feat: switch to raw multihashes for blocks

Part of: ipfs/kubo#6815

Author: Stebalien

go.mod

@@ -4,4 +4,7 @@ require (
 	github.com/ipfs/go-cid v0.0.3
 	github.com/ipfs/go-datastore v0.1.1
 	github.com/multiformats/go-base32 v0.0.3
+	github.com/multiformats/go-multihash v0.0.1
 )
+
+go 1.13

go.sum

@@ -6,14 +6,8 @@ github.com/gxed/hashland/keccakpg v0.0.1 h1:wrk3uMNaMxbXiHibbPO4S0ymqJMm41WiudyF
 github.com/gxed/hashland/keccakpg v0.0.1/go.mod h1:kRzw3HkwxFU1mpmPP8v1WyQzwdGfmKFJ6tItnhQ67kU=
 github.com/gxed/hashland/murmur3 v0.0.1 h1:SheiaIt0sda5K+8FLz952/1iWS9zrnKsEJaOJu4ZbSc=
 github.com/gxed/hashland/murmur3 v0.0.1/go.mod h1:KjXop02n4/ckmZSnY2+HKcLud/tcmvhST0bie/0lS48=
-github.com/ipfs/go-cid v0.0.1 h1:GBjWPktLnNyX0JiQCNFpUuUSoMw5KMyqrsejHYlILBE=
-github.com/ipfs/go-cid v0.0.1/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
 github.com/ipfs/go-cid v0.0.3 h1:UIAh32wymBpStoe83YCzwVQQ5Oy/H0FdxvUS6DJDzms=
 github.com/ipfs/go-cid v0.0.3/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
-github.com/ipfs/go-datastore v0.0.1 h1:AW/KZCScnBWlSb5JbnEnLKFWXL224LBEh/9KXXOrUms=
-github.com/ipfs/go-datastore v0.0.1/go.mod h1:d4KVXhMt913cLBEI/PXAy6ko+W7e9AhyAKBGh803qeE=
-github.com/ipfs/go-datastore v0.1.0 h1:TOxI04l8CmO4zGtesENhzm4PwkFwJXY3rKiYaaMf9fI=
-github.com/ipfs/go-datastore v0.1.0/go.mod h1:d4KVXhMt913cLBEI/PXAy6ko+W7e9AhyAKBGh803qeE=
 github.com/ipfs/go-datastore v0.1.1 h1:F4k0TkTAZGLFzBOrVKDAvch6JZtuN4NHkfdcEZL50aI=
 github.com/ipfs/go-datastore v0.1.1/go.mod h1:w38XXW9kVFNp57Zj5knbKWM2T+KOZCGDRVNdgPHtbHw=
 github.com/ipfs/go-ipfs-delay v0.0.0-20181109222059-70721b86a9a8/go.mod h1:8SP1YXK1M1kXuc4KJZINY3TQQ03J2rwBG9QfXmbRPrw=

key.go

@@ -6,6 +6,7 @@ import (
 	cid "github.com/ipfs/go-cid"
 	"github.com/ipfs/go-datastore"
 	"github.com/multiformats/go-base32"
+	mh "github.com/multiformats/go-multihash"
 )
 
 // NewKeyFromBinary creates a new key from a byte slice.
@@ -21,16 +22,30 @@ func BinaryFromDsKey(k datastore.Key) ([]byte, error) {
 	return base32.RawStdEncoding.DecodeString(k.String()[1:])
 }
 
+// MultihashToDsKey creates a Key from the given Multihash.
+func MultihashToDsKey(k mh.Multihash) datastore.Key {
+	return NewKeyFromBinary(k)
+}
+
+// DsKeyToMultihash converts a dsKey to the corresponding Multihash.
+func DsKeyToMultihash(dsKey datastore.Key) (mh.Multihash, error) {
+	kb, err := BinaryFromDsKey(dsKey)
+	if err != nil {
+		return nil, err
+	}
+	return mh.Cast(kb)
+}
+
 // CidToDsKey creates a Key from the given Cid.
 func CidToDsKey(k cid.Cid) datastore.Key {
-	return NewKeyFromBinary(k.Bytes())
+	return MultihashToDsKey(k.Hash())
 }
 
 // DsKeyToCid converts the given Key to its corresponding Cid.
 func DsKeyToCid(dsKey datastore.Key) (cid.Cid, error) {
-	kb, err := BinaryFromDsKey(dsKey)
+	hash, err := DsKeyToMultihash(dsKey)
 	if err != nil {
-		return cid.Cid{}, err
+		return cid.Cid{}, nil
 	}
-	return cid.Cast(kb)
+	return cid.NewCidV1(cid.Raw, hash), nil
 }