Protected manifest (#69)
* add protected manifes type * encode protected manifest * add empty block type handling * add tests for protected manifest
This commit is contained in:
parent
8146198869
commit
3222f436cc
|
@ -7,6 +7,9 @@
|
|||
## This file may not be copied, modified, or distributed except according to
|
||||
## those terms.
|
||||
|
||||
import std/tables
|
||||
export tables
|
||||
|
||||
import pkg/upraises
|
||||
|
||||
push: {.upraises: [].}
|
||||
|
@ -18,14 +21,100 @@ import pkg/questionable/results
|
|||
|
||||
import ./errors
|
||||
|
||||
template EmptyCid*: untyped =
|
||||
var
|
||||
emptyCid {.global, threadvar.}:
|
||||
array[CIDv0..CIDv1, Table[MultiCodec, Cid]]
|
||||
|
||||
once:
|
||||
emptyCid = [
|
||||
CIDv0: {
|
||||
multiCodec("sha2-256"): Cid
|
||||
.init("QmdfTbBqBPQ7VNxZEYEj14VmRuZBkqFbiwReogJgS1zR1n")
|
||||
.get()
|
||||
}.toTable,
|
||||
CIDv1: {
|
||||
multiCodec("sha2-256"): Cid
|
||||
.init("bafybeihdwdcefgh4dqkjv67uzcmw7ojee6xedzdetojuzjevtenxquvyku")
|
||||
.get()
|
||||
}.toTable,
|
||||
]
|
||||
|
||||
emptyCid
|
||||
|
||||
template EmptyDigests*: untyped =
|
||||
var
|
||||
emptyDigests {.global, threadvar.}:
|
||||
array[CIDv0..CIDv1, Table[MultiCodec, MultiHash]]
|
||||
|
||||
once:
|
||||
emptyDigests = [
|
||||
CIDv0: {
|
||||
multiCodec("sha2-256"): EmptyCid[CIDv0]
|
||||
.catch
|
||||
.get()[multiCodec("sha2-256")]
|
||||
.catch
|
||||
.get()
|
||||
.mhash
|
||||
.get()
|
||||
}.toTable,
|
||||
CIDv1: {
|
||||
multiCodec("sha2-256"): EmptyCid[CIDv0]
|
||||
.catch
|
||||
.get()[multiCodec("sha2-256")]
|
||||
.catch
|
||||
.get()
|
||||
.mhash
|
||||
.get()
|
||||
}.toTable,
|
||||
]
|
||||
|
||||
emptyDigests
|
||||
|
||||
template EmptyBlock*: untyped =
|
||||
var
|
||||
emptyBlock {.global, threadvar.}:
|
||||
array[CIDv0..CIDv1, Table[MultiCodec, Block]]
|
||||
|
||||
once:
|
||||
emptyBlock = [
|
||||
CIDv0: {
|
||||
multiCodec("sha2-256"): Block(
|
||||
cid: EmptyCid[CIDv1][multiCodec("sha2-256")])
|
||||
}.toTable,
|
||||
CIDv1: {
|
||||
multiCodec("sha2-256"): Block(
|
||||
cid: EmptyCid[CIDv1][multiCodec("sha2-256")])
|
||||
}.toTable,
|
||||
]
|
||||
|
||||
emptyBlock
|
||||
|
||||
const
|
||||
BlockSize* = 31 * 64 * 4 # file chunk read size
|
||||
BlockSize* = 31 * 64 * 4 # block size
|
||||
|
||||
type
|
||||
Block* = ref object of RootObj
|
||||
cid*: Cid
|
||||
data*: seq[byte]
|
||||
|
||||
proc isEmpty*(cid: Cid): bool =
|
||||
cid == EmptyCid[cid.cidver]
|
||||
.catch
|
||||
.get()[cid.mhash.get().mcodec]
|
||||
.catch
|
||||
.get()
|
||||
|
||||
proc isEmpty*(blk: Block): bool =
|
||||
blk.cid.isEmpty
|
||||
|
||||
proc emptyBlock*(cid: Cid): Block =
|
||||
EmptyBlock[cid.cidver]
|
||||
.catch
|
||||
.get()[cid.mhash.get().mcodec]
|
||||
.catch
|
||||
.get()
|
||||
|
||||
proc `$`*(b: Block): string =
|
||||
