if e := n.Out[to]; e != nil {
		e.WeightDiv += dv
		e.Weight += v
		if residual {
			e.Residual = true
		}
		if !inline {
			e.Inline = false
		}
		return

00000140  ee 47 bc 19 72 d3 cc d0  5b fc 6b 25 2f 64 2a 0c  |.G..r...[.k%/d*.|
00000150  7d e9 8a 1f f8 48 d1 74  d5 70 97 e7 b4 e2 c8 ce  |}....H.t.p......|
00000160  dc 74 27 e9 af b1 64 56  19 28 8a 34 93 4e 1c 03  |.t'...dV.(.4.N..|
00000170  67 ae 41 fb 5f d1 e3 20  45 6b bd 49 25 d8 b4 8b  |g.A._.. Ek.I%...|
00000180  d4 96 d6 96 b2 72 72 f0  d0 68 f1 f7 f3 17 76 85  |.....rr..h....v.|

	// they can't be changed blindly.
	k  = 3
	η  = 2
	du = 10
	dv = 4

	// encodingSizeX is the byte size of a ringElement or nttElement encoded
	// by ByteEncode_X (FIPS 203 (DRAFT), Algorithm 4).
	encodingSize12 = n * log2q / 8
	encodingSize10 = n * du / 8
	encodingSize4  = n * dv / 8
	encodingSize1  = n * 1 / 8

	messageSize       = encodingSize1
	decryptionKeySize = k * encodingSize12