Revert deprecation and go-libipfs/blocks stub types

This reverts commits:
- e61d558
- c3d0e42
- a6dbd28

Author: Jorropo

README.md

@@ -1,5 +1,3 @@
-# ⚠️ This repository has been moved to https://github.com/ipfs/go-libipfs/tree/main/blocks.
-
 go-block-format
 ==================
 

blocks.go

@@ -1,26 +1,82 @@
-// Deprecated: Use github.com/ipfs/go-libipfs/blocks instead.
+// Package blocks contains the lowest level of IPLD data structures.
+// A block is raw data accompanied by a CID. The CID contains the multihash
+// corresponding to the block.
 package blocks
 
 import (
-	"github.com/ipfs/go-cid"
-	"github.com/ipfs/go-libipfs/blocks"
+	"errors"
+	"fmt"
+
+	cid "github.com/ipfs/go-cid"
+	u "github.com/ipfs/go-ipfs-util"
+	mh "github.com/multiformats/go-multihash"
 )
 
-// Deprecated: Use blocks.ErrWrongHash instead.
-var ErrWrongHash = blocks.ErrWrongHash
+// ErrWrongHash is returned when the Cid of a block is not the expected
+// according to the contents. It is currently used only when debugging.
+var ErrWrongHash = errors.New("data did not match given hash")
+
+// Block provides abstraction for blocks implementations.
+type Block interface {
+	RawData() []byte
+	Cid() cid.Cid
+	String() string
+	Loggable() map[string]interface{}
+}
+
+// A BasicBlock is a singular block of data in ipfs. It implements the Block
+// interface.
+type BasicBlock struct {
+	cid  cid.Cid
+	data []byte
+}
+
+// NewBlock creates a Block object from opaque data. It will hash the data.
+func NewBlock(data []byte) *BasicBlock {
+	// TODO: fix assumptions
+	return &BasicBlock{data: data, cid: cid.NewCidV0(u.Hash(data))}
+}
+
+// NewBlockWithCid creates a new block when the hash of the data
+// is already known, this is used to save time in situations where
+// we are able to be confident that the data is correct.
+func NewBlockWithCid(data []byte, c cid.Cid) (*BasicBlock, error) {
+	if u.Debug {
+		chkc, err := c.Prefix().Sum(data)
+		if err != nil {
+			return nil, err
+		}
+
+		if !chkc.Equals(c) {
+			return nil, ErrWrongHash
+		}
+	}
+	return &BasicBlock{data: data, cid: c}, nil
+}
 
-// Deprecated: Use blocks.Block instead.
-type Block = blocks.Block
+// Multihash returns the hash contained in the block CID.
+func (b *BasicBlock) Multihash() mh.Multihash {
+	return b.cid.Hash()
+}
 
-// Deprecated: Use blocks.BasicBlock instead.
-type BasicBlock = blocks.BasicBlock
+// RawData returns the block raw contents as a byte slice.
+func (b *BasicBlock) RawData() []byte {
+	return b.data
+}
+
+// Cid returns the content identifier of the block.
+func (b *BasicBlock) Cid() cid.Cid {
+	return b.cid
+}
 
-// Deprecated: Use blocks.NewBlock instead.
-func NewBlock(data []byte) *blocks.BasicBlock {
-	return blocks.NewBlock(data)
+// String provides a human-readable representation of the block CID.
+func (b *BasicBlock) String() string {
+	return fmt.Sprintf("[Block %s]", b.Cid())
 }
 
-// Deprecated: Use blocks.NewBlockWithCid instead.
-func NewBlockWithCid(data []byte, c cid.Cid) (*blocks.BasicBlock, error) {
-	return blocks.NewBlockWithCid(data, c)
+// Loggable returns a go-log loggable item.
+func (b *BasicBlock) Loggable() map[string]interface{} {
+	return map[string]interface{}{
+		"block": b.Cid().String(),
+	}
 }

blocks_test.go

@@ -0,0 +1,98 @@
+package blocks
+
+import (
+	"bytes"
+	"testing"
+
+	cid "github.com/ipfs/go-cid"
+	u "github.com/ipfs/go-ipfs-util"
+	mh "github.com/multiformats/go-multihash"
+)
+
+func TestBlocksBasic(t *testing.T) {
+
+	// Test empty data
+	empty := []byte{}
+	NewBlock(empty)
+
+	// Test nil case
+	NewBlock(nil)
+
+	// Test some data
+	NewBlock([]byte("Hello world!"))
+}
+
+func TestData(t *testing.T) {
+	data := []byte("some data")
+	block := NewBlock(data)
+
+	if !bytes.Equal(block.RawData(), data) {
+		t.Error("data is wrong")
+	}
+}
+
+func TestHash(t *testing.T) {
+	data := []byte("some other data")
+	block := NewBlock(data)
+
+	hash, err := mh.Sum(data, mh.SHA2_256, -1)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(block.Multihash(), hash) {
+		t.Error("wrong multihash")
+	}
+}
+
+func TestCid(t *testing.T) {
+	data := []byte("yet another data")
+	block := NewBlock(data)
+	c := block.Cid()
+
+	if !bytes.Equal(block.Multihash(), c.Hash()) {
+		t.Error("key contains wrong data")
+	}
+}
+
+func TestManualHash(t *testing.T) {
+	oldDebugState := u.Debug
+	defer (func() {
+		u.Debug = oldDebugState
+	})()
+
+	data := []byte("I can't figure out more names .. data")
+	hash, err := mh.Sum(data, mh.SHA2_256, -1)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	c := cid.NewCidV0(hash)
+
+	u.Debug = false
+	block, err := NewBlockWithCid(data, c)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(block.Multihash(), hash) {
+		t.Error("wrong multihash")
+	}
+
+	data[5] = byte((uint32(data[5]) + 5) % 256) // Transfrom hash to be different
+	block, err = NewBlockWithCid(data, c)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(block.Multihash(), hash) {
+		t.Error("wrong multihash")
+	}
+
+	u.Debug = true
+
+	_, err = NewBlockWithCid(data, c)
+	if err != ErrWrongHash {
+		t.Fatal(err)
+	}
+}