result &= "cid: " & $b.cid
|
||||
result &= "\ndata: " & string.fromBytes(b.data)
|
||||
|
@ -62,6 +151,6 @@ func new*(
|
|||
mcodec = mhash.mcodec)
|
||||
|
||||
if verify and cid != b.cid:
|
||||
return "Cid's don't match!".failure
|
||||
return "Cid and content don't match!".failure
|
||||
|
||||
success b
|
||||
|
|
|
@ -52,10 +52,17 @@ func encode*(_: DagPBCoder, manifest: Manifest): ?!seq[byte] =
|
|||
# contains the following protobuf `Message`
|
||||
#
|
||||
# ```protobuf
|
||||
# Message ErasureInfo {
|
||||
# optional uint32 K = 1; # number of encoded blocks
|
||||
# optional uint32 M = 2; # number of parity blocks
|
||||
# optional bytes cid = 3; # cid of the original dataset
|
||||
# optional uint32 original = 4; # number of original blocks
|
||||
# }
|
||||
# Message Header {
|
||||
# optional bytes rootHash = 1; # the root (tree) hash
|
||||
# optional uint32 blockSize = 2; # size of a single block
|
||||
# optional uint32 blocksLen = 3; # total amount of blocks
|
||||
# optional bytes rootHash = 1; # the root (tree) hash
|
||||
# optional uint32 blockSize = 2; # size of a single block
|
||||
# optional uint32 blocksLen = 3; # total amount of blocks
|
||||
# optional ErasureInfo erasure = 4; # erasure coding info
|
||||
# }
|
||||
# ```
|
||||
#
|
||||
|
@ -65,8 +72,17 @@ func encode*(_: DagPBCoder, manifest: Manifest): ?!seq[byte] =
|
|||
header.write(1, cid.data.buffer)
|
||||
header.write(2, manifest.blockSize.uint32)
|
||||
header.write(3, manifest.len.uint32)
|
||||
if manifest.protected:
|
||||
var erasureInfo = initProtoBuffer()
|
||||
erasureInfo.write(1, manifest.K.uint32)
|
||||
erasureInfo.write(2, manifest.M.uint32)
|
||||
erasureInfo.write(3, manifest.originalCid.data.buffer)
|
||||
erasureInfo.write(4, manifest.originalLen.uint32)
|
||||
erasureInfo.finish()
|
||||
|
||||
pbNode.write(1, header.buffer) # set the rootHash Cid as the data field
|
||||
header.write(4, erasureInfo)
|
||||
|
||||
pbNode.write(1, header) # set the rootHash Cid as the data field
|
||||
pbNode.finish()
|
||||
|
||||
return pbNode.buffer.success
|
||||
|
@ -78,9 +94,13 @@ func decode*(_: DagPBCoder, data: openArray[byte]): ?!Manifest =
|
|||
var
|
||||
pbNode = initProtoBuffer(data)
|
||||
pbHeader: ProtoBuffer
|
||||
pbErasureInfo: ProtoBuffer
|
||||
rootHash: seq[byte]
|
||||
originalCid: seq[byte]
|
||||
blockSize: uint32
|
||||
blocksLen: uint32
|
||||
originalLen: uint32
|
||||
K, M: uint32
|
||||
blocks: seq[Cid]
|
||||
|
||||
# Decode `Header` message
|
||||
|
@ -97,6 +117,22 @@ func decode*(_: DagPBCoder, data: openArray[byte]): ?!Manifest =
|
|||
if pbHeader.getField(3, blocksLen).isErr:
|
||||
return failure("Unable to decode `blocksLen` from manifest!")
|
||||
|
||||
if pbHeader.getField(4, pbErasureInfo).isErr:
|
||||
return failure("Unable to decode `erasureInfo` from manifest!")
|
||||
|
||||
if pbErasureInfo.buffer.len > 0:
|
||||
if pbErasureInfo.getField(1, K).isErr:
|
||||
return failure("Unable to decode `K` from manifest!")
|
||||
|
||||
if pbErasureInfo.getField(2, M).isErr:
|
||||
return failure("Unable to decode `M` from manifest!")
|
||||
|
||||
if pbErasureInfo.getField(3, originalCid).isErr:
|
||||
return failure("Unable to decode `originalCid` from manifest!")
|
||||
|
||||
if pbErasureInfo.getField(4, originalLen).isErr:
|
||||
return failure("Unable to decode `originalLen` from manifest!")
|
||||
|
||||
let rootHashCid = ? Cid.init(rootHash).mapFailure
|
||||
var linksBuf: seq[seq[byte]]
|
||||
if pbNode.getRepeatedField(2, linksBuf).isOk:
|
||||
|
@ -112,15 +148,27 @@ func decode*(_: DagPBCoder, data: openArray[byte]): ?!Manifest =
|
|||
if blocksLen.int != blocks.len:
|
||||
return failure("Total blocks and length of blocks in header don't match!")
|
||||
|
||||
Manifest(
|
||||
rootHash: rootHashCid.some,
|
||||
blockSize: blockSize.int,
|
||||
blocks: blocks,
|
||||
hcodec: (? rootHashCid.mhash.mapFailure).mcodec,
|
||||
codec: rootHashCid.mcodec,
|
||||
version: rootHashCid.cidver).success
|
||||
var
|
||||
self = Manifest(
|
||||
rootHash: rootHashCid.some,
|
||||
blockSize: blockSize.int,
|
||||
blocks: blocks,
|
||||
hcodec: (? rootHashCid.mhash.mapFailure).mcodec,
|
||||
codec: rootHashCid.mcodec,
|
||||
version: rootHashCid.cidver,
|
||||
protected: pbErasureInfo.buffer.len > 0)
|
||||
|
||||
proc encode*(self: var Manifest, encoder = ManifestContainers[$DagPBCodec]): ?!seq[byte] =
|
||||
if self.protected:
|
||||
self.K = K.int
|
||||
self.M = M.int
|
||||
self.originalCid = ? Cid.init(originalCid).mapFailure
|
||||
self.originalLen = originalLen.int
|
||||
|
||||
self.success
|
||||
|
||||
proc encode*(
|
||||
self: Manifest,
|
||||
encoder = ManifestContainers[$DagPBCodec]): ?!seq[byte] =
|
||||
## Encode a manifest using `encoder`
|
||||
##
|
||||
|
||||
|
|
|
@ -11,7 +11,6 @@ import pkg/upraises
|
|||
|
||||
push: {.upraises: [].}
|
||||
|
||||
import std/tables
|
||||
import pkg/libp2p/protobuf/minprotobuf
|
||||
import pkg/libp2p
|
||||
import pkg/questionable
|
||||
|
@ -21,39 +20,22 @@ import pkg/chronicles
|
|||
import ../errors
|
||||
import ../blocktype
|
||||
|
||||
template EmptyDigests: untyped =
|
||||
var
|
||||
emptyDigests {.global, threadvar.}:
|
||||
array[CIDv0..CIDv1, Table[MultiCodec, MultiHash]]
|
||||
|
||||
once:
|
||||
emptyDigests = [
|
||||
CIDv0: {
|
||||
multiCodec("sha2-256"): Cid
|
||||
.init("bafybeihdwdcefgh4dqkjv67uzcmw7ojee6xedzdetojuzjevtenxquvyku")
|
||||
.get()
|
||||
.mhash
|
||||
.get()
|
||||
}.toTable,
|
||||
CIDv1: {
|
||||
multiCodec("sha2-256"): Cid
|
||||
.init("QmdfTbBqBPQ7VNxZEYEj14VmRuZBkqFbiwReogJgS1zR1n")
|
||||
.get()
|
||||
.mhash
|
||||
.get()
|
||||
}.toTable,
|
||||
]
|
||||
|
||||
emptyDigests
|
||||
|
||||
type
|
||||
Manifest* = ref object of RootObj
|
||||
rootHash*: ?Cid # root (tree) hash of the contained data set