go.mod

@@ -3,22 +3,20 @@ module github.com/ipfs/go-block-format
 go 1.18
 
 require (
-	github.com/ipfs/go-cid v0.3.2
-	github.com/ipfs/go-libipfs v0.3.0
+	github.com/ipfs/go-cid v0.0.7
+	github.com/ipfs/go-ipfs-util v0.0.2
+	github.com/multiformats/go-multihash v0.0.14
 )
 
 require (
-	github.com/ipfs/go-ipfs-util v0.0.2 // indirect
-	github.com/klauspost/cpuid/v2 v2.1.1 // indirect
-	github.com/minio/sha256-simd v1.0.0 // indirect
-	github.com/mr-tron/base58 v1.2.0 // indirect
-	github.com/multiformats/go-base32 v0.1.0 // indirect
+	github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1 // indirect
+	github.com/minio/sha256-simd v0.1.1-0.20190913151208-6de447530771 // indirect
+	github.com/mr-tron/base58 v1.1.3 // indirect
+	github.com/multiformats/go-base32 v0.0.3 // indirect
 	github.com/multiformats/go-base36 v0.1.0 // indirect
-	github.com/multiformats/go-multibase v0.1.1 // indirect
-	github.com/multiformats/go-multihash v0.2.1 // indirect
-	github.com/multiformats/go-varint v0.0.6 // indirect
+	github.com/multiformats/go-multibase v0.0.3 // indirect
+	github.com/multiformats/go-varint v0.0.5 // indirect
 	github.com/spaolacci/murmur3 v1.1.0 // indirect
-	golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e // indirect
-	golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab // indirect
-	lukechampine.com/blake3 v1.1.7 // indirect
+	golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8 // indirect
+	golang.org/x/sys v0.0.0-20190412213103-97732733099d // indirect
 )