|
||||
blockSize*: int # size of each contained block (might not be needed if blocks are len-prefixed)
|
||||
blocks*: seq[Cid] # block Cid
|
||||
version*: CidVersion # Cid version
|
||||
hcodec*: MultiCodec # Multihash codec
|
||||
codec*: MultiCodec # Data set codec
|
||||
rootHash*: ?Cid # root (tree) hash of the contained data set
|
||||
blockSize*: int # size of each contained block (might not be needed if blocks are len-prefixed)
|
||||
blocks*: seq[Cid] # block Cid
|
||||
version*: CidVersion # Cid version
|
||||
hcodec*: MultiCodec # Multihash codec
|
||||
codec*: MultiCodec # Data set codec
|
||||
case protected*: bool # Protected datasets have erasure coded info
|
||||
of true:
|
||||
K*: int # Number of blocks to encode
|
||||
M*: int # Number of resulting parity blocks
|
||||
originalCid*: Cid # The original Cid of the dataset being erasure coded
|
||||
originalLen*: int # The length of the original manifest
|
||||
else:
|
||||
discard
|
||||
|
||||
func len*(self: Manifest): int =
|
||||
self.blocks.len
|
||||
|
@ -84,6 +66,10 @@ iterator items*(self: Manifest): Cid =
|
|||
for b in self.blocks:
|
||||
yield b
|
||||
|
||||
iterator pairs*(self: Manifest): tuple[key: int, val: Cid] =
|
||||
for pair in self.blocks.pairs():
|
||||
yield pair
|
||||
|
||||
func contains*(self: Manifest, cid: Cid): bool =
|
||||
cid in self.blocks
|
||||
|
||||
|
@ -122,7 +108,16 @@ proc makeRoot*(self: Manifest): ?!void =
|
|||
|
||||
self.rootHash = cid.some
|
||||
|
||||
ok()
|
||||
success()
|
||||
|
||||
func rounded*(self: Manifest): int =
|
||||
if (self.originalLen mod self.K) != 0:
|
||||
return self.originalLen + (self.K - (self.originalLen mod self.K))
|
||||
|
||||
self.originalLen
|
||||
|
||||
func steps*(self: Manifest): int =
|
||||
self.rounded div self.K # number of blocks per row
|
||||
|
||||
proc cid*(self: Manifest): ?!Cid =
|
||||
## Generate a root hash using the treehash algorithm
|
||||
|
@ -136,6 +131,7 @@ proc cid*(self: Manifest): ?!Cid =
|
|||
proc new*(
|
||||
T: type Manifest,
|
||||
blocks: openArray[Cid] = [],
|
||||
protected = false,
|
||||
version = CIDv1,
|
||||
hcodec = multiCodec("sha2-256"),
|
||||
codec = multiCodec("raw"),
|
||||
|
@ -151,8 +147,45 @@ proc new*(
|
|||
version: version,
|
||||
codec: codec,
|
||||
hcodec: hcodec,
|
||||
blockSize: blockSize
|
||||
).success
|
||||
blockSize: blockSize,
|
||||
protected: protected).success
|
||||
|
||||
proc new*(
|
||||
T: type Manifest,
|
||||
manifest: Manifest,
|
||||
K, M: int): ?!Manifest =
|
||||
## Create an erasure protected dataset from an
|
||||
## un-protected one
|
||||
##
|
||||
|
||||
var
|
||||
self = Manifest(
|
||||
version: manifest.version,
|
||||
codec: manifest.codec,
|
||||
hcodec: manifest.hcodec,
|
||||
blockSize: manifest.blockSize,
|
||||
protected: true,
|
||||
K: K, M: M,
|
||||
originalCid: ? manifest.cid,
|
||||
originalLen: manifest.len)
|
||||
|
||||
let
|
||||
encodedLen = self.rounded + (self.steps * M)
|
||||
|
||||
self.blocks = newSeq[Cid](encodedLen)
|
||||
|
||||
# copy original manifest blocks
|
||||
for i in 0..<self.rounded:
|
||||
if i < manifest.len:
|
||||
self.blocks[i] = manifest[i]
|
||||
else:
|
||||
self.blocks[i] = EmptyCid[manifest.version]
|
||||
.catch
|
||||
.get()[manifest.hcodec]
|
||||
.catch
|
||||
.get()
|
||||
|
||||
self.success
|
||||
|
||||
proc new*(
|
||||
T: type Manifest,
|
||||
|
|
|
@ -27,17 +27,18 @@ suite "Manifest":
|
|||
]).tryGet()
|
||||
|
||||
let
|
||||
checksum = @[18.byte, 32, 227, 176, 196, 66, 152,
|
||||
encoded = @[byte 18, 32, 227, 176, 196, 66, 152,
|
||||
252, 28, 20, 154, 251, 244, 200, 153,
|
||||
111, 185, 36, 39, 174, 65, 228, 100,
|
||||
155, 147, 76, 164, 149, 153, 27, 120,
|
||||
82, 184, 85]
|
||||
|
||||
var mh: MultiHash
|
||||
check MultiHash.decode(checksum, mh).tryGet() > 0
|
||||
check MultiHash.decode(encoded, mh).tryGet() > 0
|
||||
|
||||
let checkSumCid = Cid.init(manifest.version, manifest.codec, mh).tryGet()
|
||||
check checkSumCid == manifest.cid.tryGet()
|
||||
let encodedCid = Cid.init(manifest.version, manifest.codec, mh).tryGet()
|
||||
check:
|
||||
encodedCid == manifest.cid.tryGet()
|
||||
|
||||
test "Should encode/decode to/from manifest":
|
||||
let
|
||||
|
@ -46,10 +47,51 @@ suite "Manifest":
|
|||
)
|
||||
|
||||
var
|
||||
blocksManifest = Manifest.new(blocks).tryGet()
|
||||
manifest = Manifest.new(blocks).tryGet()
|
||||
|
||||
let
|
||||
e = blocksManifest.encode().tryGet()
|
||||
manifest = Manifest.decode(e).tryGet()
|
||||
e = manifest.encode().tryGet()
|
||||
decoded = Manifest.decode(e).tryGet()
|
||||
|
||||
check manifest.blocks == blocks
|
||||
check:
|
||||
decoded.blocks == blocks
|
||||
decoded.protected == false
|
||||
|
||||
test "Should produce a protected manifest":
|
||||
let
|
||||
blocks = (0..<333).mapIt(
|
||||
Block.new(("Block " & $it).toBytes).tryGet().cid
|
||||
)
|
||||
manifest = Manifest.new(blocks).tryGet()
|
||||
protected = Manifest.new(manifest, 2, 2).tryGet()
|
||||
|
||||
check:
|
||||
protected.originalCid == manifest.cid.tryGet()
|
||||
protected.blocks[0..<333] == manifest.blocks
|
||||
protected.protected == true
|
||||
protected.originalLen == manifest.len
|
||||
|
||||
# fill up with empty Cid's
|
||||
for i in protected.rounded..<protected.len:
|
||||
protected.blocks[i] = EmptyCid[manifest.version]
|
||||
.catch
|
||||
.get()[manifest.hcodec]
|
||||
.catch
|
||||
.get()
|
||||
|
||||
var
|
||||
encoded = protected.encode().tryGet()
|
||||
decoded = Manifest.decode(encoded).tryGet()
|
||||
|
||||
check:
|
||||
decoded.protected == true
|
||||
decoded.originalLen == manifest.len
|
||||
|
||||
decoded.K == protected.K
|
||||
decoded.M == protected.M
|
||||
|
||||
decoded.originalCid == protected.originalCid
|
||||
decoded.originalCid == manifest.cid.tryGet()
|
||||
|
||||
decoded.blocks == protected.blocks
|
||||
decoded.blocks[0..<333] == manifest.blocks
|
||||
|
|
Loading…
Reference in New Issue