go.sum

@@ -1,44 +1,32 @@
-github.com/ipfs/go-cid v0.3.2 h1:OGgOd+JCFM+y1DjWPmVH+2/4POtpDzwcr7VgnB7mZXc=
-github.com/ipfs/go-cid v0.3.2/go.mod h1:gQ8pKqT/sUxGY+tIwy1RPpAojYu7jAyCp5Tz1svoupw=
+github.com/ipfs/go-cid v0.0.7 h1:ysQJVJA3fNDF1qigJbsSQOdjhVLsOEoPdh0+R97k3jY=
+github.com/ipfs/go-cid v0.0.7/go.mod h1:6Ux9z5e+HpkQdckYoX1PG/6xqKspzlEIR5SDmgqgC/I=
 github.com/ipfs/go-ipfs-util v0.0.2 h1:59Sswnk1MFaiq+VcaknX7aYEyGyGDAA73ilhEK2POp8=
 github.com/ipfs/go-ipfs-util v0.0.2/go.mod h1:CbPtkWJzjLdEcezDns2XYaehFVNXG9zrdrtMecczcsQ=
-github.com/ipfs/go-libipfs v0.3.0 h1:YvzFWGcl88eiz2tjOheNqaeQseH+dW3fUKrSaHOG/dU=
-github.com/ipfs/go-libipfs v0.3.0/go.mod h1:pSUHZ5qPJTAidsxe9bAeHp3KIiw2ODEW2a2kM3v+iXI=
-github.com/klauspost/cpuid/v2 v2.0.4/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
-github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
-github.com/klauspost/cpuid/v2 v2.1.1 h1:t0wUqjowdm8ezddV5k0tLWVklVuvLJpoHeb4WBdydm0=
-github.com/klauspost/cpuid/v2 v2.1.1/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY=
+github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1 h1:lYpkrQH5ajf0OXOcUbGjvZxxijuBwbbmlSxLiuofa+g=
 github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1/go.mod h1:pD8RvIylQ358TN4wwqatJ8rNavkEINozVn9DtGI3dfQ=
+github.com/minio/sha256-simd v0.1.1-0.20190913151208-6de447530771 h1:MHkK1uRtFbVqvAgvWxafZe54+5uBxLluGylDiKgdhwo=
 github.com/minio/sha256-simd v0.1.1-0.20190913151208-6de447530771/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM=
-github.com/minio/sha256-simd v1.0.0 h1:v1ta+49hkWZyvaKwrQB8elexRqm6Y0aMLjCNsrYxo6g=
-github.com/minio/sha256-simd v1.0.0/go.mod h1:OuYzVNI5vcoYIAmbIvHPl3N3jUzVedXbKy5RFepssQM=
+github.com/mr-tron/base58 v1.1.0/go.mod h1:xcD2VGqlgYjBdcBLw+TuYLr8afG+Hj8g2eTVqeSzSU8=
+github.com/mr-tron/base58 v1.1.3 h1:v+sk57XuaCKGXpWtVBX8YJzO7hMGx4Aajh4TQbdEFdc=
 github.com/mr-tron/base58 v1.1.3/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
-github.com/mr-tron/base58 v1.2.0 h1:T/HDJBh4ZCPbU39/+c3rRvE0uKBQlU27+QI8LJ4t64o=
-github.com/mr-tron/base58 v1.2.0/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
-github.com/multiformats/go-base32 v0.1.0 h1:pVx9xoSPqEIQG8o+UbAe7DNi51oej1NtK+aGkbLYxPE=
-github.com/multiformats/go-base32 v0.1.0/go.mod h1:Kj3tFY6zNr+ABYMqeUNeGvkIC/UYgtWibDcT0rExnbI=
+github.com/multiformats/go-base32 v0.0.3 h1:tw5+NhuwaOjJCC5Pp82QuXbrmLzWg7uxlMFp8Nq/kkI=
+github.com/multiformats/go-base32 v0.0.3/go.mod h1:pLiuGC8y0QR3Ue4Zug5UzK9LjgbkL8NSQj0zQ5Nz/AA=
 github.com/multiformats/go-base36 v0.1.0 h1:JR6TyF7JjGd3m6FbLU2cOxhC0Li8z8dLNGQ89tUg4F4=
 github.com/multiformats/go-base36 v0.1.0/go.mod h1:kFGE83c6s80PklsHO9sRn2NCoffoRdUUOENyW/Vv6sM=
-github.com/multiformats/go-multibase v0.1.1 h1:3ASCDsuLX8+j4kx58qnJ4YFq/JWTJpCyDW27ztsVTOI=
-github.com/multiformats/go-multibase v0.1.1/go.mod h1:ZEjHE+IsUrgp5mhlEAYjMtZwK1k4haNkcaPg9aoe1a8=
+github.com/multiformats/go-multibase v0.0.3 h1:l/B6bJDQjvQ5G52jw4QGSYeOTZoAwIO77RblWplfIqk=
+github.com/multiformats/go-multibase v0.0.3/go.mod h1:5+1R4eQrT3PkYZ24C3W2Ue2tPwIdYQD509ZjSb5y9Oc=
 github.com/multiformats/go-multihash v0.0.13/go.mod h1:VdAWLKTwram9oKAatUcLxBNUjdtcVwxObEQBtRfuyjc=
-github.com/multiformats/go-multihash v0.2.1 h1:aem8ZT0VA2nCHHk7bPJ1BjUbHNciqZC/d16Vve9l108=
-github.com/multiformats/go-multihash v0.2.1/go.mod h1:WxoMcYG85AZVQUyRyo9s4wULvW5qrI9vb2Lt6evduFc=
+github.com/multiformats/go-multihash v0.0.14 h1:QoBceQYQQtNUuf6s7wHxnE2c8bhbMqhfGzNI032se/I=
+github.com/multiformats/go-multihash v0.0.14/go.mod h1:VdAWLKTwram9oKAatUcLxBNUjdtcVwxObEQBtRfuyjc=
+github.com/multiformats/go-varint v0.0.5 h1:XVZwSo04Cs3j/jS0uAEPpT3JY6DzMcVLLoWOSnCxOjg=
 github.com/multiformats/go-varint v0.0.5/go.mod h1:3Ls8CIEsrijN6+B7PbrXRPxHRPuXSrVKRY101jdMZYE=
-github.com/multiformats/go-varint v0.0.6 h1:gk85QWKxh3TazbLxED/NlDVv8+q+ReFJk7Y2W/KhfNY=
-github.com/multiformats/go-varint v0.0.6/go.mod h1:3Ls8CIEsrijN6+B7PbrXRPxHRPuXSrVKRY101jdMZYE=
 github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0bLI=
 github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8 h1:1wopBVtVdWnn03fZelqdXTqk7U7zPQCb+T4rbU9ZEoU=
 golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e h1:T8NU3HyQ8ClP4SEE+KbFlg6n0NhuTsN4MyznaarGsZM=
-golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab h1:2QkjZIsXupsJbJIdSjjUOgWK3aEtzyuh2mPt3l/CkeU=
-golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-lukechampine.com/blake3 v1.1.7 h1:GgRMhmdsuK8+ii6UZFDL8Nb+VyMwadAgcJyfYHxG6n0=
-lukechampine.com/blake3 v1.1.7/go.mod h1:tkKEOtDkNtklkXtLNEOGNq5tcV90tJiA1vAA12R78LA=